An electrostatic filter electrode sheet, an electrostatic filter assembly, and an electrostatic precipitator filter

Abstract

The application belongs to the technical field of air purification, and particularly relates to a static electricity filtering electrode sheet, a static electricity filtering assembly and a static electricity dust removal filter. The static electricity filtering electrode sheet provided by the application is an integrally formed ion conductive electrode sheet, and a conductive functional layer does not need to be covered on the surface of a base material through a coating, electroplating or other process. The integrally formed ion conductive electrode sheet provided by the application can maintain the surface resistance value after multiple water washing and dust cleaning, the high-voltage static electricity field and the air purification effect are maintained, and the durability is good. On the other hand, the ion conductive electrode sheet also has a spark resistance function, and will not spark in humid air or even when soaked in water. On the other hand, two potential access holes are arranged on two sides, so that the air purification effect of the large-size electrode sheet is good. Thus, the technical problem of low performance of the conductive plastic sheet in the prior art is solved.

Description

Technical Field

[0001] This application belongs to the field of air purification technology, and particularly relates to an electrostatic filter electrode, an electrostatic filter assembly, and an electrostatic dust removal filter. Background Technology

[0002] Electrostatic filtration components can purify the air, kill harmful microorganisms such as viruses and bacteria, and remove particulate matter such as dust. The principle is as follows: parallel plates or arc-shaped electrodes are arranged at certain intervals. After being connected to high and low potentials at intervals, high-potential electrodes and low-potential electrodes are formed. A high-voltage electrostatic field is formed between the high-potential electrodes and the low-potential electrodes. When the air passes through the high-voltage electrostatic field, the harmful microorganisms in the air have their cell membranes broken and their genetic material destroyed. They are also adsorbed to the low-potential electrodes along with the statically charged dust and other particulate matter. The static electricity is released on the low-potential electrodes and they are collected.

[0003] Early electrostatic filtration components used conductive metal materials as electrode plates. However, conductive metal materials not only have drawbacks such as high cost, difficult processing, and heavy weight, but also easily lead to accidents such as electric shock and electric sparks, affecting safety. They require additional dielectric barrier discharge insulation structures, which also makes the assembly of electrostatic filtration components cumbersome. Compared to conductive metal materials, non-metallic substrates such as plastics, glass, ceramics, and wood do not require additional dielectric barrier discharge insulation structures, and their conductivity can be modified to make them conductive materials for electrode plates. Non-metallic substrates also have some advantages; for example, non-metallic plastic substrates are not only lower in cost, but also easier and more flexible to process, suitable for various processing techniques. They can be processed into flat sheets, sheets with specific curvatures or composite curved surfaces, and irregularly shaped components, etc., according to requirements. However… Plastic itself is not suitable as a direct electrode for electrostatic filters. Traditional processes use conductive ink to modify the plastic to make it conductive, that is, coating a plastic sheet with a layer of conductive ink to create a conductive plastic sheet as the electrode for the electrostatic filter assembly. However, coating the plastic sheet with conductive ink increases the process steps, and the surface of the conductive plastic sheet needs to be cleaned after a period of air purification. With repeated cleaning, it is difficult to ensure the comprehensiveness and uniformity of the conductive ink coating, which affects the conductivity stability of the electrode sheet. This makes it impossible to guarantee the stability of the high voltage electrostatic field between the high-potential electrode sheet and the low-potential electrode sheet, and the air purification effect of the electrostatic filter assembly is easily degraded. At the same time, the electrode sheet is prone to arcing and sparking, causing safety hazards. Therefore, the performance of current electrostatic filter electrode sheets is relatively low, and it is necessary to develop a new generation of high-performance electrostatic filter electrode sheets. Utility Model Content

[0004] In view of this, this application provides an electrostatic filter electrode sheet, an electrostatic filter assembly, and an electrostatic dust removal filter to solve the technical problem of low performance of electrode sheets in the prior art.

[0005] The first aspect of this application provides an electrostatic filter electrode sheet, which is an integrally formed ion-conducting electrode sheet.

[0006] Preferably, the integrally formed ion-conductive electrode sheet is selected from at least one of integrally formed ion-conductive plastic electrode sheets, integrally formed ion-conductive glass electrode sheets, integrally formed ion-conductive ceramic electrode sheets, and integrally formed ion-conductive wood electrode sheets.

