Electrostatic dust collection electrode with high thermal conductivity and high voltage resistance as well as preparation method and application of electrostatic dust collection electrode

Abstract

The invention relates to the technical field of dust removal, in particular to a high-thermal-conductivity and high-voltage-resistance electrostatic dust removal electrode and a preparation method and application thereof. The electrostatic dust collection electrode comprises an electrode body and an insulating layer arranged on the surface of the electrode body, the preparation raw materials of the insulating layer comprise a polymer-based insulating material and a heat-conducting pressure-resistant filler; the heat-conducting pressure-resistant filler comprises at least one of silicon carbide and boron nitride. The insulating layer is arranged on the surface of the electrostatic dust collection electrode, the problem of surface arcing of the electrostatic dust collection high-voltage electrode is solved, the insulating layer contains the heat-conducting pressure-resistant filler, the heat-conducting efficiency of the insulating layer is improved, surface heat accumulation is reduced, the risk of aging failure of the insulating layer is reduced, and the service life of the insulating layer is prolonged; and meanwhile, the heat-conducting pressure-resistant filler also has relatively high electric breakdown resistance, so that the voltage-resistant strength of the insulating layer is improved, and the long-term use purification efficiency of the electrostatic dust collection electrode is further improved.

Description

Technical Field

[0001] This invention relates to the field of dust removal technology, and in particular to an electrostatic dust removal electrode with high thermal conductivity and high pressure resistance, its preparation method, and its application. Background Technology

[0002] Electrostatic dust removal in the air conditioning field works by applying high voltage to electrodes to ionize the air. The generated electrons combine with the dust (charging the dust), thus collecting the dust at the dust collection end.

[0003] In traditional electrostatic dust removal modules used in air conditioners, the surfaces of the high-voltage electrodes are exposed. When voltage is applied, electric arcs may be generated on these surfaces, accompanied by a "crackling" sound. Therefore, some existing technologies insulate the electrodes with films (such as ABS, PE, PP, PVC, etc.). However, adding an insulating layer reduces the thermal conductivity of the electrode surface, causing heat to accumulate and leading to aging and failure of the insulating layer over long-term use. Furthermore, traditional insulating layers are made of simple polymer-based insulating materials, which have relatively low insulation strength, limiting their performance in high-voltage applications.

[0004] Therefore, how to reduce the surface heat accumulation of electrostatic precipitator electrodes and extend their service life remains a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0006] Therefore, one of the objectives of this invention is to provide an electrostatic dust removal electrode that, while being insulated, can simultaneously conduct heat, reducing heat accumulation on the surface; it also possesses excellent voltage resistance, thereby extending the electrode's service life.

[0007] The second objective of this invention is to provide a method for preparing the above-mentioned electrostatic dust removal electrode.

[0008] The third objective of this invention is to propose an application of the above-mentioned electrostatic dust removal electrode in gas dust removal.

[0009] The fourth objective of this invention is to provide an electrostatic precipitator containing the aforementioned electrostatic dust removal electrodes.

[0010] The fifth objective of this invention is to provide an air conditioner containing the aforementioned electrostatic precipitator.

[0011] According to a first aspect of the present invention, the electrostatic dust removal electrode includes an electrode body and an insulating layer disposed on the surface of the electrode body; the raw materials for preparing the insulating layer include a polymer-based insulating material and a thermally conductive and pressure-resistant filler; the thermally conductive and pressure-resistant filler includes at least one of silicon carbide and boron nitride.

[0012] The electrostatic precipitator electrode according to embodiments of the present invention has at least the following beneficial effects: The electrostatic precipitator electrode of the present invention has an insulating layer on the surface of the electrode body, which solves the problem of arcing on the surface of the high voltage electrode of electrostatic precipitator. Moreover, the insulating layer contains a thermally conductive and pressure-resistant filler. Since the thermally conductive and pressure-resistant filler has high thermal conductivity, it improves the thermal conductivity efficiency of the insulating layer, which can quickly conduct away the heat generated on the electrode surface, reduce the heat accumulation on the surface, thereby reducing the risk of aging and failure of the insulating layer and extending the service life of the insulating layer. At the same time, the thermally conductive and pressure-resistant filler also has high resistance to electrical breakdown, which improves the voltage resistance of the insulating layer, thereby improving the long-term purification efficiency of the electrostatic precipitator electrode.

