A dust collecting sheet and a purification device

Abstract

The present invention relates to a dust collecting sheet and a purification device, belonging to the technical field of air purification. The dust collecting sheet includes a body, and 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. A plurality of fixed mounting positions are provided along the length direction of the edge of the body. The present invention can solve the technical problems in the prior art, such as short service life caused by using metal electrode plates, reduced purification efficiency due to corona discharge, large weight, high material cost, and high transportation cost.

Description

Technical Field

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

[0002] At present, the mainstream air purification technologies are divided into filtration technology and electrostatic technology. The filtration technology filters or adsorbs pollutants in the air through fibers and filtration materials based on fibers, thereby purifying the air. Its technology is mature and the operation is relatively stable. However, the labor cost, material cost, operation cost, and maintenance cost are very high, and there are certain safety risks if the maintenance is improper. Since the filtration material continuously intercepts pollutants in the air, the gaps between the fibers are continuously blocked, and the air resistance continuously increases. Therefore, it is necessary to frequently clean and replace the filtration material. At the same time, bacteria and viruses in the air remaining on the filtration material will cause problems such as bacterial reproduction, mildew of the filtration material, and odor. The electrostatic technology ionizes the particulate matter in the gas through an ionization module, and the charged particulate matter is adsorbed by the electric field formed by the dust collecting module to complete purification.

[0003] Various high-voltage electrostatic dust removal devices developed and designed based on the technical principle of the electrostatic technology can complete the purification of a relatively wide flow rate and relatively comprehensive particulate pollution, can be used relatively stably in different environments such as different temperatures and humidities, and can be better applied to air filtration treatment in the fields of household, commercial, industrial, tunnel, subway, etc. It has technical characteristics such as a long service life, high purification efficiency, low operation cost, and low maintenance cost. At present, most high-voltage electrostatic dust removal devices use metal plates, and the metal plates have the following disadvantages: 1. It is easy to be corroded, affecting the service life; 2. Burrs are likely to be generated at the edges of the metal plates, resulting in tip discharge, which in turn affects the purification efficiency; 3. The metal plates are relatively heavy, with high material costs and high transportation costs. Summary of the Invention

[0004] In view of the various deficiencies of the prior art, a dust collecting sheet and a purification device are proposed to solve the technical problems of short service life, reduced purification efficiency due to tip discharge, large weight, high material cost, and high transportation cost caused by the use of metal plates in the prior art.

[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, including 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 installation positions are provided along the length direction of the edge of the body.

[0007] This technical solution is further set as that the fixed installation positions are set as groove-shaped openings and / or semi-circular openings, and the opening depths of adjacent fixed installation positions are different.

[0008] This technical solution is further configured such that several avoidance ports are further provided along the length direction of the edge of the body, the fixed installation positions are spaced apart from the avoidance ports, the opening depths of the avoidance ports and the fixed installation positions are different, and both the avoidance ports and the fixed installation positions are configured as groove-shaped openings and / or semi-circular openings.

[0009] This 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] This technical solution is further configured such that one end of the body serves as a power connection end, and the power connection end is provided with a closed-mouth power connection port.

[0011] This 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] This technical solution is further configured such that the area of the end of the conductive layer at the power connection end is smaller than the area of the other end of the conductive layer.

[0013] This technical solution is further configured such that 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.

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

[0015] This technical solution is further configured such 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.

[0016] This 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, including a frame body, and several alternately stacked grounding dust collecting sheets and high-voltage dust collecting sheets are provided inside the frame body, and both the grounding dust collecting sheets and the high-voltage dust collecting sheets adopt the dust collecting sheets as described above.

[0018] This technical solution is further configured such that the grounding dust collecting sheets and the high-voltage dust collecting sheets are respectively connected to a fixed separator, and the fixed separator is an insulating glue and / or a rigid insulating member.

[0019] This technical solution is further configured such that the grounded dust collecting plates and the high-voltage dust collecting plates are arranged staggeredly by 180°, and insulators are provided between the frame and the ends of the grounded electrode plates and between the frame and the ends of the high-voltage electrode plates.

