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 which works based on a driving power supply output by the power supply driving circuit, the power supply driving circuit comprises a high-voltage square wave circuit which outputs a first high-voltage square wave signal based on a pulse width modulation (PWM) signal and a high-voltage narrow pulse circuit which outputs a high-voltage narrow pulse signal based on a pulse signal. Wherein the first high-voltage square-wave signal output by the high-voltage square-wave circuit and the high-voltage narrow-pulse signal output by the high-voltage narrow-pulse circuit are superposed to supply power to the plasma generator. Therefore, the working power consumption of the streamer sterilization device can be effectively reduced by adjusting the PWM signal and / or the pulse signal.

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, the current streamer sterilization device needs to output a relatively high voltage to the two metal electrodes when working, and needs to maintain the high voltage output for a period of time, so the power consumption is relatively high. 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 operating power consumption 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 and a plasma generator operated based on a drive power output by the power drive circuit;

[0008] The power drive circuit includes: a high-voltage square wave circuit that outputs a first high-voltage square wave signal based on a pulse width modulation (PWM) signal and a high-voltage narrow pulse circuit that outputs a high-voltage narrow pulse signal based on a pulse signal;

[0009] The first high-voltage square wave signal output by the high-voltage square wave circuit is superimposed on the high-voltage narrow pulse signal output by the high-voltage narrow pulse circuit to supply power to the plasma generator.

[0010] In some embodiments, the high voltage square wave circuit comprises:

[0011] A transformer, the transformer comprising a first secondary winding; the first high-voltage square wave signal is obtained by boosting the low-voltage side power supply through the first secondary winding of the transformer;

[0012] A microcontroller is provided with a first port for outputting the PWM signal, and a first switch tube for conducting control based on the PWM signal is arranged on the primary winding side of the transformer.

[0013] In some embodiments, the transformer further includes a second secondary winding, and the high-voltage narrow pulse circuit includes:

[0014] A narrow pulse generator and a booster coil; the narrow pulse generator is connected to the second secondary winding of the transformer, and the booster coil is arranged between the narrow pulse generator and the positive electrode of the plasma generator; the low-voltage side power supply is boosted by the second secondary winding of the transformer to obtain a second high-voltage square wave signal, the narrow pulse generator generates a narrow pulse signal based on the second high-voltage square wave signal, and the narrow pulse signal is boosted by the booster coil to obtain the high-voltage narrow pulse signal;

[0015] The microcontroller also has a second port for outputting the pulse signal, and the narrow pulse generator is provided with a second switch tube for conducting control based on the pulse signal.

[0016] In some embodiments, the streamer sterilization device further comprises:

[0017] The voltage doubling circuit is arranged between the first secondary winding of the transformer and the positive electrode of the plasma generator.

[0018] 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:

[0019] Determining the working mode of the streamer sterilization device;

[0020] According to the working mode, the output voltage of the power driving circuit is adjusted based on the duty cycle of the PWM signal and / or the pulse frequency of the pulse signal.

[0021] In some embodiments, adjusting the output voltage of the power driving circuit according to the working mode based on the duty cycle of the PWM signal and / or the pulse frequency of the pulse signal includes:

[0022] When the working mode is the first working mode, reducing the duty cycle of the PWM signal and increasing the pulse frequency of the pulse signal;

[0023] When the working mode is the second working mode, increasing the duty cycle of the PWM signal and reducing the pulse frequency of the pulse signal;

[0024] The power consumption of the streamer sterilization device when operating in the first operating mode is lower than the power consumption of the streamer sterilization device when operating in the second operating mode.

[0025] In some embodiments, determining the working mode of the streamer sterilization device includes:

[0026] Based on the photosensitive sensor, the light intensity detection data of the environment where the streamer sterilization device is located is obtained;

[0027] If the light intensity detection data is greater than or equal to a preset threshold, determining that the working mode of the streamer sterilization device is the first working mode;

[0028] If the light intensity detection data is less than the preset threshold, it is determined that the working mode of the streamer sterilization device is the second working mode.

[0029] 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.

[0030] 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.

[0031] In some embodiments, the electronic device is an air conditioner.

[0032] 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.