[0007] Preferably, the integrally formed ion-conducting electrode sheet is a single-layer ion-conducting electrode sheet structure or a structure of a non-metallic inner layer and an ion-conducting outer layer, wherein the non-metallic inner layer is a plastic inner layer, a glass inner layer, a ceramic inner layer, or a wood inner layer.

[0008] Preferably, the ion-conductive electrode sheet is made of an ion-conductive modified medium and a non-metallic substrate through an integral molding process.

[0009] Preferably, the ion-conductive modified medium is an anionic or cationic antistatic agent of the small molecule type, an antistatic agent of the polymer type, or an ionic liquid.

[0010] Preferably, the ion-conductive modified medium is in the form of at least one of particles, sheets, fibers, tubes, and liquids.

[0011] Preferably, the surface resistance of the integrally formed ion-conducting electrode sheet is 10 Ω·cm. 7 ~10 13 Ω.

[0012] Preferably, the integrally formed ion-conducting electrode sheet is a high-potential electrode sheet.

[0013] Preferably, the integrally formed ion-conducting electrode sheet has a length of 10~1000mm, a width of 5~150mm, and a thickness of 0.2~3mm.

[0014] Preferably, the integrally formed ion-conducting electrode sheet has a length of 50~500mm, a width of 5~80mm, and a thickness of 0.35~1.2mm.

[0015] Preferably, the integrally formed ion-conducting electrode sheet with a length of 200 mm or more has at least one potential access hole on each side along its length direction or one potential access hole on one side.

[0016] Preferably, the integrally formed ion-conducting electrode sheet with a length of less than 200 mm has a potential access hole on one side along its length direction or at least one potential access hole on each side.

[0017] Preferably, the potential access holes on both sides of the integrally formed ion-conducting electrode sheet are on the same straight line, or there is a height difference along the width direction of the integrally formed ion-conducting electrode sheet itself.

[0018] Preferably, the height difference is 1~20mm.

[0019] Preferably, the height difference is 8~9mm.

[0020] Preferably, the diameter of the potential access hole is 1~5mm.

[0021] Preferably, the shape of the potential access hole is at least one of semi-circular, U-shaped, and square.

[0022] A second aspect of this application provides an electrostatic filtration assembly, including a high-voltage power supply component, a high-potential electrode sheet, and a low-potential electrode sheet;

[0023] A set of high-potential electrode sheets and a set of low-potential electrode sheets are arranged in parallel with equal spacing;

[0024] The high-potential power supply component is connected to the high-potential electrode plate, and the low-potential power supply component is connected to the low-potential electrode plate.

[0025] The high-potential electrode sheet is selected from the integrally formed ion-conducting electrode sheet described in the first aspect.

[0026] Preferably, the low-potential electrode sheet is an integrally formed electronically conductive electrode sheet or a non-integral-formed electronically conductive electrode sheet.

[0027] Preferably, the surface resistance of the low-potential electrode is lower than that of the high-potential electrode.

[0028] Preferably, the surface resistance of the low-potential electrode is 10~10. 8 Ω.

[0029] Preferably, the voltage output by the high-voltage power supply component is 1000~15000V.

[0030] Preferably, the integrally formed ion-conducting electrode sheet with a length of 200 mm or more has potential access holes on both sides that are electrically connected by conductive lines.

[0031] A third aspect of this application provides an electrostatic dust removal filter, including the electrostatic filtration assembly described in the second aspect.

[0032] Preferably, the electrostatic dust removal filter includes an air conditioner, an air purifier, or a fresh air system.

[0033] Compared with the prior art, the electrostatic filter electrode sheet provided in this application has at least the following beneficial effects:

[0034] 1. The electrostatic filter electrode sheet provided in this application is an integrally formed ion-conductive electrode sheet, and the structure is improved. In addition to avoiding the defects of complex process of traditional coating and other methods for preparing conductive sheets, the electrostatic filter electrode sheet provided in this application also has many performance advantages such as anti-spark, water-washing resistance and high conversion efficiency, thereby improving the performance of the electrostatic filter electrode sheet.

