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 for boosting, a plasma generator and a driving mechanism, the power supply driving circuit comprises a booster circuit, a current detection circuit and a microcontroller. The low-voltage side power supply supplies power to the positive electrode of the plasma generator after being boosted by the boosted circuit, and the current detection circuit is arranged between the negative electrode and the grounding end; the microcontroller is provided with a first port for outputting a PWM signal and a second port for outputting a control signal, the input side of the booster circuit is provided with a switching tube for conducting control based on the PWM signal, and the driving mechanism comprises a motor rotating based on the control signal and an adjusting mechanism driven by the motor and used for adjusting the distance between the positive electrode and the negative electrode. In this way, the adjusting mechanism is controlled to adjust the distance between the positive electrode and the negative electrode based on the control signal, and the influence of electrode aging in the working process of the streamer sterilization device is effectively reduced.

Description

Technical Field

[0001] The present application relates to the field of air purification, 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 of the air conditioner and in the room, and purify the air well.

[0004] However, as the two metal electrodes are used more times or for longer periods of time, they may age, that is, the current between the two metal electrodes decreases, thereby reducing the effectiveness of the two metal electrodes in ionizing the air flowing between the electrodes, thereby reducing 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 reduce the influence of electrode aging on the sterilization effect.

[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, a plasma generator operating based on a drive power output by the power drive circuit, and a drive mechanism;

[0008] The plasma generator includes a positive electrode and a negative electrode for producing bactericidal factors;

[0009] The power drive circuit comprises: a boost circuit, a current detection circuit and a microcontroller; the low-voltage side power supply is boosted by the boost circuit and then supplies power to the positive electrode of the plasma generator, and the current detection circuit is arranged between the negative electrode of the plasma generator and the ground terminal;

[0010] The microcontroller has a first port for outputting a pulse width modulation (PWM) signal and a second port for outputting a control signal. A switch tube for conducting control based on the PWM signal is provided on the input side of the boost circuit. The driving mechanism includes a motor that rotates based on the control signal and an adjusting mechanism that is driven by the motor and adjusts the distance between the positive electrode and the negative electrode. The microcontroller also receives an electrical signal generated by the current detection circuit, and the control signal is generated based on the electrical signal.

[0011] In some embodiments, the streamer sterilization device further comprises:

[0012] The voltage doubler circuit is arranged between the output side of the voltage booster circuit and the positive electrode of the plasma generator.

[0013] In some embodiments, the boost circuit comprises:

[0014] The 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.

[0015] In some embodiments, the streamer sterilization device further comprises:

[0016] The wind speed control circuit is connected to the microcontroller and is used to adjust the speed of the fan and control the wind speed between the positive electrode and the negative electrode.

[0017] In some embodiments, the regulating mechanism comprises:

[0018] A screw rod, the bottom of which is connected to the motor, and the screw rod rotates based on the motor;

[0019] A slider is arranged on the screw rod, the slider is connected to the positive electrode or the negative electrode, and the slider drives the positive electrode or the negative electrode to slide on the screw rod based on the rotation of the screw rod.

[0020] 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:

[0021] Based on the electrical signal, determining an operating current between the positive electrode and the negative electrode;

[0022] If it is determined that the operating current is less than the rated current threshold, the control signal is generated; wherein the control signal is used to control the driving mechanism to reduce the distance between the positive electrode and the negative electrode until the operating current is equal to the rated current threshold.

[0023] In some embodiments, if it is determined that the operating current is less than the rated current threshold, the method further includes:

[0024] Based on the adjustment of the duty cycle of the PWM signal, the output voltage of the power driving circuit is controlled to increase.

[0025] In some embodiments, the method further comprises:

[0026] Determining the working mode of the streamer sterilization device;

[0027] When the working mode is the first working mode, increasing the duty cycle of the PWM signal and increasing the distance between the positive electrode and the negative electrode;

[0028] When the working mode is the second working mode, reducing the duty cycle of the PWM signal and reducing the distance between the positive electrode and the negative electrode;

[0029] The power consumption of the streamer sterilization device when operating in the first operating mode is higher than the power consumption of the streamer sterilization device when operating in the second operating mode.

[0030] In some embodiments, determining the working mode of the streamer sterilization device includes:

[0031] Based on the gas sensor, the air quality detection data of the environment in which the streamer sterilization device is located is obtained;

[0032] When the air quality detection data is lower than a first threshold, it is determined that the working mode of the streamer sterilization device is the first working mode.