[0033] The technical solution provided by the embodiment of the present application is that the streamer sterilization device includes: a power drive circuit and a plasma generator that works based on the drive power output by the power drive circuit; the power drive circuit includes: a high-voltage square wave circuit that outputs a first high-voltage square wave signal based on a pulse width modulation PWM signal and a high-voltage narrow pulse circuit that outputs a high-voltage narrow pulse signal based on a pulse signal; wherein the first high-voltage square wave signal output by the high-voltage square wave circuit is superimposed with the high-voltage narrow pulse signal output by the high-voltage narrow pulse circuit to supply power to the plasma generator. In this way, the average conduction voltage between the positive electrode and the negative electrode of the plasma generator can be reduced by adjusting the PWM signal and / or the pulse signal, thereby reducing the working power consumption of the streamer sterilization device. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the structure of the streamer sterilization device according to an embodiment of the present application;

[0035] Figure 2 is a schematic diagram of a curve of a square wave signal between a positive electrode and a negative electrode in the related art;

[0036] Figure 3 This is a circuit diagram of the streamer sterilization device according to an embodiment of the present application;

[0037] Figure 4 This is a circuit diagram of a streamer sterilization device in an application example of the present application;

[0038] Figure 5 A curve diagram of a PWM signal in an application example of the present application;

[0039] Figure 6 This is a curve diagram of a square wave signal superimposed on a single high-voltage narrow pulse signal in an application example of the present application;

[0040] Figure 7 This is a curve diagram of a square wave signal superimposed with multiple high-voltage narrow pulse signals in an application example of the present application;

[0041] Figure 8 This is a flow chart of a control method of a streamer sterilization device according to an embodiment of the present application;

[0042] Fig. 9 It is a flow chart of a control method of a streamer sterilization device in an application example of the present application. DETAILED DESCRIPTION

[0043] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0044] 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.

[0045] The present application embodiment provides a streamer sterilization device, such as Figure 1 As shown, the streamer sterilization device includes: a power drive circuit and a plasma generator that works based on the drive power output by the power drive circuit.

[0046] 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.

[0047] It can be understood that the plasma generator includes a positive electrode and a negative electrode arranged at intervals, and the air between the positive electrode and the negative electrode can be broken down under the action of the high voltage electricity output by the power drive circuit, so that the current flows from the positive electrode to the negative electrode.

[0048] However, the current streamer sterilization device needs to be driven by a high-voltage square wave, and the high-voltage square wave output needs to be maintained for a certain period of time between the positive electrode and the negative electrode. For example, the curve of the square wave signal 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 voltage U. Figure 2 It can be known that the plasma generator needs to provide a long-term high voltage output for driving during discharge.

[0049] It can be seen that when the current streamer sterilization device is working, it needs to output a high voltage between the positive electrode and the negative electrode of the plasma generator, and it needs to be maintained for a period of time. Therefore, the working power consumption of the streamer sterilization device is relatively high.

[0050] Based on this, an embodiment of the present application provides a streamer sterilization device that can effectively reduce operating power consumption.

[0051] like Figure 3 As shown, the streamer sterilization device of the embodiment of the present application includes: a power drive circuit and a plasma generator that works based on the drive power output by the power drive circuit;

[0052] The power drive circuit includes: a high-voltage square wave circuit that outputs a first high-voltage square wave signal based on a PWM signal and a high-voltage narrow pulse circuit that outputs a high-voltage narrow pulse signal based on a pulse signal;

[0053] The first high-voltage square wave signal output by the high-voltage square wave circuit is superimposed on the high-voltage narrow pulse signal output by the high-voltage narrow pulse circuit to supply power to the plasma generator.

[0054] It can be understood that in the embodiment of the present application, the first high-voltage square wave signal is output based on the PWM signal, and the high-voltage narrow pulse signal is output based on the pulse signal. Among them, based on the duty cycle adjustment of the PWM signal, the output voltage of the first high-voltage square wave signal output by the high-voltage square wave circuit can be adjusted, and based on the pulse frequency adjustment of the pulse signal, the number of high-voltage narrow pulse signals output by the high-voltage narrow pulse circuit can be adjusted. In this way, based on the adjustment of the PWM signal and / or the pulse signal, the magnitude of the conduction voltage between the positive electrode and the negative electrode of the plasma generator can be reduced, and the working power consumption of the streamer sterilization device can be effectively reduced.