[0035] 2. The electrostatic filter electrode sheet provided in this application can be used to construct an electrostatic filter assembly by arranging high-potential electrode sheets and low-potential electrode sheets at equal intervals in parallel. By setting the high resistance of the high-potential electrode sheets and the low resistance of the low-potential electrode sheets and selecting the conductive modified medium, the electrostatic filter assembly constructed by the electrostatic filter electrode sheet has better performance. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 A schematic diagram illustrating the principle of air purification using the electrostatic filter assembly provided in this application;

[0038] Figure 2 This is a schematic diagram of the first type of electrostatic filter electrode sheet provided in this application;

[0039] Figure 3 This is a schematic diagram of the second type of electrostatic filter electrode sheet provided in this application;

[0040] Figure 4 This is a schematic diagram of the third type of electrostatic filter electrode provided in this application;

[0041] Figure 5 This is a schematic diagram of the fourth type of electrostatic filter electrode provided in this application;

[0042] Figure 6 A schematic diagram of the fifth type of electrostatic filter electrode provided in this application;

[0043] Figure 7 A schematic diagram showing the water wash resistance test results of the electrostatic filter electrode sheet provided in this application;

[0044] Figure 8 This is a schematic diagram illustrating the spark resistance performance test of the electrostatic filter electrode sheet provided in this application. Detailed Implementation

[0045] This application provides an electrostatic filter electrode, an electrostatic filter assembly, and an electrostatic dust removal filter to solve the technical problem of low performance of electrode sheets in the prior art.

[0046] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "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 the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a replaceable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0049] In view of the current shortcomings of low performance of electrostatic filter electrode sheets, this application provides an electrostatic filter electrode sheet, which is an integrally formed ion-conducting electrode sheet;

[0050] The conductive modifiers doped in electrostatic filter electrodes can be divided into two categories: electronically conductive modifiers and ionicly conductive modifiers. Electronically conductive modifiers include carbon-based and metal-based modifiers, while ionicly conductive modifiers include ionic liquids, small-molecule antistatic agents (cationic and anionic), and polymeric antistatic agents. Electronically conductive electrodes, made by doping electrostatic filter electrodes with electronically conductive modifiers, exhibit fast response and rapid charge transfer because the mechanism of electronic conduction is mainly electron transition. Since electrons have extremely small mass, they only need to overcome weak scattering resistance during transfer. In contrast, ionicly conductive electrodes, made by doping electrostatic filter electrodes with ionicly conductive modifiers, have slower response rates and lower migration rates than electrons because ions have a certain mass and need to overcome binding resistance. However, they can still continuously conduct and transfer charge. This differs from electronically conductive electrodes. The electrostatic filter electrode provided in this application for use in the field of electrostatic filtration utilizes... Using ion-conductive electrode sheets reduces the risk of sparking and arcing that electronically conductive electrode sheets are prone to. Furthermore, the ion-conductive electrode sheets used in this application are "integratedly molded." "Integrated molding" refers to directly fabricating a complete conductive plastic sheet from a non-metallic substrate doped or mixed with ion-conductive modified media through a single processing step or continuous, uninterrupted processes. This eliminates the need for secondary processes such as coating or electroplating to cover the non-metallic sheet with an ion-conductive functional layer. The integrated ion-conductive electrode sheet has a single, integral structure without a surface-covered conductive functional layer, thus distinguishing it from traditional "non-integrated" electrode sheets with a surface-covered conductive functional layer. The integrated electrode sheet exhibits better durability and its resistance value does not change after cleaning due to dust accumulation, maintaining the high-voltage electrostatic field and air purification effect. Therefore, the electrostatic filter electrode sheet provided in this application is a durable, high-performance conductive plastic sheet, solving the technical problem of low performance in existing electrode sheets.

[0051] As an optional technical solution, for the selection of non-metallic substrates in the electrostatic filter electrode sheet provided in this application, non-metallic substrates such as plastic, glass, ceramic, and wood can be selected; as for the selection of plastic substrates, since the electrode sheet is relatively thin (less than 1 mm) and large in size, the plastic substrate should be a thermoplastic resin with a Young's modulus of not less than 1 GPa; such as polypropylene, polyethylene terephthalate, acrylonitrile-butadiene-styrene copolymer, polystyrene, polybutylene terephthalate, polyoxymethylene, etc. Polypropylene (PP) has a Young's modulus of around 1-2 GPa, polyethylene terephthalate (PET) around 2.5-3.5 GPa, acrylonitrile-butadiene-styrene copolymer (ABS) around 1.8-2.8 GPa, polystyrene (PS) around 2.0-3.0 GPa, polybutylene terephthalate (PBT) around 2.2-3.0 GPa, and polyoxymethylene (POM). Using these plastic substrates is beneficial for preparing thinner and larger electrostatic filter electrode sheets.

