Filter element structure and electrostatic cleaning device with same

Abstract

This utility model relates to the field of air purification equipment technology, specifically to a filter element structure and an electrostatic purification device having the same. The filter element structure includes: a first high-voltage electrode plate and a second high-voltage electrode plate arranged opposite to each other; the first high-voltage electrode plate includes a plurality of first folded portions connected in sequence; the second high-voltage electrode plate includes a plurality of second folded portions connected in sequence; the first high-voltage electrode plate is adapted to be connected to the positive terminal of a high-voltage power supply; and the second high-voltage electrode plate is adapted to be connected to the ground terminal of the high-voltage power supply. A filter element is disposed in the receiving space formed by the first and second high-voltage electrode plates, and the filter element includes a plurality of third folded portions connected in sequence, the third folded portions corresponding to the first and second folded portions, and the first distance between the filter element and the first high-voltage electrode plate is greater than the second distance between the filter element and the second high-voltage electrode plate. This utility model solves the problems of existing filter element structures being prone to arcing and having poor polarization, thus affecting the filtration effect.

Description

Technical Field

[0001] This utility model relates to the field of air purification equipment technology, specifically to a filter element structure and an electrostatic purification device having the same. Background Technology

[0002] Electrostatic air purifiers utilize the principle of electrostatic adsorption to effectively capture fine particulate matter and harmful substances such as PM2.5, bacteria, and viruses. Because they do not use chemical agents, they avoid secondary pollution, making them suitable for environments with high air quality requirements and offering unique advantages in ventilation and purification. This is especially true for environments requiring long-term, continuous purification, which places higher demands on the lifespan and sustainable use of air purification equipment. However, as airborne dust and particulate matter pass through the filtration system, they accumulate on the filter cotton over time, reducing dust holding capacity and decreasing ventilation efficiency, necessitating regular filter replacement. Frequent replacements require equipment shutdown for maintenance, disrupting continuous production; furthermore, each filter replacement necessitates operators carrying the filter cotton and tools into the equipment for disassembly and replacement, leading to safety concerns, increased workload, and a poor working environment for operators.

[0003] To address this, existing technologies provide a solution for flexibly replacing filter media through a winding mechanism and an unwinding mechanism. However, this filter media is only applicable to ordinary air purification systems. If it is directly applied to electrostatic purification equipment, it will have problems such as easy sparking and poor polarization effect, which will affect the purification effect. Utility Model Content

[0004] In view of this, the present invention provides a filter element structure and an electrostatic purification device having the same, in order to solve the problems of existing filter element structures being prone to arcing and having poor polarization effect, which in turn affects the filtration effect.

[0005] In a first aspect, this utility model provides a filter element structure, comprising:

[0006] The first high-voltage electrode plate and the second high-voltage electrode plate are arranged opposite to each other, and are spaced apart to form a receiving space. The first high-voltage electrode plate includes a plurality of first folded parts connected in sequence, and the second high-voltage electrode plate includes a plurality of second folded parts connected in sequence. The first folded parts and the second folded parts are arranged in a one-to-one correspondence. The first high-voltage electrode plate is adapted to be connected to the positive terminal of the high-voltage power supply, and the second high-voltage electrode plate is adapted to be connected to the ground terminal of the high-voltage power supply.

[0007] The filter element is disposed in the receiving space formed by the first high-voltage electrode plate and the second high-voltage electrode plate. The filter element includes a plurality of third folded parts arranged in sequence. The third folded parts are correspondingly arranged with the first folded parts and the second folded parts. The first distance between the filter element and the first high-voltage electrode plate is greater than the second distance between the filter element and the second high-voltage electrode plate.

