Dust-collecting sheet and purification apparatus

Abstract

A dust-collecting sheet, comprising a body (100), wherein the body (100) comprises a rigid insulating layer (101) and conductive layers (102), wherein the conductive layers (102) are located on an upper surface and lower surface of the rigid insulating layer (101); and the body (100) is provided with several fixed mounting positions (105) on edges thereof along the length direction thereof. Further provided is a purification apparatus, comprising a frame (300), wherein the frame (300) is internally provided with several grounding dust-collecting sheets and high-pressure dust-collecting sheets, which are alternately stacked, and the grounding dust-collecting sheets and the high-pressure dust-collecting sheets are each connected to fixed isolation members. Thus, the technical problems of short service life caused by using a metal electrode plate, the purification efficiency being affected due to point discharge, a large weight and high cost can be solved.

Description

Dust collecting sheet and purification device Technical Field

[0001] The present invention belongs to the technical field of air purification, and in particular relates to a dust collecting piece and a purification device. Background Art

[0002] Currently, the mainstream technologies for air purification are categorized as filtration and electrostatic. Filtration purifies the air by filtering or adsorbing pollutants in the air through fibers and fiber-based filter materials. The technology is mature and its operation is relatively stable. However, labor costs, material costs, operating costs, and maintenance costs are very high, and improper maintenance can pose certain safety risks. Because the filter material continuously intercepts pollutants in the air, the gaps between the fibers are constantly clogged, and wind resistance continues to increase. Therefore, the filter material needs to be frequently cleaned and replaced. At the same time, bacteria and viruses in the air are trapped in the filter material, causing bacterial growth, mold, and odor. Electrostatic technology charges particles in the gas through the ionization module. The charged particles are then adsorbed by the electric field formed by the dust collection module, completing the purification process.

[0003] Various high-voltage electrostatic precipitators, developed and designed using the technical principles of electrostatic technology, can purify a wide range of flow rates and a wide range of particulate matter, and can achieve relatively stable operation in environments with varying temperatures and humidity. They are well-suited for air filtration in household, commercial, industrial, tunnel, and subway applications, and feature long service life, high purification efficiency, low operating costs, and low maintenance costs. Currently, most high-voltage electrostatic precipitators use metal plates, which have the following disadvantages: 1. They are easily corroded, shortening their service life; 2. The edges of the metal plates are prone to burrs, resulting in sharp discharges, which in turn affect purification efficiency; and 3. The metal plates are heavy, resulting in high material and transportation costs. Summary of the Invention

[0004] In view of the various shortcomings of the existing technology, a dust collecting sheet and purification device are proposed to solve the technical problems of the existing technology such as the use of metal plates resulting in short service life, impact on purification efficiency due to tip discharge, large weight, high material cost and high transportation cost.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] In a first aspect, the present invention provides a dust collecting sheet, comprising a main body, the main body comprising a rigid insulating layer and a conductive layer, the conductive layer being located on the upper and lower surfaces of the rigid insulating layer, and the edge of the main body being provided with a plurality of fixed mounting positions along its length direction.

[0007] The technical solution is further configured such that the fixed installation positions are configured as slot-shaped openings and / or semicircular openings, and adjacent fixed installation positions have different opening depths.

[0008] The present technical solution is further configured such that a plurality of avoidance ports are provided on the edge of the main body along its length direction, the fixed installation position and the avoidance ports are spaced apart, the opening depths of the avoidance ports and the fixed installation position are different, and the avoidance ports and the fixed installation position are both configured as slot-shaped openings and / or semicircular openings.

[0009] The technical solution is further configured such that a groove extending along the length direction of the body is provided inside the fixed installation position.

[0010] The technical solution is further configured such that one end portion of the body serves as a power connection end, and the power connection end is provided with a closed-end power connection port.

[0011] The technical solution is further configured such that the length of the conductive layer is less than or equal to the length of the rigid insulating layer, and the conductive layer extends to the power connection end.

[0012] The technical solution is further configured such that the area of ​​the end portion of the conductive layer located at the power connection end is smaller than the area of ​​the other end portion of the conductive layer.

[0013] The technical solution is further configured such that a process circular hole is provided at the end of the body, and the minimum distance between the process circular hole and the end of the body is 0-4 mm.

[0014] The technical solution is further configured such that the distances between the edge of the conductive layer and the edge of the body are equal.

