An electrically enhanced filtration filter medium and an electrically enhanced filtration device having the same

Abstract

The utility model relates to filter device technical field discloses an electric enhancement filter material and electric enhancement filter device who has it in a kind of electric enhancement filter material. Electric enhancement filter material includes: gentle layer, is flat plate shape;Corrugated layer, with gentle layer parallel arrangement, corrugated layer is undulating, along perpendicular to gentle layer direction, the absolute value of the difference of the fluid resistance value of gentle layer and the fluid resistance value of corrugated layer is not more than 20% of the fluid resistance value of gentle layer. Corrugated layer and the honeycomb design of gentle layer combination constitute increase effective filtration area, make electric enhancement filter material have remarkable low resistance advantage under large flow application scene, simultaneously require the fluid resistance value difference between gentle layer and corrugated layer not more than 20%, avoid the filtration efficiency decline caused by local high flow rate, to guarantee electric enhancement filter material each place filtration resistance match, avoid fluid concentrate in low resistance passageway and pass, to guarantee the filtration effect of electric enhancement filter material further.

Description

Technical Field

[0001] This utility model relates to the field of filtration device technology, specifically to an electrically enhanced filter material and an electrically enhanced filtration device having the same. Background Technology

[0002] Electro-enhanced filtration technology is a method to improve filtration performance based on the principle of electrostatic adsorption. By continuously applying an external electric field to the filter material, the filter material can maintain its charge for a long time, overcoming the problem of efficiency decline caused by charge decay over time in traditional electret filters. It can significantly improve the filtration efficiency of ordinary filter materials, while effectively reducing filtration resistance while maintaining the same filtration efficiency.

[0003] Although electro-enhanced filtration theoretically offers superior performance, existing V-type filters employ a wide-spaced electrode arrangement to avoid arcing and safety risks. Maintaining an effective electric field strength with this wide spacing requires extremely high voltage, which can pose safety hazards. Conversely, reducing the voltage may weaken the electro-enhancing effect due to insufficient electric field strength. This limitation on electric field strength restricts the filter pleat height, consequently limiting the filter's efficiency or resistance. Consequently, in high-flow-rate applications, existing electro-enhanced filter cartridges exhibit relatively high resistance. Utility Model Content

[0004] In view of this, the present invention provides an electro-enhanced filter material and an electro-enhanced filter device having the same, so as to solve the problem of excessive resistance of electro-enhanced filter elements in high-flow-rate application scenarios in the prior art.

[0005] In a first aspect, this utility model provides an electrically enhanced filter material, comprising: The flat layer is plate-shaped; The corrugated layer is arranged parallel to the flat layer. The corrugated layer is wavy. The crest of the corrugated layer abuts against one of the adjacent flat layers on one side, and the trough of the corrugated layer abuts against the other adjacent flat layer on the other side. Along the direction of fluid entry in the corrugated layer, the fluid inlet end of the corrugated layer facing one of the flat layers on one side is closed, and the fluid outlet end of the corrugated layer facing the other flat layer is closed. Along the direction perpendicular to the smooth layer, the absolute value of the difference between the fluid resistance value of the smooth layer and the fluid resistance value of the corrugated layer shall not exceed 20% of the fluid resistance value of the smooth layer.

[0006] Both the corrugated layer and the smooth layer serve as filter media, allowing fluid to pass through. The smooth layer can be connected to an external power source to create an electric field, enhancing the electrostatic adsorption force on the filtered material and improving filtration efficiency. During operation, the fluid enters the electro-reinforced filter media parallel to the smooth layer. Because one side of the corrugated layer is closed, the fluid enters from the open position on the other side. Since the other end of the channel between the corrugated layer and the smooth layer corresponding to the open position is closed, the fluid is forced to pass through either the corrugated layer or the smooth layer and enter another channel with an open outlet, completing the filtration process. Compared to traditional parallel plate electrode or conductive rib structures, the honeycomb design composed of corrugated and smooth layers increases the effective filtration area, giving the electro-reinforced filter media a significant low-resistance advantage in high-flow-rate applications. At the same time, the alternating open fluid channel design ensures uniform fluid distribution, and requires that the difference in fluid resistance between the smooth layer and the corrugated layer along the direction perpendicular to the smooth layer does not exceed 20%, avoiding a decrease in filtration efficiency caused by local high flow velocities. This ensures that the filtration resistance is matched throughout the electro-reinforced filter media, preventing fluid from concentrating in low-resistance channels, thereby guaranteeing the filtration effect of the honeycomb structure electro-reinforced filter media.

