Electrostatic dust collecting device and air purification equipment

Abstract

The present invention relates to an electrostatic dust collecting device and air purification equipment, comprising: a first electrode sheet and a second electrode sheet in the shape of strips, a plurality of first supporting bosses are respectively arranged on both sides of the first surface of the first electrode sheet, a plurality of second supporting bosses are respectively arranged on both sides of the first surface of the second electrode sheet, and the second surface of the first electrode sheet is contacted and stacked on the second supporting bosses of the second electrode sheet and then wound to form the electrostatic dust collecting device. The electrostatic dust collecting device of the present invention does not need to use a specific tooling to maintain a fixed gap during winding and can accurately maintain a fixed spacing. After winding and forming, a layer support structure can be formed to solve the problem that the spacing between two electrostatic dust collecting sheets after spiral winding is difficult to ensure. Moreover, after winding, it can be assembled into a finished product without the need for subsequent process treatments such as dispensing glue and inserting an isolation comb.

Description

Technical Field

[0001] The present invention relates to the technical field of electrostatic dust collection, in particular to an electrostatic dust collection device and air purification equipment. Background Art

[0002] The electrostatic dust collection technology module is generally divided into two parts:

[0003] <1> Corona device for ionizing air: The process of making the air charged by high voltage ionization is called generating electrode, ionizing electrode, corona device, etc.

[0004] <2> Dust collecting device for collecting particulate matter in the air: through the action of electric field force, the moving charged particles are deposited on the electrode plate, which is called the collecting electrode or dust collecting electrode.

[0005] Dust collectors made of metal plates (or conductive plates) have been developed quite maturely, but their application is limited by the following drawbacks:

[0006] ① Due to discharge and sparking, the distance between the exposed metal plates is too large, and a very high voltage cannot be applied, which makes it difficult to improve the primary filtration efficiency of the dust collector.

[0007] ② The collector module composed of rectangular metal plates is often in the shape of a cuboid. When matched with a circular fan or air duct section, it often wastes the effective area outside the square inscribed in the circle, and it is difficult to apply to industrial design models with a cylindrical appearance.

[0008] Therefore, some technicians studied the disc-shaped collector other than the rectangular collector. The basic principle is as follows:

[0009] The disc-shaped collecting electrode dust filter is composed of two electrodes that are not in contact with each other. There is a gap air duct between the electrodes. Different voltages are applied to the two electrodes to form an electric field between the two electrodes that is sufficient to adsorb charged ions. Under the action of the electric field force, dust with different polarities moves to electrodes of different polarities and is deposited on the electrodes, thereby achieving the purpose of separating dust and gas.

[0010] In principle, the disc-shaped collector has three advantages:

[0011] ① The distance between the plates can be very small because the conductive layers of the two electrodes are isolated by a winding substrate of a certain thickness. Even if a very high voltage (usually 3~10K) is applied, no discharge or sparking will occur, and the dust collection efficiency is very high.

[0012] ② The disc-wound electrode can be wound into disc electrodes of different diameters and thicknesses as required by selecting the length and width of the electrode winding substrate according to the requirements of the air duct. It is simple to operate and inexpensive.

[0013] ③ The disc-shaped collector can be perfectly matched with the circular air duct. In the past, when the rectangular collector was matched with the circular fan duct, it was necessary to connect it through a "circle to square" collector. Even so, the wind speed, static pressure, flow field, etc. between the various plates of the rectangular collector were different, resulting in inconsistent purification efficiency.

[0014] However, despite the above advantages of the disc-shaped collecting electrode, it is still not widely used. The inventors have found in long-term tests that the core issue affecting the dust collection efficiency and assembly process is how to ensure uniform and equal spacing between the winding layers. Only with uniform and equal spacing can a balanced and stable working electric field be formed.

[0015] Without affecting the electric field strength, the thickness of the winding layer substrate is very thin (usually 0.1~0.5mm). After layers of winding and extrusion, the spacing between the two electrodes is difficult to ensure, and squeezing, stacking and other scenes often occur. For this reason, there are three conventional methods:

[0016] ① Melt glue: such as Figure 1 As shown, after two adjacent electrostatic dust collecting sheets are spirally wound using a specific tool, a proper amount of hot melt adhesive 100 is added from the side while maintaining the distance between them. After the hot melt adhesive 100 is cooled and solidified, it can play a role in fixing the distance between the electrostatic dust collecting sheets.