[0013] According to some embodiments of the present invention, the polymer-based insulating material includes at least one of polyethylene, polypropylene, ABS, polyethylene terephthalate, polycarbonate, and polyvinyl chloride.

[0014] According to some embodiments of the present invention, the particle size of the thermally conductive and pressure-resistant filler includes at least one of 5-100 nm, 100-1000 nm and 1-20 μm.

[0015] According to some embodiments of the present invention, the particle size of the thermally conductive and pressure-resistant filler is 5-100 nm.

[0016] According to some embodiments of the present invention, the particle size of the thermally conductive and pressure-resistant filler is 100-1000 nm.

[0017] According to some embodiments of the present invention, the particle size of the thermally conductive and pressure-resistant filler is 1-20 μm.

[0018] According to some embodiments of the present invention, the raw materials for preparing the insulating layer include 100 parts of the polymer-based insulating material and 0.1-50 parts of the thermally conductive and pressure-resistant filler, based on parts by weight.

[0019] According to some embodiments of the present invention, the raw materials for preparing the insulating layer include 100 parts of polymer-based insulating material and 1-50 parts of thermally conductive and pressure-resistant filler, based on parts by weight.

[0020] According to some embodiments of the present invention, the raw materials for preparing the insulating layer include 100 parts of polymer-based insulating material and 5-40 parts of thermally conductive and pressure-resistant filler, based on parts by weight.

[0021] According to some embodiments of the present invention, the raw materials for preparing the insulating layer include 100 parts of polymer-based insulating material and 5-20 parts of thermally conductive and pressure-resistant filler, based on parts by weight.

[0022] According to some embodiments of the present invention, the thickness of the insulating layer is 50-100 μm.

[0023] According to some embodiments of the present invention, the insulating layer is an insulating film layer.

[0024] According to some embodiments of the present invention, the thermally conductive and pressure-resistant filler is a coupling agent modified thermally conductive and pressure-resistant filler.

[0025] According to some embodiments of the present invention, the coupling agent includes at least one of silane coupling agents, titanate coupling agents, and aluminate coupling agents.

[0026] According to some embodiments of the present invention, the coupling agent is a silane coupling agent, and the silane coupling agent includes at least one of KH550, KH560 and KH570.

[0027] According to some embodiments of the present invention, the electrode body is a stainless steel electrode.

[0028] According to a second aspect of the present invention, a method for preparing the electrostatic dust removal electrode of the first aspect of the present invention is provided, comprising the following steps:

[0029] The polymer-based insulating material and the thermally conductive and pressure-resistant filler are mixed, melt-extruded, and then cast into a film. The film is then adhered to the surface of the electrode body to form an insulating layer, thus obtaining an electrostatic dust removal electrode.

[0030] The method for preparing the electrostatic dust removal electrode according to the embodiments of the present invention has at least the following beneficial effects: the method for preparing the electrostatic dust removal electrode of the present invention is simple, does not require expensive equipment and harsh process conditions, has low manufacturing cost, and is easy to realize industrial production.

[0031] According to some embodiments of the present invention, the temperature of the melt extrusion is 180-240°C.

[0032] According to some embodiments of the present invention, the temperature for casting the film is 200-240°C.

[0033] According to some embodiments of the present invention, the method for preparing the electrostatic precipitator electrode further includes the following step of modifying the thermally conductive and pressure-resistant filler:

[0034] The coupling agent, thermally conductive and pressure-resistant filler, and solvent are mixed and reacted. The solvent is then removed to obtain the coupling agent-modified thermally conductive and pressure-resistant filler.

[0035] According to some embodiments of the present invention, the solvent includes ethanol.

[0036] According to some embodiments of the present invention, the solvent removal method is drying.

[0037] According to some embodiments of the present invention, the drying temperature is 60-80°C.

[0038] According to a third aspect of the present invention, the application of the electrostatic dust removal electrode of the first aspect of the present invention in gas dust removal is provided.

[0039] Applying electrostatic dust removal electrodes to gas dust removal has at least the following beneficial effects: it avoids arcing on the electrode surface during the dust removal process, reduces heat accumulation on the electrode surface, and at the same time improves the voltage resistance of the insulation layer, maintaining high gas purification and dust removal efficiency even after long-term use.

