A dual electrode plasma processing apparatus and method

Abstract

The application discloses a kind of double electrode plasma processing device and method, device includes plasma generation structure and control system, plasma generation structure uses dielectric barrier discharge structure, the material of two electrode metal sheets of dielectric barrier discharge structure is different and is distributed in up and down in jar body, and the plasma generated by the material of two electrode metal sheets is used for disinfecting and deodorizing respectively;Control system is used for the distance feedback monitored according to infrared sensor, so that the distance of electrode metal sheet and liquid surface is maintained in fixed range, and the spacing between two electrode metal sheets is maintained in fixed range, atomizer is contacted with liquid surface;The excitation power supply of plasma generation structure automatically switches the polarity of output end according to the overturning state of jar body.The application integrates disinfecting and deodorizing functions, flexible switching of two working modes, simple control, easy operation, greatly improves the practicability and multifunctionality of plasma technology.

Description

Technical Field

[0001] The present invention belongs to the field of plasma technology and relates to a dual-electrode plasma processing device and method. Background Art

[0002] As living standards improve, people's demands for improved hygiene and air quality in their living environments are becoming increasingly stringent. Pathogens and odors have long plagued our daily lives. Traditional sterilization and deodorization methods, such as chemical disinfectants and activated carbon adsorption, suffer from limited effectiveness and are prone to secondary contamination. Therefore, the development of efficient, environmentally friendly, and convenient sterilization and deodorization technologies has become an urgent challenge.

[0003] Plasma technology, due to its high efficiency, environmental friendliness, and wide applicability, holds broad application prospects in areas such as sterilization and odor removal. Plasma is a highly reactive, quasi-neutral ionized gas composed of electrons, ions, atoms, molecules, and free radicals, formed by the ionization of gases under an applied electric field. The material used in the high-voltage electrodes of a plasma generator significantly influences the composition of the plasma's active components, thus aligning with different application scenarios. For example, using metal materials such as copper or silver as high-voltage electrodes results in more intense ionization and excitation processes, generating a large number of active species such as high-energy electrons, reactive oxygen species (O), ozone (O3), and hydroxyl radicals (OH). These active species can directly damage the cell membranes and protein structures of microorganisms such as bacteria, viruses, and fungi, rapidly inactivating them and achieving highly effective sterilization. Furthermore, titanium / platinum precious metal alloys are less susceptible to oxidation and corrosion when used as high-voltage electrodes. Alloying these materials allows for long-term, stable operation in highly oxidizing environments.

[0004] Currently, plasma processing devices primarily use a single-electrode mode, primarily suitable for a single scenario. However, when faced with complex scenarios and multifunctional requirements, switching between different modes is difficult, reducing ease of use and limiting the application scope of plasma technology. This poses limitations for certain complex application scenarios. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a dual-electrode plasma treatment device that integrates disinfection and deodorization functions, has flexible switching between two working modes, simple control, and easy operation, which greatly improves the practicality and versatility of plasma technology and solves the problems existing in the prior art.

[0006] Another object of the present invention is to provide a method for operating a dual-electrode plasma processing device.

[0007] The technical solution adopted by the present invention is a dual-electrode plasma treatment device, including a plasma generating structure and a control system. The plasma generating structure adopts a dielectric barrier discharge structure. The two electrode metal plates of the dielectric barrier discharge structure are made of different materials and are distributed up and down within a tank body. The plasma generated by the materials of the two electrode metal plates is used for disinfection and deodorization, respectively. A liquid carrier is stored between the two electrode metal plates. An air layer exists between the electrode metal plates located above the liquid surface and the liquid surface. An atomizer is installed on the side wall of the tank body. Electromagnetic adsorption plates are installed on the opposite sides of the two electrode metal plates. Two electromagnets are installed at the top and bottom ends of the tank body for respectively adsorbing the two electromagnet adsorption plates away from each other.

[0008] Infrared sensors are installed at the top and bottom of the tank body. The infrared sensor at the top is used to monitor the distance between the electrode metal plate near the top and the top of the tank body, and the distance between the electrode metal plate near the top and the liquid surface; the infrared sensor at the bottom is used to monitor the distance between the electrode metal plate near the bottom and the bottom of the tank body.

[0009] The control system is used to adjust the magnetic force of the two electromagnets based on the distance feedback monitored by the infrared sensor, thereby adjusting the relative position of the two electrode metal plates, so that the distance between the electrode metal plates and the liquid surface is maintained within a fixed range, and the spacing between the two electrode metal plates is maintained within a fixed range, and the atomizer is in contact with the liquid surface;

[0010] The excitation power supply of the plasma generating structure adopts a bipolar output, which is used to automatically switch the polarity of the output end according to the flipping state of the tank body.

[0011] Furthermore, an insulating telescopic connecting rod is fixedly connected between the two electrode metal plates. The insulating telescopic connecting rod is perpendicular to the electrode metal plates. An insulating spring is sleeved on the outside of the insulating telescopic connecting rod. Both ends of the insulating spring are respectively connected to the two electrode metal plates.