[0017] shortcoming: <1> The specific tooling for maintaining spacing is complex in structure and has a high failure rate during winding;

[0018] <2> The long cooling time of dispensing is not conducive to improving production efficiency.

[0019] <3> When the dust collecting electrode is cleaned, there are temperature requirements for the glue dispensing position, and the glue dispensing position is easily damaged.

[0020] <4> Because the number of glue strips is limited, in places where glue is not applied, because the dust collecting sheet is suspended for a long time and the thickness of the dust collecting sheet is relatively thin, when the dust collecting sheet is deformed by external forces such as squeezing and collision, the dust collecting spacing will no longer be guaranteed, and there is a risk of short circuit due to the two sheets being close together.

[0021] ② Spacer: Figure 2 As shown, before two adjacent electrostatic dust collecting sheets are prepared to be wound, a spacer sheet 200 of a certain thickness is first pasted on one of the winding substrates. The spacer sheet 200 is pasted on the substrate at a certain distance. During the winding process, the spacer sheet 200 plays a role in fixing the electrostatic dust collecting distance. There is also the effect of directly inserting the spacer sheet 200 into the gap of the winding belt during the winding process to form a fixed distance.

[0022] shortcoming: <1> There are thousands of spacers 200 needed to wrap a circular collector, and it is complicated whether it is pasted or inserted;

[0023] <2> The sticking or insertion of the spacer 200 covers a portion of the space of the dust collecting electric field. Due to the large number of the spacers 200, the dust collection efficiency sacrificed by the collecting electrode also increases.

[0024] ③Isolation comb: Figure 3 As shown, the first electrostatic dust collecting sheet and the second electrostatic dust collecting sheet are wound into a double helix linear structure with uniform spacing using a tool, and a comb-toothed support plate 300 as shown in the figure is inserted into the formed double helix linear structure, and a plurality of comb teeth are arranged at equal intervals on the comb-toothed support plate 300.

[0025] shortcoming: <1> The specific tooling for maintaining spacing is complex in structure and has a high failure rate during winding;

[0026] <2> The slot width of the comb-shaped support plate 300 is affected by mold processing and strength life. The slot width (>1mm) is much larger than the thickness of the winding substrate, resulting in a gap between the substrate and the slot, which is not conducive to ensuring a fixed spacing.

[0027] <3> The precise insertion of the comb-shaped support plate 300 into the wound double helix wire substrate is itself demanding.

[0028] <4> Because the number of isolation combs is limited, and the dust collecting sheets are suspended for a long time at the place where the isolation combs are inserted, and because the thickness of the dust collecting sheets is relatively thin, when the dust collecting sheets are deformed by external forces such as squeezing and collision, the dust collecting spacing will no longer be guaranteed, and there is a risk of short circuit due to the two sheets being close together.

[0029] From the above analysis, it can be seen that the disc-shaped electrostatic dust collecting sheets in the prior art cannot effectively solve the problem of maintaining a distance between two electrostatic dust collecting sheets after they are spirally wound. Summary of the invention

[0030] To this end, the technical problem to be solved by the present invention is to overcome the problem in the prior art that the disc-shaped electrostatic dust collecting sheets cannot effectively solve the problem of maintaining the spacing between two electrostatic dust collecting sheets after spiral winding and forming, and to provide an electrostatic dust collecting device and air purification equipment. During the winding and forming, there is no need to use specific tooling to maintain a fixed gap, and the fixed spacing can be accurately maintained. After the winding and forming, a layer support structure can be formed, which solves the problem of the difficulty in ensuring the spacing between two electrostatic dust collecting sheets after spiral winding and forming. Moreover, after the winding is completed, they can be assembled into a finished product without the need for subsequent process treatments such as gluing and inserting isolation combs.