[0020] This technical solution is further configured to further include a high-voltage power supply, and the high-voltage power supply is located inside or outside the frame.

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

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

[0023] By providing the rigid insulating layer, on the premise of ensuring the strength and stability of the dust collecting plates, the thickness of the dust collecting plates is minimized to the greatest extent, the weight is light, the material cost and transportation cost are low, and compared with metal electrode plates, it is corrosion-resistant, which helps to extend the service life, there are no burrs, and the influence of tip discharge on the purification efficiency is avoided. The purification device made of the dust collecting plates with this structure has a larger effective ventilation area per unit area, a larger dust collecting area and dust capacity, higher efficiency, and a longer maintenance period. Description of the Drawings

[0024] Figure 1 is a top view of the dust collecting plate in the embodiment of the present invention;

[0025] Figure 2 is a side view of the dust collecting plate in the embodiment of the present invention;

[0026] Figure 3 is a top view of another embodiment of the dust collecting plate in the embodiment of the present invention;

[0027] Figure 4 is a top view of another embodiment of the dust collecting plate in the embodiment of the present invention;

[0028] Figure 5 is a top view of another embodiment of the dust collecting plate in the embodiment of the present invention;

[0029] Figure 6 is a top view of another embodiment of the dust collecting plate in the embodiment of the present invention;

[0030] Figure 7 is a top view of another embodiment of the dust collecting plate in the embodiment of the present invention;

[0031] Figure 8 is a top view of another embodiment of the dust collecting plate in the embodiment of the present invention;

[0032] Figure 9It is a top view of another implementation manner of the dust collecting sheet in the embodiment of the present invention;

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

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

[0035] Figure 12 It is a schematic diagram of the purification device in the embodiment of the present invention;

[0036] Figure 13 It is an exploded view of the purification device in the embodiment of the present invention;

[0037] Figure 14 It is Figure 13 The partial schematic diagram at position A in

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

[0039] 101, the rigid insulating layer; 102, the conductive layer; 103, the process round hole; 104, the insulating gap; 105, the fixed installation position; 106, the avoidance port; 107, the power connection port; 108, the first electrical safety area; 109, the second electrical safety area; 110, the groove. Detailed implementation manners

[0040] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be 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 those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application. In addition, the directional terms mentioned in the following embodiments, such as "upper", "lower", "left", "right", etc., are only the directions with reference to the drawings. Therefore, the directional terms used are for illustration rather than to limit the present invention.

[0041] According to an embodiment of the present invention, a dust collecting sheet is provided. Please refer to Figure 1 and Figure 2 , which includes a main body 100. The main body 100 includes 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. A plurality of fixed installation positions 105 are provided along the length direction of the edge of the main body 100.

[0042] It should be noted that by setting the rigid insulating layer 101, on the premise of ensuring the strength and stability of the dust collecting sheet, the thickness of the dust collecting sheet is minimized, the weight is light, the material cost and transportation cost are low. Compared with the metal electrode plate, it is corrosion-resistant, which helps to extend the service life. There are no burrs, avoiding the influence of tip discharge on the purification efficiency. The purification device made of 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 set in a long strip shape, and it can be set to 1 strip or multiple strips.

[0044] In the dust collecting sheet of this embodiment, please refer to Figure 1 , the fixed mounting position 105 is set as a groove-shaped opening and / or a semi-circular opening, and the opening depths of adjacent fixed mounting positions 105 are different.

[0045] Among them, the fixed mounting position with a small depth is used to connect and fix the isolation member, and the fixed isolation member is an insulating glue and / or a rigid insulating member, and the fixed mounting position with a large depth serves as an avoidance port.

[0046] In the dust collecting sheet of this embodiment, please refer to Figure 3 , along the length direction of the edge of the body 100, several avoidance ports 106 are also provided. The fixed mounting position 105 and the avoidance port 106 are arranged at intervals. The opening depths of the avoidance port 106 and the fixed mounting position 105 are different, and both the avoidance port 106 and the fixed mounting position 105 are set as groove-shaped openings and / or semi-circular openings.

