Electrostatic filter, air cleaning device and ventilation system

Abstract

The application discloses an electrostatic filter, an air purification device and a ventilation system. The electrostatic filter comprises a plurality of electrode sheets arranged in parallel along a first direction, the electrode sheets comprising first electrode sheets and second electrode sheets arranged alternately along the first direction, respectively serving as high-voltage electrode sheets and low-voltage electrode sheets, and a high-voltage electrostatic field being formed between adjacent electrode sheets. The first electrode sheet comprises a first insulating base material and a first conductive layer arranged on one side of the first insulating base material, and the second electrode sheet comprises a second insulating base material and a second conductive layer arranged on one side of the second insulating base material, wherein the first conductive layer and the second conductive layer are arranged on the same side surface of the corresponding insulating base material and are arranged in a staggered manner in the height direction. Through the above structure, the conductive edges of adjacent electrode sheets are no longer directly opposite, and the potential creeping or discharging path needs to be detoured along the surface of the insulating base material, thereby reducing the local electric field concentration and reducing the possibility of discharging, and the electrostatic filter is suitable for electrostatic filtering applications with small electrode sheet spacing.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and in particular to an electrostatic filter, an air purification device, and a ventilation system. Background Technology

[0002] Electrostatic precipitators are widely used in air purification and ventilation systems. They are typically installed inside air ducts and work by applying a high-voltage electric field between adjacent electrodes, which charges and adsorbs airborne pollutants, thus purifying the air. In practical engineering applications, electrostatic precipitators often need to be used in conjunction with rectangular air ducts to adapt to the existing ventilation system structure.

[0003] Existing electrostatic precipitators typically consist of multiple sets of adjacent electrode plates, forming a high-voltage electrostatic field between them. To improve purification performance and fully utilize the space of rectangular ducts, it is often desirable to reduce the spacing between adjacent electrode plates during the design process. However, when the electrode spacing is reduced, a large high-voltage potential difference exists between adjacent electrodes, which can easily lead to high-voltage discharge, affecting the stability of the electrostatic field and potentially causing noise or safety hazards.

[0004] For example, in an existing electrostatic dust removal device (such as publication number CN118321010A), the electrodes are made of metal plates. Due to the large high-voltage potential difference between adjacent metal plates, and the unavoidable micro-burrs on the edges of the metal plates during processing or use, discharge arcing is prone to occur when the electrode spacing is reduced, accompanied by a noticeable arcing sound, thus limiting the applicability of this type of structure in practical applications.

[0005] To reduce the risk of discharge, another existing technology involves setting insulating layers on both sides of the conductive layer of the electrodes in the electrostatic precipitator and then using an adhesive method to cover the conductive layers. This improves the insulation performance between adjacent electrodes, thereby reducing the possibility of discharge. However, this type of solution usually requires increasing the thickness or coverage area of ​​the insulating layer, which increases the overall thickness of the electrode structure. In situations where the space of a rectangular air duct is limited, this makes it difficult to further reduce the electrode spacing.

[0006] Furthermore, existing technologies (such as CN120346911A) propose a structure where the electrode has a conductive layer on one side and an insulating layer on the other to reduce the discharge risk caused by direct exposure of the conductive layer. While this approach alleviates the discharge problem to some extent, in rectangular duct applications, since the electrodes are typically arranged in parallel, the spacing between adjacent electrode sheets often needs to be further reduced to fully utilize the duct cross-sectional area, making discharge phenomena still likely under these conditions. Additionally, existing technologies (such as CN120346911A) propose a flexible electrode sheet formed by a composite of a flexible insulating layer and a conductive layer, and that is wound using a method such as... Figures 11 to 12 As shown, the conductive layer is formed together with the flexible insulating layer, thereby controlling the spacing between the conductive layers in the electrode stacking state to ensure the stability of the electrode structure. However, this technical solution uses winding molding as the core means of forming the electrode structure, and the overall shape of its electrode 140 is usually circular or rounded. When this type of wound electrode 140 is applied to a rectangular air duct 150, due to the geometric mismatch between the winding structure and the outline of the rectangular air duct 150, areas that cannot be effectively covered by the electrode 140 are inevitably formed in the corners and middle areas of the air duct, thus occupying the cross-sectional area of ​​the air duct and making it difficult to fully utilize the effective dust collection area within the rectangular air duct 150.

[0007] In summary, existing electrostatic precipitators, when used in rectangular duct applications, still struggle to effectively prevent high-voltage discharge while reducing electrode spacing, and require further improvement. Summary of the Invention

[0008] Therefore, the technical problem to be solved by the present invention is to overcome the problem that high voltage discharge is easily generated when the electrode spacing is reduced in the application scenario of rectangular air duct in the prior art.

[0009] To solve the above-mentioned technical problems, in a first aspect, the present invention provides an electrostatic filter, including a plurality of electrode sheets arranged parallel to each other along a first direction, the electrode sheets extending along a second direction, the second direction being perpendicular to the first direction, and the second direction being defined as the height direction;

[0010] The electrode sheet includes a first electrode sheet and a second electrode sheet, which are alternately arranged along the first direction. The first electrode sheet and the second electrode sheet are respectively a high-voltage electrode sheet and a low-voltage electrode sheet, and a high-voltage electrostatic field is formed between adjacent first electrode sheets and second electrode sheets.

