Plasma ventilation purification device and method

Abstract

This invention discloses a plasma ventilation and purification device and method, relating to the field of energy conservation and environmental protection. When airflow occurs, the plasma ventilation and purification device uses a wind pressure sensor to collect wind pressure data and sends it to a centralized control module. The centralized control module outputs stored voltage, current, and frequency operating parameters to power the plasma generator. The generated plasma density is indirectly detected by an ultraviolet sensor and an ozone sensor. After the detection data is sent to the centralized control module, it automatically adjusts the output voltage, current, and frequency values ​​to ensure that the plasma density is consistently highest and the ozone content is lowest under different environments. The cathode plate can collect particles and can be extracted for cleaning, eliminating the need for intermediate and high-precision filters, ultraviolet generators, and other facilities, thus reducing the size and weight of the device. The ozone degrader converts ozone into oxygen, ensuring that the ozone content does not exceed the standard and improving air purification efficiency. This achieves energy-saving and environmentally friendly effects such as no consumables required, human-machine coexistence, sterilization, pollution degradation, and automatic operation.

Description

Technical Field

[0001] This invention relates to the field of energy conservation and environmental protection technology, and in particular to a plasma ventilation and purification device and method. Background Technology

[0002] With industrial development, environmental pollution is worsening and air quality is declining. In severe cases, harmful gases, particulate matter, and pathogenic microorganisms in the air can cause illness. Therefore, efficient disinfection and sterilization of the air in crowded and densely populated areas is particularly important.

[0003] Currently available low-temperature plasma generators and methods cannot guarantee all-weather, high-density, and pure plasma generation, resulting in problems such as poor air purification efficiency, excessive ozone levels, large size and weight, and high energy consumption. Summary of the Invention

[0004] To address the problems mentioned in the background art, the present invention provides a plasma ventilation and purification device and method that can generate pure high-density plasma around the clock, reduce the size and weight of the device and the amount of ozone, and improve air purification efficiency.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] On one hand, the present invention provides a plasma ventilation and purification device, comprising: a housing, an air inlet, an air outlet, a coarse filter, a plasma generator, a sensor module, a central control module, and an ozone degrader;

[0007] The air inlet and the air outlet are respectively located on opposite sides of the exterior of the housing; the coarse filter is located inside the housing near the air inlet; the ozone degrader is located inside the housing near the air outlet; the plasma generator, the sensor module, and the control module are located between the coarse filter and the ozone degrader; the plasma generator is located near the coarse filter; the sensor module and the control module are located near the ozone degrader.

[0008] The plasma generator and the sensor module are both connected to the central control module. The plasma generator includes multiple cathode plates arranged side by side and a row of anode wires between each pair of adjacent cathode plates. Each row of anode wires is formed by a single anode wire wound in a serpentine shape around an insulating frame, with the bends of the serpentine anode wire fixed to the insulating frame. The two ends of each anode wire are connected to allow multiple anode wires to be connected in parallel in the circuit. The cathode plates are connected by metal guide posts. The spacing between adjacent cathode plates is the same. The sensor module includes an ultraviolet sensor, an ozone sensor, and a wind pressure sensor.

[0009] Optionally, the cathode plate is provided with large holes and small holes; the large holes and small holes on two adjacent cathode plates are staggered.

[0010] Optionally, the ozone content in the air purified by the plasma ventilation and purification device is less than 0.02 mg / m³. 3 .

[0011] Optionally, the plasma ventilation and purification device is installed in a ventilation duct, central air conditioning system, or fresh air system.

[0012] On the other hand, the present invention also provides a plasma ventilation and purification method based on the plasma ventilation and purification device, comprising:

[0013] When air with a certain wind pressure is sent into the air inlet, it first passes through a coarse filter to remove larger particles in the air, and then passes through the plasma generator, sensor module and ozone degrader in sequence before being discharged from the air outlet.

[0014] The intensity of ultraviolet radiation and the amount of ozone in the plasma generator are detected by ultraviolet sensors and ozone sensors, respectively, and the data are sent to the centralized control module.

[0015] The centralized control module indirectly detects the generated plasma density based on ultraviolet intensity and ozone levels, and adjusts the output operating parameters in real time according to the generated plasma density to ensure that the plasma density is always at its highest and the ozone level is lowest under different environments; the operating parameters include voltage, current and frequency.