[0047] Specifically, please refer to Figure 3 , the fixed mounting position 105 is set as a shallow arc opening, and the avoidance port 106 is set as a groove-shaped opening. Please refer to Figure 7 , the fixed mounting position 105 is a shallow arc opening, and the avoidance port 106 is set as a semi-circular opening. In addition, both the fixed mounting position 105 and the avoidance port 106 can also be set as groove-shaped openings. Please refer to Figure 8 , both the fixed mounting position 105 and the avoidance port 106 are set as groove-shaped openings. At the same time, a deepening port in the shape of a semi-circular opening is provided on the bottom surface of the fixed mounting position 105.

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

[0049] It should be noted that the groove 110 increases the contact area between the fixed installation position 105 and the colloid, enabling the vertical application of glue to the purification and dust removal module. The vertical glue application can be carried out on two surfaces simultaneously, resulting in a faster production speed. With the design of the groove 110, more colloid can penetrate into the groove 110 during vertical glue application, forming a combination of the colloid and the dust collection sheet within the groove 110, with a larger contact area and better firmness.

[0050] For the dust collection sheet in this embodiment, please refer to Figure 1 , one end of the body 100 serves as the power connection end, and the power connection end is provided with a closed-mouth power connection port 107.

[0051] It should be noted that power connection is achieved by inserting a metal wire / rod into the power connection port 107. The closed-mouth power connection port 107 exerts an inward force on the metal wire / rod, resulting in a higher degree of fit between the metal wire / rod and the conductive layer 102.

[0052] Please refer to Figure 1 , the closed-mouth power connection port 107 includes an open end and a closed end. A protruding end is provided between the open end and the closed end, and the metal wire / rod enters the power connection port 107 from the open end. The cross-section of the closed-mouth power connection port 107 is an isosceles trapezoid. The upper base of the isosceles trapezoid serves as the open end, the lower base serves as the closed end, and the waist serves as the protruding end. The protruding end exerts an inward force on the metal wire / rod to achieve the clamping 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 this angle is less than 10°, it is relatively easy to clamp the power connection port 107 and the metal wire / rod, but the firmness after clamping is poor. When this angle is greater than 25°, it is relatively difficult to clamp the power connection port 107 and the metal wire / rod, but the firmness after clamping is good. When this angle is 15°, it is relatively easy to clamp the power connection port 107 and the metal wire / rod, and the firmness after clamping is good.

[0054] Meanwhile, an arc matching the metal wire / rod can be provided at the protruding end, such that after the metal wire / rod is clamped into the power connection port 107, a part of the metal wire / rod falls into the arc, resulting in a tighter clamping connection.

[0055] In addition, the cross-section of the closed-mouth power connection port 107 can also be set as an arc shape. The contact area between the arc shape and the metal wire / rod is increased, resulting in better power connection stability. Preferably, the arc shape is a major arc. The diameter of the metal wire / rod matches the arc shape, and the gap is 0.2 - 1 mm. When the gap < 0.2 mm, the gap between the metal wire / rod and the arc shape is too small, making it difficult to clamp, and the production and processing process requirements are too high. When the gap > 1 mm, the gap between the metal wire / rod and the arc shape is too large, and it will become loose after clamping, resulting in poor power connection stability.

[0056] In the dust collecting sheet of this embodiment, please refer to Figure 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 the dust collecting sheet of this embodiment, the area of the end of the conductive layer 102 located at the power connection end is smaller than the area of the other end of the conductive layer 102 to increase electrical safety. During assembly, several dust collecting sheets are butted inside the frame to form a purification device. At the same time, an insulator is provided between the end of the main body 100 and the frame for insulation treatment. The reduced area of the end of the conductive layer 102 located at the power connection end can prevent the end of the conductive layer 102 from being too close to the frame in terms of electrical safety distance, affecting the stable operation in the later stage.

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

[0059] Please refer to Figure 6 , the end of the conductive layer 102 located at the power connection end is provided with a notch, and this notch forms a second electrical safety area 109. Two of the second electrical safety areas 109 are symmetrically arranged, and the second electrical safety area 109 is square. The symmetrical structure design can maintain the uniformity of the electrical safety distance. Specifically, the conductive layer 102 extends to the area between this notch and the power connection port 107.