[0008] The filter element structure provided by this utility model, when connected to a high-voltage power supply, forms a charged region between the first and second high-voltage plates, providing electric field strength and charged particles. The filter element becomes polarized and charged. When airborne particles pass through, they acquire the corresponding charge and are adsorbed into the filter element, thus achieving the function of purification and dust removal. Setting the filter element in a folded shape effectively increases the contact area between the filter element and the air, improving the purification and dust removal effect. The first and second high-voltage plates are also folded, and the first distance between the filter element and the first high-voltage plate is greater than the second distance between the filter element and the second high-voltage plate. That is, the filter element is positioned as close as possible to the second high-voltage plate to conduct away the charge in time and prevent static electricity accumulation; while the filter element is positioned relatively far from the first high-voltage plate, effectively reducing the probability of arcing.

[0009] In one alternative implementation, the first distance is 0.5cm-2.0cm, and the second distance is 0.

[0010] When the distance between the filter element and the first high-voltage plate is too large, the polarization effect of the filter element is poor, which affects the purification and dust removal effect; when the distance between the filter element and the first high-voltage plate is too small, it is easy to spark, so the above-mentioned first distance is limited; the filter element and the second high-voltage plate are set in close contact, which can conduct away the charge at the fastest speed and avoid static electricity accumulation, which would lead to a decrease in filtration efficiency.

[0011] In one alternative embodiment, the fold angle of the third fold is 20°-60°.

[0012] The smaller the bend angle, the lower the air velocity flowing through the filter element under the same air volume, and the lower the filtration resistance. However, when the bend angle is too small, the filter element is prone to folding, that is, multiple folds overlap each other, resulting in increased resistance. At the same time, since the electric field is mainly distributed at the shortest distance between the two plates, that is, the effective polarization area is distributed outside the bend angle, the smaller the bend angle, the smaller the effective polarization area. Therefore, the above-mentioned bend angle range is limited.

[0013] In one alternative implementation, the first distance is 1.0 cm, and the fold angle of the third fold is 45°.

[0014] At this point, not only is the filtration resistance low, but the effective polarization area is also large, resulting in optimal filtration performance.

[0015] In one optional embodiment, the filter element is further provided with a pair of driving wheels and a plurality of driven wheels. The pair of driving wheels are located at both ends of the filter element folding direction, and the first end of the filter element is wound around one of the driving wheels, while the second end of the filter element is wound around the other driving wheel. The driven wheels are located at the folding corner of the third fold of the filter element.

[0016] A pair of drive wheels provide the driving force for filter replacement. The driven wheel rotates synchronously with the filter when the drive wheel rotates. The driven wheel mainly supports the folding angle of the third fold. The used filter is collected on one of the drive wheels, which makes filter replacement convenient.

[0017] In one alternative embodiment, the third fold of the filter element has an arc-shaped portion at the corner, and the arc of the arc-shaped portion is consistent with the outer circumferential arc of the driven wheel.

[0018] The above settings ensure the synchronous rotation of the driven wheel, guaranteeing smooth filter replacement.

[0019] Secondly, this utility model also provides an electrostatic purification device, including the above-mentioned filter element structure, and also including a housing, with the filter element structure disposed in the housing.

[0020] The electrostatic purification equipment provided by this invention reduces the probability of sparking while ensuring filtration effectiveness and thus guaranteeing safety.

[0021] In one optional embodiment, the filter element further includes a pair of driving wheels and a plurality of driven wheels. The housing includes a first housing, a second housing, and a third housing arranged sequentially along the folding direction of the filter element. The pair of driving wheels are respectively disposed in the first housing and the third housing. The first high-voltage electrode plate, the second high-voltage electrode plate, the filter element, and the plurality of driven wheels are disposed in the second housing. A first sealing structure and a second sealing structure are respectively provided at the connection between the first housing and the second housing, and at the connection between the second housing and the third housing. Both the first sealing structure and the second sealing structure are adapted to allow the filter element to pass through. The opening of the first sealing structure gradually decreases in size from the first housing to the second housing, and the opening of the second sealing structure gradually decreases in size from the second housing to the third housing.