[0007] In one optional embodiment, the corrugated layer is a dielectric material, and the smooth layer is a conductive material. The smooth layer is suitable for conductive connection with an external power source, and the electric field between adjacent smooth layers satisfies the following condition: 5%E 击穿 <E 平均 <80%E 击穿 E 平均 E represents the average electric field strength between two adjacent gently sloping layers. 击穿 This represents the breakdown electric field strength between two adjacent smooth layers in the corresponding filtered fluid. This is achieved by alternating corrugated and smooth layers, and by connecting an external electrode to each smooth layer, while simultaneously defining E. 平均 Within the preset range, when E 平均 Less than E 击穿 When E is 5%, the electric field between the smooth layers has a poor effect on enhancing the filtration effect; when E 平均 Greater than E 击穿 When the electric field strength reaches 80%, further increases in the electric field no longer significantly improve the filtration effect. Furthermore, during actual operation, abrupt changes in the fluid state, corrugated layer state, or smooth layer state can lead to occasional breakdowns between the smooth layers. By limiting the average electric field strength on adjacent smooth layers to between 5% and 80% of the breakdown electric field strength, the electrically reinforced filter material can operate safely and stably for a long period while maintaining its optimal filtration effect.

[0008] In one optional embodiment, at least five smooth layers are arranged in parallel, with corrugated layers disposed between adjacent smooth layers. The corrugated layers are dielectric materials, and one side of the smooth layer adjacent to the corrugated layer is a conductive or dielectric material, while the other side is a dielectric material. By setting one side of the smooth layer on one side of the corrugated layer to be conductive and the other side to be dielectric, between the five adjacent smooth layers consisting of three conductive and two dielectric materials, the top and bottom smooth layers are connected to an external power source to ensure that the voltages of the two layers are the same, and the middle smooth layer is grounded. This ensures that the electric field strength between the five smooth layers gradually changes from the top and bottom to the middle, thereby automatically maintaining a uniform change in the electric field strength inside the electrically enhanced filter material and reducing the risk of breakdown. When the number of smooth layers is greater than five, the top and bottom two layers and any one of the middle smooth layers are conductive materials, while the remaining smooth layers can be either conductive or dielectric materials, allowing the smooth layers on both sides of the corrugated layer to potentially be dielectric materials. Alternatively, when the number of smooth layers is five, the smooth layers of the top and bottom layers and the second layer on one side are conductive materials, while the remaining smooth layers can be either conductive or dielectric materials.

[0009] In one alternative embodiment, at least two smooth layers are arranged in parallel, with corrugated layers disposed between adjacent smooth layers. The simple alternating layering of corrugated and smooth layers facilitates the assembly of electrically enhanced filter media of different sizes.

[0010] In one alternative embodiment, both the smooth layer and the corrugated layer are arranged in a spiral, serpentine, or concentric circular winding pattern. Single or multiple sets of corrugated and smooth layers can be wound together to easily assemble electrically reinforced filter media of different areas.

[0011] In one alternative embodiment, the closed end of the corrugated layer is made of a dielectric material, and the closed end of the corrugated layer is a filter material or an insulating material. Using a dielectric material for the closed end prevents the formation of a conductive path. The closed end can be a filter material that allows the filtered fluid to pass through, enabling the filtered fluid to flow out from the closed end, thereby increasing the filtration flow rate of the electrically reinforced filter media; alternatively, the closed end can be an insulating material that completely prevents the filtered fluid from passing through.