[0052] As an optional technical solution, the structure provided in this application is an integrally formed ion-conducting electrode sheet without a conductive functional layer covering the surface; it can be a single-layer ion-conducting electrode sheet structure or a structure with a non-metallic inner layer and an ion-conducting outer layer; the single-layer ion-conducting electrode sheet structure provided in this application refers to the doping of ion-conducting modified media into the interior and surface of the integrally formed ion-conducting electrode sheet, and its preparation process can be used to form an integrally formed ion-conducting electrode sheet from a non-metallic substrate doped with ion-conducting modified media through processes such as extrusion molding, injection molding, thermoforming, die-cutting, and 3D printing; while the non-metallic inner layer provided in this application Taking polypropylene as an example, the structure of the inner layer and the ion-conductive surface layer can be achieved by loading polypropylene granules and polypropylene granules containing ion-conductive modified media into the two barrels of an injection molding machine, respectively. Through a two-material injection molding (two-color injection molding) integrated molding process, a polypropylene inner layer and an ion-conductive surface layer are formed in a single injection molding process in the mold, thus forming an integrated ion-conductive electrode sheet. At the same time, the two-color injection molding process can also be used to prepare other non-metallic inner layers and ion-conductive surface layers of integrated ion-conductive electrode sheets, or other integrated molding processes, such as co-extrusion processes, can be used to prepare non-metallic inner layers and ion-conductive surface layers of integrated ion-conductive electrode sheets.

[0053] As an optional technical solution, the integrally formed ion-conducting electrode sheet provided in this application has a surface resistance of 10 Ω·cm. 7 ~10 13 Ω represents a high-potential electrode; its surface resistance can specifically be 10 Ω. 7 Ω, 10 8 Ω, 10 9 Ω, 10 10 Ω, 10 11 Ω, 10 12Ω, 10 13 Ω.

[0054] As an optional technical solution, the integrally formed ion-conducting electrode sheet provided in this application has a length of 10~1000mm, a width of 5~150mm, and a thickness of 0.2~3mm; or the integrally formed ion-conducting electrode sheet has a length of 50~500mm, a width of 5~80mm, a thickness of 0.35~1.2mm, and the color can be transparent or black.

[0055] As an optional technical solution, a schematic diagram of the first integrally formed ion-conducting electrode sheet provided in this application is shown below. Figure 2 As shown, the conductive electrode sheet is injection molded. Its basic length dimension is 283.2 mm, with an allowable variation range of 283.0 mm to 283.4 mm. The basic width dimension is 49 mm, with an allowable variation range of 48.5 mm to 49 mm. A potential access hole with a diameter of 2.3 mm is provided on each side of the integrally molded ion-conductive electrode sheet along its length. The distance from the potential access hole to the center line of the integrally molded ion-conductive electrode sheet along its width is 141.5 mm to 141.7 mm. There is a height difference of 8-9 mm between the potential access holes on the left and right sides of the integrally molded ion-conductive electrode sheet along its width. Additionally, nine identical mounting grooves are equally spaced on each side of the integrally molded ion-conductive electrode sheet along its width to facilitate the fixing of mounting strips, adhesive, and other assembly components.

[0056] As an optional technical solution, a schematic diagram of the second integrally formed ion-conducting electrode sheet provided in this application is shown below. Figure 3 As shown, the electrode is formed by punching, with a length of 285.4 mm and a width of 60 mm. A schematic diagram of the third type of integrally formed ion-conducting electrode sheet provided in this application is shown below. Figure 4 As shown, this is an ion-conducting electrode sheet with a length of 186.3 mm and a width of 14.9 mm.

