A plasma air sterilizer

Abstract

This utility model relates to the field of air purification technology and discloses a plasma air sterilizer, including a housing with an integrated control system. Inside the housing are a fan system and an air purification system electrically connected to the control system. The air purification system includes a composite purification component and a secondary pollution prevention component arranged sequentially along the airflow direction. The composite purification component purifies the air, while the secondary pollution prevention component prevents secondary air pollution. The composite purification component includes a plasma generating module and an electrostatic dust collection module arranged sequentially along the airflow direction. The plasma generating module includes a dielectric barrier discharge structure, and the electrostatic dust collection module includes a honeycomb electrode structure. This utility model has a compact structure, is easy to maintain, and is highly safe. It achieves efficient air purification with high microbial kill rate and particle adsorption rate. The purification process effectively inhibits ozone generation, thus improving the safety of air purification.

Description

Technical Field

[0001] This utility model relates to the field of air purification technology, and in particular to a plasma air sterilizer. Background Technology

[0002] As air is the core carrier of respiratory viruses, air safety has become a focal point in public health. Related studies have clearly confirmed that many highly pathogenic pathogens can remain suspended in enclosed spaces for extended periods in aerosol form and can spread over long distances. Conventional ventilation methods are insufficient to completely eliminate these suspended pathogens, posing a serious challenge to air safety in medical facilities, homes, and public places. Against this backdrop, plasma air disinfection technology, with its highly efficient and broad-spectrum disinfection characteristics, has become a key means of blocking the airborne transmission of viruses.

[0003] However, traditional equipment lacks the ability to capture fine particles in the air, especially ultrafine particles with a diameter of only 0.01μm, which it cannot effectively adsorb. Furthermore, its sterilization mechanism is singular, with a low kill rate against viruses, bacteria, and other microorganisms, making it difficult to cope with the diverse pathogens in complex air environments and failing to achieve ideal air purification results. Secondly, most traditional air purifiers use fixed filters or purification components. When replacing filters or maintaining core purification components, it often requires disassembling a large portion of the outer casing, resulting in numerous and time-consuming steps. This not only increases maintenance costs for users but may also lead to decreased purification efficiency due to untimely maintenance, affecting the equipment's continued effectiveness. Moreover, some traditional purifiers generate excessive ozone during operation, which can irritate the human respiratory tract and harm human health. Additionally, during the dust collection process, some devices are prone to secondary release of captured particles, causing secondary air pollution and contradicting the core objective of air purification.

[0004] Therefore, this utility model designs an plasma air sterilizer to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a plasma air sterilizer to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a plasma air sterilizer, including a housing, on which a control system is integrated; a fan system and an air purification system electrically connected to the control system are disposed inside the housing, and the air purification system is disposed corresponding to the air inlet of the fan system;

[0007] The air purification system includes a composite purification component and a secondary pollution prevention component arranged sequentially along the airflow direction. The composite purification component purifies the air, and the secondary pollution prevention component prevents secondary pollution of the air.

[0008] The composite purification component includes a plasma generation module and an electrostatic dust collection module arranged sequentially along the airflow direction; the plasma generation module includes a dielectric barrier discharge structure, and the electrostatic dust collection module includes a honeycomb electrode structure.

[0009] Preferably, the plasma generating module includes graphene electrodes and a dielectric carrier, wherein the graphene electrodes are arranged in an alternating pattern on the surface of the dielectric carrier.

[0010] Preferably, the electrostatic dust collection module includes a positive electrode plate and a negative electrode plate, which form a honeycomb porous structure to increase the adsorption area for charged particles.

[0011] Preferably, the anti-secondary pollution component includes an electret fiber layer disposed on the outlet side of the electrostatic dust collection module, and the surface of the electret fiber layer is provided with a photocatalytic coating.

[0012] Preferably, the photocatalytic coating comprises a copper-iron co-doped titanium dioxide coating with a thickness of 0.1-0.3 mm.

[0013] Preferably, the housing is provided with several position-adjustable mounting slide rails, and a U-shaped rod quick-release module is movably mounted on the mounting slide rails. The U-shaped rod quick-release module is adapted to the plasma generating module and the electrostatic dust collection module, and the plasma generating module and the electrostatic dust collection module are mounted on the mounting slide rails through the U-shaped rod quick-release module.

[0014] Preferably, the U-shaped quick-release module is equipped with conductive contacts and an airtightness detection device, and the plasma generation module and the electrostatic dust collection module automatically complete the circuit connection and airtightness detection when inserted.