[0031] In order to solve the above technical problems, the present invention provides an electrostatic dust collection device, including: a first electrode sheet and a second electrode sheet respectively in the shape of strips, a first surface of the first electrode sheet is provided with a plurality of first supporting bosses on both sides, a first surface of the second electrode sheet is provided with a plurality of second supporting bosses on both sides, the second surface of the first electrode sheet is contacted and stacked on the second supporting bosses of the second electrode sheet and then wound to form the electrostatic dust collection device.

[0032] In one embodiment of the present invention, the first electrode sheet comprises: a first substrate and a first conductive layer disposed on one side of the first substrate, a plurality of first supporting bosses disposed on both sides of the first conductive layer, and the plurality of first supporting bosses are at the same distance from the first conductive layer;

[0033] The second electrode sheet includes: a second substrate and a second conductive layer disposed on one side of the second substrate, a plurality of second supporting bosses are disposed on both sides of the second conductive layer, and the plurality of second supporting bosses are at the same distance from the second conductive layer.

[0034] In one embodiment of the present invention, the first supporting protrusion is extended along the lateral direction of the first electrode sheet, the width of the first supporting protrusion close to the first conductive layer is smaller than the width of the first supporting protrusion away from the first conductive layer, and the first supporting protrusion away from the first conductive layer is configured in an arc shape;

[0035] The second supporting boss is extended along the lateral direction of the second electrode sheet, the width of the second supporting boss close to the second conductive layer is smaller than the width of the second supporting boss away from the second conductive layer, and the second supporting boss away from the second conductive layer is set in an arc shape.

[0036] In one embodiment of the present invention, the first supporting boss is integrally formed with the first substrate;

[0037] The second supporting boss is integrally formed with the second substrate.

[0038] In one embodiment of the present invention, after the first electrode sheet and the second electrode sheet are wound and formed, the first supporting bosses and the second supporting bosses on the first electrode sheet and the second electrode sheet in adjacent layers are staggered with each other.

[0039] In one embodiment of the present invention, the two first supporting bosses along the lateral extension direction of the first electrode sheet do not overlap with the two second supporting bosses along the lateral extension direction of the second electrode sheet.

[0040] In one embodiment of the present invention, the first supporting boss and the second supporting boss are both prepared by hot pressing or adsorption process, the first supporting boss forms a groove on one side of the first substrate, and the second supporting boss forms a groove on one side of the second substrate, and the first supporting boss and the second supporting boss both have a supporting surface and an annular supporting side wall surrounding the supporting surface, and the annular supporting side wall is an inclined surface.

[0041] In one embodiment of the present invention, the first supporting boss and the second supporting boss are both made of a hydrophobic material.

[0042] In one embodiment of the present invention, a safety gap is reserved between the first supporting boss and the first conductive layer;

[0043] A safety gap is reserved between the second supporting boss and the second conductive layer;

[0044] The safety gap is greater than 1 mm.

[0045] In one embodiment of the present invention, the first supporting boss and the second supporting boss are independent parts, and are respectively attached to the first substrate and the second substrate.

[0046] In one embodiment of the present invention, the distance P1 between two adjacent first supporting bosses on the same side and the thickness T1 of the first substrate satisfy the following relationship:

[0047] P1<35T1;

[0048] The distance P2 between two adjacent second supporting bosses on the same side and the thickness T2 of the second substrate satisfy the following relationship:

[0049] P2<35T2.

[0050] In one embodiment of the present invention, the first conductive layer and the second conductive layer are respectively a collector conductive layer and a repeller conductive layer, and the width of the collector conductive layer is greater than the width of the repeller conductive layer.

[0051] In one embodiment of the present invention, the present invention further comprises: a support having a central axis, the first electrode sheet and the second electrode sheet being spirally wound around the central axis.

[0052] In order to solve the above technical problems, the present invention also provides an air purification device, including the electrostatic dust collection device.

[0053] The above technical solution of the present invention has the following advantages compared with the prior art:

[0054] The electrostatic dust collecting device described in the present invention is provided with a first supporting boss and a second supporting boss on the first electrode sheet and the second electrode sheet respectively. After the two electrode sheets are spirally wound and formed, the layered support of the multi-layer electrode sheets is realized by the first supporting boss and the second supporting boss. During the winding and forming, no specific tooling for maintaining a fixed gap is required, and the fixed spacing can be accurately maintained. After the winding and forming, the first supporting boss and the second supporting boss can form a layered support structure, which solves the problem that the spacing between the two electrostatic dust collecting sheets after spiral winding and forming is difficult to ensure. Compared with the prior art, the finished product can be assembled after the winding is completed, and no subsequent process treatments such as dispensing glue and inserting an isolation comb are required.

