A plasma-activated spray disinfecting device

Abstract

The utility model discloses a kind of plasma activation spray disinfection devices, it includes: shell, plasma activation spray component and material conveying component being set in shell;Plasma activation spray component includes: plasma generation module, plasma atomizer being connected to plasma generation module and first spray head component being connected to plasma atomizer;First spray head component is set above material conveying component, when material is dynamically conveyed by the material transmission component, activated plasma is sprayed by the first spray head component to the material at multiple different angles during the dynamic conveying process. It disinfects using plasma activation spray mode, avoids chemical residues existing in traditional disinfection mode, safe and environmentally friendly. Spray head angle can be adjusted, so it is suitable for different disinfection scenes. In addition, the device integrates fabric disinfection, environmental disinfection, fruit and vegetable disinfection and storage function on single disinfection equipment, reduces equipment purchase cost, improves space utilization.

Description

Technical Field

[0001] This utility model relates to the field of disinfection device technology, and in particular to a plasma-activated spray disinfection device. Background Technology

[0002] Currently, disinfection devices are widely used in medical, food processing, and household environments. Common disinfection methods include ultraviolet (UV) disinfection, chemical spray disinfection, and ozone disinfection. While UV disinfection leaves no chemical residue, it has blind spots and can only disinfect directly irradiated surfaces, unable to penetrate fabrics or complex-shaped objects. Chemical spray disinfection may produce harmful residues, posing potential risks to the environment and user health, and requires extended ventilation times. Although ozone disinfection is highly efficient, high concentrations of ozone are harmful to human health.

[0003] In existing technologies, some mobile disinfection devices use a spray method, but the spray uniformity is poor, and the nozzles are usually fixed, making it impossible to adjust the coverage area, resulting in low disinfection efficiency. Furthermore, these devices often have limited functionality, only suitable for surface disinfection, and cannot address the needs of environmental disinfection and food processing. Plasma disinfection technology has developed rapidly in recent years, but most existing plasma devices use flat electrode or simple electrode structures, resulting in low discharge efficiency, unstable plasma generation, and low integration of the spray system, making it difficult to achieve multi-purpose applications.

[0004] The main reasons for these problems are insufficient plasma output due to unreasonable electrode design, lack of flexibility in the spray system, and failure to consider multi-functional integration in the device's structural design. Therefore, there is an urgent need for a highly efficient, flexible, and multi-functional mobile disinfection device to overcome these limitations. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a plasma-activated spray disinfection device to solve the technical problems of inefficiency and limited functionality of existing disinfection equipment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An embodiment of this utility model provides a plasma-activated spray disinfection device, which includes: a housing, a plasma-activated spray component and a material conveying component disposed within the housing; The plasma-activated spray assembly includes: a plasma generating module, a plasma atomizer connected to the plasma generating module, and a first nozzle assembly connected to the plasma atomizer; The first nozzle assembly is positioned above the material conveying assembly. During the dynamic conveying of the material by the material conveying assembly, the first nozzle assembly sprays activated plasma toward the material at multiple different angles.

[0007] The plasma generating module includes several helical electrodes, which are arranged in an array.

[0008] The spiral electrode includes an inner electrode rod and an outer electrode wound around the outside of the inner electrode rod. The outer surface of the inner electrode rod is provided with an insulating dielectric layer.

[0009] The housing also includes a fruit and vegetable basket, and the plasma-activated spray assembly further includes a second nozzle assembly connected to the plasma atomizer and located above the fruit and vegetable basket.

[0010] The second nozzle assembly is connected to the plasma atomizer via a second pipe, and the second pipe is provided with a second switching valve to control the opening and closing of the second pipe.

[0011] The first nozzle assembly includes at least two adjustable nozzles, which are disposed near the top of the housing. The adjustable nozzles are connected to the plasma atomizer via a first pipe, and the first pipe is also provided with a first switching valve for controlling the opening and closing of the first pipe.

[0012] The top of the housing is provided with a removable cover.