[0016] The central control module supplies power to the plasma generator according to the operating parameters, so that high-density plasma is generated between multiple rows of anode wires and multiple cathode plates;

[0017] The plasma sterilizes and decomposes pollutants in the air that flows through it. At the same time, the cathode plate adsorbs particles of all sizes in the air, and the ozone degrader degrades the ozone generated into oxygen, which is then discharged as pure and healthy air from the outlet.

[0018] Optionally, the factory calibration method for the plasma ventilation and purification device includes:

[0019] Configure the number of cathode plates and anode wires in the plasma generator according to the required airflow rate;

[0020] A number of plasma generators were placed in a constant temperature and humidity test chamber. Air with different PM2.5 contents was injected into the test chamber. The working parameters and corresponding ultraviolet intensity and ozone content data at the best purification effect of the air outlet were measured.

[0021] After removing the plasma generator from the experimental chamber, the plasma density value was obtained using a plasma density detector.

[0022] The corresponding operating parameters, ultraviolet intensity, ozone concentration, and plasma density values ​​are calibrated and written into the CPU of the centralized control module.

[0023] Optionally, the plasma ventilation and purification method further includes:

[0024] When the centralized control module detects that the plasma density or ozone level deviates from the factory calibration range, it will issue an audible and visual alarm.

[0025] Optionally, the plasma ventilation and purification method further includes:

[0026] When the wind pressure sensor detects airflow, the central control module starts up and runs synchronously; when the wind pressure sensor no longer detects wind pressure, the central control module shuts down synchronously.

[0027] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0028] The plasma ventilation and purification device and method provided by this invention include a housing, an air inlet, an air outlet, a coarse filter, a plasma generator, a sensor module, a central control module, and an ozone degrader. The sensor module includes an ultraviolet sensor, an ozone sensor, and a wind pressure sensor. When air passes through, the wind pressure sensor sends wind pressure data to the central control module, which then outputs stored operating parameters such as voltage, current, and frequency to power the plasma generator. The generated plasma density is indirectly detected by the ultraviolet sensor and the ozone sensor. After the detection data is sent to the central control module, it automatically adjusts the output of suitable voltage, current, and frequency values ​​to ensure that the plasma density is constantly maximized and the ozone content is minimized under different environments. The cathode plate can collect particles and can be extracted for cleaning, eliminating the need for a medium filter, high filter, ultraviolet generator, and other facilities, thus reducing the size and weight of the device. The ozone degrader converts ozone into oxygen, ensuring that the ozone content does not exceed the standard and improving air purification efficiency. This achieves energy-saving and environmentally friendly effects such as no consumables required, human-machine coexistence, sterilization, pollution degradation, and automatic operation. Attached Figure Description

[0029] 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 introduced 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.

[0030] Figure 1 This is a side cross-sectional view of the plasma ventilation and purification device of the present invention;

[0031] Figure 2This is an exploded view of the plasma ventilation and purification device of the present invention;

[0032] Figure 3 This is an exploded view of the plasma generator of the present invention. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] The air medium, temperature, humidity, and wind pressure in the working environment are constantly changing. If the plasma density and ozone level are not detected to adjust the output voltage, current, and frequency in real time, high-density plasma cannot be generated and ozone levels cannot be reduced, thus failing to achieve energy conservation and environmental protection. The purpose of this invention is to provide a plasma ventilation and purification device and method that can generate pure, high-density plasma around the clock, reduce the device's size and weight, and decrease ozone levels, thereby improving air purification efficiency. This solves the problems of existing low-temperature plasma generating devices and methods, such as low and unstable plasma concentration, excessive ozone levels, numerous filters and other facilities, large size and weight, consumables, and high energy consumption.

[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] This invention provides a plasma ventilation and purification device, such as... Figure 1 and Figure 2 As shown, the system includes: a housing, an air inlet 3, an air outlet 4, a coarse filter 5, a plasma generator 6, a sensor module 14, a central control module 12, and an ozone degrader 13. Specifically, the housing includes an upper shell 1 and a lower cover 2 that interlock. The plasma generator 6 includes multiple rows of anode wires 7 and multiple cathode plates 8. The sensor module 14 includes an ultraviolet sensor 9, an ozone sensor 10, and a wind pressure sensor 11. In terms of circuit connections, the plasma generator 6, the sensor module 14, and the ozone degrader 13 are all connected to the central control module 12.