[0022] The first sealing structure facilitates the entry of the filter element into the second housing, where it is compressed, effectively isolating the winding area of ​​the first housing from the filtration area of ​​the second housing and preventing contamination of the filter element in the winding area. The second sealing structure facilitates the entry of the filter element into the third housing, effectively isolating the filtration area of ​​the second housing from the dust accumulation area of ​​the third housing and preventing contaminated filter elements from re-entering the filtration area, thus ensuring filtration efficiency.

[0023] In one optional embodiment, the device further includes an electrical control box, an electrical control device connected thereto, and a high-voltage power supply. The electrical control box, the electrical control device, and the high-voltage power supply are all housed in a third housing, and the electrical control device is electrically connected to the electrical control box.

[0024] By unifying the power supply of the external power source, the electronic control device, and the drive motor of the drive wheel into the electronic control box, the volume of the circuit wiring is greatly reduced. The electronic control device can monitor the working status of the high-voltage power supply in real time. After the electrostatic purification equipment has been used for a period of time, the purification efficiency will decrease due to the dirt on the filter element. At the same time, the pressure difference between the air inlet and air outlet of the electrostatic purification equipment will increase. When the electronic control device detects that the pressure difference has reached the replacement threshold, the electronic control device will control the filter element to be replaced automatically.

[0025] In one alternative embodiment, at least two first high-voltage plates, a second high-voltage plate, and a filter element are connected in series inside the housing.

[0026] By connecting at least two first high-voltage plates, a second high-voltage plate, and a filter element in series, the area of ​​the filtration zone can be increased, meeting the needs of some scenarios with higher ventilation and purification air volume requirements. Attached Figure Description

[0027] 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.

[0028] Figure 1 This is a schematic diagram of a filter element structure according to an embodiment of the present utility model;

[0029] Figure 2 This is a schematic diagram of the first high-voltage electrode and the second high-voltage electrode;

[0030] Figure 3 This is a schematic diagram of an electrostatic purification device according to an embodiment of the present utility model;

[0031] Figure 4 for Figure 3 A magnified view of a portion of the image;

[0032] Figure 5 This is a schematic diagram of another filter element structure according to an embodiment of the present utility model.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. First high-voltage electrode plate; 101. First folding section

[0035] 2. Second high-voltage electrode plate; 201. Second folding section;

[0036] 3. Filter element; 301. Third fold;

[0037] 4. Drive wheel; 401. Drive motor; 402. First bearing;

[0038] 5. Driven wheel;

[0039] 6. Shell; 601. First shell; 602. Second shell; 603. Third shell. Detailed Implementation

[0040] 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.

[0041] The filter element structure includes a discharge section and a polarization section. The discharge section consists of an array of discharge needles and corresponding high-voltage plates. The discharge needles are connected to a high-voltage power supply, and the high-voltage plates are grounded. The discharge needles and their corresponding high-voltage plates form a charged region, and when particles pass through, they are charged with the corresponding charge. The high-voltage plates can be porous metal plates, metal mesh, etc. For example, a stainless steel perforated plate with a hole diameter of 5mm, uniformly and densely distributed, and a hole spacing of 1mm. The polarization section consists of two high-voltage plates and a filter element located in the middle, with the filter element configured as a V-shaped folded sawtooth shape.

[0042] The electrostatic purification equipment will be explained using an electrostatic air purifier as an example.

[0043] The following is combined with Figures 1 to 5 The following describes embodiments of the present invention.

[0044] According to an embodiment of this utility model, a filter element structure is provided, such as... Figure 1 and Figure 2 As shown, it includes:

[0045] The first high-voltage plate 1 and the second high-voltage plate 2 are arranged opposite to each other, with the first high-voltage plate 1 and the second high-voltage plate 2 spaced apart to form a receiving space. The first high-voltage plate 1 includes a plurality of first folded portions 101 connected in sequence, and the second high-voltage plate 2 includes a plurality of second folded portions 201 connected in sequence. The first folded portions 101 and the second folded portions 201 are arranged in a one-to-one correspondence. The first high-voltage plate 1 is adapted to be connected to the positive terminal of the high-voltage power supply, and the second high-voltage plate 2 is adapted to be connected to the ground terminal of the high-voltage power supply.