[0015] Preferably, a reverse pulse cleaning system is provided inside the housing, which is electrically connected to the electrostatic dust collection module and is used to periodically remove particulate matter from the electrostatic dust collection module.

[0016] Preferably, the control system includes an electrically connected control module, control panel, and operation buttons. The control module is disposed within the cavity of the housing, and the control panel and operation buttons are disposed on the outer surface of the housing.

[0017] Preferably, the bottom of the housing is provided with an air inlet and the top of the housing is provided with an air outlet, and a filter module for filtering air is respectively provided in the air inlet and the air outlet.

[0018] Compared with existing technologies, this utility model has the following advantages and technical effects: This utility model discloses a plasma air sterilizer. The housing serves as the basic carrier, and a control system for operation and regulation is integrated on the housing. Inside the housing, a fan system and an air purification system are electrically connected to the control system. The air inlets of the air purification system and the fan system are arranged correspondingly to ensure that the airflow driven by the fan can flow completely through the air purification system, achieving full-process purification and preventing the direct discharge of unpurified air, thus maximizing purification efficiency. Simultaneously, the layered design of dual-stage composite purification and secondary pollution prevention makes the functions of each component clear and complementary, further enhancing the overall purification performance. The air purification system sequentially arranges composite purification components and secondary pollution prevention components along the airflow direction. The composite purification components undertake the core air purification task, while the secondary pollution prevention components are used to block the generation path of secondary pollution during the purification process, avoiding the re-release of pollutants or the generation of harmful byproducts during purification, ensuring that the purified air does not introduce new pollution, meeting the high air safety requirements of medical, residential, and other scenarios. The two work together to form a complete air treatment chain. The composite purification module adopts a two-stage design of plasma sterilization and electrostatic dust collection. The plasma generation module and the electrostatic dust collection module are arranged sequentially along the airflow direction. The plasma generation module adopts a dielectric barrier discharge structure, which can generate hydroxyl radicals through discharge. The strong oxidizing properties of the free radicals destroy the cell structure or genetic material of microorganisms, and can destroy the microbial structure broadly. Combined with the subsequent adsorption of microbial carriers by the electrostatic dust collection module, the equipment can kill microorganisms with a kill rate of over 99.9%, which is far superior to traditional single purification equipment. The electrostatic dust collection module adopts a honeycomb electrode structure, which expands the plasma action area and electrostatic adsorption area. It can efficiently adsorb charged particles in the air, with an adsorption rate of ≥98% for ultrafine particles with a particle size as low as 0.01μm. It can effectively capture tiny pollutants that are difficult to handle by conventional equipment, and solve the problem of low removal efficiency of ultrafine particles by traditional equipment. As the core control unit, the control system is electrically connected to the fan system and the air purification system. It can synchronously adjust the airflow drive intensity of the fan, the discharge parameters of the plasma generation module, and the electric field intensity of the electrostatic dust collection module to ensure that the operating parameters of each component are matched. This not only guarantees the purification effect under different pollution scenarios, but also avoids unnecessary energy waste, taking into account both practicality and economy, and achieving a stable purification effect.

[0019] This utility model has a compact structure, is easy to maintain, and is highly safe. It can achieve efficient air purification, with high microbial inactivation and particle adsorption rates. The purification process can effectively inhibit ozone production, thus improving the safety of air purification. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0021] Figure 1 This is an axial view of the plasma air sterilizer of this utility model;

[0022] Figure 2 This is a schematic diagram of the internal structure of the plasma air sterilizer of this utility model;

[0023] Figure 3 This utility model Figure 2 A magnified view of part A in the image;

[0024] Figure 4 This utility model Figure 2 A magnified view of part B in the image;

[0025] Figure 5 This is a schematic diagram of the filter module structure of this utility model;

[0026] In the diagram: 1. Housing; 2. Fan system; 3. Air purification system; 4. Control system; 5. Mounting rail; 6. Reverse pulse cleaning system; 11. Casters; 12. Air inlet; 13. Air outlet; 14. Primary filter; 15. Activated carbon filter layer; 31. Plasma generation module; 32. Electrostatic dust collection module; 33. Anti-secondary pollution component; 311. Graphene electrode; 312. Dielectric carrier; 321. Positive electrode plate; 322. Negative electrode plate; 331. Electret fiber layer; 332. Photocatalytic coating; 41. Control module; 42. Control panel; 43. Operation button; 51. U-shaped quick-release module; 511. Conductive contact; 512. Air tightness detection device. Detailed Implementation

[0027] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Reference Figures 1 to 5As shown, this embodiment provides a plasma air sterilizer, including a housing 1, on which a control system 4 is integrated; inside the housing 1 are a fan system 2 and an air purification system 3 electrically connected to the control system 4, and the air purification system 3 is correspondingly arranged with the air inlet 12 of the fan system 2.

