Electrostatic filtration device

Abstract

The present disclosure relates to an electrostatic filtering device. The electrostatic filtering device includes a positive electrode plate group and a negative electrode plate group. The positive electrode plate group and the negative electrode plate group use different support components to connect the various electrode plates in the group. At least one first electrode plate or an insulating support plate connected to the first electrode plate is configured to participate in forming a sealed cavity that is a sealed structure at least relative to the windward surface. A second electrode plate with a polarity different from that of the first electrode plate and / or a second support component connected to the second electrode plate are provided in the sealed cavity. The second electrode plate or the second support component is connected to the sealed cavity or the first electrode plate or the first support component connected to the first electrode plate using an insulating material component inside the sealed cavity. The second electrode plate outside the sealed cavity, the second support component outside the sealed cavity, and the second support component when passing through the sealed cavity are not in contact with the sealed cavity. In this way, it is possible to prevent or reduce the contact of unpurified air with the insulating support structure between the positive and negative electrodes.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electrostatic dust removal, and in particular to an electrostatic filtering device. Background Art

[0002] Electrostatic filters have been widely used and developed due to their advantages such as low wind resistance and repeated cleaning.

[0003] The electrostatic filter is composed of alternating positive and negative components to form an electrostatic field, which plays a purification function.

[0004] Flat-plate electrostatic filter is a common type of filter, which is characterized by alternating positive and negative flat-plate electrodes to apply an electric field to the ventilation area to absorb dust.

[0005] Due to the positive and negative high voltages applied to the positive and negative electrodes respectively, the positive and negative electrodes cannot be assembled together directly, but require insulating supports to support them in order to form a complete electrostatic filter. Because the insulating supports will be contaminated by particulate matter in the air during the use of the electrostatic filter, and this pollutant is usually conductive, it is very important to protect the insulating supports. Once the insulating supports become conductive due to the adsorption of pollutants in the air, the leakage current between the positive and negative electrodes will increase. This leakage current will first impact the power supply and significantly increase the power consumption of the power supply. When the leakage power consumption is greater than the load capacity of the power supply, it will cause the power supply voltage to decrease and the filter to fail. For high-resistance electrode plate electrostatic filters, the conduction of the positive and negative poles will directly lead to performance degradation or even failure.

[0006] Therefore, it is necessary to protect the insulating support of the electrostatic filter. Summary of the Invention

[0007] A technical problem to be solved by the present disclosure is how to protect the insulating support of the electrostatic filter.

[0008] The present disclosure provides an electrostatic filtering device, comprising: a positive electrode plate group and a negative electrode plate group, wherein the positive electrode plate group comprises a plurality of positive electrode plates, and the negative electrode plate group comprises a plurality of negative electrode plates, wherein the plurality of positive electrode plates and the plurality of negative electrode plates are arranged alternately and at intervals, the positive electrode plates are connected to the positive pole of a high-voltage power supply, and the negative electrode plates are connected to the negative pole of the high-voltage power supply, the positive electrode plate group and the negative electrode plate group use different supporting components to connect the electrode plates in the group, at least one first electrode plate or an insulating supporting plate connected to the first electrode plate is configured to participate in forming a sealed cavity that is a sealed structure at least relative to a windward surface, wherein a second electrode plate having a polarity different from that of the first electrode plate and / or a second supporting component connected to the second electrode plate is provided in the sealed cavity, the second electrode plate or the second supporting component is connected to the sealed cavity or the first electrode plate or the first supporting component connected to the first electrode plate using an insulating material component inside the sealed cavity, and the second electrode plate outside the sealed cavity, the second supporting component outside the sealed cavity, and the second supporting component passing through the sealed cavity do not contact the sealed cavity.

[0009] Optionally, the at least one first electrode plate includes two first electrode plates located at the edges on both sides, and the two first electrode plates are configured to participate in forming two sealed cavities, each of which is used to at least block the windward surface from the first electrode plate corresponding to the sealed cavity to the edge of the purification area on the side where the first electrode plate is located.

[0010] Optionally, the second electrode plate and / or second support component inside the sealed cavity is in contact with the sealed cavity, or the gap between the second electrode plate and / or second support component inside the sealed cavity and the sealed cavity is greater than or equal to the minimum plate spacing.