[0046] The filter element 3 is disposed in the accommodating space formed by the first high-voltage electrode plate 1 and the second high-voltage electrode plate 2. The filter element 3 includes a plurality of third folded portions 301 arranged in sequence. The third folded portions 301 are correspondingly arranged with the first folded portion 101 and the second folded portion 201. The first distance between the filter element 3 and the first high-voltage electrode plate 1 is greater than the second distance between the filter element 3 and the second high-voltage electrode plate 2.

[0047] The first high-voltage electrode 1, the second high-voltage electrode 2, and the filter element 3 are all set in a V-shaped folded sawtooth shape, i.e., a wave shape. The folding angles of the three are basically the same, and the peaks and troughs are set accordingly to ensure that the filter element can be set as close as possible to the first high-voltage electrode 1 and the second high-voltage electrode 2. Of course, a certain gap is reserved between the filter element 3 and the first high-voltage electrode 1.

[0048] The filter element structure provided by this utility model, when connected to a high-voltage power supply, forms a charged region between the first high-voltage plate 1 and the second high-voltage plate 2, providing electric field strength and charged particles. The filter element 3 is polarized and charged. When airborne particles pass through, they are charged with the corresponding charge and adsorbed into the filter element 3, thus playing a role in purification and dust removal. Setting the filter element 3 in a folded shape can effectively reduce wind speed and pressure drop, increase the contact area between the filter element 3 and the air, improve the purification and dust removal effect, and charge the filter element 3, improving filtration efficiency. It also possesses electric field sterilization properties. The first high-voltage plate 1 and the second high-voltage plate 2 are also set in a folded shape, and the first distance between the filter element 3 and the first high-voltage plate 1 is greater than the second distance between the filter element 3 and the second high-voltage plate 2. That is, the filter element 3 and the second high-voltage plate 2 are placed as close as possible to conduct away the charge in time and prevent static electricity accumulation; while the filter element 3 is placed relatively far away from the first high-voltage plate 1, effectively reducing the probability of arcing.

[0049] In one embodiment, the first distance is 0.5cm-2.0cm, and the second distance is 0.

[0050] When the distance between filter element 3 and the first high-voltage electrode plate 1 is too large, the polarization effect of filter element 3 is poor, which affects the purification and dust removal effect; when the distance between filter element 3 and the first high-voltage electrode plate 1 is too small, it is easy to spark, so the above-mentioned first distance is limited; filter element 3 and the second high-voltage electrode plate 2 are set in close contact, which can conduct away the charge at the fastest speed and ensure safety.

[0051] In one embodiment, the fold angle of the third fold is 20°-60°.

[0052] When the angle of the third fold is too large, it is equivalent to the filter element 3 being laid flat, which will result in greater filtration resistance. The smaller the angle, the lower the air velocity flowing through the filter element 3 under the same air volume, and the lower the filtration resistance. Therefore, an angle of less than 60° is preferred. However, when the angle is too small, the filter element 3 is prone to folding, that is, multiple folds overlap each other, resulting in increased resistance. At the same time, since the electric field is mainly distributed at the shortest distance between the two plates, that is, the effective polarization area is distributed outside the angle, the smaller the angle, the smaller the effective polarization area. Therefore, the above-mentioned angle range is limited. The effective polarization area is the ratio of the electric field area at the shortest distance to the total electric field area.

[0053] In one embodiment, the first distance is 1.0 cm, and the fold angle of the third fold is 45°.