[0011] The first electrode sheet includes a first insulating substrate and a first conductive layer disposed on one side of the first insulating substrate; the second electrode sheet includes a second insulating substrate and a second conductive layer disposed on one side of the second insulating substrate.

[0012] The first conductive layer and the second conductive layer are both disposed on the same side surface of the corresponding insulating substrate, and the first conductive layer and the second conductive layer are offset in the height direction.

[0013] In one embodiment of the present invention, the top end of the first conductive layer is flush with the top end of the first insulating substrate, and the first insulating substrate forms a first insulating region below the first conductive layer along the height direction; the bottom end of the second conductive layer is flush with the bottom end of the second insulating substrate, and the second insulating substrate forms a second insulating region above the second conductive layer along the height direction.

[0014] In one embodiment of the present invention, the first conductive layer is centrally disposed on the first insulating substrate along a third direction, and the first insulating substrate forms a third insulating region on both sides of the first conductive layer along the third direction.

[0015] The second conductive layer is centrally disposed on the second insulating substrate along the third direction, and the second insulating substrate forms a fourth insulating region on both sides of the second conductive layer along the third direction.

[0016] The third direction is defined as the width direction of the electrode sheet, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0017] In one embodiment of the present invention, a spacer structure is further included, the spacer structure being disposed between the first electrode sheet and the second electrode sheet, the spacer structure being used to maintain a predetermined distance between the first electrode sheet and the second electrode sheet.

[0018] In one embodiment of the present invention, the spacing structure comprises a plurality of spacer pillars, wherein the plurality of spacer pillars are disposed between the first insulating substrate of the first electrode sheet and the adjacent second electrode sheet, and between the second insulating substrate of the second electrode sheet and the adjacent first electrode sheet.

[0019] In one embodiment of the present invention, a plurality of spacers are respectively disposed in a third insulating region of the first insulating substrate and a fourth insulating region of the second insulating substrate.

[0020] In one embodiment of the present invention, the spacer posts disposed on the first electrode sheet and the spacer posts disposed on the second electrode sheet are staggered in the height direction.

[0021] In one embodiment of the present invention, the spacer post is integrally formed with the corresponding first insulating substrate or second insulating substrate.

[0022] In one embodiment of the present invention, the electrostatic filter has a first current-carrying conductive layer at the top and a second current-carrying conductive layer at the bottom; the first current-carrying conductive layer is electrically connected to a plurality of first conductive layers, and the second current-carrying conductive layer is electrically connected to a plurality of second conductive layers.

[0023] In one embodiment of the present invention, the first bus conductive layer is formed by coating the top ends of a plurality of first electrode sheets with conductive paint or conductive adhesive; the second bus conductive layer is formed by coating the bottom ends of a plurality of second electrode sheets with conductive paint or conductive adhesive.

[0024] In one embodiment of the present invention, the first bus conductive layer is electrically connected to the first conductive contact piece via a first wire, and the second bus conductive layer is electrically connected to the second conductive contact piece via a second wire.

[0025] In one embodiment of the present invention, a connecting rod and a mounting frame are further included. The first electrode sheet and the second electrode sheet are each provided with mounting through holes. The connecting rod passes through the mounting through holes of the plurality of electrode sheets along the first direction and is connected to the mounting frame.

[0026] In one embodiment of the present invention, a through-hole structure for air passage is formed between adjacent first electrode plates and second electrode plates, and a plurality of such through-hole structures are arranged along the first direction.

[0027] In one embodiment of the present invention, the mounting frame includes a top frame, a bottom frame, and a side frame. The top frame and the bottom frame are respectively provided with a potting groove, and the side frame is provided with a potting opening communicating with the potting groove. The potting opening is used to pour insulating potting compound into the potting groove, and the potting groove is provided with an insulating potting structure formed by the insulating potting compound.

[0028] In one embodiment of the present invention, the inner wall of the potting opening is provided with a guide slope, which extends obliquely toward the potting groove in a direction away from the potting opening, so as to guide the injected insulating potting compound into the potting groove.

[0029] In one embodiment of the present invention, the first conductive layer and the second conductive layer are respectively aluminum foil, and the first conductive layer and the second conductive layer are respectively bonded to the first insulating substrate and the second insulating substrate by adhesive backing; or, the first conductive layer and the second conductive layer are respectively conductive layers formed of conductive metal or conductive ink.

[0030] In one embodiment of the present invention, the gap between adjacent first electrode plates and second electrode plates is 1 mm to 1.5 mm.

[0031] In one embodiment of the present invention, the thickness of the first insulating substrate and the second insulating substrate is 0.1 mm to 0.3 mm; the thickness of the first conductive layer and the second conductive layer is 0.1 mm to 0.3 mm.

[0032] In a second aspect, the present invention also provides an air purification device or ventilation system, including a rectangular air duct and an electrostatic filter disposed within the rectangular air duct, wherein the electrostatic filter is the electrostatic filter provided in the first aspect.

[0033] The technical solution of the present invention has the following advantages compared with the prior art:

[0034] In this application, both the first and second electrode sheets adopt a structure consisting of an insulating substrate and a conductive layer disposed on one side of the insulating substrate, with the conductive layer only disposed on the same side surface of the corresponding insulating substrate. This single-sided conductive structure ensures that the conductive layer participates in the formation of a high-voltage electrostatic field only on one side of the electrode sheet, while the other side of the electrode sheet remains in an insulating state. Structurally, this avoids the formation of potential close-range discharge channels on the back or opposite side of the electrode sheet, reducing the basic conditions for discharge between adjacent electrode sheets.