[0015] The present technical solution is further configured such that the conductive layer is made of conductive material and additives, the conductive material includes graphite, graphene or conductive ink, the additive includes silicone, and the rigid insulating layer is made of one or more of polycarbonate, polypropylene, ABS plastic, polyamide, polyformaldehyde, polytetrafluoroethylene, polycarbonate, glass fiber reinforced plastic, and phenolic plastic.

[0016] The technical solution is further configured such that the thickness of the rigid insulating layer is 0.1-2 mm, and the thickness of the conductive layer is 0.005-0.2 mm.

[0017] In a second aspect, the present invention provides a purification device comprising a frame, wherein a plurality of grounded dust collecting sheets and high-pressure dust collecting sheets alternately stacked are provided inside the frame, and both the grounded dust collecting sheets and the high-pressure dust collecting sheets adopt the dust collecting sheets described above.

[0018] The technical solution is further configured such that the grounded dust collecting sheet and the high-voltage dust collecting sheet are respectively connected to fixed isolating members, and the fixed isolating members are insulating glue and / or rigid insulating members.

[0019] The technical solution is further configured such that the grounded dust collecting sheet and the high-voltage dust collecting sheet are staggered 180°, and an insulator is provided between the frame and the end of the grounded electrode sheet and between the frame and the end of the high-voltage electrode sheet.

[0020] The technical solution is further configured to further include a high-voltage power supply, which is located on the inner side or the outer side of the frame.

[0021] The technical solution is further configured such that a plurality of alternately stacked grounded dust collecting sheets and high-voltage dust collecting sheets form a purification unit, a plurality of purification units are provided in the frame, and insulating plates are provided between adjacent purification units.

[0022] The beneficial effects of the present invention are:

[0023] By setting a rigid insulating layer, the thickness of the dust collecting sheet can be minimized while ensuring the strength and stability of the dust collecting sheet. It is light in weight, and has low material and transportation costs. Compared with metal plates, it is corrosion-resistant, which helps to extend the service life. It has no burrs and avoids the impact of tip discharge on purification efficiency. The dust collecting sheet with this structure has a larger effective ventilation area per unit area, a larger dust collecting area and dust holding capacity, higher efficiency, and a longer maintenance cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a top view of a dust collecting sheet according to an embodiment of the present invention;

[0025] FIG2 is a side view of a dust collecting sheet according to an embodiment of the present invention;

[0026] FIG3 is a top view of another embodiment of the dust collecting sheet in an embodiment of the present invention;

[0027] FIG4 is a top view of another embodiment of the dust collecting sheet according to the present invention;

[0028] FIG5 is a top view of another embodiment of the dust collecting sheet according to the present invention;

[0029] FIG6 is a top view of another embodiment of the dust collecting sheet according to the present invention;

[0030] FIG7 is a top view of another embodiment of the dust collecting sheet according to the present invention;

[0031] FIG8 is a top view of another embodiment of the dust collecting sheet according to the present invention;

[0032] FIG9 is a top view of another embodiment of the dust collecting sheet according to the present invention;

[0033] Figure 10 is a top view of another embodiment of the dust collecting sheet in an embodiment of the present invention;

[0034] Figure 11 is a top view of another embodiment of the dust collecting sheet in an embodiment of the present invention;

[0035] FIG12 is a schematic diagram of a purification device according to an embodiment of the present invention;

[0036] FIG13 is an exploded view of a purification device according to an embodiment of the present invention;

[0037] FIG14 is a partial schematic diagram of point A in FIG13 .

[0038] In the drawings: 100, body; 200, fixed spacer; 300, frame; 400, conductor; 500, insulator; 600, wire; 700, dust collecting sheet; 800, gap;

[0039] 101. Rigid insulation layer; 102. Conductive layer; 103. Process round hole; 104. Insulation gap; 105. Fixed installation position; 106. Avoidance port; 107. Power connection port; 108. First electrical safety area; 109. Second electrical safety area; 110. Groove. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application. In addition, the directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only reference to the directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the invention.

[0041] According to an embodiment of the present invention, a dust collecting sheet is provided, please refer to Figures 1 and 2, including a main body 100, the main body 100 including a rigid insulating layer 101 and a conductive layer 102, the conductive layer 102 is located on the upper surface and the lower surface of the rigid insulating layer 101, and the edge of the main body 100 is provided with several fixed installation positions 105 along its length direction.