[0013] A high-pressure air pump is also provided between the plasma generating module and the plasma atomizer.

[0014] The material conveying assembly includes: a rotational power unit, a transmission belt connected to the rotational power unit, and a conveyor belt controlled by the transmission belt.

[0015] The bottom of the housing is also equipped with several casters, and the outer wall of the housing is also equipped with an electrical control box. The electrical control box is used to control the material conveying assembly and the plasma activation spray assembly to operate the disinfection process according to a preset logic.

[0016] This utility model discloses a plasma-activated spray disinfection device, which uses plasma-activated spraying for disinfection, avoiding chemical residues found in traditional disinfection methods, making it safe and environmentally friendly. The nozzle angle is adjustable, making it suitable for different disinfection scenarios. It integrates fabric disinfection, environmental disinfection, fruit and vegetable disinfection, and storage functions into a single disinfection device, reducing equipment purchase costs and improving space utilization.

[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this utility model more obvious and easy to understand, the following are preferred embodiments, which are described in detail below. Attached Figure Description

[0018] Figure 1 This is the functional module frame of the plasma-activated spray disinfection device according to an embodiment of the present utility model.

[0019] Figure 2 This is a schematic diagram of the spiral electrode portion of the plasma generating unit in the plasma-activated spray disinfection device according to an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures: 1. Housing, 11. Removable cover, 12. Casters, 21. Rotary power unit, 22. Conveyor belt, 23. Transmission belt, 31. Plasma generation module, 32. High-pressure air pump, 33. Plasma atomizer, 34. First pipe fitting, 35. Adjustable nozzle, 36. First switch valve, 37. Second nozzle, 38. Second pipe fitting, 311. Inner electrode rod, 312. Outer electrode, 313. Insulating dielectric layer, 314. Encapsulating adhesive, 4. Electrical control box, 5. Fruit and vegetable basket, 51. Drain outlet. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] Currently, disinfection devices are widely used in medical, food processing, and household environments. Common disinfection methods include ultraviolet (UV) disinfection, chemical spray disinfection, and ozone disinfection. While UV disinfection leaves no chemical residue, it has blind spots and can only disinfect surfaces, unable to penetrate fabrics or complex-shaped objects. Chemical spray disinfection may produce harmful residues, posing risks to the environment and user health, and requires extended ventilation times. Although ozone disinfection is highly efficient, high concentrations of ozone are harmful to humans, and the equipment is typically fixed in place, making it inconvenient to move.

[0029] In existing technologies, some mobile disinfection devices use a spray method, but the spray uniformity is poor, and the nozzles are usually fixed, making it impossible to adjust the coverage area, resulting in low disinfection efficiency. Furthermore, these devices often have limited functionality, only suitable for surface disinfection, and cannot address the needs of environmental disinfection and food processing. Plasma disinfection technology has developed rapidly in recent years, but most existing plasma devices use flat electrode or simple electrode structures, resulting in low discharge efficiency, unstable plasma generation, and low integration of the spray system, making it difficult to achieve multi-purpose applications.

[0030] The main reasons for these problems are insufficient plasma output due to unreasonable electrode design, lack of flexibility in the spray system, and failure to consider multi-functional integration in the device's structural design. Therefore, there is an urgent need for a highly efficient, flexible, and multi-functional mobile disinfection device to overcome these limitations.

[0031] Please see Figures 1 to 2 , Figure 1 and Figure 2 These are all functional block diagrams of the plasma-activated spray disinfection device in this embodiment.

[0032] The plasma-activated spray disinfection device includes: a housing 1, a plasma-activated spray assembly and a material conveying assembly disposed within the housing 1. The housing 1 has a disinfection installation chamber, and both the plasma-activated spray assembly and the material conveying assembly are disposed within the disinfection installation chamber. The material conveying assembly is used to transport the items to be disinfected to the front of the spray nozzle of the plasma-activated spray assembly. The plasma-activated spray assembly is used to generate plasma and spray the activated and atomized plasma onto the items to be disinfected, thereby completing the plasma disinfection treatment of the items.