[0035] Building upon this, this application further staggers the first and second conductive layers in the height direction, ensuring that the conductive layers of adjacent high-voltage and low-voltage electrode sheets are not in the same corresponding position in the height direction. Because the conductive layers are staggered in the height direction, the conductive edges between adjacent electrode sheets are no longer directly opposite each other. Potential discharge or creepage paths must extend and bypass along the surface of the insulating substrate. This forces the discharge or creepage path to bypass along the surface of the insulating substrate, rather than forming the shortest direct crossing path between adjacent conductive edges. Consequently, the discharge or creepage distance is significantly increased, weakening the concentration effect of the local electric field and structurally improving the anti-creep capability between adjacent electrode sheets.

[0036] Based on the synergistic effect of the aforementioned single-sided conductive structure and the staggered arrangement in the height direction, even when the spacing between adjacent electrode sheets is reduced, sufficient insulation path length can still be maintained between the conductive layers. This allows for the establishment of a stable high-voltage electrostatic field between the electrode sheets, avoiding high-voltage discharge problems caused by the conductive edges being too close or too far apart. Therefore, this application can effectively suppress the risk of high-voltage discharge under small-pitch arrangement conditions without thickening the insulation layer or introducing complex insulation structures.

[0037] Therefore, the electrostatic filter described in this application can achieve a high-density and compact arrangement of electrode sheets while ensuring operational safety and electric field stability. It is especially suitable for applications with limited space, such as rectangular air ducts, where the utilization rate of the air passage area is high, and has good engineering applicability. Attached Figure Description

[0038] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0039] Figure 1 The explosion of the electrostatic filter provided by this invention Figure 1 ;

[0040] Figure 2 The explosion of the electrostatic filter provided by this invention Figure 2 ;

[0041] Figure 3 This is a schematic diagram of the structure of the electrostatic filter provided by the present invention;

[0042] Figure 4 This is a partial schematic diagram of the electrostatic filter provided by the present invention;

[0043] Figure 5 This is a schematic diagram of the structure of the first electrode sheet provided by the present invention;

[0044] Figure 6 This is a schematic diagram of the structure of the second electrode sheet provided by the present invention;

[0045] Figure 7 This is a side view schematic diagram provided by the present invention for illustrating the creepage path;

[0046] Figure 8 This is a top projection view provided by the present invention for illustrating the creepage clearance in the width direction;

[0047] Figure 9 This is a structural schematic diagram of the side frame provided by the present invention;

[0048] Figure 10 This is an enlarged structural schematic diagram of the location of the guide slope provided by the present invention;

[0049] Figure 11 This is a schematic diagram of the structure of electrodes and rectangular air ducts in existing technology. Figure 1 ;

[0050] Figure 12 This is a schematic diagram of the structure of electrodes and rectangular air ducts in existing technology. Figure 2 .

[0051] Explanation of reference numerals in the accompanying drawings: In this invention: 10, First electrode sheet; 11, First insulating substrate; 12, First conductive layer; 20, Second electrode sheet; 21, Second insulating substrate; 22, Second conductive layer; 30, First insulating region; 40, Second insulating region; 50, Third insulating region; 60, Fourth insulating region; 70, Spacer post; 80, First conductive contact sheet; 90, Second conductive contact sheet; 100, Mounting frame; 101, Top frame; 102, Bottom frame; 103, Side frame; 104, Glue potting groove; 105, Glue potting opening; 106, Guide slope; 110, Connecting rod; 120, Dashed line one; 130, Dashed line two.

[0052] Existing technologies: 140, electrode; 150, rectangular air duct. Detailed Implementation

[0053] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention. Example 1:

[0054] See Figures 1 to 4 As shown, this embodiment 1 provides an electrostatic filter, including a plurality of electrode plates arranged parallel to each other along a first direction. The electrode plates extend along a second direction, which is perpendicular to the first direction and defined as the height direction. The plurality of electrode plates are spaced apart along the first direction to form a filter channel for air passage.

[0055] The electrode sheet includes a first electrode sheet 10 and a second electrode sheet 20, which are alternately arranged along a first direction. The first electrode sheet 10 is a high-voltage electrode sheet, and the second electrode sheet 20 is a low-voltage electrode sheet. A high-voltage electrostatic field is formed between adjacent first electrode sheets 10 and second electrode sheets 20.

[0056] The first electrode sheet 10 includes a first insulating substrate 11 and a first conductive layer 12 disposed on one side of the first insulating substrate 11, and the second electrode sheet 20 includes a second insulating substrate 21 and a second conductive layer 22 disposed on one side of the second insulating substrate 21.

[0057] The first conductive layer 12 and the second conductive layer 22 are both disposed on the same side surface of the corresponding insulating substrate and are staggered in the height direction. The first conductive layer 12 and the second conductive layer 22 are staggered in the height direction, that is, the conductive layers of adjacent first electrode sheets 10 and second electrode sheets 20 are not in the same corresponding position in the height direction, thereby creating a gap in the conductive edges of adjacent electrode sheets in the height direction.