[0040] According to some embodiments of the present invention, the application is specifically the application of the electrostatic dust removal electrode in air dust removal in the air conditioning field.

[0041] According to a fourth aspect of the present invention, an electrostatic precipitator is provided, the electrostatic precipitator comprising the electrostatic precipitator electrode of the first aspect of the present invention described above.

[0042] The electrostatic precipitator according to embodiments of the present invention has at least the following beneficial effects: Because the electrostatic precipitator of the present invention uses the electrostatic precipitator electrode of the present invention, it possesses all the beneficial effects of the electrostatic precipitator electrode of the present invention. Specifically, the electrostatic precipitator of the present invention uses an electrostatic precipitator electrode comprising an electrode body and an insulating layer disposed on the surface of the electrode body. The insulating layer is prepared from polymer-based insulating materials and thermally conductive and pressure-resistant fillers. The thermally conductive and pressure-resistant fillers enable rapid heat conduction of the insulating layer, transferring the heat generated by the current to the air at a relatively fast speed, reducing heat accumulation on the surface, and extending the service life of the insulating layer. Simultaneously, the thermally conductive and pressure-resistant fillers also have excellent voltage resistance, which can improve the voltage resistance strength of the insulating layer, thereby improving the long-term purification efficiency of the electrostatic precipitator electrode and extending the service life of the electrostatic precipitator.

[0043] According to a fifth aspect of the present invention, an air conditioner is provided, the air conditioner comprising the electrostatic precipitator of the fourth aspect of the present invention described above.

[0044] The air conditioner according to the embodiments of the present invention has at least the following beneficial effects: the air conditioner of the present invention, by using the electrostatic precipitator of the present invention, possesses all the beneficial effects of the electrostatic precipitator of the present invention.

[0045] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the electrostatic dust removal electrode of the present invention;

[0047] Figure 2This is a schematic diagram of the electrostatic dust removal device used in the purification efficiency test of Test Example 3 of the present invention.

[0048] Reference numerals: 100, electrostatic precipitator electrode; 110, electrode body; 120, insulating layer; 200, electrostatic precipitator device; 210, high voltage line; 220, neutral line. Detailed Implementation

[0049] The embodiments of the present invention are described in detail below. The described embodiments are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0050] In some embodiments of the present invention, the present invention provides an electrostatic dust removal electrode, which includes an electrode body and an insulating layer disposed on the surface of the electrode body; the raw materials for preparing the insulating layer include a polymer-based insulating material and a thermally conductive and pressure-resistant filler; the thermally conductive and pressure-resistant filler includes at least one of silicon carbide and boron nitride.

[0051] refer to Figure 1 As shown, it can be understood that the electrostatic precipitator electrode 100 of the present invention, by providing an insulating layer 120 on the surface of the electrode body 110, can solve the problem of arcing on the surface of the high-voltage electrode in electrostatic precipitators. Adding a thermally conductive and pressure-resistant filler to the insulating layer 120, on the basis of insulation, simultaneously enables rapid heat conduction of the insulating layer 120, transferring the heat generated by the current to the air at a faster rate, reducing heat accumulation on the surface, and extending the service life of the insulating layer 120. At the same time, using a thermally conductive and pressure-resistant filler can also improve the voltage withstand strength of the insulating layer 120, thereby improving the long-term purification efficiency of the electrostatic precipitator electrode 100.

[0052] In some embodiments of the present invention, the polymer-based insulating material includes at least one of polyethylene, polypropylene, ABS, polyethylene terephthalate, polycarbonate, and polyvinyl chloride.

[0053] In some embodiments of the present invention, the particle size of the thermally conductive and pressure-resistant filler includes at least one of 5-100 nm, 100-1000 nm and 1-20 μm.

[0054] In some embodiments of the present invention, the particle size of the thermally conductive and pressure-resistant filler is 5-100 nm.

[0055] In some embodiments of the present invention, the particle size of the thermally conductive and pressure-resistant filler is 100-1000 nm.

[0056] In some embodiments of the present invention, the particle size of the thermally conductive and pressure-resistant filler is 1-20 μm.

[0057] It is understood that the present invention can achieve good thermal conductivity and voltage resistance by using thermally conductive and pressure-resistant fillers of three different particle sizes: large particle size (1-20μm), medium particle size (100-1000nm), and small particle size (5-100nm), or by using any combination of two of the above three different particle sizes, or by using a combination of the above three particle sizes.