[0033] In some embodiments, determining the working mode of the streamer sterilization device includes:

[0034] Based on the photosensitive sensor, the light intensity detection data of the environment where the streamer sterilization device is located is obtained;

[0035] When the light intensity detection data is lower than a second threshold, it is determined that the working mode of the streamer sterilization device is the second working mode.

[0036] 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.

[0037] 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.

[0038] In some embodiments, the electronic device is an air conditioner.

[0039] 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.

[0040] The technical solution provided by the embodiment of the present application is that the streamer sterilization device includes: a power drive circuit for boosting, a plasma generator working based on the driving power output by the power drive circuit, and a driving mechanism; the plasma generator includes a positive electrode and a negative electrode for generating a sterilization factor; the power drive circuit includes: a boost circuit, a current detection 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 detection circuit is arranged between the negative electrode of the plasma generator and the ground terminal; the microcontroller has a first port for outputting a pulse width modulation PWM signal and a second port for outputting a control signal, a switch tube for conduction control based on the PWM signal is arranged on the input side of the boost circuit, the driving mechanism includes a motor that rotates based on the control signal and an adjustment mechanism driven by the motor and adjusting the distance between the positive electrode and the negative electrode, the microcontroller also receives the electrical signal generated by the current detection circuit, and the control signal is generated based on the electrical signal. In this way, by detecting the current between the two electrodes and generating a control signal according to the detected current, and adjusting the distance between the two electrodes based on the driving mechanism, the current between the two electrodes is increased and the influence of electrode aging is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of the structure of the streamer sterilization device according to an embodiment of the present application;

[0042] Figure 2 This is a circuit diagram of the streamer sterilization device according to an embodiment of the present application;

[0043] Figure 3 This is a structural schematic diagram of an adjustment mechanism in an application example of the present application;

[0044] Figure 4 This is a circuit diagram of a streamer sterilization device in an application example of the present application;

[0045] Figure 5 A schematic diagram of a PWM signal in an application example of the present application;

[0046] Figure 6 This is a schematic diagram of the framework of a streamer sterilization device in an application example of the present application;

[0047] Figure 7 This is a flow chart of a control method of a streamer sterilization device according to an embodiment of the present application;

[0048] Figure 8 The flow chart of the control method of the streamer sterilization device in an application example of this application is as follows Figure 1 ;

[0049] Fig. 9 The flow chart of the control method of the streamer sterilization device in an application example of this application is as follows Figure 2 ;

[0050] Fig.10 The flow chart of the control method of the streamer sterilization device in an application example of this application is as follows Figure 3 . DETAILED DESCRIPTION

[0051] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] It is understandable that the plasma generator includes a positive electrode and a negative electrode arranged at intervals, and the air can be broken down between the positive electrode and the negative electrode 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. The magnitude of the current flowing from the positive electrode to the negative electrode is related to the number of free radicals and highly oxidizing molecules generated by ionized air. In general, the greater the current flowing from the positive electrode to the negative electrode, the better the sterilization effect.

[0056] However, as the discharge time and number of discharges of the plasma generator accumulate, the positive electrode and the negative electrode of the plasma generator may experience electrode aging, that is, the performance of the positive electrode and the negative electrode decreases, resulting in a decrease in the current between the positive electrode and the negative electrode, thereby affecting the sterilization effect of ionized air.

[0057] It can be seen that after the current streamer sterilization device is used for a long time, the electrodes will age, which will reduce the sterilization effect of the streamer sterilization device and affect the user experience.

[0058] Based on this, an embodiment of the present application provides a streamer sterilization device that can effectively reduce the impact of electrode aging on the sterilization effect.

[0059] like Figure 2 As shown, the streamer sterilization device of the embodiment of the present application includes: a power drive circuit for boosting, a plasma generator and a drive mechanism that works based on the drive power output by the power drive circuit;

[0060] The power drive circuit includes: a boost circuit, a current detection circuit and a microcontroller; the low-voltage side power supply is boosted by the boost circuit and then supplies power to the positive electrode of the plasma generator, and the current detection circuit is arranged between the negative electrode of the plasma generator and the ground terminal;

[0061] The microcontroller has a first port for outputting a pulse width modulation (PWM) signal and a second port for outputting a control signal. A switch tube for conducting control based on the PWM signal is provided on the input side of the boost circuit. The driving mechanism includes a motor that rotates based on the control signal and an adjusting mechanism that is driven by the motor and adjusts the distance between the positive electrode and the negative electrode. The microcontroller also receives an electrical signal generated by the current detection circuit, and the control signal is generated based on the electrical signal.