[0055] Here, the first high-voltage square wave signal may be a signal that periodically outputs a high level and a low level, and the high level is greater than a certain voltage value. Exemplarily, the voltage value at the high level of the first high-voltage square wave signal may be 1KV to 5KV. The high-voltage narrow pulse signal may be a pulse signal with a higher output voltage and a shorter duration. Exemplarily, the voltage value of the high-voltage narrow pulse signal may be 10KV or more, and the duration of the high-voltage narrow pulse may be 1ns to 10ns.

[0056] It is understandable that the duration of the high-voltage narrow pulse signal is much shorter than the period of the first high-voltage square wave signal. Therefore, within one period, the first high-voltage square wave signal can be superimposed with a single high-voltage narrow pulse signal or multiple high-voltage narrow pulse signals.

[0057] In an embodiment of the present application, the first high-voltage square wave signal output by the high-voltage square wave circuit is superimposed with the high-voltage narrow pulse signal output by the high-voltage narrow pulse circuit and then powered to the plasma generator, so that the superimposed signal has a higher voltage output, thereby providing a higher voltage to the plasma generator, thereby causing the ionized air of the plasma generator to produce more free radicals and highly oxidizing molecules and other bactericidal factors during the time period of the pulse signal.

[0058] It is understandable that the superimposed signal supplies power to the plasma generator, so that the plasma generator generates more sterilization factors in one cycle. Therefore, the output voltage of the first high-voltage square wave signal can be reduced, and the part of the sterilization factor reduced due to the output voltage can be supplemented by the sterilization factor generated more during the time period of the pulse signal.

[0059] Here, after reducing the output voltage of the first high-voltage square wave signal, the number of sterilization factors generated by the streamer sterilization device does not decrease compared to the number of sterilization factors generated by driving the output only by the high-voltage square wave signal without reducing the output voltage, so the sterilization effect does not decrease, and because the output voltage of the first high-voltage square wave signal is reduced, the average conduction voltage between the positive electrode and the negative electrode of the plasma generator in one cycle is reduced, thereby reducing power consumption. In this way, without changing the first high-voltage square wave signal and the period and duty cycle, the working power consumption of the streamer sterilization device can be reduced by superimposing a high-voltage narrow pulse signal and reducing the output voltage of the first high-voltage square wave signal.

[0060] Exemplarily, the high voltage square wave circuit comprises:

[0061] A transformer, the transformer comprising a first secondary winding; the first high-voltage square wave signal is obtained by boosting the low-voltage side power supply through the first secondary winding of the transformer;

[0062] A microcontroller is provided with a first port for outputting the PWM signal, and a first switch tube for conducting control based on the PWM signal is arranged on the primary winding side of the transformer.

[0063] It is understandable that in order to output the first high-voltage square wave signal based on the PWM signal, a transformer and a microcontroller can be set, and a first switch tube for conduction control based on the PWM signal is provided on the primary winding side of the transformer, and the microcontroller has a first port for outputting the PWM signal. In this way, the voltage of the first high-voltage square wave signal can be adjusted by adjusting the duty cycle of the PWM signal by the microcontroller. Exemplarily, by increasing the duty cycle of the PWM signal by the microcontroller, the voltage of the first high-voltage square wave signal output by the first secondary winding of the transformer can be increased.

[0064] Exemplarily, the transformer further includes a second secondary winding, and the high-voltage narrow pulse circuit includes:

[0065] A narrow pulse generator and a booster coil; the narrow pulse generator is connected to the second secondary winding of the transformer, and the booster coil is arranged between the narrow pulse generator and the positive electrode of the plasma generator; the low-voltage side power supply is boosted by the second secondary winding of the transformer to obtain a second high-voltage square wave signal, the narrow pulse generator generates a narrow pulse signal based on the second high-voltage square wave signal, and the narrow pulse signal is boosted by the booster coil to obtain the high-voltage narrow pulse signal;

[0066] The microcontroller also has a second port for outputting the pulse signal, and the narrow pulse generator is provided with a second switch tube for conducting control based on the pulse signal.