[0042] It should be noted that by setting a rigid insulating layer 101, the thickness of the dust collecting sheet can be minimized while ensuring the strength and stability of the dust collecting sheet. It is light in weight, and has low material and transportation costs. Compared with metal plates, it is corrosion-resistant, helps to extend its service life, has no burrs, and avoids affecting the purification efficiency due to tip discharge. The dust collecting sheet with this structure has a larger effective ventilation area per unit area, a larger dust collecting area and dust holding capacity, higher efficiency, and a longer maintenance cycle.

[0043] Specifically, the conductive layer 102 is configured as a strip, which can be configured as one strip or multiple strips.

[0044] In the dust collecting piece of this embodiment, please refer to FIG. 1 , the fixed installation position 105 is configured as a slot-shaped opening and / or a semicircular opening, and adjacent fixed installation positions 105 have different opening depths.

[0045] The fixed installation position with a small depth is used to connect the fixed isolation piece, which is an insulating glue and / or a rigid insulating piece, and the fixed installation position with a large depth is used as an avoidance port.

[0046] In the dust collecting sheet of this embodiment, please refer to Figure 3. The edge of the main body 100 is also provided with a plurality of avoidance ports 106 along its length direction. The fixed installation position 105 and the avoidance ports 106 are spaced apart. The opening depths of the avoidance ports 106 and the fixed installation position 105 are different, and the avoidance ports 106 and the fixed installation position 105 are both set as slot-shaped openings and / or semicircular openings.

[0047] Specifically, referring to Figure 3 , the fixed mounting position 105 is configured as a shallow arc, and the escape port 106 is configured as a slot. Referring to Figure 7 , the fixed mounting position 105 is configured as a shallow arc, and the escape port 106 is configured as a semicircular opening. Alternatively, both the fixed mounting position 105 and the escape port 106 can be configured as slots. Referring to Figure 8 , both the fixed mounting position 105 and the escape port 106 are configured as slots, and the bottom surface of the fixed mounting position 105 is further configured with a semicircular, deeper opening.

[0048] In the dust collecting sheet of this embodiment, referring to FIG. 1 and FIG. 9 , a groove 110 extending along the length direction of the body 100 is provided inside the fixed installation position 105 .

[0049] It should be noted that the groove 110 increases the contact area between the fixed installation position 105 and the colloid, which can realize vertical gluing of the purification and dust removal module. The vertical gluing can be carried out on two surfaces at the same time, and the production speed is faster. The design of the groove 110 allows more colloid to be immersed in the groove 110 when vertically gluing, and a combination of the colloid and the dust collecting sheet can be formed in the groove 110, resulting in a larger contact area and better firmness.

[0050] In the dust collecting sheet of this embodiment, please refer to FIG. 1 , one end of the main body 100 serves as a power connection end, and the power connection end is provided with a closed power connection port 107 .

[0051] It should be noted that the power connection is achieved by inserting a metal wire / rod into the power connection port 107 , and the closed-end power connection port 107 exerts an inward force on the metal wire / rod, so that the metal wire / rod has a higher fit with the conductive layer 102 .

[0052] Referring to Figure 1 , the closed-end power connection port 107 includes an open end and a closed end, with a protruding end disposed between the open and closed ends. The metal wire / rod enters the power connection port 107 from the open end. The cross-section of the closed-end power connection port 107 is an isosceles trapezoid, with the upper base of the isosceles trapezoid serving as the open end, the lower base of the isosceles trapezoid serving as the closed end, and the waist of the isosceles trapezoid serving as the protruding end. The protruding end exerts an inward force on the metal wire / rod, achieving a snap connection between the power connection port 107 and the metal wire / rod.

[0053] Preferably, the angle between the protruding end and the horizontal direction is 10-25°. When the angle is less than 10°, the power connection port 107 and the metal wire / rod are easier to engage, but the secureness after engagement is poor. When the angle is greater than 25°, the power connection port 107 and the metal wire / rod are more difficult to engage, but the secureness after engagement is good. When the angle is 15°, the power connection port 107 and the metal wire / rod are easier to engage, and the secureness after engagement is good.

[0054] At the same time, an arc matching the metal wire / rod can be provided at the protruding end, so that after the metal wire / rod is inserted into the power connection port 107 , part of the metal wire / rod falls into the arc, making the connection tighter.