[0055] Moreover, the first supporting boss and the second supporting boss in the present invention are respectively arranged on both sides of the first electrode sheet and the second electrode sheet, and the first supporting boss and the second supporting boss are spaced apart along the width direction of the first electrode sheet and the second electrode sheet, avoiding the conductive film or conductive coating on the substrate, and not covering the space of the dust collecting electric field. Therefore, the dust collection efficiency of the collecting electrode is not sacrificed, and the dust collection efficiency is further improved compared with the electrostatic dust collection device in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein:

[0057] Figure 1 It is a schematic diagram of the structure of using hot melt adhesive to fix the electrostatic dust collecting sheet in the prior art;

[0058] Figure 2 It is a schematic diagram of the structure of using spacers to separate electrostatic dust collecting sheets in the prior art;

[0059] Figure 3 It is a schematic diagram of the structure of the electrostatic dust collecting sheet separated by comb teeth in the prior art;

[0060] Figure 4 It is a schematic diagram of the side structure of the electrode sheet of the electrostatic dust collector of the present invention before being wound;

[0061] Figure 5 is a schematic diagram of the top view of the structure of the electrode sheet of the electrostatic dust collector of the present invention before being wound;

[0062] Figure 6 It is a schematic diagram of the side structure and a partially enlarged schematic diagram of the structure of the electrode sheet of the electrostatic dust collector of the present invention after winding and forming;

[0063] Figure 7 is a schematic diagram of a top view of the structure of a first electrode sheet of the present invention;

[0064] Figure 8is a schematic structural diagram of the distance between two first supporting bosses on the first electrode sheet of the present invention;

[0065] Fig. 9 It is a schematic structural diagram of a first supporting boss integrally formed on a first substrate of the present invention;

[0066] Fig.10 It is a schematic structural diagram of the first supporting boss of the present invention being broken with the first conductive layer during forming;

[0067] Fig.11 is a schematic side view of the structure of the first electrode sheet of the present invention;

[0068] Fig.12 It is a schematic diagram of the structure of the electrode sheet of the present invention wound on the bracket.

[0069] Description of the accompanying drawings: 1. first electrode sheet; 11. first substrate; 12. first conductive layer; 2. second electrode sheet; 21. second substrate; 22. second conductive layer; 3. first supporting boss; 4. second supporting boss; 5. groove; 6. shortest discharge path; 7. bracket;

[0070] 100, hot melt adhesive; 200, spacer; 300, comb-shaped support plate. DETAILED DESCRIPTION

[0071] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0072] Reference Figures 4 to 6 As shown, the present invention discloses an electrostatic dust collecting device, comprising: a first electrode sheet 1 and a second electrode sheet 2, which are respectively in the form of strips, a plurality of first supporting bosses 3 are respectively arranged on both sides of the first surface of the first electrode sheet 1, a plurality of second supporting bosses 4 are respectively arranged on both sides of the first surface of the second electrode sheet 2, and the second surface of the first electrode sheet 1 is contacted and stacked on the second supporting bosses 4 of the second electrode sheet 2 and then wound to form the electrostatic dust collecting device.

[0073] As mentioned above, disc-shaped electrostatic dust collectors have many advantages over plate-shaped electrostatic dust collectors. Therefore, disc-shaped electrostatic dust collectors have become a key research and development direction in the fields of dust removal and air purification. However, the three disc-shaped electrostatic dust collectors in the prior art all have certain defects. The inventors of the present application designed the above-mentioned electrostatic dust collectors to address these defects, and analyzed the beneficial effects of the electrostatic dust collectors of the present invention based on the defects.