[0012] Furthermore, the two electrode metal plates are slidingly and sealingly connected to the inner wall of the tank, the insulating telescopic connecting rod is sealingly connected to the two electrode metal plates, and the atomizer side wall is sealed to the inner wall of the tank, providing a closed storage space for the liquid carrier.

[0013] Furthermore, the electrode metal plate located above the liquid surface is connected to the high voltage end of the excitation power supply.

[0014] Furthermore, the control system includes a signal processing unit and a main controller. The signal processing unit is used to preliminarily process the distance information monitored by the infrared sensor; the main controller dynamically adjusts the magnetic force of the electromagnet by controlling the voltage intensity or current value of the electromagnet located above based on the real-time feedback of the distance monitored by the infrared sensor, thereby accurately controlling the stretching degree of the insulating spring, and then adjusting the relative position of the two electrode metal plates to achieve dynamic adjustment of the electrode position.

[0015] Furthermore, the distance between the two electrode metal plates is 2-5 cm.

[0016] Furthermore, the excitation power supply includes a high-speed electronic switch and a polarity reversal circuit. The high-speed electronic switch is used to quickly switch high voltage. The control system of the power supply is connected to the attitude sensor module. The attitude sensor module is used to detect the flipping state of the tank in real time and send it to the polarity reversal circuit. The polarity reversal circuit automatically switches the polarity of the output end according to the flipping state of the tank.

[0017] Furthermore, the two electrode metal plates are of a flat plate-tip structure, with tiny tip protrusions on the surface, and the height of the protrusions is 50-100 microns.

[0018] Furthermore, the upper electrode metal plate is located between one-third and one-fifth of the upper part of the tank body, so that the distance between the two electrode metal plates does not exceed the elastic deformation range of the spring, thereby keeping the lower electrode metal plate below the atomizer, and thus making the atomizer contact with the liquid surface.

[0019] A method for operating a dual-electrode plasma processing device comprises the following steps:

[0020] According to the application scenario, it is determined whether to turn on the disinfection mode or the deodorization mode; disinfection mode: flip the device upside down so that the electrode metal plate suitable for disinfection is on the top; deodorization mode: flip the device upside down so that the electrode metal plate suitable for deodorization is on the top;

[0021] High voltage output polarity automatic switching:

[0022] The control system sends a control signal to the relay module according to the switched working mode; the relay switches the connection relationship between the high-voltage output terminal and the two electrode metal plates according to the control signal, ensuring that the high voltage is always applied to the electrode metal plate located at the top;

[0023] Position adjustment of electrode metal plate:

[0024] The control system reads the distance signals from the two infrared sensors and determines the initial positions of the two electrode metal plates. Based on the preset target position, it calculates the distance and direction each electrode metal plate needs to move, outputs a PWM signal, and controls the energization duty cycle of the two electromagnets, generating an electromagnetic attraction that is proportional to the distance the electrode metal plates move and inversely proportional to the movement speed, causing the two electrode metal plates to move toward the target positions until the infrared sensor detects that the electrode metal plates have reached the target position.

[0025] Automatic positioning of electrode metal plates:

[0026] During the discharge process, the control system reads the distance signals of the two infrared sensors in real time and calculates the deviation between the actual value and the target value of the electrode metal plate position; the position deviation is used as the input of the algorithm to calculate the output electromagnet control signal to achieve closed-loop control of the electrode metal plate position; at the same time, the control system uses the voltage and current signals output by the power supply as feedback to adjust the output parameters of the power supply to achieve dynamic constant control of the plasma intensity; the control system automatically stops the discharge according to the preset time or treatment dose to complete a treatment process.

[0027] The beneficial effects of the present invention are:

[0028] (1) Dual-electrode metal plate switching: This invention utilizes a unique flip-up dual-mode switching design. By turning the device upside down, it can switch to different combinations of high-electrode discharge materials, allowing the system to operate flexibly in two different working modes: disinfection and deodorization. By cleverly utilizing the differences in electrode materials, simple and fast switching between the two modes is achieved, greatly improving the practicality and versatility of the device.

[0029] (2) Dynamically control the distance between the electrode metal plates and the water surface: By adding infrared sensors to the upper and lower ends of the device, the distance between the two electrode metal plates and the top of the tank body is measured in real time, and the connection between the two electrode metal plates is changed to an insulating spring. The system can automatically adjust the electrode spacing according to the flipping state, always maintaining the optimal discharge distance, ensuring that the current can stably break through the air and achieve normal discharge. At the same time, the electromagnet at the high electrode end is energized to ensure that the two electrode structures are always at the top after flipping, and by fixing the size of the electromagnets at each pole, the liquid (water) surface between the electrodes is always higher than the atomizer, achieving stable spraying. These meticulous structural designs ensure the stability and reliability of the device at any angle, while also simplifying the user's operation and improving the user experience.