[0067] It is understandable that in order to output a high-voltage narrow pulse signal based on a pulse signal, a narrow pulse generator and a boost coil can be set, a second switch tube for conduction control based on the pulse signal is set on the narrow pulse generator side, and the microcontroller has a second port for outputting the pulse signal. In this way, by adjusting the pulse frequency of the pulse signal by the microcontroller, the number of high-voltage narrow pulse signals can be adjusted. Exemplarily, by increasing the pulse frequency of the pulse signal by the microcontroller, the number of high-voltage narrow pulse signals output after being boosted by the boost coil can be increased.

[0068] Here, since the pulse signal has a short conduction time and low power consumption, the high-voltage narrow pulse circuit and the high-voltage square wave circuit share a transformer.

[0069] Exemplarily, the streamer sterilization device further includes:

[0070] The voltage doubling circuit is arranged between the first secondary winding of the transformer and the positive electrode of the plasma generator.

[0071] 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 first secondary winding and the positive electrode. The voltage doubler circuit can increase the voltage V1 output by the first secondary winding. For example, assuming that the boost factor of the voltage doubler circuit is N, the voltage signal output by the voltage doubler circuit is N*V1.

[0072] 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.

[0073] Exemplarily, the plasma generator may be a dielectric barrier discharge generator for dielectric barrier discharge.

[0074] The streamer sterilization device of the embodiment of the present application is illustrated below with reference to an application example.

[0075] like Figure 4 As 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.

[0076] 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).

[0077] 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 source 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.

[0078] 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.

[0079] For example, based on the duty cycle adjustment of the PWM signal, the magnitude of the output voltage V1 of the first secondary winding of the transformer can be adjusted. Figure 5 As shown, with the PWM signal (i.e. Figure 5 As the duty cycle of the PWM signal (as shown) decreases, the output voltage V1 of the first secondary winding decreases accordingly.

[0080] Reference Figure 4 The output voltage V1 of the first 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.

[0081] The transformer also includes a second secondary winding. Figure 4 As shown, the first end of the second secondary winding is connected to the anode of the diode D5, the second end of the second secondary winding is grounded, the cathode of the diode D5 is connected to the anode of the electrolytic capacitor E1, the anode of the electrolytic capacitor E1 is also connected to the first end of the resistor R2, and the cathode of the electrolytic capacitor E1 is grounded.

[0082] Here, the second secondary winding outputs electricity to supply power to the electrolytic capacitor E1, so as to discharge the electrolytic capacitor E1 in the subsequent narrow pulse generation process. The capacity of the electrolytic capacitor E1 must meet the following requirements: within a square wave cycle with a period of T, it should be able to maintain a maximum of N conduction times, where N is the number of high-voltage narrow pulse signals that need to be superimposed.

[0083] The microcontroller controls the narrow pulse generator based on the pulse signal. Figure 4 As shown, the narrow pulse generator includes: a resistor R4, a resistor R5, an optocoupler isolation OC, a switch tube Q2 (i.e., the aforementioned second switch tube) and a capacitor C5, wherein the first end of the resistor R4 is connected to the first end of the optocoupler isolation OC, the second end of the optocoupler isolation OC is grounded, the third end of the optocoupler isolation OC is connected to the base of the switch tube Q2, the fourth end of the optocoupler isolation OC is connected to the first end of the resistor R5, the second end of the resistor R5 is connected between the first end of the resistor R2 and the anode of the electrolytic capacitor E1, the collector of the switch tube Q2 is connected to the second end of the resistor R2, the emitter of the switch tube Q2 is grounded, the switch tube Q2 is intermittently turned on based on the pulse signal output by the microcontroller, and the first end of the capacitor C5 is connected between the second end of the resistor R2 and the collector of the switch tube Q2.

[0084] It can be understood that, through the optical coupler isolation OC, the circuit where the second port of the pulse signal output by the microcontroller is located and the circuit where the switch tube Q2 is located are not directly electrically connected, but the signal is transmitted through the light-emitting diode and the phototransistor in the optical coupler isolation OC. In this way, the interference caused by the electrical connection between the microcontroller and the switch tube Q2 can be reduced.

[0085] Here, the pulse signal is output through the optocoupler isolation to control the on and off of the switch tube Q2. When the switch tube Q2 is turned from on to off, the electrolytic capacitor E1 charges the capacitor C5 through the resistor R2. The capacitance of the capacitor C5 is small, and the instantaneous narrow pulse can fully charge the capacitor C5. After that, the narrow pulse is boosted by the boost coil to become a high-voltage narrow pulse, which is superimposed on the V1*N1 voltage.