[0057] As an optional technical solution, a schematic diagram of the fourth integrally formed ion-conducting electrode sheet provided in this application is shown below. Figure 5 As shown, with Figure 2 The difference between the first type of integrally formed ion-conducting electrode sheet shown is that the positions of the first potential access hole and the second potential access hole are adjusted, with the potential access holes positioned on both sides of the ion-conducting electrode sheet along its width direction. Other specifications and dimensions are consistent with the first type of integrally formed ion-conducting electrode sheet. For the fifth type of integrally formed ion-conducting electrode sheet provided in this application, a schematic diagram is shown below. Figure 6 As shown, with Figure 2The difference between the first type of integrally formed ion-conducting electrode sheet shown is that the positions of the first potential access hole and the second potential access hole are adjusted, and the two potential access holes are adjusted to one side of the ion-conducting electrode sheet along its own width direction. Other specifications and dimensions are the same as the first type of integrally formed ion-conducting electrode sheet.

[0058] and Figure 2 Compared to the first type of integrally molded ion-conducting electrode sheet shown, the fourth and fifth types of integrally molded ion-conducting electrode sheets provided in this application, by providing two potential access holes, can effectively alleviate the voltage drop of large-size electrostatic filter conductive plastic sheets with higher resistance values; please refer to Figure 5 When only one potential access hole is set on the left or right side of the electrostatic filter conductive plastic sheet and connected to a high-voltage power supply, the voltage drop U = the resistance value R × L of the electrostatic filter conductive plastic sheet. However, after setting two potential access holes, the voltage drop U1 on one side of the electrostatic filter conductive plastic sheet is equal to the resistance value R × L1 of the electrostatic filter conductive plastic sheet, and the voltage drop U1 is less than the voltage drop U. The voltage drop from the other potential access hole to one side of the electrostatic filter conductive plastic sheet is also less than the voltage drop U. Compared with setting one potential access hole on one side of a large-sized electrostatic filter conductive plastic sheet with high resistance, which easily generates a large voltage drop U between the two sides of the electrostatic filter conductive plastic sheet, setting two potential access holes can effectively reduce the voltage drop from the potential access hole to one side, such as the voltage drop U1 being less than the voltage drop U. This setting of setting the first and second potential access holes on the electrostatic filter conductive plastic sheet effectively alleviates the influence of the large voltage drop U on both sides on the stability of the high-voltage electrostatic field and improves the air purification effect.

[0059] As an optional technical solution, this application provides an electrostatic filter assembly, including a high-voltage power supply component, a high-potential electrode sheet, and a low-potential electrode sheet; a set of high-potential electrode sheets and a set of low-potential electrode sheets are arranged in parallel with equal spacing, and the high-potential of the high-voltage power supply component is connected to the high-potential electrode sheet, and the low-potential of the high-voltage power supply component is connected to the low-potential electrode sheet. The high-potential electrode sheet is selected from the integrally formed ion-conducting electrode sheet described in the first aspect, wherein the number of the set of high-potential electrode sheets and the set of low-potential electrode sheets can be any positive integer between 2 and 1000.

[0060] The low-potential electrode sheet in the electrostatic filtration assembly provided in this application has a wide range of options. It can be an electronically conductive electrode sheet or an ionically conductive electrode sheet, and its structure can be an integrally formed electrode sheet or a non-integral formed electrode sheet. "Non-integral formed electrode sheet" refers to an electrode sheet with a conductive functional layer covering its surface. Since the low-potential electrode sheet in the electrostatic filtration assembly serves as a charge outlet and needs to quickly remove charge, the low-potential electrode sheet should be an electronically conductive electrode sheet, and its resistance value should be set lower than that of the high-potential electrode sheet. For example, the surface resistance of the low-potential electrode sheet can be set to 10~10. 8Ω, for example 10 1 Ω, 10 2 Ω, 10 3 Ω, 10 4 Ω, 10 5 Ω, 10 6 Ω, 10 7 Ω, 10 8 Ω; Meanwhile, since the low-potential electrode and high-potential electrode in the electrostatic filter assembly are fixed and cannot be easily disassembled and washed separately, the low-potential electrode needs to have good water resistance. Therefore, the low-potential electrode should be an integrally molded electronic conductive electrode to avoid the situation where the conductive functional layer covering the surface of the "non-integral molded electrode" falls off.