[0030] The air purification system 3 includes a composite purification component and a secondary pollution prevention component 33 arranged sequentially along the air flow direction. The composite purification component purifies the air, and the secondary pollution prevention component 33 prevents secondary pollution of the air.

[0031] The composite purification component includes a plasma generating module 31 and an electrostatic dust collection module 32 arranged sequentially along the airflow direction. The plasma generating module 31 includes a dielectric barrier discharge structure, and the electrostatic dust collection module 32 includes a honeycomb electrode structure. This utility model discloses a plasma air sterilizer. The housing 1 serves as the basic carrier, and a control system 4 for operation and regulation is integrated on the housing 1. Inside the housing 1, a fan system 2 and an air purification system 3 are electrically connected to the control system 4. The air purification system 3 is arranged correspondingly to the air inlet 12 of the fan system 2, ensuring that the airflow driven by the fan can completely flow through the air purification system 3, achieving full-process purification and preventing the direct discharge of unpurified air, thus maximizing purification efficiency. Simultaneously, the layered design of dual-stage composite purification and prevention of secondary pollution makes the functions of each component clear and complementary, further enhancing the overall purification performance. The air purification system 3 is arranged with a composite purification component and a secondary pollution prevention component 33 in sequence along the air flow direction. The composite purification component undertakes the core air purification task, while the secondary pollution prevention component 33 is used to block the generation path of secondary pollution during the purification process, avoid the problem of re-release of pollutants or generation of harmful by-products during the purification process, and ensure that the purified air will not introduce new pollution, which meets the high requirements for air safety in medical, home and other scenarios. The two work together to form a complete air treatment chain. The composite purification module adopts a two-stage design of plasma sterilization and electrostatic dust collection. The plasma generation module 31 and the electrostatic dust collection module 32 are arranged sequentially along the airflow direction. The plasma generation module 31 adopts a dielectric barrier discharge structure, which can generate hydroxyl radicals through discharge. The strong oxidizing properties of the free radicals destroy the cell structure or genetic material of microorganisms, and can destroy the microbial structure in a broad spectrum. Combined with the adsorption of microbial carriers by the subsequent electrostatic dust collection module 32, the equipment can kill microorganisms with a kill rate of over 99.9%, which is far superior to traditional single purification equipment. The electrostatic dust collection module 32 adopts a honeycomb electrode structure, which expands the plasma action area and electrostatic adsorption area. It can efficiently adsorb charged particles in the air, with an adsorption rate of ≥98% for ultrafine particles with a particle size as low as 0.01μm. It can effectively capture tiny pollutants that are difficult to handle by conventional equipment, and solve the problem of low removal efficiency of ultrafine particles by traditional equipment. The control system 4, as the core control unit, is electrically connected to the fan system 2 and the air purification system 3. It can synchronously adjust the airflow drive intensity of the fan, the discharge parameters of the plasma generation module 31, and the electric field strength of the electrostatic dust collection module 32, ensuring that the operating parameters of each component are matched. This guarantees purification effects under different pollution scenarios while avoiding unnecessary energy waste, balancing practicality and economy to achieve stable purification results. This invention features a compact structure, convenient maintenance, and high safety. It achieves highly efficient air purification with high microbial inactivation and particle adsorption rates. The purification process effectively inhibits ozone generation, improving the safety of air purification.

[0032] In one embodiment of this utility model, the bottom end of the housing 1 is provided with several steerable and self-locking casters 11 to facilitate the movement of the equipment.

[0033] In one embodiment of this utility model, the fan system 2 is selected according to the air purification requirements, which is a conventional choice for those skilled in the art and is not limited here.

[0034] Further optimization of the design resulted in a plasma generation module 31 comprising graphene electrodes 311 and a dielectric carrier 312, with the graphene electrodes 311 arranged in an alternating pattern on the surface of the dielectric carrier 312. The graphene electrodes 311 and the dielectric carrier 312 work synergistically, effectively suppressing ozone generation through electric field modulation and reaction path optimization, achieving a measured ozone concentration of 0 mg / m³. 3 It complies with GB28232-2020 standards, avoiding the irritation of ozone to the human respiratory tract; the graphene electrode 311 has excellent conductivity, and the staggered arrangement can optimize the electric field distribution, reduce arcing, improve discharge efficiency, ensure the stable generation of hydroxyl radicals, and enhance the sustainability of the bactericidal effect.