[0037] See Figure 1 and Figure 2The air inlet 3 and the air outlet 4 are respectively located on opposite sides of the exterior of the housing. The coarse filter 5 is located inside the housing near the air inlet 3; the ozone degrader 13 is located inside the housing near the air outlet 4. The plasma generator 6, the sensor module 14, and the control module 12 are located between the coarse filter 5 and the ozone degrader 13. The plasma generator 6 is located near the coarse filter 5; the sensor module 14 and the control module 12 are located near the ozone degrader 13. To further save space, in some embodiments, the sensor module 14 may be located above the control module 12.

[0038] Figure 3 The diagram illustrates the structure of a plasma generator 6, which includes multiple cathode plates 8 arranged side-by-side and a row of anode wires 7 positioned between each pair of adjacent cathode plates 8. Specifically, each row of anode wires 7 is formed by a single anode wire wound in a serpentine pattern around an insulating frame 15, with the bends of the serpentine anode wire fixed to the insulating frame 15. The two ends of each anode wire 7 can be connected to allow multiple anode wires 7 to be connected in parallel in the circuit, and further connected to a central control module 12 as anodes. The cathode plates 8 can be connected to each other via metal guide posts 16, and further connected to the central control module 12 as cathodes. The spacing between adjacent cathode plates 8 is the same. In the plasma generator 6 of this invention, the multiple cathode plates 8 can be connected into a single structure via metal guide posts 16, and the anode wires 7 are fixed using an insulating frame 15, allowing for convenient assembly and sealing of each anode plate 8 and cathode wire 7. The cathode plate 8 can collect bacterial and viral corpses and particles. Multiple cathode plates 8 are integrated into one unit and can be extracted for easy cleaning. This achieves the characteristic of a large plasma output per unit volume plasma generator. It can outperform traditional medical-grade air sterilizers without the need for medium and high filters, ultraviolet generators, or other facilities.

[0039] like Figure 3 As shown, each cathode plate 8 has large and small holes distributed on it. The large and small holes on adjacent cathode plates are staggered, that is, the large hole on the previous cathode plate faces the small hole on the next cathode plate, and vice versa. The cathode plates 8 are shared on both sides and the adjacent air vents are of corresponding sizes. The anode line 7 is distributed between the two cathode plates 8. High-density plasma occurs on both sides of the large and small holes of adjacent cathode plates 8, so that pressurized air can be purified multiple times when it diffracts through. The change in the size of the air vents corresponding to adjacent cathode plates creates multiple airflow changes, which can greatly improve the air purification effect.

[0040] The working process of the plasma ventilation and purification device of this invention is as follows: Air with a certain wind pressure is sent into the air inlet 3, and larger particles in the air are filtered out by the washable coarse filter 5. The air then passes through the plasma generator 6, ultraviolet sensor 9, ozone sensor 10, wind pressure sensor 11, and ozone degrader 13, and is discharged from the air outlet 4. When the wind pressure sensor 11 detects the passing wind pressure data, it sends it to the central control module 12 for judgment. The central control module 12 supplies power to the plasma generator 6 according to the factory-calibrated and stored operating parameters such as voltage, current, and frequency. High-density plasma is generated between the multiple rows of anode wires 7 and multiple cathode plates 8. The plasma disinfects and sterilizes the flowing air and decomposes pollutants. At the same time, the cathode plates 8 adsorb particles of various sizes in the air, and the ozone degrader 13 rapidly degrades the ozone generated along with it into oxygen, and clean and healthy air is discharged from the air outlet 4.