[0011] Optionally, the sealed cavity is formed by a sealing component provided by the electrostatic filtering device itself, or the sealed cavity is formed by the electrostatic filtering device in combination with an external frame.

[0012] Optionally, the opening portion provided on the sealed cavity for the second supporting member to pass through is provided near the center of the sealed cavity, or is provided on both sides of the center of the sealed cavity and away from the windward surface.

[0013] Optionally, an air intake channel is provided on the sealed cavity, and the air intake channel has a predetermined length in the direction of the electrode plate spacing. The second support component passes through the air intake channel and is connected to the second electrode plate outside the sealed cavity. The air intake channel is a hollow structure, and the gap between the air intake channel and the part of the second support component located in the air intake channel forms an annular channel. The annular channel is used to electrostatically adsorb fine particulate matter in the air entering the sealed cavity through the annular channel.

[0014] Optionally, a gap between the air inlet channel and a portion of the second support component located in the air inlet channel is greater than or equal to a minimum plate spacing.

[0015] Optionally, the insulating material component is an insulator with a specific structure for increasing the length of the insulating path.

[0016] Optionally, a first insulating support plate and a second insulating support plate are provided in the sealed cavity, the first insulating support plate is connected to the support component for connecting the positive electrode plate, the second insulating support plate is connected to the support component for connecting the negative electrode plate, and the first insulating support plate and the second insulating support plate are also connected by insulating material.

[0017] Optionally, the first insulating support plate and the second insulating support plate are connected using an insulator with a specific structure for increasing an insulating path.

[0018] The present disclosure adopts polarization support on the basis of configuring at least one first electrode plate or an insulating support plate connected to the first electrode plate to participate in forming a sealed cavity that is a sealed structure at least relative to the windward surface, and a second electrode plate with a polarity different from that of the first electrode plate and / or a second support component connected to the second electrode plate is provided in the sealed cavity. The second electrode plate or the second support component is connected to the sealed cavity or the first electrode plate or the first support component connected to the first electrode plate using an insulating material component inside the sealed cavity, so that the sealed cavity can protect the insulating support structure between the positive and negative electrodes, and prevent or reduce the contact of unpurified air with the insulating support structure between the positive and negative electrodes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the present disclosure will become more apparent through a more detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings, wherein like reference numerals generally represent like components in the exemplary embodiments of the present disclosure.

[0020] Figure 1 A simplified schematic diagram showing the first support method between the positive and negative electrodes.

[0021] Figure 2 A simplified schematic diagram showing a second support method between the positive and negative electrodes.

[0022] Figure 3 Shown are structural schematic diagrams of two sealed cavities.

[0023] Figure 4 A schematic structural diagram of another sealed cavity is shown.

[0024] Figure 5A structural schematic diagram of an electrostatic filtering device according to an embodiment of the present disclosure is shown.

[0025] Figure 6 A schematic structural diagram of an electrostatic filtering device according to another embodiment of the present disclosure is shown.

[0026] Figure 7 A schematic diagram of a method for fixing positive and negative electrode groups in a sealed cavity is shown.

[0027] Figure 8 A schematic diagram of a method for fixing positive and negative electrode groups in a sealed cavity according to an embodiment of the present disclosure is shown.

[0028] Figure 9 A schematic diagram of a method for fixing positive and negative electrode groups in a sealed cavity according to another embodiment of the present disclosure is shown.

[0029] Figure 10 A schematic structural diagram of an electrostatic filtering device according to another embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0031] A complete electrostatic filter consists of a charging device and a filtering device.

[0032] The function of the charging device is to charge the fine particles in the air and make them electrically charged.

[0033] The filter device absorbs charged particles through the electrostatic field to achieve the effect of air purification.

[0034] The present disclosure only involves improvements to the filtering device, and does not involve improvements to the charging device. Therefore, the present disclosure does not describe the charging device, but focuses on describing the filtering device. It should be understood that the filtering device (i.e., the electrostatic filtering device) described in the present disclosure can be used in conjunction with the charging device to form a complete electrostatic filter. In other words, the electrostatic filtering device described in the present disclosure can also include a charging device to form a complete electrostatic filter. In addition, some of the test cases mentioned in the article are by default the results of tests with the charging device.