[0030] (3) Environmentally friendly, safe, and residue-free: Compared to traditional chemical sprays, this invention utilizes clean plasma technology for disinfection and odor removal, leaving no chemical residue and being more environmentally friendly and safe. The high-energy particles generated by the plasma can oxidize and decompose bacteria, viruses, and odor molecules in a very short time, achieving rapid, efficient, and non-toxic cleaning.

[0031] In summary, this invention automatically switches the electrode material and polarity of the plasma generator by transposing the plasma-activated water generator tank, enabling the generator to controllably generate two operating modes and their active components, respectively suitable for typical applications such as sterilization and deodorization. This technology is expected to promote innovative applications of plasma technology in areas such as household appliances, medical disinfection, and air purification, providing more efficient, environmentally friendly, and economical solutions to address microbial contamination and air quality issues. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 It is a structural diagram of an embodiment of the present invention.

[0034] Figure 2 These are six views of an application example of an embodiment of the present invention.

[0035] Figure 3 Schematic diagram of the structure of the attitude sensor module and the variable current source module in an embodiment of the present invention.

[0036] Figure 4 It is a perspective view of an application example of an embodiment of the present invention.

[0037] Figure 5 It is a workflow diagram of an embodiment of the present invention.

[0038] In the figure, 1. first infrared sensor, 6. second infrared sensor, 2. first electrode metal plate, 5. second electrode metal plate, 3. insulating spring, 4. insulating telescopic connecting rod, 7. first electromagnet, 11. second electromagnet, 8. first electromagnet adsorption plate, 10. second electromagnet adsorption plate, 9. atomizer. DETAILED DESCRIPTION

[0039] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] Example 1,

[0041] A dual-electrode plasma processing device comprises a plasma generating structure, an electromagnet control module, a posture sensor module, a variable power supply module and related circuits.

[0042] like Figure 1 As shown, the plasma generation structure adopts a dielectric barrier discharge structure. A first electrode metal plate 2 and a second electrode metal plate 5 are arranged vertically within the tank. The first and second electrode metal plates 2 and 5 are made of different materials. Water, serving as a liquid carrier, is stored between the first and second electrode metal plates 2 and 5. The first and second electrode metal plates 2 and 5, as well as the air layer between the electrodes and the water surface, form the dielectric barrier discharge structure. Plasma is generated in the air layer between the electrodes (the first and second electrode metal plates 2 and 5) and the water surface.

[0043] like Figure 1 In the working state shown, the first electrode metal plate 2 is connected to the high voltage electrode, and the second electrode metal plate 5 is the ground electrode; after the tank body is turned upside down, the second electrode metal plate 5 is connected to the high voltage electrode, and the first electrode metal plate 2 is the ground electrode.

[0044] In some embodiments, the first and second electrode metal plates 2 and 5 preferably have a flat-plate-tip structure made of different materials to enhance the electric field strength and discharge effect. Specifically, the upper electrode (first electrode metal plate 2) is a flat plate electrode or a metal tip electrode (in the shape of a needle or coil spring). The tip protrusions concentrate the electric field lines, facilitating ionization discharge and promoting plasma generation. The lower electrode (second electrode metal plate 5) is a titanium / platinum precious metal alloy flat plate electrode in a flat or grid-like shape, increasing the surface area and improving discharge efficiency. The surfaces of the first and second electrode metal plates 2 and 5 are precision machined to produce a large number of tiny tip protrusions (50-100 microns in height). The tip protrusions facilitate electric field concentration, lower the discharge threshold, and improve plasma generation efficiency.

[0045] Due to the special structure of the columnar plasma generator, to ensure that it can discharge smoothly, the highest water level needs to be lower than the highest point of the plasma generator's ground electrode (that is, the tank is not full of water), ensuring that part of the plasma generator can be in contact with the air.

[0046] The electromagnet control module includes a first electromagnet 7 and a second electromagnet 11, located at the top and bottom ends of the tank (at the top and bottom, respectively). A first electromagnet attraction plate 8 and a second electromagnet attraction plate 10 are mounted on opposite sides of the first and second electrode plates 2 and 5, respectively. When energized, the first electromagnet 7 attracts the first electromagnet attraction plate 8, causing the first electrode plate 2 to move away from the second electrode plate 5. When energized, the second electromagnet 11 attracts the second electromagnet attraction plate 10, causing the second electrode plate 5 to move away from the first electrode plate 2. The first and second electromagnets 7 and 11 are designed with high-performance permanent magnet materials and precision coils, allowing precise control of magnetic force by adjusting the input current. The electromagnet model is HMF-2520, with a rated power of 10W. The first and second electromagnet attraction plates 8 and 10 can be made of soft magnetic materials with good magnetic conductivity, such as pure iron or silicon steel. The magnetic pole surface of the electromagnet is aligned parallel to the surface of the adsorption plate (the first electromagnet adsorption plate 8 and the second electromagnet adsorption plate 10 ), and they are directly adsorbed together using magnetic force.

