Electrostatic filtering device

Abstract

The invention relates to an electrostatic filtering device. And the electrostatic filtering device comprises a positive electrode plate group and a negative electrode plate group. The positive electrode plate group and the negative electrode plate group are connected with the electrode plates in the groups by using different supporting parts, and at least one first electrode plate or an insulating supporting plate connected with the first electrode plate is configured to participate in forming a sealed cavity which is at least of a sealed structure relative to a windward side; a second electrode plate different from the first electrode plate in polarity and / or a second supporting component connected with the second electrode plate are arranged in the sealed cavity, and the second electrode plate or the second supporting component is connected with the sealed cavity or the first electrode plate or a first supporting component connected with the first electrode plate through an insulating material assembly in the sealed cavity. And the second electrode plate outside the sealing cavity, the outside of the sealing cavity and the second supporting part penetrating through the sealing cavity are not in contact with the sealing cavity. Therefore, unpurified air can be prevented or reduced from contacting the insulation supporting structure between the positive electrode and the negative electrode.

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 positive and negative components arranged alternately to form an electrostatic field, thereby achieving a purification function.

[0004] The flat-plate electrostatic filter is a common type of filter, which is characterized by the alternating arrangement of 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 need to be supported by insulating supports 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 electrodes 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, the positive electrode plate group comprising a plurality of positive electrode plates, the negative electrode plate group comprising a plurality of negative electrode plates, the plurality of positive electrode plates and the plurality of negative electrode plates being arranged alternately and spaced apart, the positive electrode plate being connected to a positive electrode of a high-voltage power supply, the negative electrode plate being connected to a negative electrode of a high-voltage power supply, the positive electrode plate group and the negative electrode plate group using 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 being configured to participate in forming a sealed cavity which is a sealed structure at least relative to a windward surface, 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 being provided in the sealed cavity, the second electrode plate or the second supporting component being connected to the sealed cavity or the first electrode plate or the first supporting component connected to the first electrode plate being connected inside the sealed cavity using an insulating material component, and the second electrode plate outside the sealed cavity, the second supporting component outside the sealed cavity, and the second supporting component when passing through the sealed cavity are not in contact with the sealed cavity.

[0009] Optionally, the at least one first electrode plate includes two first electrode plates located at the edges of 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 shield 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 the second support component inside the sealed cavity is in contact with the sealed cavity, or the gap between the second electrode plate and / or the second support component inside the sealed cavity and the sealed cavity is greater than or equal to the minimum electrode 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 close to the center of the sealed cavity, or is provided on one side away from the windward surface on both sides of the center of the sealed cavity.

[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 particles in the air entering the sealed cavity through the annular channel.

[0014] Optionally, 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.

[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 a support component for connecting a positive electrode plate, the second insulating support plate is connected to a support component for connecting a 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 by an insulator with a specific structure for increasing an insulating path.

[0018] The present invention 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 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, 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 in conjunction with 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 The schematic diagrams of the structures of two sealing cavities are shown.

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

[0024] Figure 5A schematic structural 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 a positive and negative electrode group 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] Fig. 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] Fig.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 the 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. On the contrary, 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] The complete electrostatic filter includes 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, but not to the charging device. Therefore, the present disclosure does not describe the charging device, but focuses on describing the filtering device. It should be known 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 testing with the charging device.

[0035] Common electrostatic filters include plate type and honeycomb type. The electrostatic filter device in the present disclosure refers to a flat plate type electrostatic filter device. In the present 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] Positive and negative electrode polarization support means that all positive electrodes use one set of support structure, and all negative electrodes use another set of support structure. This method of polarization support for positive and negative electrodes can effectively prevent direct conduction of electrodes in ventilation 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 used.

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

[0041] The advantage of this is that the number of fixing points between the positive and negative electrodes is reduced to a minimum, with only a few supporting points at the edge. At the same time, an insulator structure can be used in the supporting part to maximize the connection path between the positive and negative electrodes. However, since the supporting parts are directly exposed in the ventilated area, pollutants are very easy to adhere to, so the positive and negative electrodes will soon be connected.

[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 supporting structure of electrodes with the same polarity is omitted here, and the purple color represents the supporting 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 refers to the two sets of support systems being finally fixed together by setting a positive-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 means that an insulating support plate is respectively arranged at the outermost sides of both sides, and the two sets of support systems are fixed together by connecting the two sets of support systems to the insulating support plates arranged at the outermost sides 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 materials to fix the positive and negative electrodes at the very edge of the electrostatic filter, and at the same time shield the fixed positions of the positive and negative electrodes on the windward side, thereby reducing the amount of unpurified air flowing through the support structure between the positive and negative electrodes and extending the time required for the contamination of the insulating support material between the positive and negative electrodes. The windward side refers to the side that the unpurified gas (air) first contacts when entering the purification area. Accordingly, the windward 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 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 soon 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] In view of the above situation, the insulating support parts between the positive and negative electrodes of the electrostatic filter will always be quickly contaminated by pollutants, which will cause a significant increase in the leakage current between the positive and negative electrodes of the electrostatic filter, resulting in an increase in power consumption. Especially for high-resistance electrode plate electrostatic filters, the situation will be more serious. The connection between the positive and negative electrodes through pollutants will directly lead to performance degradation or even failure. At this time, the filter needs to be cleaned frequently.