[0035] Further optimizing the design, the electrostatic dust collection module 32 includes a positive electrode plate 321 and a negative electrode plate 322. The positive and negative electrode plates 321 and 322 form a honeycomb porous structure, increasing the adsorption area for charged particles. This honeycomb porous structure significantly increases the contact area between the electrodes and the air, enhancing the probability of capturing charged particles and further strengthening the adsorption capacity for ultrafine particles, ensuring that the adsorption rate of 0.01μm particles remains stable at ≥98%. Simultaneously, the porous structure allows for more uniform airflow distribution within the module, preventing airflow short-circuiting and ensuring that every portion of the air undergoes electrostatic adsorption treatment, improving overall purification efficiency and reducing the direct discharge of unpurified air.

[0036] Further optimizing the design, the anti-secondary pollution component 33 includes an electret fiber layer 331 disposed on the outlet side of the electrostatic dust collection module 32, with a photocatalytic coating 332 applied to its surface. The electret fiber layer 331 captures particles escaping from the electrostatic dust collection module 32, while the photocatalytic coating 332 efficiently decomposes organic pollutants under plasma excitation. The two work synergistically to eliminate secondary pollution from both physical interception and chemical decomposition perspectives. Simultaneously, the decomposition of organic pollutants by the photocatalytic coating 332 reduces the accumulation of pollutants on the component surface. Combined with the interception effect of the electret fiber layer 331, this reduces the component cleaning frequency and extends the maintenance cycle.

[0037] Further optimization of the design resulted in a photocatalytic coating 332 comprising a copper-iron co-doped titanium dioxide coating with a thickness of 0.1-0.3 mm. Copper-iron co-doping alters the band structure of titanium dioxide, enhancing its absorption of visible light. Under plasma excitation, it can more efficiently decompose organic pollutants, improving the degradation efficiency of harmful organic compounds such as formaldehyde and TVOCs. The 0.1-0.3 mm coating thickness ensures sufficient catalytic active sites while avoiding peeling caused by excessive coating thickness, guaranteeing the stability of the catalytic effect during long-term use of the module and extending the coating's lifespan.

[0038] The design is further optimized by incorporating several adjustable mounting rails 5 within the housing 1. U-shaped quick-release modules 51 are movably mounted on these rails 5, adapting to the plasma generation module 31 and the electrostatic precipitator module 32. These modules are then installed on the mounting rails 5 via the U-shaped quick-release modules 51. This U-shaped quick-release structure, combined with the mounting rails 5, allows for rapid disassembly and installation of the plasma and electrostatic precipitator modules 32, with module replacement time less than 30 seconds. This solves the problem of numerous disassembly steps and time-consuming maintenance in traditional equipment. The adjustable mounting rails 5 allow for adjustment of module installation positions according to actual purification needs, accommodating purification modules of different sizes or performance levels, thus enhancing the flexibility and compatibility of the equipment structure.

[0039] The design has been further optimized. The U-shaped quick-release module 51 is equipped with conductive contacts 511 and an airtightness detection device 512. When the plasma generation module 31 and the electrostatic dust collection module 32 are inserted, the circuit connection and airtightness detection are automatically completed. The conductive contacts 511 are automatically aligned to achieve circuit connection, eliminating the need for manual wiring, reducing installation steps, further shortening module replacement time, and reducing maintenance difficulty. The airtightness detection device 512 can monitor the airtightness after installation in real time. If the airtightness does not meet the standard, it can promptly provide a warning to avoid leakage of unpurified air due to poor sealing, ensuring the purification effect, and preventing internal components of the equipment from being damaged by moisture due to air leakage.

[0040] To further optimize the design, a reverse pulse cleaning system 6 is installed inside the housing 1. This system is electrically connected to the electrostatic precipitator module 32 and is used to periodically remove particulate matter from the module. The reverse pulse cleaning system 6 utilizes 15kV / 0.5s reverse pulse cleaning technology to efficiently remove particulate matter from the precipitator module, avoiding secondary pollution caused by particulate matter falling off during manual cleaning and ensuring the safety of the purification process. Periodic cleaning reduces the accumulation of particulate matter on the electrode plates, preventing a decrease in adsorption efficiency or abnormal electric field due to contamination, extending the service life of the electrostatic precipitator module 32, and reducing replacement costs.