[0086] Exemplarily, based on the pulse frequency adjustment of the pulse signal, the number of high-voltage narrow pulse signals output by the booster coil can be adjusted. For example, increasing the pulse frequency of the pulse signal will increase the number of high-voltage narrow pulse signals output by the booster coil accordingly.

[0087] This application example also provides a curve diagram of a square wave signal superimposed on a single high-voltage narrow pulse signal in the above embodiment, such as Figure 6 As shown, a single high-voltage narrow pulse signal is superimposed on the square wave signal, and the platform voltage of the square wave signal is reduced. By utilizing the high voltage of the single high-voltage narrow pulse signal, during the time period when the high-voltage narrow pulse signal is superimposed, the higher voltage enables the plasma generator to produce more sterilization factors, thereby supplementing the reduction in sterilization factors caused by the reduction in the platform voltage of the square wave signal in the remaining time periods. Although the narrow pulse signal has a high voltage, its conduction time is very short. Therefore, after the high-voltage narrow pulse signal is introduced, the platform voltage of the square wave can be reduced. This lowers the average conduction voltage and plays a role in energy saving.

[0088] For example, by Figure 6 It can be seen that after the square wave signal is superimposed with a single high-voltage narrow pulse signal, the platform voltage of the square wave signal can be reduced to 4KV. Figure 5 The platform voltage (5KV) of the square wave signal without superimposed high-voltage narrow pulse signal is lower, so the working power consumption of the streamer sterilization device can be reduced under the premise of the same period and duty cycle.

[0089] This application example also provides a curve diagram of a square wave signal superimposed with multiple high-voltage narrow pulses in the above embodiment, such as Figure 7 As shown, multiple high-voltage narrow pulse signals are superimposed on the square wave signal, and the platform voltage of the square wave signal is further reduced. In this way, the high voltage of the multiple high-voltage narrow pulse signals is used to further reduce the platform voltage of the square wave signal, thereby achieving the purpose of reducing power consumption.

[0090] For example, by Figure 7 It can be seen that when the square wave signal is superimposed with 3 high-voltage narrow pulse signals, the platform voltage of the square wave signal can be reduced to 2KV, and when the square wave signal is superimposed with 4 high-voltage narrow pulse signals, the platform voltage of the square wave signal can be reduced to 1.5KV. It can be seen that the more the number of superimposed high-voltage narrow pulse signals, the lower the platform voltage of the square wave signal can be adjusted, and the more energy-saving it is. In this way, the working power consumption of the streamer sterilization device can be further reduced by increasing the number of high-voltage narrow pulse signals superimposed with the square wave signal.

[0091] The present application also provides a control method for the streamer sterilization device described in the above embodiment. Figure 8 As shown, the method includes:

[0092] Step 801, determining the working mode of the streamer sterilization device.

[0093] It is understandable that if Figure 5 As shown in the figure, the high-voltage narrow pulse signal superimposed on the square wave signal reduces the working power consumption of the streamer sterilization device, but increases the electromagnetic interference and noise generated by the streamer sterilization device. Therefore, it is necessary to first determine the working mode of the streamer sterilization device, and then determine the number of superimposed high-voltage narrow pulse signals.

[0094] Here, the working mode of the streamer sterilization device may include a low power working mode and a low noise working mode. Among them, the number of high voltage narrow pulse signals superimposed in the low power working mode is greater than the number of high voltage narrow pulse signals superimposed in the low noise working mode. Exemplarily, the number of high voltage narrow pulse signals superimposed in the low power working mode may be 1, and the number of high voltage narrow pulse signals superimposed in the low power working mode may be more than 2.

[0095] Exemplarily, the control method further includes:

[0096] Step 802: According to the working mode, based on the duty cycle of the PWM signal and / or the pulse frequency of the pulse signal, adjust the output voltage of the power driving circuit.

[0097] It is understandable that if Figure 3 As shown, after the working mode of the streamer sterilization device is determined, the platform voltage of the square wave signal can be controlled by the PWM signal output by the first port of the microcontroller, and the pulse frequency of the high-voltage narrow pulse signal can be controlled by the pulse signal output by the second port of the microcontroller.