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

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

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

[0063] It should be noted that, according to the shapes of the fixed installation position 105 and the avoidance port 106, the edge shape of the conductive layer 102 is designed to make full use of the effective area of the body 100, maximize the proportion of the conductive layer 102, and at the same time not affect electrical safety, which 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 capacity of the purification device.

[0064] Please refer to Figure 11 , both the fixed installation position 105 and the avoidance port 106 are semi-circular openings. Therefore, the edge of the conductive layer 102 is similar to a wave shape. Please refer to Figure 10 , the avoidance port 106 is a groove-shaped opening, and the fixed installation position 105 is located between adjacent avoidance ports 106. Therefore, the edge of the conductive layer 102 is similar to a rectangular tooth shape.

[0065] In order to verify whether conductive layers of different shapes have an impact on the purification efficiency of the purification device, the inventor conducted the following experiment. A purification device with a length of 500 mm, a width of 400 mm, and a thickness of 50 mm was compared. Under the same conditions of the ionization device and ionization voltage at the front end and in the same environment, the PM2.5 purification efficiency of the purification device was compared at two wind speeds. The experimental data is shown in Table 1.

[0066] Table 1:

[0067]

[0068] It can be concluded from Table 1 that: the waveform (please refer to Figure 11 ) has the largest proportion of the conductive layer 102, and its PM2.5 purification efficiency is the highest at both wind speeds; the square (please refer to Figure 10 ) has a proportion of the conductive layer 102 second only to the waveform, and its PM2.5 purification efficiency is also relatively high; at a high wind speed of 3 m / s, the ordinary (please refer to Figure 7 ) has the smallest proportion of the conductive layer 102, and the gap between its efficiency and that of the waveform and square is the largest and most obvious. Therefore, increasing the proportion of the conductive layer 102 is beneficial to ensuring the PM2.5 purification efficiency of the purification device, and the increase in efficiency will correspondingly increase the dust capacity of the purification device.

[0069] In the dust collecting sheet of this embodiment, please refer to Figure 1 and Figure 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.

[0070] 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 functional new material made by compounding synthetic resin and glass fiber. Its relative density is between 1.5 and 2.0, only 1 / 4 to 1 / 5 of carbon steel, but its tensile strength is close to or even exceeds that of carbon steel, and its strength can be comparable to that of high-grade alloy steel. Using its high strength, the thickness of the dust collecting sheet can be minimized to the greatest extent. The purification device made of 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.

[0071] For the dust collecting sheet in this embodiment, please refer to Figure 1 and Figure 2 , the thickness of the rigid insulating layer 101 is 0.1 - 2 mm, and the thickness of the conductive layer 102 is 0.005 - 0.2 mm. If the thickness of the rigid insulating layer 101 is too thin, such as less than 0.1 mm, the support strength is insufficient and the dust collecting sheet is prone to deformation. If the thickness of the rigid insulating layer 101 is too thick, such as greater than 2 mm, the thickness of the dust collecting sheet is relatively thick, and the effective ventilation area per unit area of the corresponding purification device becomes smaller, and the purification efficiency and dust holding capacity are significantly reduced. In the range of 0.1 - 2 mm, the supportability, thickness, purification efficiency, and dust holding capacity can be balanced. If the thickness of the conductive layer 102 is too thin, such as less than 0.005 mm, the production and processing difficulty is large, and the layer thickness is not easy to control. If the thickness of the conductive layer 102 is too thick, such as greater than 0.2 mm, the processing difficulty is large, the adhesion force is insufficient, and there is a risk of peeling off of the outer conductive layer. In the range of 0.005 - 0.2 mm, the processing difficulty and stability can be balanced.

[0072] In order to verify whether different thicknesses of the rigid insulating layer have an impact on the purification efficiency of the purification device, the inventor conducted the following experiment. The purification devices with a length of 500 mm, a width of 300 mm, and a thickness of 45 mm were compared. Under the same conditions of the ionization device and ionization voltage at the front end and in the same environment, the impact of different thicknesses of the rigid insulating layer on the PM2.5 purification efficiency was compared. The experimental data are shown in Table 2.