[0054] At this point, not only is the filtration resistance low, but the effective polarization area is also large, resulting in optimal filtration performance. Of course, the first distance and the angle of the third fold can also be other combinations within the range mentioned above. For example, if the first distance is 0.5cm and the angle of the third fold 301 is 20°, the filtration resistance is low, and the spacing is short, minimizing the problem of a small effective polarization area caused by a small angle. When the first distance is 2.0cm and the angle of the third fold 301 is 60°, although the filtration resistance is higher compared to other angles, the effective polarization area is larger.

[0055] In one embodiment, the filter element 3 is further provided with a pair of driving wheels 4 and a plurality of driven wheels 5. The pair of driving wheels 4 are respectively located at both ends of the filter element 3 in the folding direction, and the first end of the filter element 3 is wrapped around one of the driving wheels 4, while the second end of the filter element 3 is wrapped around the other driving wheel 4. The driven wheels 5 are located at the folding corner of the third folding portion 301 of the filter element 3.

[0056] The driving wheel 4 includes a drive motor 401 and a first bearing 402 mounted on the drive motor 401. The first bearing 402 is mounted on the output shaft of the drive motor 401 via a connector, and its axial direction is perpendicular to the airflow direction. The driven wheel 5 is a second bearing, also with its axial direction perpendicular to the airflow direction, and is located at the crests and troughs of the folds in the filter element 3. The two driving wheels 4 rotate in the same direction. One driving wheel 4 is used to release a new filter element, and the other driving wheel 4 is used to wind up the used filter element 3. When a new filter element is used up, another set of filter elements 3 and driven wheels 5 need to be replaced. One end of the newly replaced filter element 3 can be connected to the other end of the old filter element using a binding machine or tape, ensuring the connection strength so that the connection will not break during the winding process. When there are too many filter elements 3 on the drive wheel 4 used to collect old filter elements, the first bearing 402 is removed, a section of the old filter element is left, the rest is cut off, and a new first bearing 402 is replaced. The section of old filter element that was left is manually wrapped and fixed on the new first bearing 402, thereby realizing the replacement of filter element 3.

[0057] A pair of drive wheels 4 provide the driving force for replacing the filter element 3. The driven wheel 5 rotates synchronously with the filter element 3 when the drive wheels 4 rotate. The driven wheel 5 mainly supports the folding angle of the third fold 301. The used filter element 3 is collected on one of the drive wheels 4, which realizes convenient replacement of the filter element 3, reduces manual intervention, and eliminates the need for users to frequently check and replace the filter element 3, thus improving the convenience of use. Moreover, due to the timely replacement of the filter element 3, the best filtration effect is always maintained. At the same time, the overall cost of use is reduced by reducing the frequency of filter element 3 replacement and labor costs.

[0058] In one embodiment, the third fold 301 of the filter element 3 has an arc-shaped portion at its corner, and the arc of the arc-shaped portion is consistent with the outer circumferential arc of the driven wheel 5.

[0059] The arc-shaped portion of filter element 3 is designed so that it is not fully folded during folding, but rather formed by wrapping it around the outer circumference of driven wheel 5. This design ensures the synchronous rotation of driven wheel 5, guaranteeing smooth replacement of filter element 3. The first fold portion 101 of the first high-voltage electrode plate 1 and the second fold portion 201 of the second high-voltage electrode plate 2 can be folded normally.

[0060] According to an embodiment of the present invention, in another aspect, the present invention also provides an electrostatic purification device, including the above-mentioned filter element structure, and further including a housing 6, wherein the filter element structure is disposed in the housing 6.

[0061] like Figure 3 and Figure 4 As shown, the electrostatic purification device in this embodiment is an electrostatic air purifier, having an air inlet side and an air outlet side arranged opposite to each other. The first high-voltage electrode plate 1 is located on the air inlet side, and the second high-voltage electrode plate 2 is located on the air outlet side. That is, along the airflow direction, the first high-voltage electrode plate 1, the filter element 3, and the second high-voltage electrode plate 2 are arranged sequentially. The electrostatic purification device provided by this utility model reduces the probability of arcing while ensuring the filtration effect, thus ensuring safety.