[0062] It can be understood that in the embodiment of the present application, since the microcontroller outputs PWM signals and control signals, a switch tube for conduction control based on the PWM signal is set on the input side of the boost circuit, and the driving mechanism includes a motor that rotates based on the control signal and an adjustment mechanism that is driven by the motor and adjusts the distance between the positive electrode and the negative electrode. Among them, the magnitude of the output voltage V1 on the output side of the boost circuit can be adjusted based on the duty cycle adjustment of the PWM signal, and the magnitude of the distance between the positive electrode and the negative electrode of the plasma generator can be adjusted based on the duty cycle adjustment of the control signal. In this way, the magnitude of the current between the positive electrode and the negative electrode of the plasma generator can be increased based on the adjustment of the PWM signal and / or the control signal, and the influence of electrode aging during the operation of the streamer sterilization device can be effectively reduced.

[0063] Exemplarily, the streamer sterilization device further includes:

[0064] The voltage doubler circuit is arranged between the output side of the voltage booster circuit and the positive electrode of the plasma generator.

[0065] 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 outputted from the output side of the boost circuit. For example, assuming that the boost multiple of the voltage doubler circuit is N, the voltage signal outputted by the voltage doubler circuit is N*V1.

[0066] 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.

[0067] Exemplarily, the boost circuit comprises:

[0068] The 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.

[0069] It can be understood that in order to achieve the boost of the low-voltage side power supply, a transformer can be used as a boost circuit. By increasing the ratio of the number of turns of the secondary winding of the transformer to the number of turns of the primary winding, the voltage V2 input to the primary winding of the transformer can be boosted. For example, assuming that the ratio of the number of turns of the secondary winding to the number of turns of the primary winding is M, the voltage signal output by the secondary winding of the transformer is M*V2.

[0070] Exemplarily, the streamer sterilization device further includes:

[0071] The wind speed control circuit is connected to the microcontroller and is used to adjust the speed of the fan and control the wind speed between the positive electrode and the negative electrode.

[0072] It can be understood that in order to further improve the sterilization effect of the streamer sterilization device, a wind speed control circuit can be set, which can control the speed of the fan. For example, the wind speed between the positive electrode and the negative electrode of the plasma generator can be increased, thereby increasing the amount of purified air passing through the positive electrode and the negative electrode per unit time, thereby achieving the effect of improving the sterilization effect.

[0073] like Figure 3 As shown, the adjustment mechanism includes:

[0074] A screw rod 10, the bottom of which is connected to the motor 20, and the screw rod 10 rotates based on the motor 20;

[0075] The slider 30 is disposed on the screw rod 10 . The slider 30 is connected to the negative electrode 40 . The slider 30 drives the negative electrode 40 to slide on the screw rod 10 based on the rotation of the screw rod 10 .

[0076] like Figure 3 As shown, the positive electrode 50 is not connected to the lead screw 10 , so the position of the positive electrode 50 will not be adjusted when the lead screw 10 rotates.

[0077] It is understandable that in order to further improve the sterilization effect of the streamer sterilization device, a screw rod can be connected to a motor, and a slider connected to the negative electrode of the plasma generator can be provided on the screw rod. The screw rod rotates based on the motor, so that the slider drives the negative electrode to slide on the screw rod. In this way, the position of the negative electrode on the screw rod is adjusted by the adjustment mechanism, so as to adjust the distance between the positive electrode and the negative electrode of the plasma generator. For example, the distance between the positive electrode and the negative electrode of the plasma generator is reduced by the adjustment mechanism, so that the current between the positive electrode and the negative electrode is increased, so that the free radicals and highly oxidizing molecules generated by the ionized air between the positive electrode and the negative electrode are increased, thereby achieving the effect of improving the sterilization effect.

[0078] Here, a lead screw may be connected to the positive electrode of the plasma generator through a slider, and the position of the positive electrode on the lead screw may be adjusted by an adjustment mechanism to adjust the distance between the positive electrode and the negative electrode of the plasma generator.