[0035] Common electrostatic filters include plate type and honeycomb type. The electrostatic filter device in this disclosure refers to a flat plate type electrostatic filter device. In this disclosure, the terms "electrode" and "electrode plate" can be used interchangeably.

[0036] First, the positive and negative electrodes can be supported separately to avoid conduction between the positive and negative electrodes.

[0037] Separate positive and negative electrode supports: All positive electrodes use one set of support structures, and all negative electrodes use another set of support structures. This separate positive and negative electrode support method can effectively prevent direct conduction between electrodes in ventilated areas.

[0038] These two support systems ultimately need to be fixed together to support the entire electrostatic filter.

[0039] To do this, two approaches can be adopted.

[0040] The first method is to use insulating materials to fix the positive and negative poles at the edge of the electrostatic filter.

[0041] The advantage of this approach is that it minimizes the number of fixing points between the positive and negative electrodes, with only a few support points at the very edges. Furthermore, insulators can be used in the support structures to maximize the connection path between the positive and negative electrodes. However, since this approach exposes the support components directly to ventilation, contaminants are easily attached, which can quickly lead to conduction between the positive and negative electrodes.

[0042] Figure 1 A simplified schematic diagram showing the first support method between the positive and negative electrodes.

[0043] Figure 1 The red color represents the positive electrode, and the blue color represents the negative electrode. The support structure of electrodes with the same polarity is omitted here, and the purple color represents the support structure between the positive and negative electrodes. Figure 1 The arrows in the diagram indicate the direction of flow of the unpurified air.

[0044] It should be understood that, unless otherwise specified, the same colors or marks in the drawings of the present disclosure represent the same contents.

[0045] Figure 1 The left side view in the figure shows that the two support systems are finally fixed together by setting a positive and negative electrode support structure for connecting the positive electrode and the negative electrode at the outermost edge. Figure 1 The right side view in the figure refers to an insulating support plate provided at the outermost sides of each side, and the two support systems are fixed together by connecting the two support systems to the outermost insulating support plates respectively.

[0046] See also Figure 1 Without any protection, unpurified air directly contacts the support structure between the positive and negative electrodes (i.e. the purple part), and pollutants adhere to it, causing the positive and negative electrodes to conduct.

[0047] The second method is to use insulating material to fix the positive and negative electrodes at the very edge of the electrostatic filter, and at the same time block the fixed positions of the positive and negative electrodes on the windward side. By reducing the amount of unpurified air flowing through the support structure between the positive and negative electrodes, the time required for the insulating support material between the positive and negative electrodes to be contaminated is prolonged. Among them, the windward side refers to the side that unpurified gas (air) first contacts when entering the purification area. Correspondingly, the air outlet side mentioned below refers to the side that the purified gas contacts when leaving the purification area.

[0048] Figure 2 A simplified schematic diagram showing a second support method between the positive and negative electrodes.

[0049] See also Figure 2 As shown in the left view, this shielding must be in close contact with the electrode surface to achieve a certain degree of sealing. Once it is in close contact, the positive and negative electrodes will be connected through the shielding part, and the shielding part will also be contaminated, so the positive and negative electrodes will quickly be connected by the contaminants. Figure 2 As shown in the right view, if it is not tightly attached, air will enter the shielding part through the gap in the form of eddy currents, making the shielding effect meaningless, and the insulating support components between the positive and negative poles will still be quickly contaminated.

[0050] Given the above situation, the insulating support components between the positive and negative electrodes of an electrostatic filter are rapidly contaminated by pollutants. This leads to a significant increase in leakage current between the positive and negative electrodes, resulting in increased power consumption. This is particularly serious for electrostatic filters with high-resistance electrode plates. The connection between the positive and negative electrodes through pollutants can directly lead to performance degradation or even failure. This results in the need for frequent filter cleaning.

[0051] Therefore, further solutions are needed to improve the electrical isolation between the positive and negative electrodes.