[0047] A first infrared sensor 1 and a second infrared sensor 6 are mounted at the top and bottom of the tank, respectively, to monitor the electrode position and its distance from the water surface in real time. In this embodiment, the first and second infrared sensors 1 and 6 are fixed to the top and bottom of the tank, flush with the inner wall. They precisely measure the distance from the electrode to the end of the tank (the electromagnet) by emitting and receiving infrared light. The first infrared sensor 1 measures the distance from the first electrode metal plate 2 near the top to the top of the tank, as well as the distance from the first electrode metal plate 2 near the top to the water surface. The second infrared sensor 6 monitors the distance from the second electrode metal plate 5 near the bottom to the bottom of the tank.

[0048] In some embodiments, the first and second infrared sensors 1 and 6 are SHARPGP2Y0A21YK0F models, featuring high precision, waterproof performance, and stable operation in humid environments. They continuously monitor electrode position, quickly capturing position changes, particularly during device flipping. The first and second infrared sensors 1 and 6 also feature temperature compensation and anti-interference features to ensure measurement accuracy in diverse environments.

[0049] The insulating spring 3 and the insulating telescopic link 4 are used to adjust the electrode spacing and maintain electrode position. The insulating spring 3 is made of a high-strength, high-pressure-resistant elastic material (e.g., rubber or resin) with excellent insulation and aging resistance. The insulating spring 3 connects the upper and lower electrodes (the first electrode metal plate 2 and the second electrode metal plate 5) and adjusts the electrode spacing through elastic deformation. The insulating telescopic link 4 is made of a high-pressure-resistant insulating material and is connected to the electrodes at both ends. It can be extended and retracted vertically to coordinate the electrode position and provide horizontal support. The insulating telescopic link 4 is used to secure the insulating spring 3, enhancing its flexibility. A fixed-axis spring can be used.

[0050] The output ends of the first infrared sensor 1 and the second infrared sensor 6 are connected to a control system, which includes a signal processing unit and a main controller. The measurement data is initially processed by the signal processing unit and then transmitted to the main controller as input for feedback control. The main controller uses a 16-bit MCU with an MSP430G2553 as the main control chip. Based on real-time feedback from the infrared sensor monitoring distance, the main controller dynamically adjusts the magnetic force of the first electromagnet 7 and the second electromagnet 11 by controlling the voltage intensity (or current value) passed to the first electromagnet 7 and the second electromagnet 11. According to the spring elastic deformation length formula F=KL (F represents the magnetic force, K represents the elastic coefficient of the insulating spring 3, and L represents the stretched length of the insulating spring 3), the stretched length of the insulating spring 3 is precisely controlled, and the relative position of the first electrode metal plate 2 and the second electrode metal plate 5 is adjusted to achieve dynamic adjustment of the electrode position and realize closed-loop control.

[0051] The variable power supply module serves as the excitation power source for the plasma generating structure. It is connected to the first and second electrode metal plates 2 and 5. The excitation power supply utilizes a bipolar output design, automatically adjusting its output polarity based on the device's operating mode (upside-down or flip-up), enabling flexible switching between the high-voltage and ground terminals of the electrodes. The excitation power supply includes a high-speed electronic switch and a polarity reversal circuit. The high-speed electronic switch is a well-known component capable of rapidly switching high voltages. The excitation power supply's control system is connected to a posture sensor module, which detects the tank's flipping state in real time and transmits this information to the polarity reversal circuit. The polarity reversal circuit automatically switches the output polarity based on this information, alternating between the high and low voltage terminals. This switching is accomplished in milliseconds. The posture sensor module is mounted outside the tank, next to the power supply, and is compact. The power supply also features overcurrent, overvoltage, and short-circuit protection, ensuring safety during electrode switching.

[0052] When the device is powered on, a strong electric field forms between the high-voltage and low-voltage electrodes. When the voltage exceeds a certain threshold and the electrode spacing is 2-5 cm, the electric field strength reaches the breakdown voltage of air, ionizing the air between the electrodes and generating plasma. The plasma jet is ejected outward from the electrode gap, passing through the atomizer 9 and contacting the water surface, forming a mist of charged particles.

[0053] Assume that in the initial state, first electromagnet 7 is energized and second electromagnet 11 is de-energized. First electrode metal plate 2, along with first electromagnet attraction plate 8, is attracted to the top of the tank by first electromagnet 7. First electrode metal plate 2 is connected to the high-voltage terminal of the excitation power supply, acting as a high-voltage electrode. Second electrode metal plate 5, due to its own weight and the tension of insulating spring 3, is located at the bottom of the tank. It is connected to the ground terminal of the excitation power supply, acting as a ground electrode.

