A filter screen sterilization device and air purifier

Abstract

This invention relates to the field of filter-type air purifier technology and proposes a filter sterilization device. The device comprises an outer surface dielectric barrier discharge component and an inner surface dielectric barrier discharge component arranged opposite to each other. Both the outer and inner surface dielectric barrier discharge components have metal mesh openings on their surfaces. The inner surface dielectric barrier discharge component has an airflow port. The outer and inner surface dielectric barrier discharge components generate bactericidal active substances through the metal mesh openings under different voltages. The bactericidal active substances reach the filter screen through the airflow port for sterilization. This method can increase the yield of bactericidal substances while reducing the surface temperature of the discharge electrode and the impact of temperature on the filter screen surface.

Description

Technical Field

[0001] This invention relates to the field of air purification technology, and in particular to a filter sterilization device that uses a filter to sterilize and remove particulate pollutants from the air, thereby improving air quality. Background Technology

[0002] As people's attention to and demand for air quality gradually increases, air purifiers have become an essential item in daily life. Air purifiers, through the application of high-density filters, can effectively remove particulate pollutants from the air, creating a clean and comfortable indoor environment. However, over time, the filters gradually lose their filtering efficiency due to the accumulation of pollutants, necessitating timely filter replacement to maintain the purifier's normal operation.

[0003] Dust gradually accumulates on the filter surface, easily attracting various bacteria and viruses. These microorganisms, present on the filter, can spread indoors through airflow, posing a potential threat to human health. Regular disinfection of the filter is essential to prevent bacterial transmission. Research shows that plasma generated by a surface dielectric barrier discharge device can effectively remove bacteria. This device ionizes oxygen molecules in the air, producing a series of highly effective bactericidal active substances, such as ozone and superoxide ions, thereby effectively inhibiting bacterial growth and spread. However, to achieve 99.99% bacterial elimination on the filter surface, a sufficiently high discharge voltage is required.

[0004] However, excessively high discharge voltages also bring some problems. First, the surface of the discharge electrode may be damaged due to high temperatures. During high-voltage discharge, the surface of the discharge electrode generates high temperatures, which may cause deformation or damage to the electrode material, thus affecting the lifespan and stability of the device. To solve this problem, heat dissipation design or reducing the discharge frequency can be used to lower the temperature of the discharge electrode surface, thereby reducing damage to the device. Second, excessively high voltages increase the energy consumption of the device, posing a challenge to energy conservation and environmental protection. To address the energy consumption issue, measures such as optimizing the discharge current and frequency can be taken to achieve good sterilization effects at lower voltages, thereby reducing energy consumption.

[0005] In conclusion, as air pollution worsens, the need to eliminate bacteria and viruses from air filters is becoming increasingly important. While surface dielectric barrier discharge (SPD) devices can effectively kill bacteria on filter surfaces, issues such as high temperatures and energy consumption must be addressed. Through proper design and optimization, it is possible to reduce the temperature of the discharge electrode and decrease energy consumption while maintaining effective sterilization, thereby providing users with a healthier and more efficient air purifier experience.

[0006] In view of this, the present invention proposes a filter sterilization device and an air purifier containing the structure. Summary of the Invention

[0007] This invention proposes a filter sterilization device that solves the problems of low filter sterilization efficiency and damage to the filter surface caused by excessively high discharge electrode surface temperature in related technologies.

[0008] The technical solution of the present invention is as follows:

[0009] A filter sterilization device, characterized in that the device comprises:

[0010] The outer surface dielectric barrier discharge component and the inner surface dielectric barrier discharge component are arranged opposite to each other;

[0011] Both the outer surface dielectric barrier discharge component and the inner surface dielectric barrier discharge component are provided with metal mesh.

[0012] The inner surface dielectric barrier discharge component is provided with an airflow port;

[0013] The outer surface dielectric barrier discharge component and the inner surface dielectric barrier discharge component generate bactericidal active substances through the metal mesh under different voltages;

[0014] The bactericidal active substance reaches the filter screen through the airflow port to perform sterilization.

[0015] Optionally, an air inlet is provided on the connecting side of the outer surface dielectric barrier discharge component and the inner surface dielectric barrier discharge component.

[0016] Optionally, the electrode voltage of the outer surface dielectric barrier discharge component is higher than the electrode voltage of the inner surface dielectric barrier discharge component.

[0017] Optionally, the filter screen has a cylindrical structure;

[0018] The inner surface dielectric barrier discharge component is an arc surface.

[0019] Optionally, the inner surface dielectric barrier discharge component is provided with a discharge surface, a dielectric layer, the metal mesh, an airflow port, and a high-voltage electrode surface.

[0020] Optionally, the outer surface dielectric barrier discharge component is provided with a discharge surface, a dielectric layer, a metal mesh, and a high-voltage electrode surface.

[0021] Optionally, the metal mesh of the inner surface dielectric barrier discharge component is provided with the airflow port.

[0022] Optionally, the air inlet is used for cooling the outer surface dielectric barrier discharge component and the inner surface dielectric barrier discharge component.

[0023] Furthermore, the present invention provides an air purifier comprising the filter sterilization device as described above, characterized in that the filter sterilization device is disposed on the outer side of the filter in the air purifier.

[0024] Optionally, the air purifier's filter sterilization device is detachably mounted on the surface of the filter.