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

[0052] It is unrealistic to enhance the electrical isolation between the positive and negative electrodes in the ventilation area. Because the pollutants themselves have conductive properties, once the pollutants are attached to the insulating support parts between the electrodes, the insulation properties of the parts will be destroyed and charged, so the parts become part of the electrostatic filter and begin to absorb dust. Therefore, the destruction of the insulation properties of the support parts between the electrodes is a self-enhancing process. The more serious the insulation properties are destroyed, the faster it will be further polluted.

[0053] It is impossible to completely prevent the support parts between the positive and negative electrodes from being contaminated, because the support structures must be fixed to each other and have physical connection characteristics. In view of this, the present disclosure proposes to improve the contamination of the support parts 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] In the first aspect, the present disclosure considers using sealing means to minimize the contact of unpurified air with the support part between the positive and negative electrodes. The first key point involved here is to use one of the polarity electrodes, or insulating materials, to form a sealed space to protect the inter-electrode support assembly made of insulating materials.

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

[0057] The electrostatic filtering device includes a positive electrode plate group and a 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 spaced apart. 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.

[0058] It should be understood that the focus of the present disclosure is to protect the supporting parts between the positive and negative electrodes. Therefore, the present disclosure does not limit the electrical characteristics of the electrode plate itself. 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 an insulating material wrapped around a conductive material.

[0059] The positive electrode plate group and the negative electrode plate group use different supporting components to connect the electrode plates in the group. That is, the positive electrode plate group and the negative electrode plate group use the method of supporting the positive and negative electrodes separately to avoid the positive and negative electrodes from being conductive.

[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. At least one may be one or more. In the case where at least one is multiple, these multiple first electrode plates have the same polarity, and may be a positive electrode plate or a negative electrode plate. 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 (and 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 the edges of both sides. The two first electrode plates are configured to participate in forming two sealed cavities. Each sealed cavity 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. In other words, the electrode plates at the edges of both sides can be selected to form two sealed cavities at the edges of both sides.

[0062] It should be known that the first electrode plates corresponding to the two sealed cavities formed at the edges of both sides may be electrode plates with the same polarity or electrode plates with different polarities. That is to say, for one edge, the positive electrode plate at the edge or the insulating support plate connected to the positive electrode plate may be used to participate in forming the sealed cavity at the edge; and for the other edge, the negative electrode plate at the edge or the insulating support plate connected to the negative and positive electrode plates may be used to participate in forming the sealed cavity at the 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] Usually, the electrostatic filter device has an outer frame when installed. Therefore, the sealed cavity can be formed by the sealing components provided by the electrostatic filter device itself. The sealed cavity can also be formed by the electrostatic filter device and the external frame.

[0065] Figure 3 The schematic diagrams of the structures of two sealing cavities are shown.

[0066] Figure 3 The portion shown by the pink dotted line in FIG. 1 represents the insulating material that is in contact with 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. 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 from the first electrode plate and / or a second support component connected to the second electrode plate may be provided in the sealed cavity. The second support component, whether conductive or insulating, may be regarded as a material that may be connected to the second electrode plate due to conductive contaminants, and thus the second support component may be regarded as a possible second electrode plate.

[0070] The second electrode plate or the second supporting member is connected to at least one of the sealed cavity, the first electrode plate, and the first supporting member connected to the first electrode plate using an insulating material component inside the sealed cavity. Wherein, in the case where the sealed cavity is composed of the first electrode plate, the second electrode plate or the second supporting member is connected to the sealed cavity using an insulating material component inside the sealed cavity, which can be equivalent to being connected to the first electrode plate.

[0071] The insulating material assembly is equivalent to the insulating support structure between the positive and negative electrodes. By setting the second electrode plate or the second support component to be connected to the sealed cavity or the first electrode plate or the first support component connected to the first electrode plate using the insulating material assembly inside the sealed cavity, 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.

[0072] As described above, the positive electrode plate group and the negative electrode plate group use different supporting components to connect the individual electrode plates in the group, and the positive and negative electrodes are connected by an insulating material component, which is equivalent to the positive and negative electrode plate group supporting components (i.e., two sets of supporting components) being ultimately fixedly connected by an insulating material component.