[0054] To switch operating modes, the tank body flips 180°, energizing the second electromagnet 11 and de-energizing the first electromagnet 7. The second electromagnet 11 attracts the second electrode plate 5 and the second electromagnet attraction plate 10 to the top of the flipped tank body, making it the high-voltage electrode. The first electrode plate 2, due to its own weight and the tension of the insulating spring 3, rests on the bottom of the new tank body, becoming the ground electrode.

[0055] Throughout the entire flipping process, the first infrared sensor 1 and the second infrared sensor 6 continuously monitor the changes in the distance between the two electrode plates and the top and bottom of the tank. Based on this distance feedback, the control system adjusts the magnetic forces of the first and second electromagnets 7 and 11, and thereby adjusts the relative positions of the two electrode plates by pulling on the insulating spring 3. This ensures that the distance between the upper electrode plate and the water surface remains within a fixed range, and the spacing between the electrode plates remains within the optimal discharge range. This ensures that the distance between the high-voltage electrode and the water surface, as well as the spacing between the two electrodes, are automatically adjusted to the optimal state during the flipping process, maintaining dynamic stability and ensuring stable plasma discharge. Furthermore, by controlling the size of the electromagnets (i.e., ensuring that they fit the tank body), the upper electrode plate is positioned anywhere between one-third and one-fifth of the upper portion of the tank body. This ensures that the spacing between the two electrode plates does not exceed the elastic deformation range of the springs, thereby keeping the lower electrode plate below the atomizer 9. This ensures that the water surface maintains good contact with the atomizer 9, ensuring stable discharge of the plasma mist.

[0056] In this system, water is used as a liquid carrier and is stored in a generating tank composed of two electrode metal plates, an atomizer 9 and a tank wall. A vertical guide groove is provided on the inner wall of the tank body, and sliders are provided at the edges of the two electrode metal plates to match the guide grooves. The electrode metal plates slide up and down in the guide rails through the sliders, and sealing rings are provided at both ends of the guide rail grooves to fit tightly with the outer edges of the electrode metal plates. The sealing ring material can be made of rubber or silicone with good elasticity and corrosion resistance. A certain amount of insulating grease is also filled between the electrode metal plates and the tank body, which can reduce friction on the one hand and help seal on the other.

[0057] The connection between the insulating telescopic connecting rod 4 and the electrode metal plate is sealed by an O-ring or flexible sealing gasket to prevent water leakage from the connection. In addition, elastic sealing structures, such as elastic sealing lips or sealing caps, are provided on both end surfaces of the tank body to seal the upper and lower edges of the electrode metal plate.

[0058] The electrode metal plate is guided by the guide rails and supported by the insulated telescopic link 4, enabling smooth movement of the electrode metal plate. Multiple sealing measures are implemented at the joints or gaps between the electrode metal plate and the tank body to prevent water leakage, thus satisfying the movement requirements of the electrode metal plate while providing a sealed storage space for water.

[0059] The atomizer 9 is installed in the middle of the tank body. The connection between the atomizer 9 and the tank body is fixed with threads. At the same time, a mounting groove matching the atomizer is opened on the tank body. A stepped sealing structure is designed in the groove, which fits tightly with the step of the atomizer to ensure the sealing between the side wall of the atomizer 9 and the inner wall of the tank body.

[0060] In some embodiments, the first electrode metal plate 2 is a copper / silver composite material with a nickel-plated surface for enhanced corrosion resistance; the second electrode metal plate 5 is a titanium / platinum precious metal alloy. In disinfection mode, the copper electrode releases a large number of high-energy electrons and reactive particles, such as ozone and hydrogen peroxide, which have strong oxidative and bactericidal properties. In deodorization mode, the titanium / platinum alloy electrode produces plasma dominated by low-energy electrons and a relatively low concentration of reactive particles, making it more suitable for oxidative decomposition of odor molecules.

[0061] The dual-mode switching design of this embodiment eliminates the need for electrode replacement or complex control circuitry. Simply flipping the device allows for seamless switching between operating modes, enhancing ease of operation and practicality. By flipping the device 180° (i.e., placing it upside down), the metal material at the high-voltage electrode end can be switched, allowing the system to operate in two different operating modes using different combinations of high-voltage electrode discharge materials.

[0062] The insulated elastic link 4 is linked to the electromagnet control module to dynamically control the distance between the two electrode metal plates. The variable power supply module (i.e., the excitation power supply) controls the current flowing through the electromagnet, precisely adjusting its suction force. The first infrared sensor 1 and the second infrared sensor 6, with a measurement range of approximately 2-20 cm and a resolution of 0.5 mm, measure the distance from the top to the water surface. Based on the distance measurement results, the variable power supply module automatically adjusts the current flowing through the electromagnet, dynamically controlling the position of the electrode metal plates. This maintains the distance between the electrode metal plates and the water surface, ensuring normal plasma generation.