[0012] In one alternative embodiment, the angle between the line connecting the adjacent crests and troughs of the corrugated layer and the smooth layer is 30° to 60°, which allows the low-resistance properties of the electrically reinforced filter material to be effectively utilized.

[0013] In one alternative implementation, the cross-sectional area of ​​the smooth layer and the corrugated layer perpendicular to the fluid entry direction occupies less than 30% of the total flow channel cross-sectional area, thereby ensuring that the solid portion of the smooth layer and the corrugated layer does not occupy too much of the fluid flow channel area, thus ensuring that the filtered fluid can pass through with low resistance.

[0014] In one alternative implementation, the depth of the corrugated layer is not less than 10 mm along the direction of fluid flow.

[0015] Secondly, this utility model also provides an electro-enhanced filtration device having the electro-enhanced filter material described in this utility model.

[0016] Since the electro-enhanced filtration device includes electro-enhanced filter media and has the same effect as the electro-enhanced filter media, it will not be described in detail here. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in 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 utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of the electrically enhanced filter material provided in the embodiment of this utility model.

[0019] Figure 2 This is a schematic diagram of another electrically enhanced filter material provided in an embodiment of the present invention.

[0020] Figure 3 A schematic cross-sectional view of the fluid-facing end of the electrically enhanced filter media provided in this embodiment of the present invention.

[0021] Figure 4 A schematic cross-sectional view of the back fluid end of the electrically enhanced filter material provided in this embodiment of the utility model.

[0022] Figure 5 This is a schematic diagram of the internal structure of the electrically enhanced filter material provided in an embodiment of the present invention.

[0023] Figure 6 A schematic diagram illustrating the resistance relationship between the smooth layer and the corrugated layer provided in this embodiment of the utility model.

[0024] Figure 7 This is a schematic diagram of the structure for connecting an electric field between adjacent smooth layers, provided in an embodiment of the present invention.

[0025] Figure 8 This is a schematic diagram of the internal electric field structure of the electrically enhanced filter material provided in an embodiment of the present invention.

[0026] Figure 9 This is a schematic diagram of another internal electric field structure of the electrically enhanced filter material provided in an embodiment of the present invention.

[0027] Figure 10 A schematic diagram of the structure of an electrically enhanced filter material provided in another embodiment of this utility model.

[0028] Figure 11 A schematic diagram showing the angular relationship between the smooth layer and the corrugated layer provided in an embodiment of this utility model.

[0029] Figure 12 A schematic diagram showing the cross-sectional area relationship between the smooth layer and the corrugated layer provided in this embodiment of the utility model.

[0030] Explanation of reference numerals in the attached diagram: 1. Smooth layer; 2. Corrugated layer; 3. Closed end; 4. External electrode. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] The following is combined Figures 1 to 12 The following describes embodiments of the present invention.