[0058] In this embodiment, the insulating substrate can be made of high-voltage resistant insulating material, such as engineering plastics, insulating composite materials, or other materials with good insulating properties. The first conductive layer 12 and the second conductive layer 22 can be made of aluminum foil as the conductive material. The aluminum foil has a single-sided adhesive backing structure, and its adhesive backing is respectively bonded and fixed to the corresponding surfaces of the first insulating substrate 11 and the second insulating substrate 21, thereby forming a stable conductive layer structure. By using adhesive backing bonding, the conductive layer can be firmly attached to the surface of the insulating substrate without adding additional fixing structures, which simplifies the manufacturing process of the electrode sheet and helps to ensure the stability and flatness of the conductive layer under long-term working conditions, avoiding the problem of uneven electric field caused by edge lifting or local detachment. In other embodiments, the first conductive layer 12 and the second conductive layer 22 can also be formed by conductive metal coating or conductive ink, and directly coated or printed on the corresponding insulating substrate surface.

[0059] During use, the electrostatic filter connects a high-voltage power supply to the first electrode plate 10 and a low-voltage power supply or grounding terminal to the second electrode plate 20, creating a high-voltage electrostatic field between adjacent first electrode plates 10 and second electrode plates 20. When dust-laden air flows along the channel between the electrode plates, the airborne particles are ionized and charged under the influence of the high-voltage electrostatic field. Subsequently, under the influence of the electric field force, they migrate towards the surface of the electrode plates and are adsorbed, thereby achieving the filtration of airborne particles.

[0060] Since the first conductive layer 12 and the second conductive layer 22 are only disposed on the same side surface of the corresponding insulating substrate, the directly exposed conductive area between adjacent electrode sheets is reduced, and the high-voltage electrostatic field is mainly distributed in the area on the opposite side of the electrode sheets, which is conducive to the stable establishment of the electric field. In addition, the conductive layer only participates in the formation of the high-voltage electrostatic field on one side of the electrode sheet, which structurally reduces the possibility of forming a close-range discharge channel between adjacent electrode sheets.

[0061] See Figure 7 , Figure 7 This is a side view of the creepage path. Because the electrode sheet is relatively large in the height direction, this figure uses a side view to illustrate the effect of the conductive layer being misaligned in the height direction on the creepage path. This diagram does not represent the actual structural shape or proportions of the electrode sheet.

[0062] Figure 7The dashed line 120 illustrates the potential creepage path between adjacent first electrode plates 10 and second electrode plates 20. When the first conductive layer 12 and the second conductive layer 22 are staggered in the height direction, so that their conductive edges are no longer directly opposite each other, and the first conductive layer 12 and the second conductive layer 22 are separated by an insulating substrate, creepage no longer forms a direct crossing path between adjacent conductive edges. Instead, it needs to detour along the surface of the insulating substrate, effectively lengthening the creepage path in the height direction. This weakens the local electric field concentration effect, thereby improving the anti-discharge capability between adjacent electrode plates. The path shown by the dashed line 120 characterizes the effect of significantly extending the creepage path compared to a direct path, illustrating the suppression effect of the electrode structure of this application on creepage risk.

[0063] Based on the above structure, even when the spacing between adjacent electrode plates is reduced, a high-voltage electrostatic field can still be stably formed between the electrode plates, avoiding high-voltage discharge problems caused by the close proximity of conductive edges. Thus, while ensuring operational safety, the electrode plates can be arranged in a compact manner, making it suitable for electrostatic filtration applications in space-constrained ventilation systems.

[0064] See Figure 5 As shown, the top of the first conductive layer 12 is flush with the top of the first insulating substrate 11, and the first insulating substrate 11 forms a first insulating region 30 along the height direction below the first conductive layer 12.

[0065] See Figure 6 As shown, the bottom end of the second conductive layer 22 is flush with the bottom end of the second insulating substrate 21, and the second insulating substrate 21 forms a second insulating region 40 above the second conductive layer 22 along the height direction.

[0066] By setting the top end of the first conductive layer 12 to be flush with the top end of the first insulating substrate 11, the conductive layer of the high-voltage electrode sheet is mainly distributed on the upper part of the electrode sheet, while the lower part remains as a continuous insulating substrate surface; correspondingly, the bottom end of the second conductive layer 22 is set to be flush with the bottom end of the second insulating substrate 21, so that the conductive layer of the low-voltage electrode sheet is mainly distributed on the lower part of the electrode sheet, while the upper part also remains as a continuous insulating substrate surface.

[0067] With the above structural arrangement, the conductive layers of adjacent first electrode plates 10 and second electrode plates 20 form a stable vertical misalignment relationship in the height direction.

[0068] See Figure 5As shown, the misalignment distance L1 between the first conductive layer 12 and the second conductive layer 22 in the height direction can be set to 10 mm to 50 mm, preferably 30 mm. This misalignment distance simultaneously constitutes the effective dimensions of the first insulating region 30 and the second insulating region 40 in the height direction, so that the adjacent electrode sheets form a continuous isolation area through the surface of the insulating substrate. This allows the possible discharge or creepage path to extend along the insulating surface, increasing the insulation travel and helping to reduce the possibility of discharge.