[0062] In an optional embodiment, it further includes a pair of driving wheels 4 and a plurality of driven wheels 5. The housing 6 includes a first housing 601, a second housing 602 and a third housing 603 arranged sequentially along the folding direction of the filter element 3. The pair of driving wheels 4 are respectively disposed in the first housing 601 and the third housing 603. The first high-voltage electrode 1, the second high-voltage electrode 2, the filter element 3 and the plurality of driven wheels 5 are disposed in the second housing 602. A first sealing structure and a second sealing structure are respectively provided at the connection between the first housing 601 and the second housing 602 and at the connection between the second housing 602 and the third housing 603. Both the first sealing structure and the second sealing structure are suitable for the filter element 3 to pass through. The opening of the first sealing structure is a gradually decreasing flared shape from the first housing 601 to the second housing 602. The opening of the second sealing structure is a gradually decreasing flared shape from the second housing 602 to the third housing 603.

[0063] The interiors of the first housing 601, the second housing 602, and the third housing 603 are, in sequence, a winding area, a filtration area, and a dust accumulation area. Partitions are provided at the connections between the first housing 601 and the second housing 602, and between the second housing 602 and the third housing 603. These partitions are equipped with a first sealing structure and a second sealing structure. Both the first and second sealing structures are elongated, funnel-shaped, and made of elastic rubber, such as rubber strips. While ensuring a tight seal with the housing 6, they effectively compress the filter element 3, further guaranteeing the sealing effect.

[0064] The first sealing structure facilitates the entry of the filter element 3 into the second housing 602, where it is compressed, effectively isolating the winding area of ​​the first housing 601 from the filtration area of ​​the second housing 602 and preventing contamination of the filter element 3 in the winding area. The second sealing structure compresses the filter element 3 before it enters the third housing 603, effectively isolating the filtration area of ​​the second housing 602 from the dust accumulation area of ​​the third housing 603 and preventing contaminated filter element 3 from re-entering the filtration area, thus ensuring filtration efficiency.

[0065] In one embodiment, the device further includes an electrical control box, an electrical control device connected thereto, and a high-voltage power supply. The electrical control box, the electrical control device, and the high-voltage power supply are all housed in the third housing 603, and the electrical control device is electrically connected to the electrical control box.

[0066] The electrical control box is located at the end of the third housing 603, facilitating electrical connection with the electrical control device and the drive motor 401 of the drive wheel 4. By uniformly connecting the external power supply, the electrical control device, and the drive motor 401 of the drive wheel 4 to the electrical control box, the volume of circuit wiring is greatly reduced. The electrical control device can monitor the working status of the high-voltage power supply in real time. After the electrostatic purification equipment has been used for a period of time, the purification efficiency decreases due to the dirt on the filter element 3, which is manifested as an increase in the pressure difference between the air inlet and outlet sides of the electrostatic purification equipment. When the electrical control device detects that the pressure difference reaches the replacement threshold, it indicates that the dust holding capacity is too high and the replacement time has arrived. The electrical control device controls the filter element to be replaced automatically. Specifically, a pressure difference detection device can be used to detect the pressure difference between the air inlet and outlet sides. The drive motor can also be operated to start and stop in real time as needed to realize the winding and replacement of the filter element 3.

[0067] In one embodiment, at least two first high-voltage plates 1, a second high-voltage plate 2, and a filter element 3 are connected in series inside the housing.

[0068] like Figure 5 As shown, at least two first high-voltage plates 1, second high-voltage plates 2 and filter elements 3 are connected in series along the folding direction and share two drive wheels 4, which reduces costs. Connecting at least two first high-voltage plates 1, second high-voltage plates 2 and filter elements 3 in series can increase the area of ​​the filtration zone and meet the needs of some scenarios with higher ventilation and purification air volume.