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

[0074] Figure 5 The left side view in the figure shows that the second electrode plate in the sealed cavity (the negative electrode plate represented by blue in the figure) is connected to the first electrode plate (the positive electrode plate represented by red in the figure) using an insulating material component (the "cross" structure shown in purple in the figure). Figure 5 The right side view in FIG. 1 shows that the second electrode plate in the sealed cavity is connected to the sealed cavity using an insulating material component. The insulating material component may be an insulator of a specific structure for increasing the length of the insulating path. For example, in addition to being Figure 5 In addition to the "X"-shaped insulator shown in the figure, there can also be a "Feng"-shaped insulator. The "X"-shaped and "Feng"-shaped insulators refer to the insulator main structure that increases the conduction path through some protruding parts (such as ring parts). Among them, the insulator that increases the conduction path through one protruding part on the insulator main structure is a "X"-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 a "Feng"-shaped insulator. For the sake of compact structure, it can be used Figure 5 The "cross" shaped insulator shown.

[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 sparking. 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 sheet 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, which 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, finally realizing 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 can 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, assuming that 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 of the sealing cavity opening and a 2mm diameter of the support component. Similarly, the distance between the negative electrode support component and the sealing cavity opening is 2mm, so 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] Second, before the dirty air contacts the supporting parts between the positive and negative electrodes, it flows through the area with purification capability. 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 close to the center of the sealed cavity, or provided on the side away from the windward surface on both sides of the center of the sealed cavity.

[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 particles 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, so as to fully purify the fine particles 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 in the figure, 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 cavity 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 cavity.

[0086] Method 1 and method 2 can be used in combination or one at a time.

[0087] Third aspect: Try to increase 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 insulating path between the positive and negative electrodes will be relatively short, and the insulating property is likely to be damaged in a relatively short time.

[0091] In response to this, the present disclosure proposes that an insulator (i.e., an insulating spacer) with a specific structure that can increase the insulating path length can be used to increase the insulating 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 insulating 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 insulating path between the positive and negative electrodes, that is, using a two - phase insulating support plate.

[0095] Specifically, 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, and the second insulating support plate is connected to the support component for connecting the negative electrode plate. The first insulating support plate and the second insulating support plate are also connected by an insulating material. The insulating material connecting the first insulating support plate and the second insulating support plate can be an insulator.

[0096] Fig. 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 Fig. 9As shown, the orange plate in the sealed cavity corresponds to the second insulating support plate mentioned above, which is responsible for supporting the red negative electrode group. The light blue plate in the sealed cavity corresponds to the first insulating support plate mentioned above, which is responsible for supporting the blue positive electrode group. The supporting structure inside the electrode group is also represented by the same color. The orange plate and the light blue plate 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 routine operation to use insulating materials as support on the edge of the electrostatic filter. Since it is irrelevant to the invention point of the present disclosure, it will not be further expanded. What is emphasized here is that two independent insulating support plates are used to support the positive and negative electrode groups respectively, and then the two insulating support plates are fixed to each other by insulators, which can achieve a good effect of increasing the insulation path.

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

[0100] Fig.10 The electrostatic filtration device shown is an example of combining all three aspects to reduce the degree of contamination of the insulating support components between the positive and negative electrodes. Fig.10 As shown, the negative electrodes and outer frames at the edges of both sides of the electrostatic filter device can be used to construct a sealed cavity. An annular channel is set at the perforation position of the negative electrode involved in forming the sealed cavity to absorb pollutants entering from the perforation position. Then, the length of the insulation path between the positive and negative electrodes in the sealed cavity is increased by means of a two-phase support structure and an insulator, so as to maximize the short circuit between the positive and negative electrodes caused by pollutants.

[0101] Fig.10 Two situations are given: the electrostatic filter device completes the sealing cavity independently, and the electrostatic filter device and its external frame complete the sealing cavity together. Specifically, Fig.10 The left side view shows that the sealed cavity is completed independently by the electrostatic filtration device. Fig.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 can ensure that the support structure between the positive and negative electrodes of the electrostatic filter is not contaminated by pollutants to a great extent through sealing, adsorption, and extending the insulation path, thereby greatly reducing the leakage current between the positive and negative electrodes, which can greatly reduce the power consumption of the electrostatic filter, reduce the power supply requirements of the equipment, and save energy and reduce emissions. At the same time, for high-resistivity electrode electrostatic filters, the leakage between the positive and negative electrodes will directly affect the purification efficiency. The use of the present disclosure can greatly extend the service life of this type of electrostatic filter.

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

[0104] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An electrostatic filtration device, comprising: A positive electrode plate group and a 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, The sealed cavity is provided with a second electrode plate having a different polarity from the first electrode plate and / or a second supporting component connected to the second electrode plate, 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 by 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 filtering 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 on the sealed cavity for the second supporting member to pass through is arranged near the center of the sealed cavity, or arranged on the side away from the windward surface on both sides of the center of the sealed cavity.

6. The electrostatic filtration device according to claim 1, wherein: The sealed cavity is provided with an air inlet passage, and the air inlet passage has a predetermined length in the direction of the plate spacing. The second supporting component passes through the air inlet passage, and the air inlet passage is a hollow structure. The gap between the air inlet passage and the portion of the second supporting component located in the air inlet passage 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 the 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 also 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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