[0098] Exemplarily, adjusting the output voltage of the power drive circuit according to the working mode based on the duty cycle of the PWM signal and / or the pulse frequency of the pulse signal includes:

[0099] When the working mode is the first working mode, reducing the duty cycle of the PWM signal and increasing the pulse frequency of the pulse signal;

[0100] When the working mode is the second working mode, increasing the duty cycle of the PWM signal and reducing the pulse frequency of the pulse signal;

[0101] The power consumption of the streamer sterilization device when operating in the first operating mode is lower than the power consumption of the streamer sterilization device when operating in the second operating mode.

[0102] It is understandable that when the working mode of the streamer sterilization device is determined to be the first working mode, the duty cycle of the PWM signal can be reduced and the pulse frequency of the pulse signal can be increased to reduce the working power consumption of the streamer sterilization device. When the working mode of the streamer sterilization device is determined to be the second working mode, the duty cycle of the PWM signal can be increased and the pulse frequency of the pulse signal can be reduced to reduce the working noise of the streamer sterilization device. In this way, by determining the current working mode of the streamer sterilization device, the duty cycle adjustment of the PWM signal and the pulse frequency of the pulse signal can be reasonably set to meet the user needs in different working modes and improve the user experience.

[0103] Here, the first working mode may be the aforementioned low power consumption working mode, and the second working mode may be the aforementioned low noise working mode.

[0104] Exemplarily, determining the working mode of the streamer sterilization device includes:

[0105] Based on the photosensitive sensor, the light intensity detection data of the environment where the streamer sterilization device is located is obtained;

[0106] If the light intensity detection data is greater than or equal to a preset threshold, determining that the working mode of the streamer sterilization device is the first working mode;

[0107] If the light intensity detection data is less than the preset threshold, it is determined that the working mode of the streamer sterilization device is the second working mode.

[0108] 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. For example, when it is determined that the current light intensity is strong and the time state is daytime, the first working mode is run to reduce the working power consumption of the streamer sterilization device, or when it is determined that the current light intensity is weak and the time state is nighttime, the second working mode is run to reduce the noise emitted by the streamer sterilization device during operation, thereby reducing the impact of the streamer sterilization device on the user and improving the user experience.

[0109] Here, the preset threshold value may be a preset value or a value set by the user.

[0110] Here, the working mode of the streamer sterilization device can also be set by the user to meet the user's actual needs and improve the user experience.

[0111] The control method of the streamer sterilization device in the embodiment of the present application is illustrated below with reference to an application example.

[0112] like Fig. 9 As shown, in this application example, the control method of the streamer sterilization device includes:

[0113] Step 901, based on the PWM signal, the first switch tube is controlled to be on and off, so that the voltage V1 output by the transformer is variable, and V1 is amplified by the voltage doubling circuit to output a voltage of V1*N1.

[0114] Here, based on the duty cycle adjustment of the PWM signal, the magnitude of the output voltage V1 of the transformer can be adjusted.

[0115] Step 902, based on the pulse signal, the second switch tube is controlled to be turned on and off. At the moment of turning on and off, the small capacitor is charged and discharged to generate a narrow pulse signal. After passing through the boost coil, a high-voltage narrow pulse signal is generated, which is superimposed on the V1*N1 voltage and then supplied to the plasma generator.

[0116] Here, based on the pulse frequency adjustment of the pulse signal, the number of high-voltage narrow pulse signals generated by the boost coil can be adjusted.

[0117] Step 903, determine whether to switch to low power consumption working mode, if yes, go to step 904, if no, go to step 905.

[0118] Here, whether to switch to the low power consumption working mode is determined based on user needs.

[0119] Step 904, reducing the PWM duty cycle and increasing the pulse frequency of the pulse signal.

[0120] Here, by reducing the PWM duty cycle, lowering the voltage V1 output by the transformer, increasing the pulse frequency of the pulse signal, and increasing the number of high-voltage narrow pulse signals, the average voltage of the superimposed signal is reduced, thereby reducing the working power consumption of the streamer sterilization device.

[0121] Step 905 , determining whether to switch to the low noise working mode, if yes, go to step 906 , if no, go to step 901 .

[0122] Here, by increasing the PWM duty cycle, increasing the voltage V1 output by the transformer, and reducing the pulse frequency of the pulse signal, the number of high-voltage narrow pulse signals is reduced, thereby reducing the electromagnetic interference and working noise generated during the operation of the streamer sterilization device.