[0055] In addition, the cross-section of the closed-end power connection port 107 can also be set to an arc shape. The contact area between the arc shape and the metal wire / rod is increased, and the power connection stability is better. Preferably, the arc shape is a superior arc. The diameter of the metal wire / rod matches the arc shape, and the gap is 0.2-1mm. When the gap is less than 0.2mm, the gap between the metal wire / rod and the arc shape is too small, and it is not easy to snap together, and the production and processing technology requirements are too high. When the gap is greater than 1mm, the gap between the metal wire / rod and the arc shape is too large, and it will become loose after snapping together, and the power connection stability is poor.

[0056] In the dust collecting sheet of this embodiment, referring to FIG. 1 , the length of the conductive layer 102 is less than or equal to the length of the rigid insulating layer 101 , and the conductive layer 102 extends to the power connection end.

[0057] In this embodiment of the dust collecting sheet, the area of ​​the conductive layer 102 at the power connection end is smaller than the area of ​​the other end of the conductive layer 102 to enhance electrical safety. During assembly, several dust collecting sheets are docked within the frame to form a purification device. Furthermore, an insulator is provided between the end of the body 100 and the frame for insulation. This reduces the area of ​​the conductive layer 102 at the power connection end, preventing the end of the conductive layer 102 from being too close to the frame for electrical safety, which could affect stable operation later.

[0058] Please refer to Figure 5. The end of the conductive layer 102 located at the power connection end is inclined from the entrance of the power connection port 107 toward the direction away from the power connection end. A first electrical safety area 108 is present between the power connection end and the conductive layer 102. Two first electrical safety areas 108 are symmetrically provided, and the first electrical safety areas 108 are triangular. The symmetrical structural design can maintain the uniformity of the electrical safety distance.

[0059] Referring to Figure 6 , conductive layer 102 has a notch at the end of the power connection, forming a second electrical safety zone 109. Two second electrical safety zones 109 are symmetrically arranged, each in a square shape. This symmetrical design maintains a uniform electrical safety distance. Specifically, conductive layer 102 extends to the area between the notch and power connection port 107.

[0060] In the dust collecting sheet of this embodiment, please refer to Figure 1. A process circular hole 103 is provided at the end of the main body 100. The process circular hole 103 is far away from the end of the main body 100. After assembly, the process circular hole 103 is exposed. At this time, an insulating gap 104 is provided between the process circular hole 103 and the conductive layer 102 to form a safe distance.

[0061] In the dust collecting sheet of this embodiment, please refer to Figure 4. The minimum distance between the process circular hole 103 and the end of the main body 100 is 0-4mm. The process circular hole 103 is moved toward the end of the main body 100. During assembly, several dust collecting sheets are docked inside the frame to form a purification device. At this time, the process circular hole 103 also serves as the power connection port 107, solving the purification blind spot generated near the process circular hole 103.

[0062] In the dust collecting sheet of this embodiment, referring to FIG. 10 and FIG. 11 , the distance between the edge of the conductive layer 102 and the edge of the body 100 is equal.

[0063] It should be noted that the edge shape of the conductive layer 102 is designed based on the shape of the fixed installation position 105 and the avoidance port 106, so as to make full use of the effective area of ​​the main body 100 and maximize the proportion of the conductive layer 102 without affecting electrical safety. This helps to increase the area of ​​the purification device (or electrode plate) for capturing particulate matter, increase the action time on particulate matter, improve the purification efficiency of particulate matter, and correspondingly increase the dust holding capacity of the purification device.

[0064] Referring to Figure 11 , both the fixed mounting position 105 and the avoidance port 106 are semicircular, resulting in a wave-like edge to the conductive layer 102. Referring to Figure 10 , the avoidance port 106 is a slot-shaped opening, with the fixed mounting position 105 located between adjacent avoidance ports 106. Therefore, the edge of the conductive layer 102 resembles a rectangular tooth shape.

[0065] In order to verify whether conductive layers of different shapes affect the purification efficiency of the purification device, the inventors conducted the following experiment to compare purification devices with a length of 500 mm, a width of 400 mm, and a thickness of 50 mm. When the front end had the same ionization device and ionization voltage, and under the same environment, the PM2.5 purification efficiency of the purification device was compared at two wind speeds. The experimental data are shown in Table 1.