[0033] According to an embodiment of this utility model, an electrically enhanced filter material is provided, mainly used for material separation and purification, including a smooth layer 1 and a corrugated layer 2. To facilitate connection with an external power source, an external electrode 4 is integrated on the smooth layer 1. The smooth layer 1 is flat, and the corrugated layer 2 is arranged parallel to it. The corrugated layer 2 is wavy, with the crest of the corrugated layer 2 contacting one side of the adjacent smooth layer 1, and the trough of the corrugated layer 2 contacting the other side of the adjacent smooth layer 1. The corrugated layer 2 and the smooth layer 1 are arranged alternately, forming pores that serve as fluid channels. The wave shapes of adjacent corrugated layers 2 can be aligned, i.e., the crest of the upper corrugated layer 2 aligns with the crest of the lower corrugated layer 2, such as... Figure 1 As shown, they can also be arranged in a staggered manner, that is, the crests of the upper corrugated layer 2 are aligned with the troughs of the lower corrugated layer 2, as shown. Figure 2 As shown, or arranged randomly. During normal operation, the overall flow direction of the fluid is perpendicular to the screen, that is, from inside the screen to outside, or from outside the screen to inside. For example... Figure 3 and Figure 4 As shown, Figure 3 This is a cross-sectional view of the fluid-facing end of an electrically reinforced filter media, showing the fluid flowing from outside the image to inside. Figure 4This is a cross-sectional view of the fluid-receiving end of an electro-reinforced filter media, showing the fluid flowing from inside the image to outside. Figure 3 and Figure 4 The same number indicates the two ends of the same pore. Blank spaces represent open pores, while patterns represent closed pores. Along the flow direction of the fluid within the corrugated layer 2, the corrugated layer 2 is closed towards the fluid inlet end of the smooth layer 1 on one side, and closed towards the fluid outlet end of the smooth layer 1 on the other side. That is, at the fluid inlet end, the fluid channel formed between the corrugated layer and the smooth layer is arranged with alternating open and closed sections; at the fluid outlet end, the fluid channel formed between the corrugated layer and the smooth layer is arranged with alternating closed and open sections. Fluid channels with open inlet ends are closed at the outlet end, and fluid channels with closed inlet ends are open at the outlet end. Figure 5 As shown in the diagram, the arrows indicate the direction of fluid flow. Fluid enters through the open channel at the inlet end of corrugated layer 2, and after being filtered by either corrugated layer 2 or the smooth layer 1, flows out through the channel on the other side of the open outlet end of corrugated layer 2. Both corrugated layer 2 and smooth layer 1 serve as filter media, allowing fluid to pass through. Furthermore, in their respective configurations, along the direction perpendicular to smooth layer 1, the absolute value of the difference between the fluid resistance of smooth layer 1 and the fluid resistance of corrugated layer 2 is no greater than 20% of the fluid resistance of smooth layer 1. Figure 6 As shown, the resistance of the smooth layer 1 is measured to be Δ along the direction perpendicular to the smooth layer 1. P 平 At the same flow rate, the resistance of corrugated layer 2 was measured to be Δ. P 瓦 The resistance difference between the smooth layer 1 and the corrugated layer 2 satisfies |(Δ P 平 -Δ P 瓦 ) / Δ P 平 ≤ 20%.

[0034] Both the corrugated layer 2 and the smooth layer 1 serve as filter media, allowing fluid to pass through. The smooth layer 1 can be connected to an external power source to create an electric field, enhancing the electrostatic adsorption force on the filtered material and improving filtration efficiency. During operation, the fluid enters the electro-reinforced filter media parallel to the smooth layer 1. Since one side of the corrugated layer 2 is closed, the fluid enters from the open position on the other side. Because the other end of the channel between the corrugated layer 2 and the smooth layer 1 corresponding to the open position is closed, the fluid is forced to pass through either the corrugated layer 2 or the smooth layer 1 and enter another channel with an open outlet, completing the filtration process. Compared to traditional parallel plate electrode or conductive rib structures, the honeycomb design composed of corrugated layer 2 and smooth layer 1 increases the effective filtration area, giving the electro-reinforced filter media a significant low resistance advantage in high-flow-rate applications. At the same time, the alternating open fluid channel design ensures uniform fluid distribution, and requires that the difference in fluid resistance between smooth layer 1 and corrugated layer 2 along the direction perpendicular to smooth layer 1 does not exceed 20%. This ensures that the filtration resistance is matched throughout the electro-reinforced filter media, avoids fluid concentration in low-resistance areas, and prevents a decrease in filtration efficiency caused by localized high flow velocities within the electro-reinforced filter media, thereby guaranteeing the filtration effect of the honeycomb structure electro-reinforced filter media.

[0035] In this embodiment, at least two smooth layers 1 are arranged in parallel, and corrugated layers 2 are disposed between adjacent smooth layers 1. The simple alternating layering of corrugated layers 2 and smooth layers 1 facilitates the assembly of electrically enhanced filter media of different sizes. The smooth layers 1 can have conductive pathways; they can be entirely conductive, or they can have conductive layers, conductive ribs, conductive networks, etc., used as electrodes to form an electric field, such as... Figure 7 As shown in the figure, the arrows indicate the direction of the electric field. The smooth layer 1 can also exhibit dielectric properties as a whole, that is, it does not have a conductive path and is not electrically connected to the external electrode.