[0061] As an optional technical solution, for a specific application of an electrostatic filtration component in an electrostatic dust removal filter product, the electrostatic dust removal filter utilizes its own airflow and power supply system to integrate the electrostatic filtration component into the air circulation path, outputting purified air. A schematic diagram illustrating its air purification principle is shown below. Figure 1 As shown; electrostatic dust removal filters can be used in air conditioners, air purifiers, or fresh air systems.

[0062] The integrally formed ion-conducting electrode sheet provided in this application will be described in detail below with reference to embodiments and experimental examples.

[0063] Example 1

[0064] This embodiment provides a method for preparing an electrostatic filter electrode sheet, which includes the steps of preparing a matrix resin with a doped conductive modified medium and the step of integrally molding the electrode sheet.

[0065] The steps for preparing the matrix resin of the doped conductive modified dielectric include:

[0066] PELESTAT 6500 and PP (polypropylene) granules as the matrix resin were mixed and then processed by screw extrusion to prepare a matrix resin with a conductive modified medium, namely, antistatic conductive plastic granules. The equipment and process parameters of the screw extrusion process are shown below:

[0067] Screw extruder parameters: number of dies: 21, main machine speed: 550±30Hz, feed speed: 15±5Hz, main machine current: 240±20A, screen aperture: 4MM, filter mesh: 60 mesh 2 layers and 120 mesh 1 layer;

[0068] Process parameters of the screw extruder: Zone 1: 100℃, Zone 2: 210℃, Zone 3: 210℃, Zone 4: 210℃, Zone 5: 200℃, Zone 6: 190℃, Zone 7: 190℃, Zone 8: 190℃, Zone 9: 190℃, Die head: 210℃, Extruded conductive plastic strip water passage length: 3±1M, Water temperature: 35±15℃, Vacuum: 0.07±0.02MPa.

[0069] The steps for fabricating an electrode sheet using integral molding include:

[0070] After obtaining antistatic conductive plastic granules through a screw extruder, an integrally formed electrode sheet is prepared using the antistatic conductive plastic granules as raw material through injection molding. This electrode sheet is an ion-conducting electrode sheet with a surface resistivity of 10. 9 The Ω has a length of 280mm, a width of 50mm, and a thickness of 0.8mm. It has a potential access hole with a diameter of 2.3mm on each side, namely a first potential access hole and a second potential access hole, for connecting high-voltage power supply components.

[0071] Example 2

[0072] This embodiment provides a method for preparing an electrostatic filter electrode sheet, which includes the steps of preparing a matrix resin doped with a conductive modified medium and the step of integrally molding the electrode sheet.

[0073] The steps for preparing the matrix resin of the doped conductive modified dielectric include:

[0074] Conductive carbon black and PP (polypropylene) matrix resin granules are mixed and then processed by screw extrusion to prepare a matrix resin containing conductive modified media, namely conductive carbon black plastic granules. The equipment and process parameters of the screw extrusion process are shown below:

[0075] Screw extruder parameters: number of dies: 21, main machine speed: 550±30Hz, feed speed: 15±5Hz, main machine current: 240±20A, screen aperture: 4MM, filter mesh: 60 mesh 2 layers and 120 mesh 1 layer;

[0076] Process parameters of the screw extruder: Zone 1: 100℃, Zone 2: 210℃, Zone 3: 210℃, Zone 4: 210℃, Zone 5: 200℃, Zone 6: 190℃, Zone 7: 190℃, Zone 8: 190℃, Zone 9: 190℃, Die head: 210℃, Extruded conductive plastic strip water passage length: 3±1M, Water temperature: 35±15℃, Vacuum: 0.07±0.02MPa.

[0077] The steps for fabricating an electrode sheet using integral molding include:

[0078] After obtaining conductive carbon black plastic granules through a screw extruder, an integrally formed electrode sheet is prepared using the conductive carbon black plastic granules as raw material through injection molding. This electrode sheet is an electronically conductive electrode sheet with a surface resistivity of 10 Ω·cm. 9 The Ω has a length of 280mm, a width of 50mm, and a thickness of 0.8mm. It also has a potential access hole with a diameter of 2.3mm on one side for connecting high-voltage power supply components.

[0079] Example 3

[0080] This embodiment provides a method for preparing an electrostatic filter electrode sheet. The difference between this method and that in Embodiment 1 is that the length of the electrode sheet prepared by the injection molding process is changed in the step of integral molding of the electrode sheet, including four types of electrostatic filter electrode sheets with lengths of 150mm, 200mm, 250mm and 300mm.