[0079] Here, the motor may be a stepper motor, and the speed of the stepper motor is controlled by controlling the frequency of the signal. When the stepper motor rotates, the motor drives the lead screw to rotate, and the slider can move up and down under the rotation of the lead screw. The rotation direction of the stepper motor and the movement direction of the negative electrode can be set according to actual needs. For example, when the stepper motor rotates clockwise, the negative electrode moves downward with the slider, and when the stepper motor rotates counterclockwise, the negative electrode moves upward, so that the distance between the two poles can be adjusted.

[0080] Here, the positive electrode and the negative electrode are connected by a high-voltage wire. Considering that the connecting wire needs to move with the positive electrode or the negative electrode when adjusting the two-stage spacing, a soft flat cable can be selected as the connecting wire to improve its reliability.

[0081] Exemplarily, the plasma generator may be a dielectric barrier discharge generator for dielectric barrier discharge.

[0082] The streamer sterilization device of the embodiment of the present application is illustrated below with reference to an application example.

[0083] 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.

[0084] 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 switch tube).

[0085] like Figure 4 As shown, the switch tube Q1 can be a triode, the drain 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 gate 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 PWM signal output by the microcontroller.

[0086] 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 D4, a resistor R1 and a capacitor C2, the cathode of the diode D4 is connected to the first end of the primary winding, the anode of the diode D4 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.

[0087] For example, based on the duty cycle adjustment of the 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.

[0088] 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.

[0089] The microcontroller also receives an electrical signal from the current sensing circuit. Figure 4As shown, the current detection circuit includes: a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C5, a capacitor C6 and an operational amplifier IC1, a first end of the resistor R6 is connected to the cathode electrode of the dielectric barrier discharge generator, a second end of the resistor R6 is grounded, a first end of the resistor R4 is connected to the cathode electrode of the dielectric barrier discharge generator, a second end of the resistor R4 is connected to the inverting input terminal of the operational amplifier IC1, a first end of the resistor R7 is grounded, a second end of the resistor R4 is connected to the non-inverting input terminal of the operational amplifier IC1, a first end of the resistor R5 is connected to the output terminal of the operational amplifier IC1, a second end of the resistor R5 is connected to the first end of the capacitor C6, a second end of the capacitor C6 is grounded, and a resistor R3 and a capacitor C5 are connected in parallel between the first end of the resistor R5 and the second end of the resistor R4.

[0090] It is understandable that by detecting the voltage passing through R6, the current passing through R6, that is, the current flowing out of the negative electrode of the dielectric barrier discharge generator, can be determined. In this way, the performance of the positive electrode and the negative electrode can be determined by comparing the current detection with the rated current threshold. Exemplarily, when the detected current is less than the rated current threshold, it can be considered that the performance of the positive electrode and the negative electrode has declined and the electrode has aged. Here, the rated current threshold is the operating current of the dielectric barrier discharge generator under the rated operating state (rated wind speed, rated drive voltage and rated two-stage spacing).

[0091] Here, by introducing components such as operational amplifier IC1, the current flowing out of the negative electrode of the dielectric barrier discharge generator is amplified, and the amplified current is detected to determine the magnitude of the current flowing out of the negative electrode. In this way, when the current is small, the introduction of operational amplifier IC1 can reduce the error in current measurement, thereby improving the accuracy of the detected current.

[0092] The microcontroller also outputs a control signal to the driving mechanism, the control signal being generated based on the electrical signal of the current detection circuit. The driving mechanism includes: a motor that rotates based on the control signal and an adjusting mechanism that is driven by the motor and adjusts the distance between the positive electrode and the negative electrode.

[0093] It can be understood that based on the adjustment of the control signal, the driving mechanism can adjust the distance between the positive electrode and the negative electrode, and the two-stage distance can be adjusted in time when the electrode is aged, thereby reducing the impact of electrode aging.

[0094] The present application also provides a framework diagram of the streamer sterilization device described in the above embodiment, such as Figure 6 As shown, the driving mechanism, the wind speed control circuit, the transformer, the plasma generator and the current detection circuit are controlled by the microcontroller, and the streamer sterilization device is controlled by the microcontroller.

[0095] In one embodiment, if the streamer sterilization device needs to operate at high performance, the microcontroller can control the driving mechanism to increase the two-stage spacing, control the wind speed control circuit to increase the wind speed, and control the transformer to increase the driving voltage, thereby improving the sterilization effect.