[0036] In one embodiment, such as Figure 8 As shown, the corrugated layers 2 are all dielectric materials, and the smooth layers 1 are all conductive materials. The smooth layers 1 are suitable for conductive connection to an external power source. The smooth layers 1 are electrically connected to the external electrode 4. Adjacent conductive smooth layers 1 are connected to different potentials through the external electrode 4. The entire electro-reinforced filter media has at least two smooth layers 1 made of conductive materials, thereby forming an electric field between the smooth layers 1. The direction of the electric field is not limited, but it is best to ground or have the lowest potential at the edge of the smooth layer 1 for a safer effect. The electric field between every two adjacent smooth layers 1 satisfies the following condition: 5%E 击穿 <E 平均 <80%E 击穿 E 平均 E represents the average electric field strength between two adjacent gentle layers 1. 击穿This represents the breakdown electric field strength between two adjacent smooth layers 1 in the corresponding filtered fluid. E 平均 They may not be identical, but to achieve a more uniform effect, the concentration of each element in the electro-reinforced filter media should be limited. E 平均 The difference is within 50%.

[0037] By alternating between corrugated layers 2 and smooth layers 1, and by connecting external electrodes to each smooth layer 1, while limiting E... 平均 Within the preset range, when E 平均 Less than E 击穿 When E is 5%, the electric field between the smooth layers 1 has a poor effect on enhancing the filtration effect. 平均 Greater than E 击穿 When the electric field strength reaches 80%, further increases in the electric field no longer significantly improve the filtration effect. Furthermore, during actual operation, the electro-reinforced filter media experiences occasional breakdowns between the smooth layers 1 due to abrupt changes in the fluid state, the corrugated layer 2 state, or the smooth layer 1 state. By limiting the average electric field strength on adjacent smooth layers 1 to between 5% and 80% of the breakdown electric field strength, the electro-reinforced filter media can operate safely and stably for a long period while maintaining its optimal filtration effect.

[0038] It should be noted that the average electric field intensity E between two adjacent gentle layers 1 平均 = |U1-U2| / d, where U1 is the external voltage applied to one of the two adjacent smooth layers 1, U2 is the external voltage applied to the other of the two adjacent smooth layers 1, and d is the distance between the two adjacent smooth layers 1. Taking air as the fluid as an example, E 击穿 =31kV / cm, then E 击穿 5% of that is 1.55 kV / cm. E 击穿 80% of the value is 24.8 kV / cm. Table 1 shows the performance test data of the electrically reinforced filter material under different electric field strengths at a wind speed of 2 m / s.

[0039] Table 1

[0040] As can be seen from Table 1, the following conditions are met. E 平均 >5% E 击穿 Only when electricity is applied can the polarization effect be better, that is, the filtration efficiency of the electrically enhanced filter material can be significantly improved after electricity is applied. E平均 <80% E 击穿 This is to ensure safety and prevent breakdown caused by sudden changes in the state of the fluid or filter material.

[0041] In another embodiment, such as Figure 9 As shown, the corrugated layer 2 is a dielectric material, and one side of the smooth layer 1 adjacent to the corrugated layer 2 is a conductive material, while the other side of the smooth layer 1 is a dielectric material. The number of smooth layers 1 made of dielectric material in the entire electrically enhanced filter media is greater than 0. The dielectric smooth layer 1 can be made of a single-layer, single-component porous dielectric material, a single-layer, composite-component porous dielectric material, or a multilayer composite material of multiple single-layer dielectric materials. Single-layer, single-component porous dielectric materials can include polymers such as polypropylene, polyethylene terephthalate, polyethylene, polyurethane, polyethersulfone, polylactic acid, polytetrafluoroethylene, polyvinylidene fluoride, polydimethylsiloxane, polyphenylene sulfide, polyimide, polycarbonate, and polyethylene oxide; natural materials such as biomass, lignin, cellulose, and silk protein; inorganic materials such as glass fiber, silicon-based oxides, alumina, silicon nitride, boron nitride, and silicon carbide; various metal oxides and ceramics; and other novel materials such as metal-organic frameworks (MOFs), covalent organic frameworks (COFs), hydrogen-bonded organic frameworks (HOFs), and two-dimensional materials. Single-layer, composite-component porous dielectric materials can be composites of the above-mentioned single-layer, single-component porous dielectric materials, or, using the above-mentioned single-layer, single-component porous dielectric materials as a base, composite islands of non-conductive metals, conductive carbon materials, conductive polymers, and other conductive materials.