[0074] First, in the process of winding, in order to ensure that the two electrostatic dust collecting sheets are separated, it is necessary to use specific tooling to maintain the spacing between the two electrostatic dust collecting sheets, which is very troublesome during winding and can easily cause winding failure. After winding, in order to maintain the position of the two electrostatic dust collecting sheets, hot melt adhesive technology or comb teeth spacing device is also required;

[0075] In order to solve this problem, before winding, the present invention has a plurality of first supporting bosses 3 and a second supporting boss 4 on one side of the first electrode sheet 1 and the second electrode sheet 2, and the plurality of first supporting bosses 3 and the second supporting bosses 4 are arranged at intervals along the longitudinal extension direction of the first electrode sheet 1 and the second electrode sheet 2, so that during winding, the first supporting bosses 3 and the second supporting bosses 4 naturally form a partition structure, and after winding, a certain distance can be maintained between the first electrode sheet 1 and the second electrode sheet 2, so that there is no need to use specific tooling for winding, which can improve the success rate of winding, and the first supporting bosses 3 and the second supporting bosses 4 can continuously support the separation of the first electrode sheet 1 and the second electrode sheet 2, and they can be assembled into a finished product after winding is completed, without the need for subsequent process treatments such as dispensing and inserting an isolation comb.

[0076] Second, in the prior art, a spacer is supported and arranged between two dust collecting sheets. For example, in the Korean patent application with publication number KR20180009236A and invention name: vortex electrostatic precipitator and air conditioner with the vortex electrostatic precipitator, a spacer structure is arranged. However, in actual use, such a spacer will cover the conductive layer of the dust collecting sheet. If the number of spacers arranged is small, the supporting effect will be affected. If a large number of spacers are arranged to ensure the supporting strength, a large number of spacers covering the conductive layer will seriously affect the adsorption effect of the electrostatic integration device.

[0077] In order to solve this problem, the present invention does not adopt a continuous spacing structure, but a convex structure, and the first supporting boss 3 and the second supporting boss 4 are spaced apart along the width direction of the first electrode sheet 1 and the second electrode sheet 2. In this embodiment, the electrode sheet is composed of a substrate and a conductive layer, and the conductive layer is covered on the substrate, that is:

[0078] The first electrode sheet 1 comprises: a first substrate 11 and a first conductive layer 12 disposed on one side of the first substrate 11; the second electrode sheet 2 comprises: a second substrate 21 and a second conductive layer 22 disposed on one side of the second substrate 21;

[0079] Specifically, multiple first support bosses 3 are arranged on both sides of the first conductive layer 12, and the distance between the multiple first support bosses 3 and the first conductive layer 12 is the same; multiple second support bosses 4 are arranged on both sides of the second conductive layer 22, and the distance between the multiple second support bosses 4 and the second conductive layer 22 is the same.

[0080] The discontinuous support structure of the present invention avoids the conductive film or conductive coating on the substrate and does not cover the space of the dust collecting electric field. Therefore, the dust collection efficiency of the collecting electrode is not sacrificed. Compared with the electrostatic dust collection device in the prior art, the dust collection efficiency is further improved.

[0081] Specifically, the substrate is made of insulating material, and the substrate can isolate the two conductive layers to ensure that no discharge sparks occur between the two conductive layers. The conductive layer can be made of a conductive film (such as aluminum foil, copper foil, conductive fiber cloth and other conductive films), or it can be completed by printing conductive ink on the substrate.

[0082] When the first conductive layer 12 and the second conductive layer 22 are actually set, one of them is set as a collecting electrode conductive layer and the other is set as a repelling electrode conductive layer. In order to improve the dust collection effect, generally, the width D1 of the collecting electrode conductive layer is set to be larger than the width D2 of the repelling electrode conductive layer.

[0083] Specifically, because the first supporting boss 3 and the second supporting boss 4 are both arranged in the gap between the electrode sheets, in actual use, the gap between the electrode sheets allows airflow to pass through. Therefore, when setting the first supporting boss 3 and the second supporting boss 4, the problem of wind resistance also needs to be considered. Figure 7 As shown, taking the first supporting boss 3 arranged on the first electrode sheet 1 as an example, the structure of the first supporting boss 3 is limited. According to the principle of aerodynamics, in this embodiment, the first supporting boss 3 is extended along the lateral direction of the first electrode sheet 1, and the width d2 of the first supporting boss 3 close to the first conductive layer 12 is smaller than the width d1 of the first supporting boss 3 away from the first conductive layer 12, and the first supporting boss 3 is arranged to be arranged in an arc shape away from the first conductive layer 12. When the airflow blows over the first supporting boss 3, a certain windward angle is formed due to the arc-shaped structure, which conforms to the principle of aerodynamics and plays a role in reducing air resistance. Moreover, when the airflow blows over the side of the first supporting boss 3, an inward angle is formed, which is conducive to the convergence of the airflow on the first conductive layer 12 after flowing through the first supporting boss 3, and the airflow will not be dispersed to avoid the first conductive layer 12, thereby ensuring the dust collection efficiency.