[0041] When the plasma ventilation and purification device of this invention is in operation, the multiple rows of anode wires 7 and multiple cathode plates 8 of the plasma generator 6 will generate plasma and ozone. When the medium, temperature, humidity, or wind pressure of the air in the working environment changes, the density of plasma and ozone will change. The density of the generated plasma is related to the ultraviolet intensity and ozone content. The centralized control module 12 will adjust the output voltage, current, and frequency parameters in real time according to the current ultraviolet intensity and ozone content to achieve the ultraviolet intensity and ozone content range specified by the factory, generally with an ozone content of 0.05-0.16 mg / m³. 3 The amount of ozone emitted through the ozone degrader 13 and the air outlet 4 of this invention is less than 0.02 mg / m³. 3 This also increases the oxygen content in the air.

[0042] Based on the aforementioned plasma ventilation and purification device, the present invention also provides a plasma ventilation and purification method, specifically comprising:

[0043] S1: When air with a certain wind pressure is sent into the air inlet 3, it first passes through the coarse filter 5 to filter out larger particles in the air, and then passes through the plasma generator 6, sensor module 14 and ozone degrader 13 in sequence before being discharged from the air outlet 4.

[0044] S2: The ultraviolet intensity and ozone amount of the plasma generator 6 are detected by the ultraviolet sensor 9 and the ozone sensor 10 respectively and sent to the central control module 12.

[0045] S3: The centralized control module 12 indirectly detects the generated plasma density based on the ultraviolet intensity and ozone content, and adjusts the output working parameters in real time according to the generated plasma density to ensure that the plasma density is the highest and the ozone content is the lowest under different environments; the working parameters include voltage, current and frequency.

[0046] The generation of plasma by air ionization is always accompanied by the production of ozone. The ozone content generated by the plasma ventilation and purification device of this invention is far less than the national standard of 0.16 mg / m³. 3 After passing through the ozone degrader 13, the ozone can be quickly converted into oxygen, and the ozone content in the purified output air is less than 0.02 mg / m³. 3 It also increases the oxygen content of the environment, making the air healthier.

[0047] The factory calibration method for the plasma ventilation and purification device of the present invention is as follows: First, determine the number of anode wires 7 and cathode plates 8 included in the appropriate plasma generator 6 according to the flow rate of the purified air. The larger the air volume, the more anode wires 7 and cathode plates 8 should be equipped. Place the configured number of plasma generators 6 in a constant temperature and humidity test chamber, inject gases with different PM2.5 contents into the test chamber, and measure the voltage, current, frequency, ultraviolet intensity, ozone content, and other data when the air outlet has the best purification effect. After the plasma generator 6 is taken out, the plasma density value is obtained using a plasma density detector. The obtained values ​​are calibrated and written into the CPU of the centralized control module 12 to complete the factory calibration.

[0048] S4: The central control module 12 supplies power to the plasma generator 6 according to the working parameters, so that high-density plasma is generated between the multiple rows of anode wires 7 and multiple cathode plates 8.

[0049] S5: The plasma sterilizes and decomposes pollutants in the flowing air. At the same time, the cathode plate 8 adsorbs particles of all sizes in the air, and the ozone degrader 13 degrades the ozone generated into oxygen, which is then discharged as pure and healthy air from the air outlet.

[0050] The control module 12 of this invention supplies power to the plasma generator 6 according to the factory-calibrated operating parameters based on real-time wind pressure data, ultraviolet intensity, and ozone levels. This ensures that the plasma density is consistently at its highest and the ozone level is lowest under different operating conditions. After one year of use, if the plasma density or ozone level deviates from the factory-calibrated range, the control module 12 will issue an audible and visual alarm. At this point, the lower cover 2 needs to be opened, the coarse filter 5 and cathode plate 8 removed for cleaning, dried, and then reinserted. This allows for safe and energy-efficient maintenance.

[0051] This invention relates to a plasma ventilation and purification device, primarily used for upgrading and retrofitting ventilation ducts, central air conditioning systems, or fresh air systems. It can serve as a replacement for existing low-temperature plasma air purification devices. When airflow occurs, the wind pressure sensor 11 detects it, and the central control module 12 simultaneously starts operating. When auxiliary equipment shuts down, the wind pressure sensor 11 detects it, and the central control module 12 simultaneously shuts down, achieving automatic control and energy-saving and environmentally friendly effects.