[0096] In another embodiment, if the streamer sterilization device requires low power consumption or low noise operation, the microcontroller can control the driving mechanism to reduce the two-stage spacing, control the wind speed control circuit to reduce the wind speed, and control the transformer to reduce the driving voltage, thereby reducing power consumption and noise.

[0097] In yet another embodiment, when the microcontroller receives an electrical signal from the current detection circuit and confirms that the electrode has aged, the microcontroller can control the driving mechanism to adjust the distance between the two stages of the plasma generator, or control the transformer to adjust the driving voltage of the plasma generator, adjust the current between the two stages of the plasma generator, and reduce the impact of electrode aging.

[0098] The present application also provides a control method for the streamer sterilization device described in the above embodiment. Figure 7 As shown, the method includes:

[0099] Step 701: determine the operating current between the positive electrode and the negative electrode based on the electrical signal.

[0100] It is understandable that if Figure 4 As shown, as the current flowing out of the cathode electrode of the plasma generator decreases, the electrical signal of the current detection circuit will decrease accordingly. In this way, the current between the two electrodes of the plasma generator can be determined based on the electrical signal of the current detection circuit.

[0101] Exemplarily, the control method further includes:

[0102] Step 702, if it is determined that the operating current is less than the rated current threshold, generate the control signal; wherein the control signal is used to control the driving mechanism to reduce the distance between the positive electrode and the negative electrode until the operating current is equal to the rated current threshold.

[0103] It can be understood that when the operating current is less than the rated current threshold, it indicates that the two stages of the plasma generator have aged.

[0104] Here, the rated current threshold is the operating current of the plasma generator under the rated operating state (rated wind speed, rated driving voltage and rated two-stage distance).

[0105] like Figure 2As shown, when the working current is less than the rated current threshold, the microcontroller can generate a control signal to control the rotation of the motor in the driving mechanism, thereby driving the adjustment mechanism to adjust the two-stage spacing. In this way, by adjusting the two-stage spacing by the adjustment mechanism, the current between the two poles of the plasma generator increases until it is equal to the rated current threshold, so that the current between the two poles remains unchanged, reducing the impact of electrode aging on the sterilization effect.

[0106] Exemplarily, if it is determined that the operating current is less than the rated current threshold, the method further includes:

[0107] Based on the adjustment of the duty cycle of the PWM signal, the output voltage of the power driving circuit is controlled to increase.

[0108] It is understandable that if Figure 5 As shown in the figure, as the duty cycle of the PWM signal decreases, the output voltage V1 of the secondary winding will decrease accordingly. In this way, the initial duty cycle of the PWM signal can be reasonably set to adjust the voltage of the driving power supply, thereby adjusting the current between the two electrodes, reducing the impact of electrode aging, and meeting the air purification needs of the streamer sterilization device.

[0109] Exemplarily, the method further includes:

[0110] Determining the working mode of the streamer sterilization device;

[0111] When the working mode is the first working mode, increasing the duty cycle of the PWM signal and increasing the distance between the positive electrode and the negative electrode;

[0112] When the working mode is the second working mode, reducing the duty cycle of the PWM signal and reducing the distance between the positive electrode and the negative electrode;

[0113] The power consumption of the streamer sterilization device when operating in the first operating mode is higher than the power consumption of the streamer sterilization device when operating in the second operating mode.

[0114] It is understandable that if Figure 2 As shown, by adjusting the duty cycle of the PWM signal by the microcontroller, the voltage of the driving power supply can be adjusted, and by generating a control signal by the microcontroller, the driving mechanism can be controlled to adjust the spacing between the positive electrode and the negative electrode. In this way, by determining the current working mode of the streamer sterilization device, the duty cycle adjustment of the PWM signal and the generation of the control signal can be reasonably set to meet the needs of users in different working modes and improve the user experience.

[0115] Here, the first working mode may be a high-performance mode (maximum sterilization performance), and the second working mode may be a low-power consumption mode.

[0116] Exemplarily, determining the working mode of the streamer sterilization device includes:

[0117] Based on the gas sensor, the air quality detection data of the environment in which the streamer sterilization device is located is obtained;

[0118] When the air quality detection data is lower than a first threshold, it is determined that the working mode of the streamer sterilization device is the first working mode.