[0033] In this embodiment, to avoid the drawbacks of traditional ultraviolet disinfection equipment's inability to disinfect blind spots and the potential for chemical residues in chemical spray disinfection, plasma disinfection is employed. This not only improves the disinfection effect but also enhances disinfection safety and environmental friendliness. The plasma, treated by the plasma-activated spray component, is sprayed in a mist onto the surface of the items. Combined with the material conveying component, the items being disinfected move in and out of the disinfection equipment, resulting in dynamic disinfection. This reduces blind spots and ensures no chemical residue remains inside the items after disinfection, making it safer and more environmentally friendly.

[0034] Plasma is the fourth state of matter, generated by the ionization of gas through a high-voltage electric field. It contains active components such as electrons, ions, free radicals, and excited-state molecules. Its disinfection mechanism mainly destroys microorganisms through a triple action.

[0035] First, there is physical damage: high-energy charged particles directly penetrate the cell membrane and cell wall of microorganisms, causing structural rupture.

[0036] Second, chemical oxidation: reactive oxygen species (such as ozone and hydroxyl radicals) and reactive nitrogen species react with the proteins, lipids, and nucleic acids of microorganisms, causing them to become inactive.

[0037] Thirdly, genetic material is damaged: ultraviolet radiation and charged particles destroy DNA / RNA, blocking the ability of microorganisms to reproduce. This process is completed at low temperature (close to room temperature), without the need for high temperature or chemical agents, relying on the instantaneous high-activity reaction in the plasma area to achieve efficient sterilization.

[0038] Plasma sterilization has the following advantages: Highly effective and broad-spectrum: It can kill bacteria, viruses, fungi, spores and drug-resistant strains, with an inactivation rate of usually over 99%; the active ingredients act rapidly, and disinfection takes only a few minutes.

[0039] Safe and environmentally friendly: No chemical residues, avoiding secondary pollution; no toxic byproducts (under proper operation); low-temperature operation (30–40℃), suitable for heat-sensitive materials (plastics, electronic devices, etc.).

[0040] Wide range of applications: compatible with various surface materials (metal, glass, food packaging, etc.), and can purify the air and decompose odors at the same time; suitable for medical devices, food processing, public places and home environments.

[0041] Energy-saving and economical: Energy consumption is lower than that of high-temperature sterilization, and the equipment can be miniaturized (such as a portable sterilizer). Plasma disinfection, with its high efficiency, safety and environmental friendliness, has significant potential in the medical, food and public health fields, and is especially suitable for replacing traditional chemical or high-temperature disinfection scenarios.

[0042] The plasma-activated spray assembly includes: a plasma generating module 31, a plasma atomizer 33 connected to the plasma generating module 31, and a first nozzle assembly connected to the plasma atomizer 33.

[0043] The first nozzle assembly is positioned above the material conveying assembly. During the dynamic conveying of materials by the material conveying assembly, the first nozzle assembly sprays activated plasma toward the material at multiple different angles.

[0044] The plasma generation module 31 is essentially a gas ionization process, relying on external energy to break the stability of gas molecules. Its structure mainly consists of an electrode system, a discharge chamber and a reaction chamber, a power supply and excitation system, and auxiliary systems. The electrode system includes a cathode and an anode. The cathode typically uses highly conductive, high-temperature resistant materials (such as cerium-tungsten, thorium-tungsten, or water-cooled copper electrodes) and is responsible for emitting electrons. The anode, a positively charged electrode, is often made of a high thermal conductivity metal (such as copper) and is equipped with a water-cooling system and a compressed air channel. The discharge chamber and reaction chamber compress the electric arc into a narrow channel through physical constraints, tangential airflow rotation, or magnetic field clamping effects. The power supply and excitation system mainly includes a DC power supply and a high-frequency / radio frequency power supply, primarily powering the electrodes to ionize the gas. The auxiliary systems mainly include a cooling system, a gas supply system, and a control unit.