[0052] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A plasma ventilation and purification device, comprising: Housing, air inlet, air outlet, coarse filter, plasma generator, sensor module, central control module, and ozone degrader; The air inlet and the air outlet are respectively located on opposite sides of the exterior of the housing; the coarse filter is located inside the housing near the air inlet; the ozone degrader is located inside the housing near the air outlet; the plasma generator, the sensor module, and the control module are located between the coarse filter and the ozone degrader; the plasma generator is located near the coarse filter; the sensor module and the control module are located near the ozone degrader. The plasma generator and the sensor module are both connected to the central control module. The plasma generator includes multiple cathode plates arranged side by side and a row of anode wires between each pair of adjacent cathode plates. Each row of anode wires is formed by a single anode wire wound in a serpentine shape around an insulating frame, with the bends of the serpentine anode wire fixed to the insulating frame. The two ends of each anode wire are connected to allow multiple anode wires to be connected in parallel in the circuit. The cathode plates are connected by metal guide posts. The spacing between adjacent cathode plates is the same. The sensor module includes an ultraviolet sensor, an ozone sensor, and a wind pressure sensor. Multiple cathode plates are integrated and can be extracted; large holes and small holes are distributed on the cathode plates; the large holes and small holes on adjacent cathode plates are staggered; the large hole on the previous cathode plate faces the small hole on the next cathode plate, and the small hole on the previous cathode plate faces the large hole on the next cathode plate. The centralized control module indirectly detects the generated plasma density based on ultraviolet intensity and ozone levels, and adjusts the output operating parameters in real time according to the generated plasma density to ensure that the plasma density is always the highest and the ozone level is the lowest under different environments; the operating parameters include voltage, current and frequency.

2. The plasma ventilation and purification device according to claim 1, characterized in that, The plasma ventilation and purification device outputs air with an ozone content of less than 0.02 mg / m³. 3 .

3. The plasma ventilation and purification device according to claim 1, characterized in that, The plasma ventilation and purification device is installed in ventilation ducts, central air conditioning, or fresh air systems.

4. A plasma ventilation and purification method, characterized in that, Based on the plasma ventilation and purification device according to claim 1; the plasma ventilation and purification method includes: When air with a certain wind pressure is sent into the air inlet, it first passes through a coarse filter to remove larger particles in the air, and then passes through the plasma generator, sensor module and ozone degrader in sequence before being discharged from the air outlet. The intensity of ultraviolet radiation and the amount of ozone in the plasma generator are detected by ultraviolet sensors and ozone sensors, respectively, and the data are sent to the centralized control module. The centralized control module indirectly detects the generated plasma density based on ultraviolet intensity and ozone levels, and adjusts the output operating parameters in real time according to the generated plasma density to ensure that the plasma density is always at its highest and the ozone level is lowest under different environments; the operating parameters include voltage, current and frequency. The central control module supplies power to the plasma generator according to the operating parameters, so that high-density plasma is generated between multiple rows of anode wires and multiple cathode plates; The plasma sterilizes and decomposes pollutants in the air that flows through it. At the same time, the cathode plate adsorbs particles of all sizes in the air, and the ozone degrader degrades the ozone generated into oxygen, which is then discharged as pure and healthy air from the outlet.

5. The plasma ventilation and purification method according to claim 4, characterized in that, The factory calibration method for the plasma ventilation and purification device includes: Configure the number of cathode plates and anode wires in the plasma generator according to the required airflow rate; A number of plasma generators were placed in a constant temperature and humidity test chamber. Air with different PM2.5 contents was injected into the test chamber. The working parameters and corresponding ultraviolet intensity and ozone content data at the best purification effect of the air outlet were measured. After removing the plasma generator from the experimental chamber, the plasma density value was obtained using a plasma density detector. The corresponding operating parameters, ultraviolet intensity, ozone concentration, and plasma density values ​​are calibrated and written into the CPU of the centralized control module.

6. The plasma ventilation and purification method according to claim 4, characterized in that, Also includes: When the centralized control module detects that the plasma density or ozone level deviates from the factory calibration range, it will issue an audible and visual alarm.

7. The plasma ventilation and purification method according to claim 4, characterized in that, Also includes: When the wind pressure sensor detects airflow, the central control module starts up and runs synchronously; when the wind pressure sensor no longer detects wind pressure, the central control module shuts down synchronously.

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