[0042] The corrugated layer 2 exhibits dielectric properties, meaning it lacks conductive pathways. In this case, the material that can be selected for the corrugated layer 2 is the same as that that can be selected for the smooth layer 1 made of dielectric material, and the filtration principle is also the same as that of the dielectric smooth layer 1. The corrugated layer 2 or the smooth layer 1 made of dielectric material is polarized by the electric field formed by the smooth layer 1 made of conductive material, generating induced charges, thereby enhancing the electrostatic capture force on the filtered material and thus improving filtration efficiency.

[0043] By setting one side of the corrugated layer 2 as a conductive material and the other side as a dielectric material, and between the five adjacent flat layers 1 made of three conductive materials and two dielectric materials, the top and bottom flat layers 1 are connected to an external power source to ensure that the voltage of the two layers is the same, and the middle flat layer 1 is grounded, the electric field strength between the five flat layers 1 can be ensured to gradually change from the top and bottom sides to the middle, thereby automatically maintaining the uniform change of the electric field strength inside the electrically enhanced filter material and reducing the risk of breakdown.

[0044] In some other embodiments, when the number of smooth layers is greater than five, the smooth layers of the top and bottom layers and any one of the middle layers are conductive materials, while the remaining smooth layers can be either conductive or dielectric materials, such that the smooth layers on both sides of the corrugated layer may both be dielectric materials. Alternatively, when the number of smooth layers is five, the smooth layers of the top and bottom layers and the second layer on one side are conductive materials, while the remaining smooth layers can be either conductive or dielectric materials.

[0045] In some other embodiments, such as Figure 10 As shown, the smooth layer 1 and the corrugated layer 2 can both be arranged in a spiral, serpentine, or concentric circle pattern. The spiral can be a single spiral, a double spiral, or a flat spiral, and the concentric circles can be perfect circles or ellipses. Single or multiple sets of corrugated layers 2 and smooth layers 1 can be wound together to easily assemble electrically enhanced filter media of different areas.

[0046] In one embodiment, the closed end 3 of the corrugated layer 2 is made of a dielectric material and is a filter material, or the closed end 3 of the corrugated layer 2 is made of an insulating material, that is, the closed end 3 of the corrugated layer 2 is a non-filtering material that cannot be permeated by fluid. Using a dielectric material for the closed end 3 prevents it from forming a conductive path. Inside the electro-reinforced filter media, each fluid channel is open at one end with no material resistance and closed at the other end with material resistance. Adjacent fluid channels at one end of the entire electro-reinforced filter media alternately open or closed. One end of the corrugated layer 2 and the flat layer 1 can be connected to form a natural seal, that is, the corrugated layer 2 is used as the material for the closed end 3 as an outward extension. Other materials can also be used as the sealing material, but they must be dielectric materials and cannot form a conductive path. The closed end 3 can be a filter material that allows the filtered fluid to pass through, allowing the filtered fluid to flow out from the closed end 3, thereby increasing the filtration flow rate of the electro-reinforced filter media; at the same time, the closed end 3 can also be an insulating material that completely prevents the filtered fluid from passing through.

[0047] In one embodiment, the angle between the line connecting adjacent crests and troughs of the corrugated layer 2 and the smooth layer 1 is 30°~60°, allowing the low-resistance properties of the electrically reinforced filter material to be effectively utilized. Figure 11 As shown, the angle formed by the line connecting the adjacent contact points of corrugated layer 2 and smooth layer 1 with smooth layer 1 is denoted as θ. Table 2 shows the resistance performance test data of the electro-reinforced filter media with different θ values ​​at a wind speed of 2 m / s.