[0069] See Figure 1 , Figure 4 as well as Figure 8 As shown, the first conductive layer 12 is centrally disposed on the first insulating substrate 11 along a third direction, and the first insulating substrate 11 forms third insulating regions 50 on both sides of the first conductive layer 12 along the third direction. The second conductive layer 22 is centrally disposed on the second insulating substrate 21 along a third direction, and the second insulating substrate 21 forms fourth insulating regions 60 on both sides of the second conductive layer 22 along the third direction. Here, the third direction is defined as the width direction of the electrode sheet.

[0070] Since the first conductive layer 12 and the second conductive layer 22 are both located in the middle of the corresponding insulating substrate in the width direction, the adjacent first electrode sheet 10 and second electrode sheet 20 retain continuous insulating areas on both sides in the width direction.

[0071] See Figure 6 As shown, the third insulating region 50 and the fourth insulating region 60 can have the same dimension L2 in the width direction, which can be set to 5mm to 20mm respectively, preferably 10mm, so as to form a symmetrically distributed insulating isolation band in the width direction of the electrode sheet.

[0072] See Figure 8 , Figure 8 This is a schematic diagram of the creepage gap between adjacent first electrode piece 10 and second electrode piece 20 in the width direction, shown as a top projection view. Figure 8 This figure is used to illustrate the creepage gap formed by the first conductive layer 12 and the second conductive layer 22 in the width direction through the first insulating substrate 11 and the second insulating substrate 21. This figure is a schematic diagram and does not represent the actual structure or proportion of the electrode sheet.

[0073] like Figure 8 As shown, the first conductive layer 12 and the second conductive layer 22 are both disposed in the middle of the corresponding first insulating substrate 11 and second insulating substrate 21 along the width direction of the electrode sheet, so that the conductive layer retains continuous insulating substrate areas on both sides in the width direction.

[0074] Figure 8The dashed line 130 represents the creepage gap formed by the first insulating substrate 11 and the second insulating substrate 21 on both sides in the width direction, which is used to illustrate the creepage path that may be formed between adjacent first electrode pieces 10 and second electrode pieces 20 in the width direction.

[0075] By providing the aforementioned insulating regions on both sides of the conductive layer in the width direction, potential creepage no longer forms a direct crossing path along the edge of the conductive layer in the width direction, but instead needs to detour along the surface of the insulating substrate, thereby increasing the creepage travel length. This helps reduce the risk of creepage between adjacent electrode sheets in the width direction and further improves the electrical isolation reliability between electrode sheets.

[0076] See Figures 1 to 4 The electrostatic filter also includes a spacer structure disposed between adjacent first electrode plates 10 and second electrode plates 20. The first electrode plates 10 and second electrode plates 20 are staggered along a first direction, and the spacer structure is located between adjacent electrode plates to limit the gap between adjacent electrode plates, so that each electrode plate maintains a stable relative spacing after assembly, thereby ensuring the stability of the high-voltage electrostatic field.

[0077] The spacing structure comprises multiple spacer posts 70, which are respectively disposed between the first insulating substrate 11 of the first electrode sheet 10 and the back surface (the side without a conductive layer) of the adjacent second electrode sheet 20, and between the second insulating substrate 21 of the second electrode sheet 20 and the back surface (the side without a conductive layer) of the adjacent first electrode sheet 10. By providing multiple spacer posts 70 between adjacent electrode sheets, the adjacent electrode sheets are supported and restrained at multiple positions, thereby avoiding the problem of local deformation or uneven spacing of the electrode sheets caused by relying on only a single point or edge support.

[0078] Furthermore, multiple spacer posts 70 are respectively disposed within the third insulating region 50 of the first insulating substrate 11 and the fourth insulating region 60 of the second insulating substrate 21. Since the third insulating region 50 and the fourth insulating region 60 are located on both sides of the conductive layer width direction, the spacer posts 70 are disposed within the aforementioned insulating regions, ensuring sufficient electrical isolation between the spacer posts 70 and the conductive layer. This achieves electrode spacing support while avoiding adverse effects of the spacer posts 70 on the high-voltage electrostatic field distribution and reducing the risk of discharge or creepage near the spacer posts 70.

[0079] Furthermore, the spacer posts 70 disposed on the first electrode plate 10 and the spacer posts 70 disposed on the second electrode plate 20 are staggered in the height direction. By making the spacer posts 70 on adjacent electrode plates staggered in the height direction, the spacer posts 70 can avoid forming a continuous alignment structure in the height direction, thereby preventing the formation of a through electrical path along the direction of the spacer posts 70. This helps to further reduce the possibility of creepage between adjacent electrode plates and improve the electrical safety of the overall structure.

[0080] Furthermore, the spacer post 70 is integrally formed with the corresponding first insulating substrate 11 or second insulating substrate 21. By integrally forming the spacer post 70 with the insulating substrate, the gap between adjacent electrode sheets is directly limited by the height of the spacer post 70, structurally determining the minimum spacing between adjacent electrode sheets. This method avoids the problem of relying on assembly tolerances or external limiting components to control the electrode spacing, enabling the electrode sheets to form a stable and consistent gap structure after being staggered and assembled along the first direction, which is beneficial for maintaining long-term operational reliability under small-pitch arrangement conditions.