[0123] In this application example, the duty cycle adjustment based on the PWM signal and the pulse frequency adjustment of the pulse signal is used to reduce the average conduction voltage between the positive electrode and the negative electrode of the plasma generator. In this way, the working power consumption of the streamer sterilization device can be reduced while maintaining the sterilization effect of the streamer sterilization device.

[0124] 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.

[0125] The embodiment of the present application also provides an electronic device, which includes the aforementioned streamer sterilization device of 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 the working power consumption based on superimposing a high-voltage narrow pulse signal on a square wave signal without reducing the sterilization ability; in addition, based on the adjustment of the pulse frequency of the pulse signal and / or the adjustment of the duty cycle of the PWM signal, the streamer sterilization device can be controlled to switch between different working modes, which can meet various requirements such as reducing power consumption and reducing noise.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0132] 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 and a plasma generator operated based on a drive power output by the power drive circuit; The power drive circuit includes: a high-voltage square wave circuit that outputs a first high-voltage square wave signal based on a pulse width modulation (PWM) signal and a high-voltage narrow pulse circuit that outputs a high-voltage narrow pulse signal based on a pulse signal; The first high-voltage square wave signal output by the high-voltage square wave circuit is superimposed on the high-voltage narrow pulse signal output by the high-voltage narrow pulse circuit to supply power to the plasma generator.

2. The streamer sterilization device according to claim 1, characterized in that: The high voltage square wave circuit comprises: A transformer, the transformer comprising a first secondary winding; the first high-voltage square wave signal is obtained by boosting the low-voltage side power supply through the first secondary winding of the transformer; A microcontroller is provided with a first port for outputting the PWM signal, and a first switch tube for conducting control based on the PWM signal is arranged on the primary winding side of the transformer.

3. The streamer sterilization device according to claim 2, characterized in that: The transformer further includes a second secondary winding, and the high-voltage narrow pulse circuit includes: A narrow pulse generator and a booster coil; the narrow pulse generator is connected to the second secondary winding of the transformer, and the booster coil is arranged between the narrow pulse generator and the positive electrode of the plasma generator; the low-voltage side power supply is boosted by the second secondary winding of the transformer to obtain a second high-voltage square wave signal, the narrow pulse generator generates a narrow pulse signal based on the second high-voltage square wave signal, and the narrow pulse signal is boosted by the booster coil to obtain the high-voltage narrow pulse signal; The microcontroller also has a second port for outputting the pulse signal, and the narrow pulse generator is provided with a second switch tube for conducting control based on the pulse signal.

4. The streamer sterilization device according to claim 2, characterized in that: The streamer sterilization device also includes: The voltage doubling circuit is arranged between the first secondary winding of the transformer and the positive electrode of the plasma generator.

5. A control method for the streamer sterilization device according to any one of claims 1 to 4, characterized in that: include: Determining the working mode of the streamer sterilization device; According to the working mode, the output voltage of the power driving circuit is adjusted based on the duty cycle of the PWM signal and / or the pulse frequency of the pulse signal.

6. The method according to claim 5, characterized in that The step of adjusting the output voltage of the power drive circuit according to the working mode based on the duty cycle of the PWM signal and / or the pulse frequency of the pulse signal includes: When the working mode is the first working mode, reducing the duty cycle of the PWM signal and increasing the pulse frequency of the pulse signal; When the working mode is the second working mode, increasing the duty cycle of the PWM signal and reducing the pulse frequency of the pulse signal; The power consumption of the streamer sterilization device when operating in the first operating mode is lower than the power consumption of the streamer sterilization device when operating in the second operating mode.

7. The method according to claim 6, 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; If the light intensity detection data is greater than or equal to a preset threshold, determining that the working mode of the streamer sterilization device is the first working mode; If the light intensity detection data is less than the preset threshold, it is determined that the working mode of the streamer sterilization device is the second working mode.

8. A streamer sterilization device as claimed in any one of claims 1 to 4, characterized in that: The microcontroller is configured to perform the method according to any one of claims 5 to 7.

9. An electronic device, characterized in that: include: The streamer sterilization device as claimed in claim 8.

10. The electronic device according to claim 9, characterized in that: The electronic device is an air conditioner.

11. 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 5 to 7 are implemented.

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