[0025] Compared with the prior art, the advantages of the present invention are as follows:

[0026] 1. In this invention, the outer surface dielectric barrier discharge component and the inner surface dielectric barrier discharge component generate bactericidal active substances through the metal mesh. The bactericidal active substances reach the filter screen through the airflow port to sterilize. This design can effectively inhibit the reproduction and spread of bacteria and viruses on the filter screen surface.

[0027] 2. In this invention, the outer surface dielectric barrier discharge component adopts an SDBD device, which uses cold plasma to generate a chemical reaction and produce a sterilization effect. The inner surface dielectric barrier discharge component has a lower voltage and is mainly used to enhance the sterilization effect and protect the filter screen, avoiding damage to the filter screen caused by excessively high temperature or excessive discharge.

[0028] 3. In this invention, the air inlet can guide airflow through the device, increase the sterilization effect, and provide cooling for the outer surface dielectric barrier discharge component and the inner surface dielectric barrier discharge component, ensuring safety and stability.

[0029] 4. In this invention, the design of the double-layer SDBD device can increase the yield of bactericidal substances and reduce the impact of the discharge electrode surface temperature on the filter screen. Attached Figure Description

[0030] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0031] Figure 1 This is a three-dimensional view of the filter sterilization device in an embodiment of the present invention;

[0032] Figure 2 This is a three-dimensional view of the filter sterilization device and the filter in an embodiment of the present invention;

[0033] Figure 3 This is a partial enlarged view of the non-contact side of the inner surface dielectric barrier discharge component in an embodiment of the present invention.

[0034] Figure 4 This is a partial enlarged view of the inner surface dielectric barrier discharge component in an embodiment of the present invention, on the side in contact with the filter screen.

[0035] Figure 5This is a partial enlarged view of the front of the dielectric barrier discharge component on the outer surface in an embodiment of the present invention;

[0036] Figure 6 This is a partial enlarged view of the back side of the dielectric barrier discharge component on the outer surface in an embodiment of the present invention;

[0037] Figure label:

[0038] 1. Outer surface dielectric barrier discharge component; 2. Inner surface dielectric barrier discharge component; 3. Air inlet; 4. Partial marking of the outer surface dielectric barrier discharge component; 5. Partial marking of the inner surface dielectric barrier discharge component; 6. Discharge surface of the inner surface dielectric barrier discharge component; 7. Dielectric layer of the inner surface dielectric barrier discharge component; 8. Metal mesh of the inner surface dielectric barrier discharge component; 9. Air outlet; 10. High voltage electrode surface of the inner surface dielectric barrier discharge component; 11. Discharge surface of the outer surface dielectric barrier discharge component; 12. Dielectric layer of the outer surface dielectric barrier discharge component; 13. Metal mesh of the outer surface dielectric barrier discharge component; 14. High voltage electrode surface of the outer surface dielectric barrier discharge component; 15. Filter screen. Detailed Implementation

[0039] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indicators will also change accordingly.

[0040] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0041] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0042] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0044] Example 1

[0045] Please see Figures 1-6 A filter sterilization device, comprising:

[0046] The outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2 are arranged opposite to each other;

[0047] Both the outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2 are provided with metal mesh 8.

[0048] In addition, the inner surface dielectric barrier discharge component 2 is provided with an airflow port 9;

[0049] The outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2 generate bactericidal active substances through the metal mesh 8 under different voltages;

[0050] It is worth noting that the bactericidal active substance reaches the filter screen 15 through the airflow port 9 for sterilization.

[0051] In detail, the outer surface dielectric barrier discharge component 1 can be an SDBD (Surface Dielectric Barrier Discharge) device, which is also known as a cold plasma device. It is a device commonly used in air treatment, static electricity elimination, chemical reactions and pollutant degradation.

[0052] In this embodiment of the invention, the SDBD device can be used for sterilizing the filter of an air purifier.

[0053] In detail, the SDBD device uses a high voltage applied to the dielectric layer to generate a weak photoionization layer on the electrode surface, forming a dielectric barrier discharge region. When the voltage is applied above the threshold, electrons in the gas are accelerated and collide with gas molecules, resulting in ionization and excitation reactions. The free electrons, ions and excited-state particles generated by these reactions can chemically react with toxic gases, bacteria and other harmful substances in the air, thereby achieving the effect of purification and sterilization.

[0054] Furthermore, the SDBD device consists of two electrodes, typically one being a solid electrode with a spacer layer and the other being a movable electrode located above it. Gas is filled between the two electrodes, and an alternating voltage is applied. When the voltage rises to a certain level, a radiative electric field and free electrons are generated, forming cold plasma. Under the action of the cold plasma, strong collisions between electrons and positive ions are generated, exciting energy such as light, heat, and sound waves, thereby enabling a series of applications. The two electrodes are usually arranged in a parallel plate structure, which can be metal electrodes or conductive coatings. The dielectric layer is usually made of insulating materials, such as ceramics or glass. The dielectric layer covers the space between the electrodes, forming a closed air handling area.