[0063] like Figure 2-4 As shown, the handheld device of the present invention adopts an ergonomic design, a slim cylindrical shape of 20 cm long and 5 cm in diameter, and weighs only 498g, making it easy and convenient to operate with one hand. It does not require frequent refilling of water and can be used continuously for hundreds of times, making it very convenient to use.

[0064] like Figure 3 As shown, the variable power supply module uses a push-pull resonant circuit to achieve wide-range voltage and frequency adjustment functions. According to the positive posture, it is in disinfection mode, with an output of 3kV peak-to-peak voltage and a frequency of 25kHz. The negative posture is in deodorization mode, with an output of 1.5kV peak-to-peak voltage and a frequency of 40kHz.

[0065] The attitude sensor module uses a micro-electromechanical accelerometer with three-axis detection and a resolution of 0.001g. It monitors the device's tilt angle in real time and automatically switches operating modes if it exceeds 90 degrees. When switching modes, it automatically adjusts the high-voltage parameters to the corresponding set values.

[0066] The attitude sensor module, MPU-6050, and the variable power supply module, LT3757, can detect the tank's tilt in real time and automatically switch the output polarity accordingly. The variable power supply module is used to flexibly switch between high and low voltages at the electrodes.

[0067] The workflow of the embodiment of the present invention is as follows: Figure 5 As shown, when the switch is turned on, the infrared sensor detects the distance between the upper electrode metal plate and the liquid surface and sends a signal to the electromagnet control module; the electromagnet control module controls the magnetic force of the electromagnet and adjusts the distance between the electrode metal plate and the liquid surface to a preset value; the variable power supply module supplies power to the electromagnet control module.

[0068] The attitude sensor module detects the tank's posture. If it's in a positive position, a low-frequency, high-voltage input activates disinfection mode. A corrosion-resistant copper / silver composite electrode is used on the top, while a titanium / rhodium precious metal electrode is used on the bottom. A 25kHz, low-frequency AC high voltage of 3kV peak-to-peak is applied. The variable power supply module utilizes a push-pull resonant circuit for wide voltage regulation. High-energy electrons up to 10eV and a large number of reactive oxygen ions generated on the electrode surfaces mix with atomized purified water to form a highly effective disinfectant. Within 5 seconds, the spray can rapidly kill over 99.99% of bacteria and remove over 99.9% of viruses within a 20cm² area, meeting the sanitary disinfection needs of everyday items such as tableware and children's toys, far exceeding traditional chemical disinfectants. The entire device is compact, uses a low-frequency, high-voltage power input, and outputs high-energy plasma from the electrode metal plates, which mixes with the water mist and forms an atomized atomized solution, making it highly practical.

[0069] If the sprayer is in a negative position, high-frequency, low-voltage input activates deodorization mode: the upper electrode becomes a titanium / platinum electrode, and the lower becomes a copper / silver electrode. Discharge parameters are adjusted to 1.5kV and 40kHz. Ozone and other strong oxidizing substances accumulate on the electrode surfaces and mix with the atomized water. A 15-second spray can effectively remove stubborn odors like sweat and cigarette smoke from fabrics within a 10cm² area, restoring a fresh fragrance to clothing. Simply flip the sprayer 180°, and the built-in position sensor module automatically switches to deodorization mode.

[0070] This embodiment of the present invention utilizes two symmetrically arranged electrode metal plates (a first electrode metal plate 2 and a second electrode metal plate 5) made of different materials, each suitable for different operating modes. When the device is upright, the upper first electrode metal plate 2 is connected to high voltage, while the lower second electrode metal plate 5 is grounded, making it suitable for disinfection. When the device is inverted, the roles of the upper and lower electrodes are reversed, with the original second electrode metal plate 5 connected to high voltage and the original first electrode metal plate 2 grounded, making it suitable for deodorization.

[0071] During the entire flipping process, the first infrared sensor 1 and the second infrared sensor 6 continuously monitor the changes in the distance between the two electrode metal plates and the top and bottom ends of the tank body. Based on the distance feedback, the control system adjusts the magnetic force of the first electromagnet 7 and the second electromagnet 11, and then adjusts the relative position of the two electrode metal plates by pulling the insulating spring 3, so that the distance between the upper electrode metal plate and the water surface is maintained within a fixed range, and the spacing between the electrode metal plates is maintained within the optimal discharge range, thereby ensuring efficient plasma generation during spraying. At the same time, the electromagnet control module and the insulating elastic connecting rod jointly control the electrode spacing, so that the distance between the high-voltage electrode metal plate and the liquid surface is constant, and the plasma concentration is stable and controllable. The overall design ensures safe use.