[0084] Similarly, when the second supporting boss 4 is set on the second electrode sheet 2, the second supporting boss 4 is extended along the lateral direction of the second electrode sheet 2, and the width of the second supporting boss 4 close to the second conductive layer 22 is smaller than the width of the second supporting boss 4 away from the second conductive layer 22, and the second supporting boss 4 away from the second conductive layer 22 is set to be an arc shape.

[0085] Specifically, the distance between two adjacent support bosses in the longitudinal direction determines the support effect between the two electrode sheets. In the actual design process, in order to improve the dust collection efficiency and reduce the resistance of air flow, it is necessary to set the distance between the two support bosses as large as possible while ensuring that the two motor sheets can be supported and separated. In order to achieve this effect, refer to Figure 8 As shown, taking the two first supporting bosses 3 on the first electrode sheet 1 supporting the second electrode sheet 2 as an example, the spacing between two adjacent first supporting bosses 3 is analyzed. The two first supporting bosses 3 on the first electrode sheet 1 and the second substrate 21 form a "simply supported beam mechanical model". When the second electrode sheet 2 is wrapped around and covers the first electrode sheet 1, the second supporting boss 4 applies a pressure F to the center of the simply supported beam, causing the simply supported beam to deform, resulting in spacing failure. To meet the requirements, after experiments, the setting of the step distance P of the two first supporting bosses 3 and the thickness T of the substrate can ensure that sufficient supporting force is provided and will not cause deformation of the substrate when P < 35T is satisfied;

[0086] Therefore, in this embodiment, the interval P1 between two adjacent first supporting bosses 3 on the same side and the thickness T1 of the first substrate 11 satisfy the following relationship:

[0087] P1<35T1;

[0088] Similarly, the distance P2 between two adjacent second supporting bosses 4 on the same side and the thickness T2 of the second substrate 21 satisfy the following relationship:

[0089] P2<35T2.

[0090] As mentioned above, in the prior art, when a spacer is used to separate and support the two dust collecting sheets, the spacer needs to be pasted or inserted between the two dust collecting sheets. However, there are thousands of spacers required to wind a disc-shaped electrostatic dust collecting device, and whether it is pasted or inserted, it is relatively complicated. In the present application, if the pasting or insertion method is also used when setting the first supporting boss 3 and the second supporting boss 4, there will inevitably be a complicated process. In order to solve this problem, refer to Fig. 9As shown, in the present embodiment, the support boss is integrally formed with the substrate, that is, the first support boss 3 is integrally formed with the first substrate 11, and the second support boss 4 is integrally formed with the second substrate 21. In this way, when preparing the substrate, the support boss can be formed on the substrate, and there is no need to stick or insert the support boss during winding, which can improve the preparation efficiency of the product.

[0091] Specifically, the first substrate 11 and the second substrate 21 are thin film materials. According to the molding process, the first supporting boss 3 can be prepared by hot pressing or thermoforming of the first substrate 11. Similarly, the second supporting boss 4 can also be prepared by hot pressing or thermoforming of the second substrate 21. However, after molding, grooves 5 corresponding to the first supporting boss 3 and the second supporting boss 4 will be formed on the first substrate 11 and the second substrate 21. In order to prevent the first supporting boss 3 and the second supporting boss 4 from entering the groove 5 when winding, in this embodiment, it is necessary to control the positions of the first supporting boss 3 and the second supporting boss 4.