[0081] Example 4

[0082] This embodiment provides a method for preparing an electrostatic filter electrode sheet. The difference between this method and Embodiment 3 is that, in the step of integrally molding the electrode sheet, the number of potential access holes in the electrode sheet prepared by the injection molding process is changed. Potential access holes are only provided on one side of the four types of electrostatic filter electrode sheets with lengths of 150mm, 200mm, 250mm, and 300mm.

[0083] Example 5

[0084] This embodiment provides a method for preparing an electrostatic filter electrode sheet. The difference between this method and that in Embodiment 1 is the step of integrally molding the electrode sheet.

[0085] In this embodiment, the step of integrally molding the electrode sheet includes:

[0086] After obtaining antistatic conductive plastic granules through a screw extruder, the antistatic conductive plastic granules and the matrix resin PP polypropylene granules are used as raw materials and loaded into the two barrels of a two-material injection molding machine. A one-piece electrode sheet is then prepared through a two-material injection molding process. This electrode sheet is an ion-conductive electrode sheet, consisting of an inner PP polypropylene sheet and a PP polypropylene surface layer doped with an ion-conductive modified medium. Its surface resistivity is 10 Ω·cm. 9 The Ω has a length of 280mm, a width of 50mm, and a thickness of 0.8mm. It has a potential access hole with a diameter of 2.3mm on each side, namely a first potential access hole and a second potential access hole, for connecting high-voltage power supply components.

[0087] Example 6

[0088] This embodiment provides a method for preparing an electrostatic filter conductive sheet. The difference between this method and that of Embodiment 5 is that the surface resistance is adjusted in the step of integrally molding the conductive plastic sheet, resulting in an integrally molded conductive plastic sheet with a surface resistance of 10 Ω·cm. 11 Ω.

[0089] Experimental Example 1

[0090] This experimental example tests the performance of the electrode sheets provided in Examples 1, 2, and 6. The performance tests include water wash resistance test and spark resistance test.

[0091] The sample used in the water-wash resistance test was the electrode sheet provided in Example 6. The water washing process followed the washing procedure in the national standard GB / T24249-2009 for antistatic cleanroom fabrics. The washing results are as follows: Figure 7 As shown, the surface resistance remained at 10^11Ω after 20 cycles. After the electrode sheet provided in Example 1 accumulated dust during a period of operation, it maintained stable conductivity after multiple cleanings, thus maintaining the high voltage electrostatic field and air purification effect.

[0092] The samples used in the spark resistance test were the electrode sheets provided in Examples 1 and 2. The test procedure involved immersing the electrode sheet provided in Example 1 in water for a short-circuit test and detecting its leakage current. The current value was found to be 4.9 μA, and after disconnecting the middle section, the current value was 8.8 μA, far below the non-sparking safety value of <30 μA. This indicates that the electrode sheet provided in Example 1 has spark resistance and good safety. Furthermore, the electrode sheets provided in Examples 1 and 2 were assembled into an electrostatic filter assembly with a spacing of 0.8~2.2 mm and connected to a 6000V voltage. The anti-sparking performance was tested, and the results are shown in Table 1. As can be seen from Table 1, the electrode sheet provided in Example 2 is prone to generating sparks, while the electrostatic filter assembly assembled with the electrode sheet provided in Example 1 is not prone to generating sparks at a spacing of 0.8 to 2.2 mm. However, the electrode sheet provided in Example 2 has obvious sparks and short circuits at spacings of 0.8 mm and 1 mm, and may also generate sparks when the spacing exceeds 1 mm. Furthermore, the electrostatic filter assembly assembled with the electrode sheet provided in Example 1 has a high conversion efficiency, which can reach 98%, that is, the particulate clean air delivery rate (PCADR) reaches 98%.