[0052] It's unrealistic to increase the electrical isolation between the positive and negative electrodes in ventilated areas. Because contaminants are inherently conductive, once they adhere to the insulating support between the electrodes, the insulation is destroyed, causing them to become charged. This area then becomes part of the electrostatic filter and begins to attract dust. Therefore, the destruction of the insulation between the electrodes is a self-reinforcing process; the more severe the insulation damage, the faster it becomes contaminated.

[0053] It is impossible to completely prevent contamination of the support area between the positive and negative electrodes, as the support structures must be fixed to each other and have physical connections. In view of this, the present disclosure proposes to improve the contamination of the support area between the positive and negative electrodes from the following aspects.

[0054] First, minimize the contact of unpurified air with the support parts between the positive and negative electrodes

[0055] First, the present disclosure considers using sealing methods to minimize the exposure of unpurified air to the support between the positive and negative electrodes. The key point here is to use one polarity electrode or insulating material to form a sealed space to protect the inter-electrode support assembly made of insulating material.

[0056] Based on this, the present disclosure proposes an electrostatic filtering device.

[0057] The electrostatic filtration device includes a positive electrode plate group and a negative electrode plate group. The positive electrode plate group includes multiple positive electrode plates. The negative electrode plate group includes multiple negative electrode plates. The multiple positive electrode plates and the multiple negative electrode plates are arranged alternately. The positive electrode plates are connected to the positive terminal of a high-voltage power supply, and the negative electrode plates are connected to the negative terminal of the high-voltage power supply.

[0058] It should be understood that the focus of this disclosure is on protecting the support portion between the positive and negative electrodes. Therefore, this disclosure does not limit the electrical characteristics of the electrode plates themselves. In some exemplary embodiments, at least one of the multiple positive electrode plates and the multiple negative electrode plates (for example, some or all of the electrode plates) uses a plate with a conductive material wrapped in an insulating material.

[0059] The positive electrode plate group and the negative electrode plate group use different support components to connect the electrode plates in the group. That is, the positive electrode plate group and the negative electrode plate group use a positive and negative electrode polarity support method to prevent the positive and negative electrodes from conducting.

[0060] At least one first electrode plate or an insulating support plate connected to the first electrode plate is configured to participate in forming a sealed cavity that is a sealed structure at least relative to the windward surface. The at least one may be one or more. In the case where the at least one is multiple, these multiple first electrode plates have the same polarity, specifically, they may be positive electrode plates or negative electrode plates. The insulating support plate connected to the first electrode plate refers to an internal component of the electrode plate group with the same polarity as the first electrode plate, for example, it may be an insulating support plate located on the side of the first electrode plate close to the windward surface (it may also include a side close to the wind outlet surface).

[0061] In some exemplary embodiments, the at least one first electrode plate includes two first electrode plates located at two side edges. These two first electrode plates are configured to form two sealed cavities. Each sealed cavity is configured to shield at least the windward side from the first electrode plate corresponding to the sealed cavity to the edge of the purification area on the side where the first electrode plate is located. In other words, electrode plates can be selected at the two side edges to form two sealed cavities at the two side edges.

[0062] It should be understood that the first electrode plates corresponding to the two sealed cavities formed at the two side edges can be electrode plates with the same polarity or electrode plates with different polarities. In other words, for one side edge, the positive electrode plate at that edge or the insulating support plate connected to the positive electrode plate can be used to participate in forming the sealed cavity at that side edge; and for the other side edge, the negative electrode plate at that edge or the insulating support plate connected to the negative and positive electrode plates can be used to participate in forming the sealed cavity at that side edge.

[0063] All materials constituting the sealed cavity, whether conductive or insulating, can be regarded as materials that may be connected to the first electrode plate due to conductive contaminants, and thus the entire sealed cavity can be regarded as a possible first electrode plate.

[0064] Typically, an electrostatic filter device is provided with an external frame when installed. Therefore, the sealed cavity can be formed by the sealing components provided by the electrostatic filter device itself. Alternatively, the sealed cavity can be formed by the electrostatic filter device in combination with the external frame.

[0065] Figure 3 Shown are structural schematic diagrams of two sealed cavities.