[0073] Table 2:

[0074]

[0075]

[0076] It can be obtained from Table 2 that when the thickness of the rigid insulating layer is less than 0.1 mm, the supporting strength is insufficient, the dust collecting sheet is prone to deformation, and the PM2.5 purification efficiency is very low; when the thickness of the rigid insulating layer is greater than 2 mm, the thickness of the dust collecting sheet is relatively thick, and the effective ventilation area per unit area of the corresponding purification device becomes smaller, and the purification efficiency is significantly reduced; in the range of 0.1-2 mm, a good range of supporting strength, thickness, maintaining purification efficiency and dust capacity can be taken into account.

[0077] According to an embodiment of the present invention, a purification device is provided. Please refer to Figure 12 , which includes a frame body 300. A plurality of grounded dust collecting sheets and high-voltage dust collecting sheets are alternately stacked inside the frame body 300, and both the grounded dust collecting sheet and the high-voltage dust collecting sheet adopt the dust collecting sheet 700 described above.

[0078] In the purification device of this embodiment, please refer to Figure 12 , the grounded dust collecting sheet and the high-voltage dust collecting sheet are respectively connected to a fixed spacer 200, and the fixed spacer 200 is an insulating glue and / or a rigid insulating member.

[0079] Specifically, the insulating glue has high bonding strength and can withstand high and low temperature impacts, such as PUR glue on the market; it can also be fixed with hot melt glue. The purification device fixed with hot melt glue has limited application fields and cannot be used in environments with large temperature differences throughout the year or large temperature differences between morning and evening. The hot melt glue is easy to soften at high temperatures and crack at low temperatures.

[0080] Among them, after pouring and fixing the insulating glue into the shallow arc opening, an approximately circular colloid is formed. The circular colloid forms an equidistant safety distance from 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 collection sheet or slightly lower than the edge of the dust collection sheet, that is, a part of the colloid is inside the shallow arc opening and a part is combined with the dust collection sheet to form an approximately circular colloid, maintaining the surface flatness and aesthetics. Or the fixed installation position 105 is a semi-circular opening, and the avoidance port 106 is a deep arc opening. After pouring and fixing the insulating glue into the semi-circular opening, an approximately circular colloid is formed. The circular colloid forms an equidistant safety distance from the avoidance port 106. At the same time, the size of the semi-circular opening is adapted to the amount of glue, and after applying the glue, the colloid is flush with the edge of the dust collection sheet or slightly lower than the edge of the dust collection sheet, that is, a part of the colloid is inside the semi-circular opening and a part is combined with the dust collection sheet to form an approximately circular colloid, maintaining the surface flatness and aesthetics. The design of the equidistant safety distance uses the natural settlement of the insulating glue and the combination of the insulating glue and the dust collection sheet to form an approximately circular colloid, mainly including the above two forms; the design of the equidistant safety distance can improve the proportion of the conductive layer of the dust collection sheet as much as possible, thereby improving the purification efficiency and dust capacity of the purification device and extending the maintenance cycle; the design of the 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 collection sheet. The dust will have a certain conductivity when encountering environments such as high humidity, indirectly reducing the safety distance of the purification device. At this time, the dust collection sheets and the colloid 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.

[0081] Specifically, at the contact between the rigid insulating part and the dust collection sheet 700, the width of the rigid insulating part is increased along the length direction of the dust collection sheet 700. At the same time, the rigid insulating part is provided with a dust collection sheet slot to better clamp the dust collection sheet 700, increasing the fixed contact area with the dust collection sheet 700 and promoting the stability of the distance between the dust collection sheets 700. In addition, the insulating glue and the rigid insulating part can be combined. One side of the dust collection sheet 700 is fixed by the rigid insulating part, and the other side is fixed by the insulating glue. In addition, after the rigid insulating part clamps the dust collection sheet 700, the insulating glue is used for fixing to increase the stability.

[0082] In the purification device of this embodiment, please refer to Figures 12 to 14 , the grounded dust collection sheet and the high-voltage dust collection sheet are arranged staggeredly at 180°. At this time, insulators 500 are provided between the end of the frame 300 and the grounded electrode sheet and between the end of the frame 300 and the high-voltage electrode sheet.