[0045] Please refer to it again. Figure 2 The plasma generating module 31 includes a plurality of spiral electrodes, which are arranged in an array.

[0046] The spiral electrode comprises an inner electrode rod 311 and an outer electrode 312 wound around the outer surface of the inner electrode rod 311. An insulating dielectric layer 313 is provided on the outer surface of the inner electrode rod 311. Specifically, the outer electrode 312 is wound around the sidewall of the inner electrode rod 311, which has the insulating dielectric layer 313 on its surface. The two ends of the outer electrode 312 are connected to the two ends of the inner electrode rod 311 via potting compound 314. Several groups of spiral electrodes are arranged in an array. The plasma generation module 31 employs multiple spiral electrodes arranged in an array, which, compared to existing flat or simple electrodes, offers higher discharge efficiency, sufficient and stable plasma generation, and improved disinfection effect.

[0047] Obviously, the spiral electrode structure in this embodiment also requires a power supply and auxiliary systems to achieve gas ionization. The power supply and auxiliary systems utilize existing mature solutions, which will not be elaborated upon here.

[0048] The first nozzle assembly is used to perform plasma sterilization treatment on the items conveyed on the material conveying assembly.

[0049] The first nozzle assembly includes: a first pipe 34, a first switching valve 36 connected to the first pipe 34, and a plurality of adjustable nozzles 35 connected to the end of the first pipe 34. The mist outlets of the plurality of adjustable nozzles 35 face the material conveying assembly.

[0050] To achieve plasma spraying in different directions during the material conveying assembly and reduce blind spots in disinfection, the mist outlets of the adjustable nozzles 35 can be configured with different orientations. In this embodiment, the adjustable nozzles 35 are linearly connected to the end portion of the first pipe 34. In other embodiments, the adjustable nozzles 35 can also be configured in a planar distribution according to the shape of the conveyed item or the size of the disinfection surface.

[0051] The adjustable nozzle 35 can be manually or electrically adjusted. When manually adjusted, a flexible hose can be used to connect the adjustable nozzle 35 to the first fitting 34, allowing the angles of the adjustable nozzles 35 at different positions to be adjusted to different angles before disinfecting the items. When the adjustable nozzle 35 has an automatic adjustment structure, a stepper motor or servo motor can be used to drive the angle adjustment of the adjustable nozzle 35. When using a servo motor to adjust the adjustable nozzle 35, the angle of each nozzle can be automatically adjusted before disinfection as needed, or the nozzle angle can be adjusted in real time during disinfection.

[0052] Please refer to it again. Figure 1 The housing 1 is also provided with a fruit and vegetable basket 5. The plasma activation spray assembly also includes a second nozzle assembly, which is connected to the plasma atomizer 33 and is located above the fruit and vegetable basket 5.

[0053] The second nozzle assembly is connected to the plasma atomizer 33 via a second pipe 38, and the second pipe 38 is equipped with a second switching valve to control the on / off state of the second pipe 38. The first nozzle assembly includes: a second pipe 38, a second adjustable nozzle 37 connected to the end portion of the second pipe 38, and a second switching valve to control the on / off state of the second pipe 38. One end of the second pipe 38 is connected to the outlet of the plasma atomizer 33. The first nozzle assembly and the second nozzle assembly share a set of plasma atomizers 33, which clean the items in the material conveying assembly and the fruit and vegetable basket 5 respectively through two separate channels. The material conveying assembly is mainly used to convey textiles and other items, while the fruit and vegetable basket 5 is mainly used to place fruits and vegetables. This zoned disinfection design enables the disinfection equipment to achieve multiple functions.

[0054] Specifically, the first nozzle assembly includes at least two adjustable nozzles 35, which are disposed near the top of the housing 1. The adjustable nozzles 35 are connected to the plasma atomizer 33 through a first pipe 34, and the first pipe 34 is also provided with a first switching valve 36 for controlling the opening and closing of the first pipe 34.