[0058] Specifically, small-particle-size thermally conductive and pressure-resistant fillers are difficult to form continuous structures due to their small particle size. Compared to small-particle-size thermally conductive and pressure-resistant fillers, large-particle-size thermally conductive and pressure-resistant fillers are more likely to form continuous structures within polymer-based insulating materials, thereby achieving thermal conductivity and breakdown resistance; however, excessively large particle sizes can lead to difficulties in material processing and easily cause uneven distribution of the thermally conductive and pressure-resistant filler within the material, potentially even forming defective structures. Therefore, this invention preferably uses medium-particle-size thermally conductive and pressure-resistant fillers because they can form continuous structures, have good filling effects on the material, and relatively good processing performance, making them less prone to defects caused by uneven distribution.

[0059] In some embodiments of the present invention, the raw materials for preparing the insulating layer include 100 parts of polymer-based insulating material and 0.1-50 parts of thermally conductive and pressure-resistant filler, based on parts by weight.

[0060] In some embodiments of the present invention, the raw materials for preparing the insulating layer include 100 parts of polymer-based insulating material and 1-50 parts of thermally conductive and pressure-resistant filler, based on parts by weight.

[0061] In some embodiments of the present invention, the raw materials for preparing the insulating layer include 100 parts of polymer-based insulating material and 5-40 parts of thermally conductive and pressure-resistant filler, based on parts by weight.

[0062] In some embodiments of the present invention, the raw materials for preparing the insulating layer include 100 parts of polymer-based insulating material and 5-20 parts of thermally conductive and pressure-resistant filler, based on parts by weight.

[0063] It is understandable that the amount of thermally conductive and pressure-resistant filler used affects the performance of the insulation layer. For example, if the amount of thermally conductive and pressure-resistant filler is too small, it cannot achieve the expected thermal conductivity / breakdown resistance effect. If the amount of thermally conductive and pressure-resistant filler is too large, the effect is not significantly improved, and it will make the insulation layer difficult to process and form.

[0064] In some embodiments of the present invention, the thickness of the insulating layer is 50-100 μm.

[0065] In some embodiments of the present invention, the insulating layer is an insulating film layer.

[0066] It is understood that the insulating layer can be made of polyethylene, polypropylene, ABS, polyethylene terephthalate, polycarbonate, and polyvinyl chloride as the main materials, mixed with thermally conductive and pressure-resistant fillers to form a thin film. The film is then adhered to the surface of the electrode body as an insulating film layer. The insulating film layer is easy to replace; if it ages, the old insulating film layer can be peeled off and a new one applied, allowing for continued use after replacement.

[0067] In some embodiments of the present invention, the thermally conductive and pressure-resistant filler is a coupling agent modified thermally conductive and pressure-resistant filler.

[0068] In some embodiments of the present invention, the coupling agent includes at least one of silane coupling agents, titanate coupling agents, and aluminate coupling agents.

[0069] In some embodiments of the present invention, the coupling agent is a silane coupling agent, and the silane coupling agent includes at least one of KH550, KH560 and KH570.

[0070] It is understandable that after the thermally conductive and pressure-resistant filler is surface modified with a silane coupling agent, the interfacial interaction between the thermally conductive and pressure-resistant filler and the main material can be enhanced, resulting in more uniform dispersion, tighter bonding, and higher interfacial strength.

[0071] In some embodiments of the present invention, the electrode body is a stainless steel electrode.

[0072] In other embodiments of the present invention, a method for preparing an electrostatic dust removal electrode is provided, comprising the following steps:

[0073] A polymer-based insulating material and a thermally conductive and pressure-resistant filler are mixed, melt-extruded, and then cast into a film. The film is then adhered to the surface of the electrode body to form an insulating layer, thus obtaining an electrostatic dust removal electrode.

[0074] It is understood that the insulating layer on the electrostatic dust removal electrode of the present invention is formed by mixing thermally conductive and pressure-resistant filler with the main material, processing it into a thin film, and then pasting the film onto the surface of the electrode body as an insulating film layer. The preparation method of the electrostatic dust removal electrode of the present invention is simple, requires no expensive equipment or harsh process conditions, has low manufacturing cost, and is easy to achieve industrial production.