[0055] In detail, the SDBD device works by applying a high-voltage power supply to the electrodes, forming a weak photoionization region on the electrode surface through the dielectric layer. This region has a high electric field strength, accelerating electrons and causing them to collide with air molecules, resulting in ionization and excitation reactions. The free electrons, ions, and excited-state particles produced by these reactions can chemically react with harmful substances in the air, converting them into harmless substances or deactivating them. Simultaneously, the SDBD device also generates ozone and other reactive oxygen species, which have bactericidal and disinfecting effects.

[0056] In detail, the SDBD device has advantages such as high efficiency in purification and sterilization, low energy consumption, high stability, no need for additional media, and strong controllability.

[0057] Please see Figure 1The outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2, which are arranged opposite to each other, refer to the double-layer SDBD device required by the filter sterilization device. Figure 1 Mark 4 in the figure represents a local identifier of the outer surface dielectric barrier discharge component; Figure 1 Mark 5 in the figure represents a local identifier of the inner surface dielectric barrier discharge component.

[0058] In detail, the dual-layer SDBD device is used to increase the yield of bactericidal substances while reducing the surface temperature of the discharge electrode and the effect of temperature on the filter surface.

[0059] Furthermore, the outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2 can generate bactericidal substances under electrode voltage.

[0060] It should be noted that the electrode voltage of the outer surface dielectric barrier discharge component 1 is higher than that of the inner surface dielectric barrier discharge component 2 because a higher electrode voltage is applied to the outer surface dielectric barrier discharge component 1.

[0061] In detail, the outer surface dielectric barrier discharge component 1 of the filter sterilization device can generate strong and stable plasma discharge. These plasma discharges excite oxygen molecules to generate active oxygen species, such as oxygen ions and ozone, which have strong sterilization capabilities. Meanwhile, the inner surface dielectric barrier discharge component 2 has a lower electrode voltage and is mainly used to enhance the sterilization effect and protect the filter. It can provide additional sterilization without damaging the filter, while avoiding damage to the filter caused by excessively high temperatures or excessive discharge.

[0062] In detail, by setting different electrode voltages for the dielectric barrier discharge components on the outer and inner surfaces, the device can ensure safety and stability while maintaining efficient sterilization, thus providing a more reliable air purification effect and extending the device's service life.

[0063] Please see Figure 1 An air inlet 3 is provided on the connecting side of the outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2. This design is to achieve better sterilization effect and protect the filter.

[0064] It should be noted that the air inlet 3 is provided on the connecting side of the outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2 because the air inlet 3 is located on the side of the device and can guide external air into the device. When the air enters the device through the air inlet, it will pass over the outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2.

[0065] This design serves several purposes:

[0066] By guiding airflow through the device, airborne particles will come into contact with the dielectric barrier discharge component 1, thereby promoting the generation and migration of plasma. This increases the chance of plasma coming into contact with bacteria and viruses in the air, thus improving the sterilization effect.

[0067] The air inlet 3 is used to cool down the outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2. This means that near the air inlet 3, the airflow can carry away some of the heat generated by the discharge component, improve the temperature distribution of the discharge component, and reduce its temperature. This helps to prevent high temperature from damaging the filter surface and enables the device to operate stably for a longer period of time.

[0068] Please see Figure 2 The filter 15 has a cylindrical structure and is typically used to filter and capture particulate matter and pollutants in the air.

[0069] Among them, cylindrical filter screens are the most common shape and are suitable for many filtration applications. Their advantages are that they have a large filtration surface area and can provide a uniform flow distribution. In addition, the cylindrical structure makes it easy to clean and replace the filter screen.

[0070] Furthermore, the fact that the inner surface dielectric barrier discharge component 2 is an arc surface means that the filter screen 15 has a cylindrical shape. That is, the inner surface dielectric barrier discharge component 2 is described as an arc surface, which means that the shape of the inner component is an arc, which matches the cylindrical structure of the filter screen. The arc surface design can ensure that there is an appropriate contact area between the discharge component and the filter screen to achieve a better sterilization effect.

[0071] In addition, by designing the inner surface dielectric barrier discharge component 2 as an arc surface, a more uniform and consistent plasma discharge distribution can be provided, so that the entire filter surface can come into contact with the bactericidal substance. This helps to improve the sterilization efficiency of the device and ensures the effective elimination of microorganisms such as bacteria and viruses in the air.

[0072] In summary, the filter in the device has a cylindrical structure, while the inner surface dielectric barrier discharge component has an arc-shaped design to ensure uniform sterilization of the filter surface.

[0073] Please see Figure 3 and Figure 4 The inner surface dielectric barrier discharge component 2 is provided with a discharge surface 6, a dielectric layer 7, a metal mesh 8, an airflow port 9, and a high-voltage electrode surface 10.

[0074] Furthermore, the inner surface dielectric barrier discharge component 2 is provided with an airflow port 9.

[0075] in, Figure 3 and Figure 4 This is a partial enlarged view of the inner surface dielectric barrier discharge component 2.

[0076] In detail, the discharge surface 6 is a region on the inner surface dielectric barrier discharge component 2 used to generate plasma discharge. The discharge surface is typically in the form of a plane or a curved surface. When a high-voltage power supply is applied, the electric field formed on the discharge surface causes the ionization and excitation of air molecules, thereby generating plasma discharge.

[0077] In detail, the dielectric layer 7 is located above the discharge surface 6. It is a dielectric isolation layer during the discharge process, playing a role in isolation and insulation. The dielectric layer 7 can be made of insulating material or special dielectric material to ensure the stability and safety of the discharge area.