[0055] The housing 1 has a removable cover plate 11 on its top, which is magnetically connected to the housing 1. In other embodiments, the removable cover plate 11 can also be connected to the housing 1 using a snap-fit ​​or other detachable method. The adjustable nozzles 35 are all located below the removable cover plate 11. When environmental disinfection is required, the removable cover plate 11 is removed, the adjustable nozzles 35 are adjusted to face upwards, and the plasma activation spray assembly is activated to spray plasma mist upwards, thus achieving environmental disinfection.

[0056] Furthermore, a high-pressure air pump 32 is provided between the plasma generating module 31 and the plasma atomizer 33. The high-pressure air pump 32 is used to pressurize and quickly deliver the plasma ionized by the plasma generating module 31 to the plasma atomizer 33, so as to increase the amount of plasma finally output.

[0057] Please refer to it again. Figure 1 The material conveying assembly includes: a rotating power unit 21, a transmission belt 23 connected to the rotating power unit 21, and a conveyor belt 22 driven by the transmission belt 23. The rotating power unit 21 is located at the bottom of the housing 1, and the conveyor belt 22 is located at the top of the housing 1. The rotating power unit 21 transmits power to the conveyor belt 22 located at the top through the transmission belt 23. This distribution mechanism can optimize the space utilization inside the housing 1. The rotating power unit 21, plasma generating module 31, high-pressure air pump 32, and plasma atomizer 33 are all located at the bottom of the housing 1, which can also improve the overall stability of the disinfection equipment. The larger space above the cavity inside the housing 1 can increase the number of items that can be disinfected at one time.

[0058] The bottom of the housing 1 is also provided with a drain outlet 51, which is connected to the bottom of the fruit and vegetable basket 5 through a pipe, and is used to discharge the water after the fruits and vegetables are disinfected out of the disinfection equipment.

[0059] The housing 1 is equipped with several casters 12 at its bottom, and an electrical control box 4 is located on the outer wall of the housing 1. The electrical control box 4 is used to control the material conveying assembly and the plasma activation spray assembly to operate the disinfection process according to a preset logic. The casters 12 can be self-locking casters, which facilitates the movement of the disinfection equipment and allows for quick locking after movement.

[0060] In this embodiment, the conveyor belt 22 moves at a speed of approximately 0.1-0.5 m / s under the drive of the rotating power unit 21.

[0061] The housing 1 is made of stainless steel and can be a cuboid structure with dimensions of 800mm x 600mm x 1000mm. In other embodiments, the dimensions of the housing 1 can be adjusted according to actual needs.

[0062] The spiral electrode of the plasma generating module 31 has a length of 140 mm and a spacing of 10 mm between adjacent spiral electrodes. The spiral electrode is connected to a high-voltage power supply (3-4 kV). The corresponding high-voltage air pump 32 (flow rate 10 L / min) delivers the generated plasma to the atomizer. The plasma atomizer mixes the plasma with atomized water to form an activated spray with a spray particle size of less than 10 μm.

[0063] The electrical control box 4 is also equipped with a touch screen, and contains a controller and sensors. The touch screen is used to set the disinfection mode, time and intensity. The sensors include temperature, humidity and motion sensors for automatic adjustment of operation.

[0064] The working process of the plasma-activated spray disinfection device in this embodiment is as follows: For fabric disinfection, place the fabric on conveyor belt 22, start the device, and the adjustable nozzle 35 sprays downwards. The conveyor belt 22 moves to ensure full coverage. For environmental disinfection, remove the removable cover 11, adjust the adjustable nozzle 35 upwards, and spray. For fruit and vegetable washing, place the items in the storage space of the fruit and vegetable basket 5, add water, start the plasma spray, and the water is discharged through the drain 51 after washing.

[0065] When disinfecting fabrics, the fabric to be disinfected is first laid flat on the conveyor belt 22, then the control system is activated to drive the conveyor belt 22 to slowly transport the fabric forward, and the adjustable nozzle 35 is turned on according to the disinfection mode to spray plasma activation spray onto the fabric.