[0081] See Figures 1 to 3 The electrostatic filter has a first current-conducting layer on the top of the electrode assembly and a second current-conducting layer on the bottom of the electrode assembly. The first current-conducting layer is electrically connected to the first conductive layer 12 on the plurality of first electrode sheets 10, and the second current-conducting layer is electrically connected to the second conductive layer 22 on the plurality of second electrode sheets 20.

[0082] In this embodiment, multiple first electrode sheets 10 and second electrode sheets 20 are arranged alternately along a first direction to form an integral electrode assembly. By providing a busbar conductive layer at the top and bottom of the electrode assembly, the conductive layers distributed on different electrode sheets are electrically converged in the end region, thereby connecting multiple high-voltage electrode sheets and low-voltage electrode sheets to their respective power supply terminals.

[0083] Specifically, the first bus conductive layer is formed by coating the top ends of a plurality of first electrode sheets 10 with conductive paint or conductive adhesive, and the second bus conductive layer is formed by coating the bottom ends of a plurality of second electrode sheets 20 with conductive paint or conductive adhesive.

[0084] After conductive paint or conductive adhesive is applied to the ends of the electrode sheets, a continuous conductive layer can be formed in the end region of the electrode sheet assembly. This allows the conductive layers on multiple electrode sheets to achieve reliable electrical connection without adding additional conductive components, facilitating unified power supply, while not affecting the normal formation of the electrostatic field between the electrode sheets.

[0085] In addition, the first bus conductive layer is electrically connected to the first conductive contact 80 through the first wire, and the second bus conductive layer is electrically connected to the second conductive contact 90 through the second wire.

[0086] The first conductive contact 80 and the second conductive contact 90 are disposed on the outside of the electrostatic filter or on the mounting frame 100, serving as connection interfaces with the external high-voltage power supply and the low-voltage end. They are connected to the corresponding busbar conductive layers through wires, thereby realizing centralized power supply to the electrode plate assembly, which facilitates the installation, wiring and subsequent maintenance of the whole machine.

[0087] See Figures 1 to 3 The electrostatic filter also includes a mounting frame 100 and a connecting rod 110. The first electrode plate 10 and the second electrode plate 20 are both provided with mounting through holes. The connecting rod 110 passes through the mounting through holes of the multiple electrode plates along the first direction and is connected to the mounting frame 100.

[0088] Multiple first electrode plates 10 and second electrode plates 20 are arranged alternately along a first direction. A connecting rod 110 passes through the mounting holes on each electrode plate sequentially, forming an integral arrangement of the electrode plates in the first direction. The mounting frame 100 then secures the arrangement. This connection method ensures stable relative positions of the electrode plates while facilitating the overall assembly, disassembly, and maintenance of the electrode assembly.

[0089] After being assembled from the mounting frame 100 and the connecting rod 110, a through-hole structure for air passage is formed between adjacent first electrode plates 10 and second electrode plates 20, and multiple such structures are arranged along a first direction.

[0090] Because adjacent electrode plates maintain a predetermined distance in the first direction, a continuous air channel is formed between adjacent first electrode plates 10 and second electrode plates 20. When dusty air passes through the microporous structure, the particulate matter in the air is ionized under the action of a high-voltage electrostatic field and migrates to the surface of the electrode plates, thereby achieving effective capture of particulate matter.

[0091] See Figures 1 to 2 Multiple first electrode sheets 10 and second electrode sheets 20 are alternately arranged and fixed to form an integral electrode sheet assembly. The electrode sheet assembly is installed within a mounting frame 100, which includes a top frame 101, a bottom frame 102, and a side frame 103. The mounting frame 100 includes a top frame 101, a bottom frame 102, and a side frame 103. The top frame 101 and the bottom frame 102 are respectively provided with potting grooves 104, and the side frame 103 is provided with a potting opening 105 communicating with the potting grooves 104. The potting opening 105 is used to pour insulating potting compound into the potting grooves 104, and the potting grooves 104 are provided with an insulating potting structure formed by the insulating potting compound. The insulating potting compound can be a two-component epoxy resin adhesive.

[0092] After the electrode assembly is assembled and fixed to the mounting frame 100, insulating potting compound is injected into the corresponding potting groove 104 through the potting opening 105 on the side frame 103. Since the potting process is carried out by an external potting device, the potting compound is under pressure during injection and can enter the potting groove 104 through the potting opening 105 under the pressure of the injection, forming a continuous potting structure in the potting groove 104.

[0093] By providing potting grooves 104 in the top frame 101 and bottom frame 102 respectively, the end area of ​​the electrode assembly is covered by an insulating potting structure after potting, thereby forming a stable insulating isolation area at the end of the electrode, effectively reducing the risk of creepage or discharge at the end position.

[0094] See Figures 9 to 10 The inner wall of the glue-filling opening 105 is provided with a flow-guiding slope 106, which extends inclinedly toward the glue-filling groove 104 in a direction away from the glue-filling opening 105.

[0095] During the potting process, the insulating potting compound, under the pressure of the external potting device, enters the mounting frame 100 through the potting opening 105 and flows towards the potting groove 104 under the guidance of the guide slope 106. By setting the guide slope 106, the flow resistance of the potting compound near the potting opening 105 can be reduced, making it easier for the potting compound to enter the potting groove 104 and complete the filling.

[0096] See Figures 1 to 2 The gap between adjacent first electrode plates 10 and second electrode plates 20 is set to 1 mm to 1.5 mm. This gap is defined and maintained by the aforementioned spacing structure, so that adjacent electrode plates can maintain a stable and consistent spacing during the overall arrangement process.