[0041] Further optimizing the design, the control system 4 includes an electrically connected control module 41, control panel 42, and operation buttons 43. The control module 41 is located inside the housing 1, while the control panel 42 and operation buttons 43 are located on the outer surface of the housing 1. The control panel 42 and operation buttons 43 on the outer surface allow users to intuitively view the equipment's operating status, such as purification mode and running time, and to perform operations, adapting to the usage needs of different scenarios such as medical and home use. The control module 41, built into the inner cavity of the housing 1, serves as the core of the equipment's automatic control, preventing external dust and moisture from corroding the circuitry, reducing the probability of failure, and ensuring the stability and reliability of the control system 4.

[0042] Further optimizing the design, an air inlet 12 is located at the bottom of the housing 1, and an air outlet 13 is located at the top of the housing 1. Both the air inlet 12 and the air outlet 13 contain filter modules for filtering air. This bottom-inlet, top-outlet structure conforms to the natural air convection principle, creating a top-down airflow circulation that ensures all indoor air flows through the device, improving the uniformity of air purification. The filter module at the air inlet 12 pre-filters large particles such as hair and dust, preventing them from entering the core purification components and causing blockages. The filter module at the air outlet 13 further intercepts any small particles that may escape. This dual filtration further enhances the purification effect, ensuring the cleanliness of the exhausted air.

[0043] In one embodiment of this utility model, the filtration module includes a primary filter 14 and an activated carbon filter layer 15, which filter the incoming and outgoing air in layers.

[0044] Specific examples:

[0045] 1. Ozone concentration measurement in plasma air sterilizer

[0046] The test was conducted according to the descriptions in Section 2.1.5.7 of the "Disinfection Technical Specifications" (2002 edition) and GB28232-2020 "Hygienic Requirements for Ozone Disinfection Machines". The disinfection machine was placed in a room (35.00m³). 3 Area 13.36m² 2 Turn on the disinfection machine and measure the ambient ozone concentration at a height of 1.5m above the ground for 15 minutes. Measure the ozone concentration every 5 minutes. The result is the difference between the maximum measured ozone concentration and the ambient background concentration. Repeat the experiment three times. (Indoor temperature 23-24℃, humidity 33-62%)

[0047] The specific test results are shown in the table below:

[0048] Table 1. Results of ozone concentration (mg / m3) measurement by plasma air sterilizer

[0049]

[0050] The disinfection machine operated for 15 minutes, and the ozone concentration in the room was measured. The ozone concentration was 0 mg / m3 in all cases. This result indicates that the synergistic design of the graphene electrode and the dielectric carrier can effectively suppress ozone generation. The core principle lies in electric field modulation and reaction path optimization.

[0051] 2. Simulated field test of air disinfection

[0052] The test was conducted according to the description in section 5.3.5 of WST10009-2023 "Test Methods for Disinfection Products".

[0053] 2.1 Preparation of bacterial suspension: The slant of Staphylococcus aureus cultured for 18h-24h was washed with nutrient broth to remove the bacterial growth. After filtration with sterile defatted cotton, the suspension was diluted with nutrient broth culture medium to prepare the concentration of the bacterial suspension for the test. The suspension was then added evenly to two aerosol generators.

[0054] 2.2 Turn on the computer, start the aerosol chamber control software, and simultaneously adjust the temperature and relative humidity of the two aerosol chambers to the required test temperature (20℃-25℃) and relative humidity (50%-70%).

[0055] 2.3 Place all equipment into the aerosol chamber at once and close the door. Thereafter, all operations and manipulation of the equipment must be performed from outside using a remote control or remote with a sealed sleeve. The door may not be opened until the experiment is completed and the aerosol chamber or indoor air has been disinfected.

[0056] 2.4 Connect the aerosol generator tightly to the spray pipes of the control chamber and the test chamber respectively, and start the aerosol spray button on the aerosol chamber control software. Under a pressure of 30 PSI, spray bacteria into both aerosol chambers simultaneously for 5 minutes using the aerosol generator. Simultaneously, the software automatically turns on the stirring fan and sets it to continue stirring for 5 minutes after spraying. After stirring, let it stand for 5 minutes. Place the sampler, fully loaded with plates, at a height of 1 m above the center of the aerosol chamber, and sample the control and test chambers before disinfection (sampling flow rate 28.3 L / min). Turn on the plasma air sterilizer to disinfect the test chamber for 7.5 min and 15 min, and sample after disinfection. Sample the control chamber simultaneously according to the aforementioned requirements. Remove the plates aseptically, incubate them in a 36℃±1℃ incubator for 48 h, and count the bacteria. Calculate the number of surviving bacteria, natural mortality rate, and kill rate in the air under different conditions. The experiment was repeated 3 times. Specific experimental results are shown in Table 2:

[0057] Table 2 shows the results of the simulated field test for air disinfection.