[0069] 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. A filter element structure, characterized in that, include: A first high-voltage electrode plate (1) and a second high-voltage electrode plate (2) are arranged opposite to each other, with the first high-voltage electrode plate (1) and the second high-voltage electrode plate (2) spaced apart to form a receiving space. The first high-voltage electrode plate (1) includes a plurality of first folded portions (101) arranged in sequence, and the second high-voltage electrode plate (2) includes a plurality of second folded portions (201) arranged in sequence. The first folded portions (101) and the second folded portions (201) are arranged in a one-to-one correspondence. The first high-voltage electrode plate (1) is adapted to be connected to the positive terminal of the high-voltage power supply, and the second high-voltage electrode plate (2) is adapted to be connected to the ground terminal of the high-voltage power supply. The filter element (3) is disposed in the accommodating space formed by the first high-voltage electrode plate (1) and the second high-voltage electrode plate (2). The filter element (3) includes a plurality of third folded portions (301) arranged in sequence. The third folded portions (301) are correspondingly arranged with the first folded portion (101) and the second folded portion (201). The first distance between the filter element (3) and the first high-voltage electrode plate (1) is greater than the second distance between the filter element (3) and the second high-voltage electrode plate (2).

2. The filter element structure according to claim 1, characterized in that, The first distance is 0.5cm-2.0cm, and the second distance is 0.

3. The filter element structure according to claim 2, characterized in that, The fold angle of the third fold (301) is 20°-60°.

4. The filter element structure according to claim 3, characterized in that, The first distance is 1.0 cm, and the folding angle of the third fold (301) is 45°.

5. The filter element structure according to any one of claims 1-4, characterized in that, It also includes a pair of driving wheels (4) and a plurality of driven wheels (5). The pair of driving wheels (4) are respectively located at both ends of the folding direction of the filter element (3), and the first end of the filter element (3) is wrapped around one of the driving wheels (4), and the second end of the filter element (3) is wrapped around the other driving wheel (4). The driven wheels (5) are located at the corner of the third fold (301) of the filter element (3).

6. The filter element structure according to claim 5, characterized in that, The filter element (3) has an arc-shaped part at the corner of the third fold (301), and the arc of the arc part is consistent with the outer circumferential arc of the driven wheel (5).

7. An electrostatic purification device, characterized in that, The filter element structure includes any one of claims 1-6, and further includes a housing (6), wherein the filter element structure is disposed in the housing (6).

8. The electrostatic purification equipment according to claim 7, characterized in that, It also includes a pair of driving wheels (4) and a plurality of driven wheels (5). The housing (6) includes a first housing (601), a second housing (602) and a third housing (603) arranged sequentially along the folding direction of the filter element (3). The pair of driving wheels (4) are respectively disposed in the first housing (601) and the third housing (603). The first high-voltage plate (1), the second high-voltage plate (2), the filter element (3) and the plurality of driven wheels (5) are disposed in the second housing (602). A first sealing structure and a second sealing structure are respectively provided at the connection between the first housing (601) and the second housing (602) and at the connection between the second housing (602) and the third housing (603). Both the first sealing structure and the second sealing structure are suitable for the filter element (3) to pass through. The opening of the first sealing structure is a gradually decreasing flared shape from the first housing (601) to the second housing (602). The opening of the second sealing structure is a gradually decreasing flared shape from the second housing (602) to the third housing (603).

9. The electrostatic purification equipment according to claim 8, characterized in that, It also includes an electrical control box, an electrical control device connected thereto, and a high-voltage power supply. The electrical control box, the electrical control device, and the high-voltage power supply are all located in the third housing (603), and the electrical control device is electrically connected to the electrical control box.

10. The electrostatic purification equipment according to any one of claims 7-9, characterized in that, At least two first high-voltage plates (1), second high-voltage plates (2) and filter elements (3) are connected in series inside the housing (6).

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