[0078] In detail, the metal mesh 8 is a layer of metal mesh structure located below the dielectric layer 7. It can provide support and a stable structure, and also helps to uniformly distribute the plasma in the discharge area. Through the metal mesh 8, the discharge area can better contact the filter surface, enhancing the sterilization effect. Typically, a metal material with good conductivity, such as stainless steel or copper, is used. The design and arrangement of the metal mesh 8 can be optimized according to specific requirements to achieve better support and uniform plasma distribution.

[0079] In detail, the airflow port 9 refers to the ventilation hole or channel opened on the inner surface dielectric barrier discharge component 2. It helps to guide the airflow through the device, promotes air circulation and flow. Through the airflow port, the air can pass smoothly through the discharge component and the metal mesh 8, ensuring contact between the discharge area and the surface of the filter screen 15, and providing a better sterilization effect.

[0080] In detail, the high-voltage electrode 10 is a region on the inner surface dielectric barrier discharge component 2, used to provide the high-voltage power required for discharge. The high-voltage electrode 10 is usually located below the discharge surface 6 or the dielectric layer 7 to ensure that sufficient electric field strength and voltage are provided during discharge.

[0081] Furthermore, the metal mesh 8 of the inner surface dielectric barrier discharge component 2 is provided with an airflow port 9, which means that the airflow port can be set at the metal mesh 8 of the inner surface dielectric barrier discharge component 2. This design allows air to flow smoothly into the inner surface dielectric barrier discharge component 2 through the airflow port when it flows through the metal mesh 8, increasing the chance of contact with plasma and improving the sterilization effect.

[0082] This design can achieve the following functions:

[0083] The airflow port 9 allows air to smoothly enter the inner surface dielectric barrier discharge component 2 and pass through the metal mesh 8, which helps maintain good airflow and prevents dust, dirt, bacteria, etc. from accumulating on the filter surface;

[0084] Air vents can also play a role in heat dissipation. For example, in air purifiers, air vents are set up through the dielectric barrier discharge component on the inner surface to promote the dissipation of heat generated inside the device and prevent overheating.

[0085] The air outlet 9 can generate airflow, which, through the filtering effect of the metal mesh 8, further filters out harmful substances such as particulate matter and bacteria in the air, thereby improving the filtration effect.

[0086] In summary, the discharge surface 6, dielectric layer 7, metal mesh 8, airflow port 9, and high-voltage electrode surface 10 work together to enable the inner surface dielectric barrier discharge component to generate plasma discharge and treat pollutants in the air through the airflow port.

[0087] In this embodiment of the invention, the reference Figure 5 and Figure 6 As shown, the outer surface dielectric barrier discharge component 1 is provided with a discharge surface 11, a dielectric layer 12, a metal mesh 13, and a high voltage electrode surface 14.

[0088] In detail, the discharge surface 11 is a region on the inner surface dielectric barrier discharge component 1 where discharge occurs. The discharge surface 11 is typically a plane or a curved surface used to generate plasma discharge.

[0089] In detail, the dielectric layer 12 is located above the discharge surface 11. It is a dielectric isolation layer during the discharge process. The dielectric layer 12 can be an insulating material or a special dielectric material, used to isolate the discharge area from other parts.

[0090] In detail, the metal mesh 13 is a layer of metal mesh structure located below the dielectric layer 12, which can provide a supportive and stable structure, and also helps to uniformly distribute the plasma in the discharge region.

[0091] In detail, the high-voltage electrode 14 is a region on the inner surface dielectric barrier discharge component 1, used to provide the high-voltage power required for discharge. The high-voltage electrode 14 is usually located below the discharge surface 11 or the dielectric layer 12.

[0092] In summary, the structural differences between the outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2 lie in the presence or absence of an airflow port 9 and the component shape design.

[0093] Furthermore, both the outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2 are provided with metal mesh holes 8.

[0094] In detail, surface dielectric barrier discharge utilizes the sharp edges of the metal mesh 8 to generate bactericidal active substances to kill bacteria on the filter surface. The metal mesh 8 refers to small holes or grid-like structures of a certain size and shape set on the surfaces of the outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2. These holes are made of metal material.

[0095] In detail, the sharp edges of the metal mesh 8 can be used to generate corona discharge or plasma discharge. When corona discharge or plasma discharge occurs, the surrounding oxygen and moisture may be converted into active substances with bactericidal properties, such as ozone. These active substances can effectively kill bacteria on the surface of the filter.

[0096] Of course, the specific size and shape of the metal mesh 8 can be designed and manufactured according to actual needs. In general, the size of the metal mesh will be selected according to the size of the target bacteria to ensure the sterilization effect.

[0097] Example 2

[0098] To better adapt to specific space constraints and system layouts, this embodiment of the invention also provides a filter 15 structure that differs from that of Embodiment 1.

[0099] Specifically, filter 15 can be a square filter.

[0100] In detail, the square filter screens can better adapt to specific space constraints and system layouts. Compared with cylindrical structures, they can generate a larger filtration surface area in a limited space, thereby increasing the filter screen's processing capacity and filtration efficiency.