[0048] Table 2

[0049] As can be seen from Table 2, in order to effectively utilize the low resistance characteristics of the electro-reinforced filter media, the value of the θ angle can be selected from any value between 30° and 60°, with the optimal value being 45°.

[0050] In one embodiment, the cross-sectional area of ​​the smooth layer 1 and corrugated layer 2, perpendicular to the fluid inlet direction and perpendicular to the smooth layer 1 direction, occupies less than 30% of the total flow channel cross-sectional area. This ensures that the solid portions of the smooth layer 1 and corrugated layer 2 do not occupy too much of the fluid flow channel area, thus ensuring that the filtered fluid can pass through with low resistance. Specifically, since the corrugated layer 2 and smooth layer 1 have a certain thickness, they occupy the channel area on the windward and leeward sides. To ensure low resistance, the area occupied by the smooth layer 1 and corrugated layer 2 on the windward or leeward side of the total flow channel cross-sectional area should be as small as possible relative to S. Figure 12 As shown, S is the ratio of the area of ​​the black part within the gray dashed box to the area of ​​the gray dashed box. Table 3 shows the resistance performance test data of the electrically enhanced filter media at a wind speed of 2 m / s under different values ​​of the ratio between the area occupied by the smooth layer 1 and the corrugated layer 2 on the windward or leeward side of the entire flow channel cross section and the flow channel cross section.

[0051] Table 3

[0052] As can be seen from the table above, in order to ensure that the low-resistance fluid remains in a low-resistance state when passing through the electrically enhanced filter media, the value of S should be less than 30%.

[0053] In one embodiment, the depth of the corrugated layer 2 is not less than 10 mm along the fluid flow direction. The dimension of the electrically reinforced filter media along the macroscopic fluid flow direction is defined as depth L, such as... Figure 5 As shown in the table below, to ensure low resistance, the depth L should be as large as possible. As shown in the table below, when the depth L is small, the V-type pleated filter with the same filtration area exhibits lower resistance. According to the experimental data in the table below, when L is greater than 10 mm, the electro-reinforced filter provided in this embodiment has a significant low-resistance advantage compared to existing V-type pleated filters. Table 4 compares the resistance of electro-reinforced filter media and V-type pleated filters with the same filtration area at an air velocity of 2 m / s.

[0054] Table 4

[0055] According to an embodiment of this utility model, another aspect provides an electro-enhanced filtration device, in which the electro-enhanced filter media described in this utility model is installed. The honeycomb design formed by the combination of corrugated layer 2 and smooth layer 1 increases the effective filtration area, giving the electro-enhanced filter media a significant low-resistance advantage in high-flow-rate applications. To further enhance the filtration effect of the electro-enhanced filter media, a device for charging the filtered material can be installed upstream of the electro-enhanced filter media to enhance electrofiltration performance. The electro-enhanced filtration device can also utilize multiple electro-enhanced filter media connected in series or parallel to enhance overall filtration performance.

[0056] The electro-enhanced filtration device, by installing electro-enhanced filter media, incorporates a multi-stage design of smooth layers 1 for conductivity. This significantly shortens the inter-electrode distance while ensuring safe voltage, effectively enhancing the electric field strength. Compared to the voltage limitation problem caused by excessive electrode distance in existing V-shaped pleated filters, the electro-enhanced filtration device provided in this embodiment can achieve the same or stronger electric field effect at a lower voltage, thereby improving filtration efficiency and reducing energy consumption. Simultaneously, the shortened inter-electrode distance allows for more flexible filter size design; by increasing the number of smooth layers 1 and corrugated layers 2, it can be adapted to high-pleat, high-demand scenarios.