[0072] The electrode materials of the present invention can be the following combinations: Stainless steel / nickel alloy: stainless steel has good corrosion resistance, and nickel alloy can improve electrical conductivity and wear resistance. Graphite / carbon nanotube composite material: graphite has good electrical conductivity, and carbon nanotubes can improve mechanical strength and specific surface area. Aluminum / titanium alloy: aluminum is light and has good electrical conductivity, and titanium alloy has excellent corrosion resistance and biocompatibility. Metal electrodes (such as copper, silver, etc.) have excellent electrical conductivity, can reduce the ohmic loss of the electrode, can generate a stronger electric field at a lower voltage, and are conducive to the generation of plasma. Titanium / platinum precious metal alloys are not easily oxidized or corroded. They are made into alloy electrodes that can work stably for a long time in a strong oxidizing environment. The combination of copper / silver composite material electrodes and titanium / platinum precious metal alloy electrodes can take into account both electrical conductivity and corrosion resistance, and extend the service life of the electrodes. The system integrates disinfection and deodorization functions and can be widely used in indoor air purification, scene disinfection, medical disinfection and other fields. Through the differential design of electrode materials and the simple operation of device flipping, the embodiment of the present invention realizes the flexible switching of the two working modes of plasma disinfection and deodorization, greatly improving the practicality and versatility of plasma technology, and has good application prospects and practical value.

[0073] The present invention utilizes a high-voltage pulse transformer and intelligent control circuit. The transformer utilizes high-quality ferrite material, achieving a high step-up ratio and high efficiency in a compact design. The control circuit employs pulse-width modulation and feedback control technology to precisely adjust the pulse amplitude, frequency, and duty cycle, ensuring consistent pulse waveforms. The electromagnet control module utilizes a fuzzy control algorithm, dynamically adjusting the control strategy based on the speed and magnitude of water level changes, ensuring rapid response and stable discharge even in the event of sudden water level changes.

[0074] Example 2,

[0075] A method for operating a dual-electrode plasma processing device comprises the following steps:

[0076] According to the application scenario, determine whether to turn on the disinfection mode or the deodorization mode; disinfection mode: flip the device upside down so that the electrode metal plate suitable for disinfection is located on the top; deodorization mode: flip the device upside down so that the electrode metal plate suitable for deodorization is located on the top.

[0077] High voltage output polarity automatic switching:

[0078] The control system sends a control signal to the relay module based on the switching operating mode. The relay, in response to the control signal, switches the connection between the high-voltage output terminal and the two electrode plates, ensuring that the high voltage is always applied to the upper electrode plate. The controller adjusts the output voltage and frequency of the power module based on preset process parameters to generate the desired plasma discharge. The variable power module monitors the output current and voltage in real time. If arcing or overcurrent is detected, it immediately shuts off the output and sends a fault signal to the controller. Upon receiving the fault signal, the controller shuts down the power output, records the fault information, and automatically attempts to restart within a specified time until the fault is resolved.

[0079] Position adjustment of electrode metal plate:

[0080] The control system reads the distance signals of the two infrared sensors and determines the initial positions of the two electrode metal plates. It calculates the distance and direction that each electrode metal plate needs to move according to the preset target position, outputs a PWM signal, controls the power-on duty cycle of the two electromagnets, and generates an electromagnetic suction force that is proportional to the moving distance of the electrode metal plate and inversely proportional to the moving speed. Under the action of the electromagnetic force and the spring force, the two electrode metal plates move toward the target position respectively until the infrared sensor detects that the electrode metal plate has reached the target position. The controller continuously monitors the position changes of the two electrode metal plates, and repeats the correction when the position deviates from the target value by more than the set threshold.

[0081] Automatic positioning of electrode metal plates:

[0082] During the discharge process, the control system reads the distance signals of the two infrared sensors in real time and calculates the deviation between the actual value and the target value of the electrode metal plate position; the position deviation is used as the input of the algorithm to calculate the output electromagnet control signal to achieve closed-loop control of the electrode metal plate position; at the same time, the control system uses the voltage and current signals output by the power supply as feedback to adjust the output parameters of the power supply to achieve dynamic constant control of the plasma intensity; the control system automatically stops the discharge according to the preset time or treatment dose to complete a treatment process.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A dual-electrode plasma processing device, comprising a plasma generating structure and a control system, wherein the plasma generating structure adopts a dielectric barrier discharge structure, characterized in that: The two electrode metal plates of the dielectric barrier discharge structure are made of different materials and are distributed up and down in the tank body. The plasma generated by the materials of the two electrode metal plates is used for disinfection and deodorization respectively. A liquid carrier is stored between the two electrode metal plates. An air layer exists between the electrode metal plates located above the liquid surface and the liquid surface. An atomizer (9) is installed on the side wall of the tank body. Electromagnetic adsorption plates are installed on the opposite sides of the two electrode metal plates. Two electromagnets are installed at the top and bottom ends of the tank body for respectively adsorbing the two electromagnet adsorption plates away from each other. Infrared sensors are installed at the top and bottom of the tank body. The infrared sensor at the top is used to monitor the distance between the electrode metal plate near the top and the top of the tank body, and the distance between the electrode metal plate near the top and the liquid surface; the infrared sensor at the bottom is used to monitor the distance between the electrode metal plate near the bottom and the bottom of the tank body. The control system is used to adjust the magnetic force of the two electromagnets according to the distance feedback monitored by the infrared sensor, thereby adjusting the relative position of the two electrode metal plates, so that the distance between the electrode metal plates and the liquid surface is maintained within a fixed range, and the spacing between the two electrode metal plates is maintained within a fixed range, and the atomizer (9) is in contact with the liquid surface; The excitation power supply of the plasma generating structure adopts a bipolar output, which is used to automatically switch the polarity of the output end according to the flipping state of the tank body.