[0066] Figure 3 The portion shown by the pink dotted line in FIG represents the insulating material that contacts the positive electrode and participates in forming the sealed cavity. Figure 3 As shown, the sealed cavity can be independently formed by the electrostatic filtering device. Figure 3 The left side view shows the sealing cavity that seals only the windward side. Figure 3 The right side view shows the sealing cavity that seals both the windward side and the wind outlet side.

[0067] Figure 4 A schematic structural diagram of another sealed cavity is shown.

[0068] Figure 4 The pink frame indicates the plastic frame outside the electrostatic filter unit. Figure 4 As shown, the positive electrode and the plastic outer frame of the electrostatic filter device can be used together to form a sealed cavity.

[0069] A second electrode plate having a different polarity than the first electrode plate and / or a second support member connected to the second electrode plate may be disposed within the sealed cavity. The second support member, whether conductive or insulating, may be considered a material that may be in contact with the second electrode plate due to conductive contaminants, and thus may be considered a potential second electrode plate.

[0070] The second electrode plate or the second support member is connected to at least one of the sealing cavity, the first electrode plate, and the first support member connected to the first electrode plate by using an insulating material assembly inside the sealing cavity. Wherein, when the sealing cavity is composed of the first electrode plate, the second electrode plate or the second support member is connected to the sealing cavity by using an insulating material assembly inside the sealing cavity, which is equivalent to being connected to the first electrode plate.

[0071] The insulating material assembly is equivalent to an insulating support structure between the positive and negative electrodes. By setting the second electrode plate or the second support member to be connected to the sealing cavity or the first electrode plate or the first support member connected to the first electrode plate by using an insulating material assembly inside the sealing cavity, the sealing cavity can protect the insulating support structure between the positive and negative electrodes and prevent or reduce the contact of unpurified air with the insulating support structure between the positive and negative electrodes.

[0072] As described above, the positive electrode plate group and the negative electrode plate group use different support member connection groups to connect each electrode plate in the group, and the positive and negative electrodes are connected by an insulating material assembly, which is equivalent to the support members of the positive and negative electrode plate groups (i.e., two sets of support members) being finally fixedly connected through the insulating material assembly.

[0073] Figure 5 The structural schematic diagram of an electrostatic filtering device according to an embodiment of the present disclosure is shown.

[0074] Figure 5 The left view in shows that the second electrode plate (the negative electrode plate shown in blue in the figure) in the sealing cavity is connected to the first electrode plate (the positive electrode plate shown in red in the figure) by using an insulating material assembly (the "cross" structure shown in purple in the figure). Figure 5 The right view in shows that the second electrode plate in the sealing cavity is connected to the sealing cavity by using an insulating material assembly. Wherein, the insulating material assembly can be an insulator with a specific structure for increasing the insulation path length. For example, in addition to being Figure 5 the "cross" - shaped insulator shown in, it can also be a "rich" - shaped insulator. The "cross" - shaped and "rich" - shaped insulators refer to increasing the conduction path through some protruding parts (such as annular parts) on the insulator main structure. Among them, the insulator that increases the conduction path through one protruding part on the insulator main structure is the "cross" - shaped insulator, and the insulator that increases the conduction path through two, three or more protruding parts on the insulator main structure can be regarded as the "rich" - shaped insulator. For the consideration of structural compactness, the Figure 5 shown "cross" - shaped insulator can be adopted.

[0075] The second electrode plate and / or the second support component inside the sealed cavity may be in contact with the sealed cavity. Alternatively, the second electrode plate and / or the second support component inside the sealed cavity may not be in contact with the sealed cavity, but in the case of no contact, it should be ensured that the gap between the sealed cavity is greater than or equal to the minimum plate spacing to avoid the risk of fire. The minimum plate spacing refers to the minimum value of the distance between all two adjacent electrode plates in the electrostatic filtration device, that is, the minimum plate spacing between the positive and negative electrodes. The second electrode plate outside the sealed cavity, the outside of the sealed cavity, and the second support component when passing through the sealed cavity are not in contact with the sealed cavity to avoid conduction between the positive and negative electrodes.