[0066] When disinfecting the environment, first remove the removable cover 11 on the top of the housing 1, then rotate the adjustable nozzle 35 so that the nozzle faces upward, and finally start the control system to spray the activated plasma spray into the environment to complete the environmental disinfection.

[0067] When cleaning fruits and vegetables, first place the fruits and vegetables to be cleaned into the fruit and vegetable basket 5, the control system starts the cleaning program, and the second nozzle 37 sprays activated plasma spray onto the surface of the fruits and vegetables to achieve cleaning and disinfection; after cleaning and disinfection, the sewage is discharged through the drain outlet 51, and the fruits and vegetables can be temporarily stored in the fruit and vegetable basket 5.

[0068] When the adjustable nozzle 35 structure is designed with electric control, it is suitable for scenarios such as hospitals and factories that require high efficiency and continuous operation. It can automatically control the operation of the transmission device, the opening and closing and angle adjustment of the nozzle, and the start and stop of the plasma generation system through preset programs.

[0069] The plasma-activated spray disinfection device in this embodiment is suitable for multi-functional and complex scenarios, such as food processing workshops. After the user selects the disinfection mode, the control system completes the subsequent automated process, such as fruit and vegetable washing, fabric disinfection, and environmental spraying.

[0070] This utility model discloses a plasma-activated spray disinfection device, which uses plasma-activated spraying for disinfection, avoiding chemical residues found in traditional disinfection methods, making it safe and environmentally friendly. The nozzle angle is adjustable, making it suitable for different disinfection scenarios. It integrates fabric disinfection, environmental disinfection, fruit and vegetable disinfection, and storage functions into a single disinfection device, reducing equipment purchase costs and improving space utilization.

[0071] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. A plasma-activated spray disinfection device, characterized in that, include: A housing, comprising a plasma-activated spray assembly and a material conveying assembly disposed within the housing; The plasma-activated spray assembly includes: a plasma generating module, a plasma atomizer connected to the plasma generating module, and a first nozzle assembly connected to the plasma atomizer; The first nozzle assembly is positioned above the material conveying assembly. During the dynamic conveying of the material by the material conveying assembly, the first nozzle assembly sprays activated plasma toward the material at multiple different angles for disinfection. The plasma generating module includes a plurality of spiral electrodes arranged in an array; each spiral electrode includes an inner electrode rod and an outer electrode wound around the outside of the inner electrode rod, and the outer surface of the inner electrode rod is provided with an insulating dielectric layer.

2. The plasma-activated spray disinfection device according to claim 1, characterized in that, The housing is also equipped with a fruit and vegetable basket. The plasma-activated spray assembly further includes a second nozzle assembly, which is connected to the plasma atomizer and is located above the fruit and vegetable basket.

3. The plasma-activated spray disinfection device according to claim 2, characterized in that, The second nozzle assembly is connected to the plasma atomizer via a second pipe, and the second pipe is provided with a second switching valve to control the opening and closing of the second pipe.

4. The plasma-activated spray disinfection device according to claim 1, characterized in that, The first nozzle assembly includes at least two adjustable nozzles, which are disposed near the top of the housing. The adjustable nozzles are connected to the plasma atomizer via a first pipe, which is also provided with a first switching valve for controlling the opening and closing of the first pipe.

5. The plasma-activated spray disinfection device according to claim 4, characterized in that, The top of the housing is provided with a removable cover.

6. The plasma-activated spray disinfection device according to claim 1, characterized in that, A high-pressure air pump is also provided between the plasma generating module and the plasma atomizer.

7. The plasma-activated spray disinfection device according to any one of claims 1 to 6, characterized in that, The material conveying assembly includes: a rotational power unit, a transmission belt connected to the rotational power unit, and a conveyor belt controlled by the transmission belt.

8. The plasma-activated spray disinfection device according to claim 7, characterized in that, The bottom of the housing is also provided with several casters, and the outer wall of the housing is also provided with an electrical control box. The electrical control box is used to control the material conveying assembly and the plasma activation spray assembly to run the disinfection process according to the preset logic.

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