[0097] By controlling the electrode gap within the aforementioned range, on the one hand, the electrode arrangement density can be increased under the limited space of the rectangular air duct, thereby increasing the effective electrode area participating in electrostatic interaction per unit volume; on the other hand, combined with the aforementioned structural design of single-sided conductive layer and staggered arrangement in the height direction, a stable electrical isolation state can still be maintained even under small spacing conditions, avoiding the occurrence of high-voltage discharge. Furthermore, the gap between adjacent first electrode 10 and second electrode 20 is set to 1mm to 1.5mm, which is smaller than the electrode gap of more than 2mm in conventional technologies, resulting in higher filtration efficiency.

[0098] See Figures 1 to 3The thickness of both the first insulating substrate 11 and the second insulating substrate 21 is set to 0.1 mm to 0.3 mm. By controlling the thickness of the insulating substrate within the above range, the overall structural strength and insulation performance of the electrode sheet can be guaranteed while also considering the flexibility and processing feasibility of the electrode sheet, making it suitable for mass production and assembly of electrode sheets. In a preferred embodiment, the thickness of both the first insulating substrate 11 and the second insulating substrate 21 is 0.3 mm, while in the prior art, the thickness is mostly 0.5 mm or more.

[0099] The thickness of the first conductive layer 12 and the second conductive layer 22 is set to 0.1 mm to 0.3 mm. Within this thickness range, the conductive layers have good conductivity and structural stability, and can maintain a continuous and reliable conductive state under high-voltage electrostatic field conditions, avoiding problems such as increased resistance or local failure caused by excessively thin conductive layers. In a preferred embodiment, the thickness of both the first conductive layer 12 and the second conductive layer 22 is 0.1 mm.

[0100] By combining and setting the thickness of the insulating substrate and the conductive layer within the above-mentioned range and preferred values, a good balance is achieved between the structural strength, insulation performance and conductivity of the electrode sheet, which is beneficial for the stable and long-term operation of the electrostatic filter under high-voltage conditions. Example 2:

[0101] See Figures 1 to 10 As shown, this embodiment 2 provides an air purification device, which includes a rectangular air duct, an air supply device, and an electrostatic filter disposed in the rectangular air duct.

[0102] The rectangular air duct forms an airflow channel, and its cross-sectional shape is rectangular. The electrostatic filter is disposed inside the rectangular air duct and located in the airflow path, so that air can pass through the electrostatic filter when passing through the rectangular air duct.

[0103] The air supply device is located at one end of the rectangular air duct or at a position connected to the rectangular air duct, and is used to drive air to flow along the direction of the rectangular air duct, so that the air passes through the electrostatic filter in sequence.

[0104] The electrostatic filter described in Embodiment 1 includes multiple electrode plates arranged parallel to each other along a first direction, forming a high-voltage electrostatic field between adjacent electrode plates to adsorb charged particles in the air. By arranging this electrostatic filter inside a rectangular air duct and driving it with an air supply device, electrostatic filtration of the air passing through the air duct can be achieved without changing the external dimensions of the air duct.

[0105] During the operation of the air purification equipment, after the air supply device is activated, the dust-laden air flows along the rectangular air duct under the action of the air supply device and enters the area where the electrostatic filter is located. The particulate matter in the air is charged under the action of the high-voltage electrostatic field and migrates towards the surface of the electrode plates, thereby being captured and removed. The air treated by the electrostatic filter continues to be output along the rectangular air duct, realizing the air purification function.

[0106] The above structural design allows the electrostatic filter to form an integrated air purification device structure with the rectangular air duct in conjunction with the air supply device. This facilitates full utilization of the effective cross-sectional area of ​​the rectangular air duct and improves air purification efficiency. Example 3:

[0107] See Figures 1 to 10 As shown, this embodiment 3 provides a ventilation system, including an electrostatic filter, a rectangular air duct, and an air supply device.

[0108] The rectangular air duct forms an airflow channel, and its cross-sectional shape is rectangular. The electrostatic filter is disposed inside the rectangular air duct and located in the airflow path, so that air can pass through the electrostatic filter when passing through the rectangular air duct.

[0109] The electrostatic filter described in Embodiment 1 includes multiple electrode plates arranged parallel to each other along a first direction, forming a high-voltage electrostatic field between adjacent electrode plates to adsorb charged particles in the air. By arranging this electrostatic filter inside a rectangular air duct, electrostatic filtration of the air passing through the duct can be achieved without changing the external dimensions of the duct.

[0110] The air supply device is used to generate airflow and drive air to flow within the ventilation system. It can be a fan, blower, or other device with air supply function. The air supply device is configured in conjunction with the air purification equipment, so that the air flows along the rectangular air duct in the air purification equipment under the drive of the air supply device, and passes through the electrostatic filter set in the rectangular air duct in sequence.

[0111] During the operation of the ventilation system, after the air supply device is activated, outside air or air to be treated is introduced into the rectangular air duct and propelled by the airflow through the electrostatic filter. Particulate matter in the air is effectively captured by the high-voltage electrostatic field within the filter, thus purifying the air. The purified air is then continuously transported to the downstream area of ​​the ventilation system by the air supply device for indoor air supply, ventilation, or other ventilation needs.