[0092] Reference Figure 5 As shown, in the present embodiment, the first supporting boss 3 and the second supporting boss 4 are arranged to be staggered in space, that is: after the second surface of the first electrode sheet 1 is contacted and stacked on the second supporting boss 4 of the second electrode sheet 2, the second supporting boss 4 on the second electrode sheet 2 will not be stacked into the groove 5 on the reverse side of the first supporting boss 3 of the first electrode sheet 1. Similarly, the first supporting boss 3 on the first electrode sheet 1 will not be stacked into the groove 5 on the reverse side of the second supporting boss 4 of the second electrode sheet 2. Only by ensuring that all bosses will not be stacked into the pit on the reverse side of another boss can the effect of fixing the electrostatic dust collection spacing be ensured.

[0093] In order to realize the above-mentioned spatially staggered distribution structure, on the one hand, the spacing between the first supporting bosses 3 located on both sides of the first electrode sheet 1 can be set to be different from the spacing between the second supporting bosses 4 located on both sides of the second electrode sheet 2, that is, the first supporting bosses 3 and the second supporting bosses 4 are staggered in the lateral direction; on the other hand, the positions of the first supporting bosses 3 and the second supporting bosses 4 can be set by calculation along the longitudinal extension direction of the first electrode sheet 1 and the second electrode sheet 2, so that after the first electrode sheet 1 and the second electrode sheet 2 are wound, the first supporting bosses 3 and the second supporting bosses 4 can be staggered.

[0094] Reference Figure 5 and Fig.10As shown, since the first supporting boss 3 and the second supporting boss 4 are prepared by processes such as hot pressing or vacuum forming, during the forming process of the first supporting boss 3 and the second supporting boss 4, the edges of the supporting bosses are stretched and formed. This process will shorten the distance between the supporting bosses and the conductive layer. In severe cases, the supporting bosses and the conductive layer will be broken, resulting in the shortest discharge path 6 between the conductive layers on the first electrode sheet 1 and the second electrode sheet 2. Under a high-voltage electric field, breakdown or discharge is very likely to occur. Therefore, in this embodiment, a safety gap is reserved between the first supporting boss 3 and the first conductive layer 12. Similarly, a safety gap is reserved between the second supporting boss 4 and the second conductive layer 22. Specifically, the safety gap is greater than 1 mm, that is, G1, G2>1 mm. This ensures that even if the substrate is deformed during hot pressing or vacuum forming, it will not cause a break between the supporting boss and the conductive layer.

[0095] Specifically, after the support boss and the substrate are integrally formed by hot pressing or vacuum forming, a groove 5 is formed on the substrate. In actual use, it is necessary to maintain a dry atmosphere in the groove 5 to prevent water from accumulating in the groove 5. Fig. 9 and Fig.11 As shown, taking the first supporting boss 3 as an example, the waterproof design is explained. The first supporting boss 3 has a supporting surface and an annular supporting side wall surrounding the supporting surface. The width of the supporting surface is W, and a certain angle θ is formed between the supporting surface and the annular supporting side wall. According to the actual processing technology, the size of the first supporting boss 3 is set to meet the minimum size of the molding process and mold processing, 1.5mm ≥W≥0.5mm, 10°≥θ≥1°, and the first supporting boss 3 is also made of a hydrophobic material with a high water contact angle WCA. Since the width of the supporting surface is small and the annular supporting side wall is an inclined surface, when the dust collecting device is cleaned, the residual water will pour out of the pit, and it is not easy to form a "dammed lake". After being blown by the purifier air duct system, the surface dries quickly, which greatly shortens the time required for cleaning, maintenance and drying, and improves the user experience.

[0096] Similarly, the second supporting boss 4 also has a supporting surface and an annular supporting side wall surrounding the supporting surface, the annular supporting side wall is an inclined surface, and the second supporting boss 4 also meets the above-mentioned processing dimensions and materials.

[0097] In other embodiments, in order to avoid the formation of the groove 5, the first supporting boss 3 and the second supporting boss 4 may be used as independent parts and respectively applied to the first substrate 11 and the second substrate 21, and automatic labeling may be realized by using an automatic labeling machine.

[0098] Reference Fig.12As shown, the electrostatic dust collector of the present invention further includes: a bracket 7, wherein the bracket 7 has a central axis, and the first electrode sheet 1 and the second electrode sheet 2 are spirally wound outside the central axis.