[0101] Specifically, compared to cylindrical structures, square filters can generate a larger filtration surface area within a limited space. This is because square filters have straight edges, which can more effectively utilize every inch of a given space. By increasing the filtration surface area, the filter can handle more fluid and perform more thorough filtration, thereby improving processing capacity and filtration efficiency.

[0102] Another advantage of square filters is that they are easier to stack, which means that multiple filters can be stacked together vertically or horizontally to further increase the filtration area. Since the edges of square filters are straight, their stacking arrangement is more compact and stable, and it is not easy for gaps or instability to occur. This stacking arrangement can achieve a larger filtration surface area in a limited space, improving the throughput and filtration effect.

[0103] In summary, square filters have significant advantages when adapting to specific space constraints and system layouts. They can generate a larger filtration surface area within a limited space, thereby improving the filter's processing capacity and filtration efficiency.

[0104] In addition, their straight edges make them easy to stack and arrange, further increasing the filtration area. Therefore, square filters are one of the more suitable options when faced with specific space constraints or system layouts.

[0105] Example 3

[0106] To improve airflow and uniform air distribution, this embodiment of the invention also provides a filter 15 structure that differs from that of Embodiment 1 and Embodiment 2.

[0107] Specifically, filter 15 can be an oval-shaped filter.

[0108] In detail, an elliptical filter is one possible option, as its geometry is elliptical.

[0109] The elliptical filter screen has the following advantages:

[0110] Larger filtration surface area: Compared to cylindrical filters, elliptical filters can provide a larger filtration surface area within a given height and width range. This means that more air can be filtered and sterilized, thereby improving processing capacity and efficiency.

[0111] Streamlined features: The elliptical filter has a streamlined geometry, which helps air flow and distribute evenly on the filter surface. Compared to geometry with sharper corners, the rounded contour of the elliptical filter reduces airflow resistance and makes it easier for air to pass through the filter, thus improving the sterilization effect.

[0112] Adapting to special space constraints or layouts: Some special spaces or system layouts may not be suitable for traditional cylindrical filters. The geometry of elliptical filters can better adapt to these constraints, allowing the filters to be arranged in a limited space and provide the required filtration and sterilization functions.

[0113] In detail, by employing an elliptical filter screen, the design of the filter device can be optimized and its performance and adaptability improved to meet specific space constraints and system requirements.

[0114] In addition, the contact surface between the elliptical filter and the inner surface dielectric barrier discharge component 2 will also change accordingly. The position of the discharge component needs to be adjusted according to the specific size and layout of the elliptical filter to ensure that the discharge area can cover the entire surface of the filter, thereby achieving the bactericidal effect against bacteria and viruses.

[0115] In summary, elliptical filters have the advantages of a large filtration surface area, streamlined shape, and adaptability to special space constraints or layouts, which can improve the effectiveness and performance of filter devices, thereby providing a cleaner and healthier indoor air environment.

[0116] Example 4

[0117] This invention also provides an air purifier based on a filter sterilization device, characterized in that a filter sterilization device is provided on the outside of the filter in the air purifier.

[0118] In detail, the filter sterilization device is located on the outside of the filter and can be used to sterilize bacteria and other microorganisms in the air passing through the filter. This design aims to further improve the sterilization effect of the air purifier through the filter sterilization device.

[0119] The filter sterilization device inside the air purifier can be found in [reference]. Figures 1-6 A filter sterilization device, comprising:

[0120] The outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2 are arranged opposite to each other;

[0121] Both the outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2 are provided with metal mesh 8.

[0122] In addition, the inner surface dielectric barrier discharge component 2 is provided with an airflow port 9;

[0123] The outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2 generate bactericidal active substances through the metal mesh 8 under different voltages;

[0124] It is worth noting that the bactericidal active substance reaches the filter screen 15 through the airflow port 9 for sterilization.

[0125] In detail, the outer surface dielectric barrier discharge component 1 can be an SDBD (Surface Dielectric Barrier Discharge) device, which is also known as a cold plasma device. It is a device commonly used in air treatment, static electricity elimination, chemical reactions and pollutant degradation.

[0126] In this embodiment of the invention, the SDBD device can be used for sterilizing the filter of an air purifier.

[0127] In detail, the SDBD device uses a high voltage applied to the dielectric layer to generate a weak photoionization layer on the electrode surface, forming a dielectric barrier discharge region. When the voltage is applied above the threshold, electrons in the gas are accelerated and collide with gas molecules, resulting in ionization and excitation reactions. The free electrons, ions and excited-state particles generated by these reactions can chemically react with toxic gases, bacteria and other harmful substances in the air, thereby achieving the effect of purification and sterilization.

[0128] Furthermore, the SDBD device consists of two electrodes, typically one being a solid electrode with a spacer layer and the other being a movable electrode located above it. Gas is filled between the two electrodes, and an alternating voltage is applied. When the voltage rises to a certain level, a radiative electric field and free electrons are generated, forming cold plasma. Under the action of the cold plasma, strong collisions between electrons and positive ions are generated, exciting energy such as light, heat, and sound waves, thereby enabling a series of applications. The two electrodes are usually arranged in a parallel plate structure, which can be metal electrodes or conductive coatings. The dielectric layer is usually made of insulating materials, such as ceramics or glass. The dielectric layer covers the space between the electrodes, forming a closed air handling area.