[0076] The sealed cavity and the electrodes of the electrostatic filter outside the sealed cavity are two independent components that need to be effectively connected to truly ensure the overall support structure of the electrostatic filtration device. In other words, the sealed cavity needs to form a physical connection with the electrode plate group with the same polarity as the first electrode plate in the air purification area (i.e., the air purification area formed by the positive and negative electrode plates outside the sealed cavity); and the second electrode plate in the sealed cavity, or the second supporting component connected to the second electrode plate in the sealed cavity, needs to form a physical connection with the electrode plate group with the same polarity as the second electrode plate in the air purification area; thereby ultimately achieving the support of the sealed cavity for the positive and negative electrodes of the entire electrostatic filter.

[0077] Since the sealed cavity is exposed, the sealed cavity can be directly connected to the support structure (i.e., the first support component) of the electrode plate group with the same polarity as the first electrode plate outside the sealed cavity. The second electrode plate or the second support component in the sealed cavity must be connected to the outside of the sealed cavity through the openings (i.e., openings) on the sealed cavity. Although the openings will also cause unpurified air to enter the sealed cavity, the number and size of the openings are controllable, and these openings must exist regardless of whether a sealed cavity is used to protect the insulating support structure between the positive and negative electrodes. The use of a sealed cavity is equivalent to reducing the gap that needs to be maintained between the electrode and the outer frame.

[0078] For example, if the length of an electrode is 300mm and the spacing between the electrodes is 2mm, then normally the minimum gap between the electrode and the outer frame is also 2mm. The air leakage area from the windward side is the length * width of the gap, which is 600mm. 2 Assuming that a support component is required every 50mm, a total of 5 support components are required on the windward side. These 5 support components correspond to a 6mm diameter sealing cavity opening and a 2mm diameter support component. Similarly, the distance between the negative electrode support component and the sealing cavity opening is 2mm. The total area of ​​the five holes is 125.6mm. 2 Therefore, if there is a gap between the electrode and the outer frame, the total air leakage area on the windward side is 600+15.6=725.6mm2 If a single-polarity electrode is used to seal the gap, the air leakage area is 125.6mm 2 , the air leakage area was reduced by 82.7%.

[0079] Secondly, before the dirty air contacts the supporting parts between the positive and negative electrodes, it flows through the area with purification capabilities Method 1

[0080] The supporting component can be kept as far away from the windward surface as possible, for example, by setting it at the center of the electrode. Then, the air entering the sealed cavity through the avoidance hole of the supporting component will be partially purified, thereby reducing the concentration of pollutants entering the sealed cavity and achieving the purpose of protecting the insulating components in the sealed cavity.

[0081] That is to say, the opening portion provided on the sealed cavity for the second supporting member to pass through can be provided near the center of the sealed cavity, or on both sides of the center of the sealed cavity away from the windward surface.

[0082] Method 2

[0083] The channel through which air enters the sealed cavity can also be used to form a micro air purification structure to purify the air entering the cavity. Exemplarily, an air inlet channel is provided on the sealed cavity, and the air inlet channel has a certain length in the direction of the plate spacing. The second support component passes through the air inlet channel, and the air inlet channel is a hollow structure. The gap between the air inlet channel and the portion of the second support component located in the air inlet channel forms an annular channel, and the annular channel is used to electrostatically adsorb fine particulate matter in the air entering the sealed cavity through the annular channel. The gap between the air inlet channel and the portion of the second support component located in the air inlet channel can be greater than or equal to the minimum plate spacing to fully purify the fine particulate matter in the air entering the sealed cavity.

[0084] Figure 6 A schematic structural diagram of an electrostatic filtering device according to another embodiment of the present disclosure is shown.

[0085] like Figure 6 As shown, assuming that the sealed cavity assembly is associated with the negative electrode, the positive electrode support structure will pass through the middle opening. The single-layer structure of the sealed cavity assembly is made into a double-layer structure, and an annular channel is added between the two layers (see Figure 6 Left side view), so that the air flowing into the sealed chamber must pass through this channel, and the middle of this channel is the positive electrode, and the side wall is the negative electrode. This is a classic electrostatic filter structure, so it can effectively adsorb pollutants passing through the channel, thereby achieving the purpose of reducing the concentration of pollutants entering the sealed chamber.

[0086] Method 1 and method 2 can be used in combination or one of them can be used separately.