2. A dual-electrode plasma processing device according to claim 1, characterized in that: An insulating telescopic connecting rod (4) is fixedly connected between the two electrode metal plates. The insulating telescopic connecting rod (4) is perpendicular to the electrode metal plates. An insulating spring (3) is sleeved on the outside of the insulating telescopic connecting rod (4). Both ends of the insulating spring (3) are respectively connected to the two electrode metal plates.

3. A dual-electrode plasma processing device according to claim 2, characterized in that: The two electrode metal plates are slidably and sealedly connected to the inner wall of the tank, the insulating telescopic connecting rod (4) is sealedly connected to the two electrode metal plates, and the side wall of the atomizer (9) is sealedly connected to the inner wall of the tank, providing a closed storage space for the liquid carrier.

4. A dual-electrode plasma processing device according to claim 1, characterized in that: The electrode metal plate located above the liquid surface is connected to the high voltage end of the excitation power supply.

5. The dual-electrode plasma processing device according to claim 2, characterized in that: The control system includes a signal processing unit and a main controller. The signal processing unit is used to preliminarily process the distance information monitored by the infrared sensor. The main controller dynamically adjusts the magnetic force of the electromagnet by controlling the voltage intensity or current value of the electromagnet located above according to the real-time feedback of the distance monitored by the infrared sensor, thereby accurately controlling the stretching degree of the insulating spring (3) and further adjusting the relative position of the two electrode metal plates to achieve dynamic adjustment of the electrode position.

6. The dual-electrode plasma processing device according to claim 1, characterized in that: The distance between the two electrode metal plates is 2-5 cm.

7. The dual-electrode plasma processing device according to claim 1, characterized in that: The excitation power supply includes a high-speed electronic switch and a polarity reversal circuit. The high-speed electronic switch is used to quickly switch high voltage. The control system of the power supply is connected to the attitude sensor module. The attitude sensor module is used to detect the flipping state of the tank in real time and send it to the polarity reversal circuit. The polarity reversal circuit automatically switches the polarity of the output end according to the flipping state of the tank.

8. The dual-electrode plasma processing device according to claim 1, characterized in that: The two electrode metal plates are of a flat plate-tip structure, with tiny tip protrusions on the surface, and the height of the protrusions is 50-100 microns.

9. The dual-electrode plasma processing device according to claim 2, characterized in that: The upper electrode metal plate is located between one-third and one-fifth of the upper portion of the tank body, so that the distance between the two electrode metal plates does not exceed the elastic deformation range of the spring, thereby keeping the lower electrode metal plate below the atomizer (9), thereby allowing the atomizer (9) to contact the liquid surface.

10. The operating method of a dual-electrode plasma processing device according to claim 1, characterized in that: The following steps are involved: According to the application scenario, determine whether to turn on the disinfection mode or the deodorization mode; disinfection mode: flip the device upside down so that the electrode metal plate suitable for disinfection is on the top; deodorization mode: flip the device upside down so that the electrode metal plate suitable for deodorization is on the top; High voltage output polarity automatic switching: The control system sends a control signal to the relay module according to the switched working mode; the relay switches the connection relationship between the high-voltage output terminal and the two electrode metal plates according to the control signal, ensuring that the high voltage is always applied to the electrode metal plate located at the top; Position adjustment of electrode metal plate: The control system reads the distance signals of the two infrared sensors and determines the initial positions of the two electrode metal plates; The system calculates the distance and direction each electrode plate needs to move based on the preset target position, outputs a PWM signal, and controls the duty cycle of the two electromagnets, generating an electromagnetic attraction that is proportional to the distance the electrode plate moves and inversely proportional to the speed of movement. This causes the two electrode plates to move toward the target position until the infrared sensor detects that the electrode plates have reached the target position. Automatic positioning of electrode metal plates: During the discharge process, the control system reads the distance signals of the two infrared sensors in real time and calculates the deviation between the actual value and the target value of the electrode metal plate position; the position deviation is used as the input of the algorithm to calculate the output electromagnet control signal to achieve closed-loop control of the electrode metal plate position; at the same time, the control system uses the voltage and current signals output by the power supply as feedback to adjust the output parameters of the power supply to achieve dynamic constant control of the plasma intensity; the control system automatically stops the discharge according to the preset time or treatment dose to complete a treatment process.

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