[0066] Table 1:

[0067] Table 1 shows that the wavy conductive layer 102 (see Figure 11) has the largest proportion, achieving the highest PM2.5 purification efficiency at both wind speeds. The square conductive layer 102 (see Figure 10) has the second-highest proportion, also showing relatively high PM2.5 purification efficiency. At high wind speeds of 3 m / s, the standard conductive layer 102 (see Figure 7) has the smallest proportion, and the efficiency gap between it and the wavy and square conductive layers is the largest and most significant. Therefore, increasing the proportion of conductive layer 102 is beneficial for ensuring the PM2.5 purification efficiency of the purification device, and this increased efficiency also increases the dust holding capacity of the purification device.

[0068] In the dust collecting sheet of this embodiment, referring to FIG. 1 and FIG. 2 , the conductive layer 102 is made of a conductive material and an additive. The conductive material includes graphite, graphene or conductive ink, and the additive includes silicone.

[0069] The rigid insulating layer 101 is made of one or more of polycarbonate, polypropylene, ABS plastic, polyamide, polyoxymethylene, polytetrafluoroethylene, polycarbonate, glass fiber reinforced plastic, and phenolic plastic. Preferably, the rigid insulating layer 101 is made of glass fiber reinforced plastic (FRP). FRP is a new functional material made by a composite process of synthetic resin and glass fiber. Its relative density is between 1.5 and 2.0, which is only 1 / 4 to 1 / 5 of that of carbon steel, but its tensile strength is close to or even exceeds that of carbon steel, and its strength is comparable to that of high-grade alloy steel. Its high strength can minimize the thickness of the dust collecting sheet. The dust collecting sheet made of this structure has a larger effective ventilation area per unit area of ​​the purification device, a larger dust collecting area and dust holding capacity, higher efficiency, and a longer maintenance cycle.

[0070] In the dust collecting sheet of this embodiment, referring to Figures 1 and 2, the thickness of the rigid insulating layer 101 is 0.1-2mm, and the thickness of the conductive layer 102 is 0.005-0.2mm. If the rigid insulating layer 101 is too thin, such as less than 0.1mm, the supporting strength is insufficient and the dust collecting sheet is easily deformed. If the rigid insulating layer 101 is too thick, such as greater than 2mm, the dust collecting sheet is thicker, the effective ventilation area per unit area of ​​the corresponding purification device is reduced, and the purification efficiency and dust holding capacity are significantly reduced. A range of 0.1-2mm can achieve a good balance between support, thickness, and maintaining purification efficiency and dust holding capacity. If the conductive layer 102 is too thin, such as less than 0.005mm, the production and processing is difficult, and the layer thickness is difficult to control. If the conductive layer 102 is too thick, such as greater than 0.2mm, the processing is difficult, the adhesion is insufficient, and there is a risk of the outer conductive layer falling off. A range of 0.005-0.2mm can achieve a good balance between processing difficulty and stability.

[0071] In order to verify whether different rigid insulation layer thicknesses affect the purification efficiency of the purification device, the inventors conducted the following experiment to compare purification devices with a length of 500 mm, a width of 300 mm, and a thickness of 45 mm. Under the same conditions of the front-end ionization device and ionization voltage, and under the same environment, the effects of different rigid insulation layer thicknesses on PM2.5 purification efficiency were compared. The experimental data are shown in Table 2.

[0072] Table 2:

[0073] It can be concluded from Table 2 that: when the thickness of the rigid insulation layer is less than 0.1mm, the supporting strength is insufficient, the dust collecting sheet is easily deformed, and the PM2.5 purification efficiency is very low; when the thickness of the rigid insulation layer is greater than 2mm, the dust collecting sheet is thicker, the effective ventilation area per unit area of ​​the corresponding purification device becomes smaller, and the purification efficiency is significantly reduced; 0.1-2mm is a good range that can take into account the supporting strength, thickness, purification efficiency and dust holding capacity.

[0074] According to an embodiment of the present invention, a purification device is provided, please refer to Figure 12, which includes a frame 300, and a plurality of grounded dust collecting sheets and high-voltage dust collecting sheets that are alternately stacked are provided inside the frame 300. The grounded dust collecting sheets and the high-voltage dust collecting sheets both use the dust collecting sheets 700.