[0087] Third aspect: Try to maximize the support short - circuit path between the positive and negative electrodes

[0088] The most basic way to fix the positive and negative electrode groups is to directly use insulating connectors for fixation in the sealed cavity.

[0089] Figure 7 Fig. shows a schematic diagram of the fixation method of the positive and negative electrode groups in a sealed cavity.

[0090] As Figure 7 shown, due to space limitations, the length of the directly - connected insulating component cannot be made very long. Therefore, the insulation path between the positive and negative electrodes will be relatively short, and the insulation characteristics are likely to be damaged in a relatively short time.

[0091] In view of this, the present disclosure proposes that an insulator (i.e., an insulating spacer) with a specific structure that can increase the insulation path length can be used to increase the insulation path between the positive and negative electrodes. For example, referring to the description above in combination with Figure 5 , insulators in the shapes of "cross", "abundant" characters, etc. can be used to greatly increase the insulation path using the limited space. Fixing the positive and negative electrode groups with insulators can increase the conduction path several times without requiring a large installation space.

[0092] Figure 8 Fig. shows a schematic diagram of the fixation method of the positive and negative electrode groups in a sealed cavity according to an embodiment of the present disclosure.

[0093] As Figure 8 shown, an insulator in the shape of a "cross" can be used to connect the positive and negative electrode plates in the sealed cavity.

[0094] The present disclosure also proposes another way to increase the insulation path between the positive and negative electrodes, that is, to use a two - phase insulation support plate.

[0095] Specifically, a first insulation support plate and a second insulation support plate are provided in the sealed cavity. The first insulation support plate is connected to the support component for connecting the positive electrode plate, and the second insulation support plate is connected to the support component for connecting the negative electrode plate. The first insulation support plate and the second insulation support plate are also connected by an insulating material. The insulating material connecting the first insulation support plate and the second insulation support plate can use an insulator.

[0096] Figure 9 Fig. shows a schematic diagram of the fixation method of the positive and negative electrode groups in a sealed cavity according to another embodiment of the present disclosure.

[0097] As Figure 9As shown, the orange plate within the sealed cavity corresponds to the second insulating support plate mentioned above, responsible for supporting the red negative electrode group. The light blue plate within the sealed cavity corresponds to the first insulating support plate mentioned above, responsible for supporting the blue positive electrode group. The support structure within the electrode group is also represented by the same color. The orange and light blue plates are then fixed to each other using insulators.

[0098] It can be seen that such a setting further increases the insulation path. At the same time, due to mechanical strength and production process reasons, it is also a common practice to use insulating materials as supports on the edge of the electrostatic filter. Since it is not related to the invention point of this disclosure, it will not be further elaborated. What is emphasized here is that the use of two independent insulating support plates to support the positive and negative electrode groups respectively, and then using insulators to fix the two insulating support plates to each other can achieve the effect of increasing the insulation path.

[0099] Figure 10 A schematic structural diagram of an electrostatic filtering device according to another embodiment of the present disclosure is shown.

[0100] Figure 10 The electrostatic filtration device shown is an example of combining all three aspects to reduce the contamination level of the insulating support components between the positive and negative electrodes. Figure 10 As shown, the negative electrodes and outer frame at the edges of the electrostatic filter can be used to construct a sealed cavity. Ring channels are provided at the perforations of the negative electrodes that form the sealed cavity to absorb contaminants entering through these perforations. A dual-phase support structure and insulators are then used to increase the insulation path length between the positive and negative electrodes within the sealed cavity, minimizing the risk of short circuits between the positive and negative electrodes caused by contaminants.

[0101] Figure 10 Two cases are given: the electrostatic filter device completes the sealing of the cavity independently, and the electrostatic filter device and its external frame complete the sealing of the cavity together. Specifically, Figure 10 The left side view shows that the electrostatic filter device independently completes the sealing of the cavity. Figure 10 The right side view shows that the electrostatic filter device and its external frame (shown by the pink dotted line in the figure) together complete the sealed cavity.