[0119] It can be understood that by detecting the air quality of the environment in which the streamer sterilization device is located, when it is determined that the current air quality is poor, the sterilization effect of the streamer sterilization device can be increased by running the first working mode, thereby purifying the current air more quickly, thereby improving the air quality and user experience.

[0120] Here, the first threshold value may be a preset value or a value set by the user.

[0121] Exemplarily, determining the working mode of the streamer sterilization device includes:

[0122] Based on the photosensitive sensor, the light intensity detection data of the environment where the streamer sterilization device is located is obtained;

[0123] When the light intensity detection data is lower than a second threshold, it is determined that the working mode of the streamer sterilization device is the second working mode.

[0124] It is understandable that by detecting the light intensity of the environment in which the streamer sterilization device is located, the current time state can be known. When it is determined that the current light intensity is weak and the time state is night, the noise emitted by the streamer sterilization device during operation is reduced by running the second working mode, thereby reducing the impact of the streamer sterilization device on the user and improving the user experience.

[0125] Here, when the streamer sterilization device works in the second mode, the light emitted between the two poles is also the weakest, so as to avoid the light being too strong to affect the user's rest.

[0126] Here, the second threshold value may be a preset value or a value set by the user.

[0127] The control method of the streamer sterilization device in the embodiment of the present application is illustrated below with reference to an application example.

[0128] like Figure 8 As shown, in this application example, the control method of the streamer sterilization device includes:

[0129] Step 801, switching to a mode for solving electrode aging.

[0130] Here, the motor aging solution mode is a working mode applied when the electrodes of the streamer sterilization device are aged.

[0131] Step 802, operate at rated spacing, rated wind speed, and rated driving voltage, and read the operating current.

[0132] Here, by reading the working current under rated conditions such as rated spacing, rated wind speed, and rated driving voltage, it is convenient to compare it with the rated current under rated conditions and reduce errors.

[0133] Step 803, determine whether the operating current is less than the rated current, if not, return to step 802, if so, go to step 804.

[0134] Here, by comparing the operating current with the rated current, it is determined whether the electrode has aged.

[0135] Step 804, increasing the driving voltage.

[0136] Here, when it is determined that the electrode is aged, the driving voltage across the plasma generator is increased to increase the operating current, thereby reducing the influence of the electrode aging.

[0137] Step 805, determine whether the operating current is greater than the rated current, if not, go to step 807, if so, go to step 806.

[0138] Step 806, taking the adjusted voltage as the rated voltage.

[0139] Here, after the working current is greater than the rated current, the current voltage is used as the rated voltage, so that the working current of the streamer sterilization device in subsequent work is greater than the rated current, thereby ensuring the sterilization effect.

[0140] Step 807, reducing the distance between the two levels until the operating current is greater than the rated current, and using the adjusted distance as the rated distance.

[0141] Here, after the working current is greater than the rated current, the current spacing is used as the rated spacing, so that the working current of the streamer sterilization device in subsequent work is greater than the rated current, thereby ensuring the sterilization effect.

[0142] In this application example, the duty cycle adjustment based on the PWM signal and the generation of the control signal are used to control the current between the positive electrode and the negative electrode of the plasma generator. This can solve the problem of reduced sterilization effect due to electrode aging, maintain the sterilization effect of the streamer sterilization device, and improve the user experience.

[0143] like Fig. 9 As shown, in this application example, the control method of the streamer sterilization device also includes:

[0144] Step 901, switch the sterilization performance mode.

[0145] Here, the sterilization performance mode (the aforementioned first working mode) is a working mode in which the sterilization effect of the streamer sterilization device is maximized.

[0146] Step 902: The negative electrode moves upward to the highest rated point, and the driving voltage rises to the highest voltage.

[0147] Here, by increasing the distance between the negative electrode and the positive electrode and increasing the driving voltage, the current between the negative electrode and the positive electrode is increased, thereby improving the sterilization performance of the streamer sterilization device.

[0148] In this application example, the duty cycle adjustment based on the PWM signal and the generation of the control signal are used to control the current between the positive electrode and the negative electrode of the plasma generator. This can improve the sterilization performance of the streamer sterilization device and enhance the user experience.

[0149] like Fig.10 As shown, in this application example, the control method of the streamer sterilization device also includes:

[0150] Step 1001, switch to noise reduction mode.