[0099] Specifically, the present invention also provides an air purification device, including the electrostatic dust collection device, and the air purification device can be applied in technical fields such as air purification and air dust removal.

[0100] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. An electrostatic dust collector, characterized in that: include: A first electrode sheet and a second electrode sheet are respectively in the form of strips, a first surface of the first electrode sheet is provided with a plurality of first supporting bosses on both sides, a first surface of the second electrode sheet is provided with a plurality of second supporting bosses on both sides, and a second surface of the first electrode sheet is contacted and stacked on the second supporting bosses of the second electrode sheet and then wound to form the electrostatic dust collector; The first electrode sheet comprises: a first substrate and a first conductive layer arranged on one side of the first substrate, a plurality of first supporting bosses are arranged on both sides of the first conductive layer, and the plurality of first supporting bosses are at the same distance from the first conductive layer; The second electrode sheet includes: a second substrate and a second conductive layer disposed on one side of the second substrate, a plurality of second supporting bosses are disposed on both sides of the second conductive layer, and the plurality of second supporting bosses are at the same distance from the second conductive layer.

2. The electrostatic dust collector according to claim 1, characterized in that: The first supporting protrusion is extended along the lateral direction of the first electrode sheet, the width of the first supporting protrusion close to the first conductive layer is smaller than the width of the first supporting protrusion away from the first conductive layer, and the first supporting protrusion away from the first conductive layer is arranged in an arc shape; The second supporting boss is extended along the lateral direction of the second electrode sheet, the width of the second supporting boss close to the second conductive layer is smaller than the width of the second supporting boss away from the second conductive layer, and the second supporting boss away from the second conductive layer is set in an arc shape.

3. The electrostatic dust collector according to claim 1, characterized in that: The first supporting boss is integrally formed with the first substrate; The second supporting boss is integrally formed with the second substrate.

4. The electrostatic dust collector according to claim 3, characterized in that: After the first electrode sheet and the second electrode sheet are wound and formed, the first supporting bosses and the second supporting bosses on the first electrode sheet and the second electrode sheet in adjacent layers are staggered with each other.

5. The electrostatic dust collector according to claim 4, characterized in that: The two first supporting bosses along the lateral extension direction of the first electrode sheet do not overlap with the two second supporting bosses along the lateral extension direction of the second electrode sheet.

6. The electrostatic dust collector according to claim 3, characterized in that: The first supporting boss and the second supporting boss are both prepared by hot pressing or adsorption process, the first supporting boss forms a groove on one side of the first substrate, and the second supporting boss forms a groove on one side of the second substrate, the first supporting boss and the second supporting boss both have a supporting surface and an annular supporting side wall surrounding the supporting surface, and the annular supporting side wall is an inclined surface.

7. The electrostatic dust collector according to claim 3, characterized in that: The first supporting boss and the second supporting boss are both made of hydrophobic material.

8. The electrostatic dust collector according to claim 4, characterized in that: A safety gap is reserved between the first supporting boss and the first conductive layer; A safety gap is reserved between the second supporting boss and the second conductive layer; The safety gap is greater than 1 mm.

9. The electrostatic dust collector according to claim 1, characterized in that: The first supporting boss and the second supporting boss are independent parts, and are respectively attached to the first substrate and the second substrate.

10. The electrostatic dust collector according to claim 1, characterized in that: The distance P1 between two adjacent first supporting bosses on the same side and the thickness T1 of the first substrate satisfy the following relationship: P1<35T1; The distance P2 between two adjacent second supporting bosses on the same side and the thickness T2 of the second substrate satisfy the following relationship: P2<35T2.

11. The electrostatic dust collector according to claim 1, characterized in that: The first conductive layer and the second conductive layer are respectively a collector conductive layer and a repeller conductive layer, and the width of the collector conductive layer is greater than the width of the repeller conductive layer.

12. The electrostatic dust collector according to claim 1, characterized in that: Also includes: The support has a central axis, and the first electrode sheet and the second electrode sheet are spirally wound outside the central axis.

13. An air purification device, characterized in that: It comprises the electrostatic dust collecting device as described in any one of claims 1 to 12 above.

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