[0075] In the purification device of this embodiment, please refer to FIG. 12 , the grounded dust collecting sheet and the high-voltage dust collecting sheet are respectively connected to a fixed isolation member 200 , and the fixed isolation member 200 is an insulating glue and / or a rigid insulating member.

[0076] Specifically, insulating adhesive has high bonding strength and can withstand high and low temperature impacts, such as PUR adhesive on the market; hot melt adhesive can also be used for fixing. The application field of purification devices fixed with hot melt adhesive is limited. It cannot be used in environments with large temperature differences throughout the year or large temperature differences between morning and evening. Hot melt adhesive easily becomes soft when exposed to high temperatures and cracks when exposed to low temperatures.

[0077] Among them, after the shallow arc opening is injected with insulating glue and fixed, an approximately circular colloid is formed, and the circular colloid forms an equidistant safety distance with the avoidance port 106. At the same time, the size of the shallow arc opening is adapted to the amount of glue, and the colloid is flush with the edge of the dust collecting sheet, or slightly lower than the edge of the dust collecting sheet, that is, part of the colloid is in the shallow arc opening, and part is combined with the dust collecting sheet to form an approximately circular colloid, maintaining surface flatness and aesthetics. Alternatively, the fixed installation position 105 is a semicircular opening, and the avoidance port 106 is a deep arc opening. After the semicircular opening is injected with insulating glue and fixed, an approximately circular colloid is formed, and the circular colloid forms an equidistant safety distance with the avoidance port 106. At the same time, the size of the semicircular opening is adapted to the amount of glue, and after the glue is applied, the colloid is flush with the edge of the dust collecting sheet, or slightly lower than the edge of the dust collecting sheet, that is, part of the colloid is in the semicircular opening, and part is combined with the dust collecting sheet to form an approximately circular colloid, maintaining surface flatness and aesthetics. The design of equidistant safety distance utilizes the natural sedimentation of insulating glue and the combination of insulating glue and dust collecting sheets to form a nearly circular colloid, which mainly includes the two forms mentioned above; the design of equidistant safety distance can maximize the proportion of the conductive layer of the dust collecting sheet, thereby improving the purification efficiency and dust holding capacity of the purification device and extending the maintenance cycle; the design of equidistant safety distance, in the later stage of the operation of the purification device, a layer of dust will adhere to the surface of the colloid and the surface of the dust collecting sheet. The dust will have a certain conductivity when encountering high humidity and other environments, indirectly reducing the safety distance of the purification device. At this time, the dust collecting sheets and colloids connected with different potential voltages will generate leakage current due to the reduction of the electrical safety distance, thereby reducing the purification efficiency of the purification device and reducing the maintenance cycle.

[0078] Specifically, at the point where the rigid insulating member contacts the dust collecting sheet 700, the rigid insulating member increases in width along the length of the dust collecting sheet 700. At the same time, the rigid insulating member provides a dust collecting sheet gap to better engage the dust collecting sheet 700, increasing the fixed contact area of ​​the dust collecting sheet 700 and maintaining the stability of the spacing between the dust collecting sheets 700. Furthermore, insulating adhesive can be combined with the rigid insulating member, with one side of the dust collecting sheet 700 secured with the rigid insulating member and the other side secured with insulating adhesive. Furthermore, after the rigid insulating member engages the dust collecting sheet 700, it is further secured with insulating adhesive to increase stability.

[0079] In the purification device of this embodiment, please refer to Figures 12 to 14. The grounded dust collecting sheet and the high-voltage dust collecting sheet are arranged 180° alternately. At this time, an insulator 500 is provided between the frame 300 and the end of the grounding electrode sheet, and between the frame 300 and the end of the high-voltage electrode sheet.

[0080] Specifically, the conductor 400 is located at the end of the dust collecting sheet 700. At the same time, the conductor 400 is embedded in the power supply port 107. The outer surface of the conductor 400 is coated with insulating glue. The insulator 500 is located between the conductor 400 and the frame 300. At the same time, the grounded dust collecting sheet and the high-voltage dust collecting sheet are electrically connected to the frame 300 via wires 600.

[0081] Preferably, the insulator 500 may be an insulating rubber layer or a hollow plate. Specifically, a hollow plate is provided between the frame 300 and the end of the ground electrode sheet, and an insulating rubber layer is provided between the frame 300 and the end of the high-voltage electrode sheet.