[0151] Here, the noise reduction mode (the aforementioned second working mode) is a working mode in which the streamer sterilization device operates with low noise and low power consumption.

[0152] Step 1002 , the negative electrode moves downward to the lowest rated point, and the driving voltage drops to the lowest voltage.

[0153] Here, by reducing the distance between the negative electrode and the positive electrode and lowering the driving voltage, the current between the negative electrode and the positive electrode is reduced, thereby reducing the working power consumption and noise of the streamer sterilization device.

[0154] In this application example, the duty cycle adjustment based on the PWM signal and the generation of the control signal are used to control the current between the positive electrode and the negative electrode of the plasma generator. This can reduce the power consumption of the streamer sterilization device and the noise generated by the streamer sterilization device during operation, thereby improving the user experience.

[0155] 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.

[0156] 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.

[0157] 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.

[0158] 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.

[0159] 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.

[0160] 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.

[0161] 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.

[0162] In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0163] 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, a plasma generator operating based on a drive power output by the power drive circuit, and a drive mechanism; The plasma generator includes a positive electrode and a negative electrode for producing bactericidal factors; The power drive circuit comprises: a boost circuit, a current detection circuit and a microcontroller; The low-voltage side power supply is boosted by the boost circuit and supplies power to the positive electrode of the plasma generator, and the current detection circuit is arranged between the negative electrode of the plasma generator and the ground terminal; The microcontroller has a first port for outputting a pulse width modulation (PWM) signal and a second port for outputting a control signal. A switch tube for conducting control based on the PWM signal is provided on the input side of the boost circuit. The driving mechanism includes a motor that rotates based on the control signal and an adjusting mechanism that is driven by the motor and adjusts the distance between the positive electrode and the negative electrode. The microcontroller also receives an electrical signal generated by the current detection circuit, and the control signal is generated based on the electrical signal.

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 comprises: The 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. The streamer sterilization device according to claim 1, characterized in that: The streamer sterilization device also includes: The wind speed control circuit is connected to the microcontroller and is used to adjust the speed of the fan and control the wind speed between the positive electrode and the negative electrode.

5. The streamer sterilization device according to claim 1, characterized in that: The regulating mechanism comprises: A screw rod, the bottom of which is connected to the motor, and the screw rod rotates based on the motor; A slider is arranged on the screw rod, the slider is connected to the positive electrode or the negative electrode, and the slider drives the positive electrode or the negative electrode to slide on the screw rod based on the rotation of the screw rod.

6. A control method for the streamer sterilization device according to any one of claims 1 to 5, characterized in that: include: Based on the electrical signal, determining an operating current between the positive electrode and the negative electrode; If it is determined that the operating current is less than the rated current threshold, the control signal is generated; wherein the control signal is used to control the driving mechanism to reduce the distance between the positive electrode and the negative electrode until the operating current is equal to the rated current threshold.

7. The control method according to claim 6, characterized in that: If it is determined that the operating current is less than the rated current threshold, the method further includes: Based on the adjustment of the duty cycle of the PWM signal, the output voltage of the power driving circuit is controlled to increase.

8. The control method according to claim 6, characterized in that: The method further comprises: Determining the working mode of the streamer sterilization device; When the working mode is the first working mode, increasing the duty cycle of the PWM signal and increasing the distance between the positive electrode and the negative electrode; When the working mode is the second working mode, reducing the duty cycle of the PWM signal and reducing the distance between the positive electrode and the negative electrode; The power consumption of the streamer sterilization device when operating in the first operating mode is higher than the power consumption of the streamer sterilization device when operating in the second operating mode.

9. The control method according to claim 8, characterized in that: Determining the working mode of the streamer sterilization device includes: Based on the gas sensor, the air quality detection data of the environment in which the streamer sterilization device is located is obtained; When the air quality detection data is lower than a first threshold, it is determined that the working mode of the streamer sterilization device is the first working mode.

10. The control method according to claim 8, characterized in that: Determining the working mode of the streamer sterilization device includes: Based on the photosensitive sensor, the light intensity detection data of the environment where the streamer sterilization device is located is obtained; When the light intensity detection data is lower than a second threshold, it is determined that the working mode of the streamer sterilization device is the second working mode.

11. A streamer sterilization device as claimed in any one of claims 1 to 5, characterized in that: The microcontroller is configured to perform the method according to any one of claims 6 to 10.

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

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

14. 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 6 to 10 are implemented.

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