[0112] By integrating the aforementioned electrostatic filter into the ventilation system, the system can achieve both air delivery and air purification capabilities, effectively improving the cleanliness of the ventilated air. This is especially suitable for ventilation applications with rectangular duct structures.

[0113] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An electrostatic filter, characterized by: The electrode sheet includes a first electrode sheet and a second electrode sheet, the first electrode sheet and the second electrode sheet are alternately arranged along the first direction, the first electrode sheet and the second electrode sheet are high-voltage electrode sheet and low-voltage electrode sheet respectively, and a high-voltage electrostatic field is formed between adjacent first electrode sheet and second electrode sheet. The first electrode sheet includes a first insulating substrate and a first conductive layer arranged on one side of the first insulating substrate, and the second electrode sheet includes a second insulating substrate and a second conductive layer arranged on one side of the second insulating substrate. The first conductive layer and the second conductive layer are arranged on the same side surface of the corresponding insulating substrate, and the first conductive layer and the second conductive layer are arranged in a staggered manner in the height direction. The top end of the first conductive layer is flush with the top end of the first insulating substrate, and the first insulating substrate forms a first insulating area below the first conductive layer in the height direction; the bottom end of the second conductive layer is flush with the bottom end of the second insulating substrate, and the second insulating substrate forms a second insulating area above the second conductive layer in the height direction. The first conductive layer is arranged centrally on the first insulating substrate along the third direction, and the first insulating substrate forms a third insulating area on both sides of the first conductive layer along the third direction.

2. The electrostatic filter of claim 1, wherein: The second conductive layer is arranged centrally on the second insulating substrate along the third direction, and the second insulating substrate forms a fourth insulating area on both sides of the second conductive layer along the third direction. The third direction is defined as the width direction of the electrode sheet, and the first direction, the second direction and the third direction are perpendicular to each other. The spacer structure is arranged between the first electrode sheet and the second electrode sheet, and is used to maintain a predetermined distance between the first electrode sheet and the second electrode sheet.

3. The electrostatic filter of claim 1, wherein: The spacer structure is a plurality of spacer columns, and the plurality of spacer columns are arranged between the first insulating substrate of the first electrode sheet and the adjacent second electrode sheet, and between the second insulating substrate of the second electrode sheet and the adjacent first electrode sheet.

4. The electrostatic filter of claim 3, wherein: The plurality of spacer columns are arranged in the third insulating area of the first insulating substrate and the fourth insulating area of the second insulating substrate respectively.

5. The electrostatic filter of claim 4, wherein: The spacer columns arranged on the first electrode sheet and the spacer columns arranged on the second electrode sheet are arranged in a staggered manner in the height direction.

6. The electrostatic filter of claim 4, wherein: The spacer column and the corresponding first insulating substrate or second insulating substrate are integrally formed.

7. The electrostatic filter of claim 4, wherein: The electrostatic filter is provided with a first bus conductive layer at the top and a second bus conductive layer at the bottom; the first bus conductive layer is electrically connected with the plurality of first conductive layers, and the second bus conductive layer is electrically connected with the plurality of second conductive layers.

8. The electrostatic filter of claim 1, wherein: ​ 9. The electrostatic filter of claim 8, wherein: The first bus conductive layer is formed by applying conductive paint or conductive glue on the top end of the plurality of first electrode pieces; and the second bus conductive layer is formed by applying conductive paint or conductive glue on the bottom end of the plurality of second electrode pieces.

10. The electrostatic filter of claim 9, wherein: The first bus conductive layer is electrically connected to the first conductive contact piece by a first wire, and the second bus conductive layer is electrically connected to the second conductive contact piece by a second wire.

11. The electrostatic filter of claim 1, wherein: The connecting rod is arranged in the mounting through holes of the plurality of electrode pieces in the first direction and connected to the mounting frame.

12. The electrostatic filter of claim 11, wherein: The first electrode piece and the second electrode piece are arranged in the first direction.

13. The electrostatic filter of claim 11, wherein: The mounting frame includes a top frame body, a bottom frame body, and a side frame body, the top frame body and the bottom frame body are respectively provided with a glue filling groove, and the side frame body is provided with a glue filling opening in communication with the glue filling groove.

14. The electrostatic filter of claim 13, wherein: The inner side wall of the glue filling opening is provided with a flow guide slope surface that extends obliquely away from the glue filling opening and towards the glue filling groove, so as to guide the flowing of the injected insulation potting glue into the glue filling groove.

15. The electrostatic filter of claim 1, wherein: The first conductive layer and the second conductive layer are respectively metal aluminum foils, and the first conductive layer and the second conductive layer are respectively connected to the first insulation substrate and the second insulation substrate by adhesive bonding.

16. The electrostatic filter of claim 1, wherein: The gap between the adjacent first electrode piece and the second electrode piece is 1mm-1.5mm.

17. The electrostatic filter of claim 1, wherein: The thickness of the first insulation substrate and the second insulation substrate is 0.1mm-0.3mm, and the thickness of the first conductive layer and the second conductive layer is 0.1mm-0.3mm.

18. An air purification apparatus or ventilation system, characterised in that: The electrostatic filter includes a rectangular air duct and an electrostatic filter arranged in the rectangular air duct, and the electrostatic filter is any one of the electrostatic filters in claims 1-17.

Images