[0083] 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 connection port 107. The outer side of the conductor 400 is coated with insulating glue, and 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 respectively electrically connected to the frame 300 through wires 600.

[0084] Preferably, the insulator 500 can be an insulating glue layer or a hollow plate. Specifically, a hollow plate is provided between the end of the frame 300 and the grounded electrode sheet, and an insulating glue layer is provided between the end of the frame 300 and the high-voltage electrode sheet.

[0085] In the purification device of this embodiment, please refer 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. At this time, the minimum distance range between the process round 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 and the end of the high-voltage dust collecting sheet are flush, that is, there is no gap between their ends. At this time, the minimum distance between the process round hole 103 and the end of the body 100 is (0, 4] mm, and the end of the body 100 is insulated.

[0086] In the purification device of this embodiment, please refer to Figure 1 , Figures 12 to 14 , it further includes a high-voltage power supply. The high-voltage power supply is located inside or outside the frame 300. That is to say, the high-voltage power supply can be built-in or external.

[0087] In addition, several alternately stacked grounded dust collecting sheets and high-voltage dust collecting sheets form a purification unit. Several purification units are provided inside the frame. An insulating plate is provided between adjacent purification units, and the insulating plate plays a role in fixing and insulating. Several purification units are spliced to meet the purification requirements of a larger-size working surface.

[0088] The present invention has been described in detail above. The above is only the preferred embodiment of the present invention, and it cannot limit the scope of the present invention. That is, all equal changes and modifications made according to the scope of this application should still fall within the scope covered by the present invention.

Claims

1. A purification device, characterized in that, It includes a housing, inside which there are several grounded dust collecting sheets and high-voltage dust collecting sheets arranged alternately in a stacked manner. Both the grounded dust collecting sheets and the high-voltage dust collecting sheets are made of dust collecting sheets. The grounded dust collecting sheets and the high-voltage dust collecting sheets are respectively connected to fixed isolating members. The fixed isolating members are insulating glue and / or rigid insulating members. Several grounded dust collecting sheets and high-voltage dust collecting sheets arranged alternately in a stacked manner form a purification unit. There are several purification units inside the housing, and insulating plates are provided between adjacent purification units. The dust collecting sheet includes a body, and 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. Along the length direction of the edge of the body, there are several fixed mounting positions. There is a process round hole at the end of the body, and the minimum distance between the process round hole and the end of the body is 0 mm. The process round hole is located at the power connection end of the body, and it also serves as a power connection port. The power connection end is provided with a closed-end power connection port. The closed-end power connection port includes an open end and a closed end. There is a protruding end between the open end and the closed end. A metal wire / rod enters the power connection port from the open end, and the protruding end forms an inward acting force on the metal wire / rod to realize the clamping connection between the power connection port and the metal wire / rod. The conductive layer extends to the power connection end, and the area of the conductive layer at the end of the power connection end is smaller than the area of the other end of the conductive layer. An electrically safe area symmetrical to the power connection port is formed between the power connection end and the conductive layer.

2. The purification device according to claim 1, characterized in that, The fixed mounting position is set as a groove-shaped opening and / or a semi-circular opening, and the opening depths of adjacent fixed mounting positions are different.

3. The purification device according to claim 1, characterized in that, Along the length direction of the edge of the body, there are also several avoidance ports. 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 purification device according to claim 1, characterized in that, The length of the conductive layer is less than or equal to the length of the rigid insulating layer.

5. The purification device according to claim 1, characterized in that, The distance between the edge of the conductive layer and the edge of the body is equal.

6. The purification device 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, and the additive includes silicone. 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.

7. A purification device according to claim 6, characterized in 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.

8. The purification device according to claim 1, wherein The grounded dust collecting sheet and the high-voltage dust collecting sheet are arranged in a 180° staggered manner, and insulators are provided between the housing and the ends of the grounded dust collecting sheet and between the housing and the ends of the high-voltage dust collecting sheet.

9. A purification device according to claim 1, wherein, It also includes a high-voltage power supply, and the high-voltage power supply is located inside or outside the housing.

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