[0082] In the purification device of this embodiment, referring to Figures 1 to 14, there is a gap 800 between the end of the grounded dust collecting sheet and the end of the high-voltage dust collecting sheet. In this case, the minimum spacing range between the process circular hole 103 and the end of the body 100 is [0, 4] mm. In some other embodiments, the end of the grounded dust collecting sheet is flush with the end of the high-voltage dust collecting sheet, that is, there is no gap between the ends of the two. In this case, the minimum spacing between the process circular hole 103 and the end of the body 100 is (0, 4] mm, and the end of the body 100 is insulated.

[0083] In the purification device of this embodiment, referring to FIG. 1 and FIG. 12 to FIG. 14 , the device further includes a high-voltage power supply, which is located inside or outside the frame 300 , that is, the high-voltage power supply can be built-in or external.

[0084] Furthermore, a number of alternately stacked grounded dust collecting sheets and high-voltage dust collecting sheets form a purification unit. The frame houses several purification units, with insulating plates installed between adjacent units to provide both fixation and insulation. Multiple purification units can be spliced ​​together to accommodate the purification needs of larger work surfaces.

[0085] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A dust collecting sheet, characterized in that, It includes a body, the body includes a rigid insulating layer and a conductive layer, the conductive layer is located on the upper surface and the lower surface of the rigid insulating layer, and a plurality of fixed mounting positions are provided along the length direction of the edge of the body.

2. The dust collecting sheet according to claim 1, wherein, The fixed mounting positions are set as groove-shaped openings and / or semi-circular openings, and the opening depths of adjacent fixed mounting positions are different.

3. The dust collecting sheet according to claim 1, characterized in that, A plurality of avoidance ports are further provided along the length direction of the edge of the body, the fixed mounting positions and the avoidance ports are arranged at intervals, the opening depths of the avoidance ports and the fixed mounting positions are different, and both the avoidance ports and the fixed mounting positions are set as groove-shaped openings and / or semi-circular openings.

4. The dust collecting sheet according to claim 1, characterized in that, One end of the body serves as a power connection end, and the power connection end is provided with a closing type power connection port.

5. The dust collecting sheet according to claim 4, characterized in that, The length of the conductive layer is less than or equal to the length of the rigid insulating layer, and the conductive layer extends to the power connection end.

6. The dust collecting sheet according to claim 1, wherein, A process round hole is provided at the end of the body, and the minimum distance between the process round hole and the end of the body is 0 - 4 mm.

7. The dust collecting sheet according to claim 1, wherein The distance between the edge of the conductive layer and the edge of the body is equal.

8. The dust collecting sheet according to claim 1, characterized in that, The conductive layer is made of a conductive material and an additive, the conductive material includes graphite, graphene or conductive ink, the additive includes silicone, and the rigid insulating layer is made of one or more of polycarbonate, polypropylene, ABS plastic, polyamide, polyoxymethylene, polytetrafluoroethylene, polycarbonate, glass fiber reinforced plastic, phenolic plastic.

9. The dust collecting sheet according to claim 8, wherein, The thickness of the rigid insulating layer is 0.1 - 2 mm, and the thickness of the conductive layer is 0.005 - 0.2 mm.

10. A purification device, characterized in that, It includes a frame body, and a plurality of alternately stacked grounding dust collecting sheets and high-voltage dust collecting sheets are arranged inside the frame body. The grounding dust collecting sheets and the high-voltage dust collecting sheets both adopt the dust collecting sheets according to any one of claims 1 - 9. The grounding dust collecting sheets and the high-voltage dust collecting sheets are respectively connected to a fixed spacer, and the fixed spacer is an insulating glue and / or a rigid insulating member.

11. A purification device according to claim 10, characterized in that, The grounding electrode sheet and the high-voltage electrode sheet are arranged staggered by 180°, and insulators are provided between the frame body and the end of the grounding electrode sheet, and between the frame body and the end of the high-voltage electrode sheet.

12. A purification device according to claim 10, characterized in that, It further includes a high-voltage power supply, and the high-voltage power supply is located inside or outside the frame body.

13. A purification device according to claim 11, characterized in that, A plurality of alternately stacked grounding dust collecting sheets and high-voltage dust collecting sheets form a purification unit. A plurality of purification units are provided inside the frame body, and insulating plates are provided between adjacent purification units.

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