[0102] In summary, the present disclosure, through sealing, adsorption, and extended insulation paths, can greatly protect the support structure between the positive and negative electrodes of an electrostatic filter from contamination, thereby significantly reducing leakage current between the positive and negative electrodes. This can significantly reduce the power consumption of the electrostatic filter, lowering the power requirements of the equipment and thus saving energy and reducing emissions. Furthermore, for electrostatic filters with high-resistivity electrodes, where leakage current between the positive and negative electrodes directly affects purification efficiency, the present disclosure can significantly extend the service life of such filters.

[0103] The electrostatic filtering device according to the present disclosure has been described above in detail with reference to the accompanying drawings.

[0104] While various embodiments of the present disclosure have been described above, the above descriptions are illustrative, non-exhaustive, and not intended to be limiting of the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to existing technologies, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An electrostatic filtration device, comprising: Positive electrode plate group and negative electrode plate group, The positive electrode plate group includes a plurality of positive electrode plates, The negative electrode plate group includes a plurality of negative electrode plates, The plurality of positive electrode plates and the plurality of negative electrode plates are arranged alternately and at intervals. The positive electrode plate is connected to the positive electrode of the high-voltage power supply, and the negative electrode plate is connected to the negative electrode of the high-voltage power supply. The positive electrode plate group and the negative electrode plate group use different supporting members to connect the electrode plates in the group. At least one first electrode plate or an insulating support plate connected to the first electrode plate is configured to participate in forming a sealed cavity that is a sealed structure at least relative to the windward surface. A second electrode plate having a different polarity from that of the first electrode plate and / or a second supporting component connected to the second electrode plate is provided in the sealed cavity, and the second electrode plate or the second supporting component is connected to the sealed cavity or the first electrode plate or the first supporting component connected to the first electrode plate using an insulating material component inside the sealed cavity. The second electrode plate outside the sealed cavity, the outside of the sealed cavity, and the second supporting component passing through the sealed cavity are not in contact with the sealed cavity.

2. The electrostatic filtration device according to claim 1, wherein: The at least one first electrode plate includes two first electrode plates located at both side edges, The two first electrode plates are configured to participate in forming the two sealed cavities, Each of the sealed cavities is used to shield at least the windward surface from the first electrode plate corresponding to the sealed cavity to the edge of the purification area on the side where the first electrode plate is located.

3. The electrostatic filtration device according to claim 1, wherein: The second electrode plate and / or the second support member inside the sealed cavity are in contact with the sealed cavity, or The gap between the second electrode plate and / or the second supporting component inside the sealed cavity and the sealed cavity is greater than or equal to the minimum electrode plate spacing.

4. The electrostatic filtration device according to claim 1, wherein: The sealed cavity is formed by a sealing component provided by the electrostatic filter device itself, or The sealed cavity is formed by the electrostatic filtering device and an external frame.

5. The electrostatic filtration device according to claim 1, wherein: The opening portion provided on the sealed cavity for the second supporting member to pass through is provided near the center of the sealed cavity, or is provided on both sides of the center of the sealed cavity and away from the windward surface.

6. The electrostatic filtration device according to claim 1, wherein: The sealed cavity is provided with an air inlet channel, and the air inlet channel has a predetermined length in the direction of the plate spacing. The second support component passes through the air intake channel, and the air intake channel is a hollow structure. The gap between the air intake channel and the part of the second support component located in the air intake channel forms an annular channel, and the annular channel is used to electrostatically adsorb fine particles in the air entering the sealed cavity through the annular channel.

7. The electrostatic filtration device according to claim 6, wherein: A gap between the air inlet passage and a portion of the second support component located in the air inlet passage is greater than or equal to a minimum plate spacing.

8. The electrostatic filtration device according to claim 1, wherein: The insulating material component is an insulator with a specific structure for increasing the length of an insulating path.

9. The electrostatic filtration device according to claim 1, wherein: The sealed cavity is provided with a first insulating support plate and a second insulating support plate. The first insulating support plate is connected to a support member for connecting a positive electrode plate. The second insulating support plate is connected to a support member for connecting a negative electrode plate, The first insulating support plate and the second insulating support plate are further connected by insulating material.

10. The electrostatic filtration device according to claim 9, wherein: The first insulating support plate and the second insulating support plate are connected by an insulator with a specific structure for increasing an insulating path.

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