[0129] In detail, the SDBD device works by applying a high-voltage power supply to the electrodes, forming a weak photoionization region on the electrode surface through the dielectric layer. This region has a high electric field strength, accelerating electrons and causing them to collide with air molecules, resulting in ionization and excitation reactions. The free electrons, ions, and excited-state particles produced by these reactions can chemically react with harmful substances in the air, converting them into harmless substances or deactivating them. Simultaneously, the SDBD device also generates ozone and other reactive oxygen species, which have bactericidal and disinfecting effects.

[0130] In detail, the SDBD device has advantages such as high efficiency in purification and sterilization, low energy consumption, high stability, no need for additional media, and strong controllability.

[0131] Please see Figure 1 The outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2, which are arranged opposite to each other, refer to the double-layer SDBD device required by the filter sterilization device.

[0132] In detail, the dual-layer SDBD device is used to increase the yield of bactericidal substances while reducing the surface temperature of the discharge electrode and the effect of temperature on the filter surface.

[0133] Furthermore, the outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2 can generate bactericidal substances under electrode voltage.

[0134] It should be noted that the electrode voltage of the outer surface dielectric barrier discharge component 1 is higher than that of the inner surface dielectric barrier discharge component 2 because a higher electrode voltage is applied to the outer surface dielectric barrier discharge component 1.

[0135] In detail, the outer surface dielectric barrier discharge component 1 of the filter sterilization device can generate strong and stable plasma discharge. These plasma discharges excite oxygen molecules to generate active oxygen species, such as oxygen ions and ozone, which have strong sterilization capabilities. Meanwhile, the inner surface dielectric barrier discharge component 2 has a lower electrode voltage and is mainly used to enhance the sterilization effect and protect the filter. It can provide additional sterilization without damaging the filter, while avoiding damage to the filter caused by excessively high temperatures or excessive discharge.

[0136] In detail, by setting different electrode voltages for the dielectric barrier discharge components on the outer and inner surfaces, the device can ensure safety and stability while maintaining efficient sterilization, thus providing a more reliable air purification effect and extending the device's service life.

[0137] Please see Figure 1 An air inlet 3 is provided on the connecting side of the outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2. This design is to achieve better sterilization effect and protect the filter.

[0138] It should be noted that the air inlet 3 is provided on the connecting side of the outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2 because the air inlet 3 is located on the side of the device and can guide external air into the device. When the air enters the device through the air inlet, it will pass over the outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2.

[0139] This design serves several purposes:

[0140] By guiding airflow through the device, airborne particles will come into contact with the dielectric barrier discharge component 1, thereby promoting the generation and migration of plasma. This increases the chance of plasma coming into contact with bacteria and viruses in the air, thus improving the sterilization effect.

[0141] The air inlet 3 is used to cool down the outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2. This means that near the air inlet 3, the airflow can carry away some of the heat generated by the discharge component, improve the temperature distribution of the discharge component, and reduce its temperature. This helps to prevent high temperature from damaging the filter surface and enables the device to operate stably for a longer period of time.

[0142] Please see Figure 2The filter 15 has a cylindrical structure and is typically used to filter and capture particulate matter and pollutants in the air.

[0143] Among them, cylindrical filter screens are the most common shape and are suitable for many filtration applications. Their advantages are that they have a large filtration surface area and can provide a uniform flow distribution. In addition, the cylindrical structure makes it easy to clean and replace the filter screen.

[0144] Furthermore, the fact that the inner surface dielectric barrier discharge component 2 is an arc surface means that the filter screen 15 has a cylindrical shape. That is, the inner surface dielectric barrier discharge component 2 is described as an arc surface, which means that the shape of the inner component is an arc, which matches the cylindrical structure of the filter screen. The arc surface design can ensure that there is an appropriate contact area between the discharge component and the filter screen to achieve a better sterilization effect.

[0145] In addition, by designing the inner surface dielectric barrier discharge component 2 as an arc surface, a more uniform and consistent plasma discharge distribution can be provided, so that the entire filter surface can come into contact with the bactericidal substance. This helps to improve the sterilization efficiency of the device and ensures the effective elimination of microorganisms such as bacteria and viruses in the air.

[0146] In summary, the filter in the device has a cylindrical structure, while the inner surface dielectric barrier discharge component has an arc-shaped design to ensure uniform sterilization of the filter surface.

[0147] Please see Figure 3 and Figure 4 The inner surface dielectric barrier discharge component 2 is provided with a discharge surface 6, a dielectric layer 7, a metal mesh 8, an airflow port 9, and a high-voltage electrode surface 10.

[0148] Furthermore, the inner surface dielectric barrier discharge component 2 is provided with an airflow port 9.

[0149] in, Figure 3 and Figure 4 This is a partial enlarged view of the inner surface dielectric barrier discharge component 2.

[0150] In detail, the discharge surface 6 is a region on the inner surface dielectric barrier discharge component 2 used to generate plasma discharge. The discharge surface is typically in the form of a plane or a curved surface. When a high-voltage power supply is applied, the electric field formed on the discharge surface causes the ionization and excitation of air molecules, thereby generating plasma discharge.

[0151] In detail, the dielectric layer 7 is located above the discharge surface 6. It is a dielectric isolation layer during the discharge process, playing a role in isolation and insulation. The dielectric layer 7 can be made of insulating material or special dielectric material to ensure the stability and safety of the discharge area.