[0058]

[0059] Note: The negative control showed no sterile growth.

[0060] 3. Field test of air disinfection effect

[0061] Choose 35m 3 The experiment was conducted in an unoccupied room. Naturally occurring bacteria in the air were sampled using a six-mesh air impactor. The sampler was placed 1.0m above the center of the room and served as the pre-disinfection sample (positive control). A second sample was taken 15 minutes after disinfection to serve as the post-disinfection test sample. The specific experimental results are shown in Table 3.

[0062] Table 3 shows the results of the simulated field test for air disinfection.

[0063]

[0064] The test results show that the plasma air sterilizer equipped with a composite purification system and a secondary pollution prevention system has a kill rate of >99.90% for white grape-like particles in the aerosol chamber air after 15 minutes of disinfection, demonstrating excellent sterilization effect.

[0065] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 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.

[0066] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A plasma air sanitizer, characterized by: Includes a housing (1), on which a control system (4) is integrated; inside the housing (1) are a fan system (2) and an air purification system (3) electrically connected to the control system (4), and the air purification system (3) is correspondingly arranged with the air inlet (12) of the fan system (2); The air purification system (3) includes a composite purification component and a secondary pollution prevention component (33) arranged sequentially along the air flow direction. The composite purification component purifies the air, and the secondary pollution prevention component (33) prevents secondary pollution of the air. The composite purification component includes a plasma generating module (31) and an electrostatic dust collection module (32) arranged sequentially along the airflow direction; the plasma generating module (31) includes a dielectric barrier discharge structure, and the electrostatic dust collection module (32) includes a honeycomb electrode structure.

2. The plasma air sterilizer of claim 1, wherein: The plasma generating module (31) includes graphene electrodes (311) and a dielectric carrier (312), wherein the graphene electrodes (311) are arranged in an alternating pattern on the surface of the dielectric carrier (312).

3. The plasma air sterilizer of claim 2, wherein: The electrostatic dust collection module (32) includes a positive electrode plate (321) and a negative electrode plate (322). The positive electrode plate (321) and the negative electrode plate (322) form a honeycomb porous structure to increase the adsorption area for charged particles.

4. The plasma air sterilizer of claim 1, wherein: The secondary pollution prevention component (33) includes an electret fiber layer (331) disposed on the outlet side of the electrostatic dust collection module (32), and a photocatalytic coating (332) is disposed on the surface of the electret fiber layer (331).

5. The plasma air sterilizer of claim 4, wherein: The photocatalytic coating (332) includes a copper-iron co-doped titanium dioxide coating with a thickness of 0.1-0.3 mm.

6. The plasma air sanitizer of claim 1, wherein: The housing (1) is provided with several position-adjustable mounting slide rails (5). A U-shaped rod quick-release module (51) is movably mounted on the mounting slide rail (5). The U-shaped rod quick-release module (51) is adapted to the plasma generating module (31) and the electrostatic dust collection module (32). The plasma generating module (31) and the electrostatic dust collection module (32) are mounted on the mounting slide rail (5) through the U-shaped rod quick-release module (51).

7. The plasma air sterilizer according to claim 6, characterized in that: The U-shaped quick-release module (51) is equipped with conductive contacts (511) and an airtightness detection device (512). When the plasma generation module (31) and the electrostatic dust collection module (32) are inserted, the circuit connection and airtightness detection are automatically completed.

8. The plasma air sterilizer according to claim 1, characterized in that: The housing (1) is provided with a reverse pulse cleaning system (6), which is electrically connected to the electrostatic dust collection module (32) and is used to periodically remove particulate matter from the electrostatic dust collection module (32).

9. The plasma air sterilizer according to claim 1, characterized in that: The control system (4) includes an electrically connected control module (41), a control panel (42), and an operation button (43). The control module (41) is disposed in the inner cavity of the housing (1), and the control panel (42) and the operation button (43) are disposed on the outer surface of the housing (1).

10. The plasma air sterilizer according to claim 1, characterized in that: The bottom end of the housing (1) is provided with an air inlet (12), and the top end of the housing (1) is provided with an air outlet (13). The air inlet (12) and the air outlet (13) are respectively provided with filter modules for filtering air.

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