[0093] Table 1: Results of Spark Resistance Test

[0094]

[0095] Experiment Example 2

[0096] In this experimental example, Examples 3-4 provide electrode sheets for performance testing. The performance test involves assembling the electrode sheets provided in Examples 3-4 into electrostatic filter assemblies. The electrode sheets are arranged in parallel with equal spacing of 1.4 mm. After being connected to a 6000V high-voltage power supply at intervals, the conversion efficiency performance is tested. The performance test results are shown in Table 2. As can be seen from the performance test results in Table 2, under the same specifications and dimensions, the four electrode sheets provided in Example 3 have higher conversion efficiency. This is because, compared to the electrode sheets provided in Example 4, the electrode sheet provided in Example 6 has a potential access hole on each side, which effectively alleviates the high conversion efficiency of the electrode sheet. The voltage drop generated by the resistance stabilizes the high-voltage electrostatic field of the purified air, improving the air purification capacity and conversion efficiency, i.e., the particulate clean air delivery rate (PCADR) can reach 98%. As can be further seen from Table 2, when the electrode sheet length provided in Example 4 is 150mm, the side opposite the potential access hole still maintains a certain end voltage, thereby maintaining a certain conversion efficiency. However, when the electrode sheet length is 200mm, the end voltage decays severely, causing the conversion efficiency to drop rapidly. Therefore, when preparing large-sized electrode sheets, such as those with a length greater than or equal to 200mm, a potential access hole should be provided on each side.

[0097] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An electrostatic filter electrode sheet, characterized in that, It is an integrally molded ion-conducting electrode sheet.

2. The electrostatic filter electrode sheet according to claim 1, characterized in that, The integrally formed ion-conductive electrode sheet is selected from at least one of integrally formed ion-conductive plastic electrode sheets, integrally formed ion-conductive glass electrode sheets, integrally formed ion-conductive ceramic electrode sheets, and integrally formed ion-conductive wood electrode sheets.

3. The electrostatic filter electrode sheet according to claim 1, characterized in that, The integrally formed ion-conducting electrode sheet can be a single-layer ion-conducting electrode sheet structure or a structure consisting of a non-metallic inner layer and an ion-conducting outer layer.

4. The electrostatic filter electrode sheet according to claim 1, characterized in that, The ion-conductive electrode sheet is made of an ion-conductive modified medium and a non-metallic substrate through an integral molding process.

5. The electrostatic filter electrode sheet according to claim 1, characterized in that, The surface resistance of the integrally formed ion-conducting electrode sheet is 10. 7 ~10 13 Ω.

6. The electrostatic filter electrode sheet according to claim 1, characterized in that, The integrally formed ion-conducting electrode sheet is a high-potential electrode sheet.

7. The electrostatic filter electrode sheet according to claim 1, characterized in that, The integrally formed ion-conducting electrode sheet has a length of 10~1000mm, a width of 5~150mm, and a thickness of 0.2~3mm.

8. The electrostatic filter electrode sheet according to claim 1, characterized in that, The integrally formed ion-conducting electrode sheet with a length of 200 mm or more has at least one potential access hole on each side along its length direction or one potential access hole on one side.

9. An electrostatic filter electrode sheet according to claim 1, characterized in that, The integrally formed ion-conducting electrode sheet with a length of less than 200 mm has a potential access hole on one side along its length direction or at least one potential access hole on each side.

10. An electrostatic filtration assembly, characterized in that, Includes high-voltage power supply components, high-potential electrode plates, and low-potential electrode plates; A set of high-potential electrode sheets and a set of low-potential electrode sheets are arranged in parallel with equal spacing; The high-potential power supply component is connected to the high-potential electrode plate, and the low-potential power supply component is connected to the low-potential electrode plate. The high-potential electrode sheet is selected from the integrally formed ion-conducting electrode sheet according to any one of claims 1-9.

11. An electrostatic filter assembly according to claim 10, characterized in that, The low-potential electrode sheet can be an integrally formed electronically conductive electrode sheet or a non-integral-formed electronically conductive electrode sheet.

12. An electrostatic filter assembly according to claim 10, characterized in that, The surface resistance of the low-potential electrode is lower than that of the high-potential electrode.

13. An electrostatic filter assembly according to claim 10, characterized in that, The voltage output of the high-voltage power supply component is 1000~15000V.

14. An electrostatic dust removal filter, characterized in that, Includes an electrostatic filter assembly as described in any one of claims 10-13.

15. An electrostatic dust removal filter according to claim 14, characterized in that, The electrostatic dust removal filter includes air conditioners, air purifiers, or fresh air systems.

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