[0152] In detail, the metal mesh 8 is a layer of metal mesh structure located below the dielectric layer 7. It provides support and a stable structure, and also helps to uniformly distribute the plasma in the discharge area. Through the metal mesh, the discharge area can make better contact with the filter surface, enhancing the sterilization effect. Typically, a metal material with good conductivity, such as stainless steel or copper, is used. The design and arrangement of the metal mesh 8 can be optimized according to specific requirements to achieve better support and uniform plasma distribution.

[0153] In detail, the airflow port 9 refers to the ventilation hole or channel opened on the inner surface dielectric barrier discharge component 2. It helps to guide the airflow through the device, promotes air circulation and flow. Through the airflow port, the air can pass smoothly through the discharge component and the metal mesh, ensuring contact between the discharge area and the filter surface, and providing a better sterilization effect.

[0154] In detail, the high-voltage electrode 10 is a region on the inner surface dielectric barrier discharge component 2, used to provide the high-voltage power required for discharge. The high-voltage electrode 10 is usually located below the discharge surface 6 or the dielectric layer 7 to ensure that sufficient electric field strength and voltage are provided during discharge.

[0155] Furthermore, the metal mesh 8 of the inner surface dielectric barrier discharge component 2 is provided with airflow ports 9, meaning that the airflow ports can be located at the metal mesh of the inner surface dielectric barrier discharge component. This design allows air to flow smoothly into the inner surface dielectric barrier discharge component through the airflow ports when passing through the metal mesh, increasing the chance of contact with plasma and improving the sterilization effect.

[0156] This design can achieve the following functions:

[0157] The airflow port 9 allows air to smoothly enter the inner surface dielectric barrier discharge component 2 and pass through the metal mesh 8, which helps maintain good airflow and prevents dust, dirt, bacteria, etc. from accumulating on the filter surface;

[0158] Air vents can also play a role in heat dissipation. For example, in air purifiers, air vents are set up through the dielectric barrier discharge component on the inner surface to promote the dissipation of heat generated inside the device and prevent overheating.

[0159] The air outlet 9 can generate airflow, which, through the filtering effect of the metal mesh 8, further filters out harmful substances such as particulate matter and bacteria in the air, thereby improving the filtration effect.

[0160] In summary, the discharge surface 6, dielectric layer 7, metal mesh 8, airflow port 9, and high-voltage electrode surface 10 work together to enable the inner surface dielectric barrier discharge component to generate plasma discharge and treat pollutants in the air through the airflow port.

[0161] In this embodiment of the invention, the reference Figure 5 and Figure 6 As shown, the outer surface dielectric barrier discharge component 1 is provided with a discharge surface 11, a dielectric layer 12, a metal mesh 13, and a high voltage electrode surface 14.

[0162] In detail, the discharge surface 11 is a region on the inner surface dielectric barrier discharge component 1 where discharge occurs. The discharge surface 11 is typically a plane or a curved surface used to generate plasma discharge.

[0163] In detail, the dielectric layer 12 is located above the discharge surface 11. It is a dielectric isolation layer during the discharge process. The dielectric layer 12 can be an insulating material or a special dielectric material, used to isolate the discharge area from other parts.

[0164] In detail, the metal mesh 13 is a layer of metal mesh structure located below the dielectric layer 12, which can provide a supportive and stable structure, and also helps to uniformly distribute the plasma in the discharge region.

[0165] In detail, the high-voltage electrode 14 is a region on the inner surface dielectric barrier discharge component 1, used to provide the high-voltage power required for discharge. The high-voltage electrode 14 is usually located below the discharge surface 11 or the dielectric layer 12.

[0166] In summary, the structural differences between the outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2 lie in the presence or absence of an airflow port 9 and the component shape design.

[0167] Furthermore, both the outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2 are provided with metal mesh holes 8.

[0168] In detail, surface dielectric barrier discharge utilizes the sharp edges of the metal mesh 8 to generate bactericidal active substances to kill bacteria on the filter surface. The metal mesh 8 refers to small holes or grid-like structures of a certain size and shape set on the surfaces of the outer surface dielectric barrier discharge component 1 and the inner surface dielectric barrier discharge component 2. These holes are made of metal material.

[0169] In detail, the sharp edges of the metal mesh 8 can be used to generate corona discharge or plasma discharge. When corona discharge or plasma discharge occurs, the surrounding oxygen and moisture may be converted into active substances with bactericidal properties, such as ozone. These active substances can effectively kill bacteria on the surface of the filter.

[0170] Of course, the specific size and shape of the metal mesh 8 can be designed and manufactured according to actual needs. In general, the size of the metal mesh will be selected according to the size of the target bacteria to ensure the sterilization effect.

[0171] Specifically, the filter screen 15 can also be a square filter screen.

[0172] In detail, the square filter screens can better adapt to specific space constraints and system layouts. Compared with cylindrical structures, they can generate a larger filtration surface area in a limited space, thereby increasing the filter screen's processing capacity and filtration efficiency.

[0173] Specifically, compared to cylindrical structures, square filters can generate a larger filtration surface area within a limited space. This is because square filters have straight edges, which can more effectively utilize every inch of a given space. By increasing the filtration surface area, the filter can handle more fluid and perform more thorough filtration, thereby improving processing capacity and filtration efficiency.