[0057] The electro-enhanced filtration device arranges external electrodes 4 along the sidewall of the smooth layer 1 of the electro-enhanced filter media. With no electrode structure obstructing the height, it overcomes the limitations of traditional filter pleat height. By optimizing the fluid channel layout, it significantly reduces flow resistance in high-flow-rate applications. Compared to traditional parallel plate electrodes or conductive rib structures, the honeycomb design increases the effective filtration area. Simultaneously, the alternating open fluid channel design ensures uniform fluid distribution, avoiding filtration efficiency degradation caused by localized high flow velocities. This structure is particularly suitable for industrial or medical purification systems requiring high flow rates and low resistance.

[0058] In the electro-enhanced filtration device, the electrodes are directly integrated onto the single-layer smooth layer 1 filter media substrate, significantly reducing assembly steps and manufacturing costs. In traditional technologies, parallel plate electrodes or conductive ribs require complex assembly, while the integrated design of the smooth layer 1 with electrodes simplifies the production process.

[0059] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An electrically enhanced filter media, characterized in that, include: The smooth layer (1) is flat and is suitable for forming an electric field by an external power source. A corrugated layer (2) is arranged parallel to the smooth layer (1). The corrugated layer (2) is wavy. The crest of the corrugated layer (2) abuts against one side of the adjacent smooth layer (1), and the trough of the corrugated layer (2) abuts against the other side of the adjacent smooth layer (1). Along the direction of fluid entry into the corrugated layer (2), the corrugated layer (2) is closed towards the fluid inlet end of one side of the smooth layer (1), and the corrugated layer (2) is closed towards the fluid outlet end of the smooth layer (1) on the other side. Along the direction perpendicular to the smooth layer (1), the absolute value of the difference between the fluid resistance value of the smooth layer (1) and the fluid resistance value of the corrugated layer (2) is not greater than 20% of the fluid resistance value of the smooth layer (1).

2. The electrically enhanced filter material according to claim 1, characterized in that, The corrugated layer (2) is a dielectric material, and the smooth layer (1) is a conductive material. The smooth layer (1) is suitable for conductive connection with an external power source. The electric field between adjacent smooth layers (1) satisfies the following condition: 5%E 击穿 <E 平均 <80%E 击穿 , of which E 平均 Ebreakdown is the average electric field strength between two adjacent smooth layers (1), and Ebreakdown is the breakdown electric field strength between two adjacent smooth layers (1) in the corresponding filtered fluid.

3. The electrically enhanced filter media according to claim 1, characterized in that, The smooth layer (1) has at least five parallel layers. The corrugated layer (2) is disposed between adjacent smooth layers (1). The corrugated layer (2) is a dielectric material. The smooth layer (1) on one side adjacent to the corrugated layer (2) is a conductive material or a dielectric material, and the smooth layer (1) on the other side is a dielectric material.

4. The electrically enhanced filter media according to claim 1 or 2, characterized in that, The smooth layer (1) has at least two parallel layers, and the corrugated layer (2) is disposed between adjacent smooth layers (1).

5. The electrically enhanced filter media according to any one of claims 1 to 3, characterized in that, Both the smooth layer (1) and the corrugated layer (2) are arranged in a spiral, serpentine or concentric circle.

6. The electrically enhanced filter media according to any one of claims 1 to 3, characterized in that, The closed end (3) of the corrugated layer (2) is made of dielectric material, and the closed end (3) of the corrugated layer (2) is made of filter material or insulating material.

7. The electrically enhanced filter media according to any one of claims 1 to 3, characterized in that, The angle between the line connecting the adjacent crests and troughs of the corrugated layer (2) and the smooth layer (1) is 30°~60°.

8. The electrically enhanced filter media according to any one of claims 1 to 3, characterized in that, The cross-sectional area of ​​the smooth layer (1) and the corrugated layer (2) perpendicular to the fluid entry direction accounts for less than 30% of the total cross-sectional area of ​​the flow channel.

9. The electrically enhanced filter media according to any one of claims 1 to 3, characterized in that, Along the flow direction of the fluid, the depth of the corrugated layer (2) is not less than 10 mm.

10. An electro-enhanced filtration device, characterized in that, The filter material having the electro-enhanced filter material according to any one of claims 1 to 9.

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