[0174] Another advantage of square filters is that they are easier to stack, which means that multiple filters can be stacked together vertically or horizontally to further increase the filtration area. Since the edges of square filters are straight, their stacking arrangement is more compact and stable, and it is not easy for gaps or instability to occur. This stacking arrangement can achieve a larger filtration surface area in a limited space, improving the throughput and filtration effect.

[0175] In summary, square filters have significant advantages when adapting to specific space constraints and system layouts. They can generate a larger filtration surface area within a limited space, thereby improving the filter's processing capacity and filtration efficiency.

[0176] In addition, their straight edges make them easy to stack and arrange, further increasing the filtration area. Therefore, square filters are one of the more suitable options when faced with specific space constraints or system layouts.

[0177] In detail, the filter sterilization device of the air purifier is detachably mounted on the surface of the filter 15, so that the filter sterilization device can be easily installed and removed to ensure the maintenance, cleaning and replacement of the sterilization device.

[0178] In addition, by placing the filter sterilization device on the filter surface, it is ensured that the air comes into contact with the filter sterilization device before passing through the filter, thereby effectively killing bacteria and other microorganisms in the air.

[0179] Furthermore, when the sterilization device needs to be cleaned or replaced, it can be easily removed from the filter screen for maintenance or replacement with a new filter sterilization device. This detachable design not only facilitates the maintenance of the sterilization device, but also ensures a tight fit between the sterilization device and the filter screen to provide a more efficient sterilization effect.

[0180] Specifically, filter 15 can also be an oval-shaped filter.

[0181] In detail, an elliptical filter is one possible option, as its geometry is elliptical.

[0182] The elliptical filter screen has the following advantages:

[0183] Larger filtration surface area: Compared to cylindrical filters, elliptical filters can provide a larger filtration surface area within a given height and width range. This means that more air can be filtered and sterilized, thereby improving processing capacity and efficiency.

[0184] Streamlined features: The elliptical filter has a streamlined geometry, which helps air flow and distribute evenly on the filter surface. Compared to geometry with sharper corners, the rounded contour of the elliptical filter reduces airflow resistance and makes it easier for air to pass through the filter, thus improving the sterilization effect.

[0185] Adapting to special space constraints or layouts: Some special spaces or system layouts may not be suitable for traditional cylindrical filters. The geometry of elliptical filters can better adapt to these constraints, allowing the filters to be arranged in a limited space and provide the required filtration and sterilization functions.

[0186] In detail, by employing an elliptical filter screen, the design of the filter device can be optimized and its performance and adaptability improved to meet specific space constraints and system requirements.

[0187] In addition, the contact surface between the elliptical filter and the inner surface dielectric barrier discharge component 2 will also change accordingly. The position of the discharge component needs to be adjusted according to the specific size and layout of the elliptical filter to ensure that the discharge area can cover the entire surface of the filter, thereby achieving the bactericidal effect against bacteria and viruses.

[0188] In summary, elliptical filters have the advantages of a large filtration surface area, streamlined shape, and adaptability to special space constraints or layouts, which can improve the effectiveness and performance of filter devices, thereby providing a cleaner and healthier indoor air environment.

[0189] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0190] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A filter screen sterilization device, characterized by, The device includes: An outer surface dielectric barrier discharge component and an inner surface dielectric barrier discharge component are arranged opposite to each other. The outer surface dielectric barrier discharge component and the inner surface dielectric barrier discharge component are both provided with metal mesh holes on their surfaces. The inner surface dielectric barrier discharge component is provided with an airflow port. The outer surface dielectric barrier discharge component and the inner surface dielectric barrier discharge component generate bactericidal active substances through the metal mesh holes under different voltages. The bactericidal active substances reach the filter screen through the airflow port for sterilization. The inner surface dielectric barrier discharge component is provided with a discharge surface, a dielectric layer, the metal mesh, an airflow port, and a high-voltage electrode surface; The outer surface dielectric barrier discharge component is provided with a discharge surface, a dielectric layer, a metal mesh, and a high-voltage electrode surface; An air inlet is provided on the connecting side of the outer surface dielectric barrier discharge component and the inner surface dielectric barrier discharge component; The metal mesh of the inner surface dielectric barrier discharge component is provided with the airflow port; Through the metal mesh of the inner surface dielectric barrier discharge component, the discharge area of ​​the inner surface dielectric barrier discharge component comes into contact with the surface of the filter screen.

2. The screen sterilizing apparatus according to claim 1, wherein The electrode voltage of the outer surface dielectric barrier discharge component is higher than that of the inner surface dielectric barrier discharge component.

3. The filter sterilization device as described in claim 1, characterized in that, The filter screen has a cylindrical structure, and the inner surface dielectric barrier discharge component has an arc surface.

4. The filter sterilization device as described in claim 2, characterized in that, The air inlet is used for cooling the outer surface dielectric barrier discharge component and the inner surface dielectric barrier discharge component.

5. The air cleaner comprising the filter screen sterilizing device according to claim 1, characterized in that, The air purifier has a filter sterilization device as described in claim 1 installed on the outside of the filter.

6. The air cleaner of claim 5, wherein, The air purifier's filter sterilization device is detachably mounted on the surface of the filter.

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