[0075] It is understood that the film can be adhered to the surface of the electrode body by providing an adhesive on the surface of the film. The adhesive includes, but is not limited to, pressure-sensitive adhesive, which adheres to the surface of the stainless steel electrode.

[0076] In some embodiments of the present invention, the preparation process of the pressure-sensitive adhesive on the film surface is as follows: 10 parts by mass of ethyl acetate diluent are added to 100 parts by mass of the pressure-sensitive adhesive, and the coating is applied to the surface of the film using a coating machine. The coating thickness is about 5 micrometers. The film is then placed in a forced-air drying oven at 90 degrees Celsius for 3 minutes to dry off excess diluent, thus obtaining the final product.

[0077] In some embodiments of the present invention, the temperature of the melt extrusion is 180-240°C.

[0078] In some embodiments of the present invention, the temperature of the melt extrusion is 200-220°C.

[0079] In some embodiments of the present invention, the temperature for casting the film is 200-240°C.

[0080] In some embodiments of the present invention, the temperature for casting the film is 210-230°C.

[0081] In some embodiments of the present invention, the method for preparing the electrostatic dust removal electrode further includes the step of modifying the thermally conductive and pressure-resistant filler:

[0082] The coupling agent, thermally conductive and pressure-resistant filler, and solvent are mixed, and the solvent is removed to obtain the coupling agent-modified thermally conductive and pressure-resistant filler.

[0083] It is understandable that by modifying the surface of the thermally conductive and pressure-resistant filler, the filler can be more evenly dispersed within the main material, more tightly bonded, and have higher interfacial strength.

[0084] In some embodiments of the present invention, the solvent includes ethanol.

[0085] In some embodiments of the present invention, the solvent removal method is drying.

[0086] In some embodiments of the present invention, the drying temperature is 60-80°C.

[0087] In other embodiments of the present invention, the application of the electrostatic dust removal electrode of the present invention in gas dust removal is provided, specifically in the application of air purification in the field of air conditioning.

[0088] It is understood that the electrostatic dust removal electrode of the present invention avoids arcing on the electrode surface during gas dust removal, reduces heat accumulation on the electrode surface, and still has high gas purification and dust removal efficiency after long-term use.

[0089] In other embodiments of the present invention, an electrostatic precipitator is provided, the electrostatic precipitator comprising the electrostatic precipitator electrode of the present invention.

[0090] It is understood that the electrostatic precipitator of the present invention, by using the electrostatic precipitator electrode of the present invention, possesses all the beneficial effects of the electrostatic precipitator electrode of the present invention. Specifically, the electrostatic precipitator of the present invention uses an electrostatic precipitator electrode comprising an electrode body and an insulating layer disposed on the surface of the electrode body. The insulating layer is prepared from polymer-based insulating materials and thermally conductive and pressure-resistant fillers. The thermally conductive and pressure-resistant fillers enable rapid heat conduction of the insulating layer, transferring the heat generated by the current to the air at a relatively fast speed, reducing heat accumulation on the surface, and extending the service life of the insulating layer. At the same time, the thermally conductive and pressure-resistant fillers also have excellent voltage resistance, which can improve the voltage resistance strength of the insulating layer, thereby improving the long-term purification efficiency of the electrostatic precipitator electrode and extending the service life of the electrostatic precipitator.

[0091] In other embodiments of the present invention, an air conditioner is provided that includes the electrostatic precipitator of the present invention.

[0092] It is understood that the air conditioner of the present invention, by using the electrostatic precipitator of the present invention, possesses all the beneficial effects of the electrostatic precipitator of the present invention.

[0093] The present invention will be further described in detail below through specific embodiments. Unless otherwise specified, all raw materials, reagents, and apparatus used herein are available from conventional commercial sources. Unless otherwise specified, the test or experimental methods are conventional methods in the art.

[0094] Example 1

[0095] This embodiment prepares an electrostatic dust removal electrode, and the specific preparation process is as follows:

[0096] Dissolve 5 parts of silane coupling agent KH560 in 20 mL of ethanol, then add 100 parts of SiC particles, mix evenly using a high-speed mixer, and dry at 60 °C to obtain modified SiC particles.

[0097] 100 parts of polypropylene (PP) and 5 parts of modified SiC granules were mixed evenly in a mixer, then fed into a twin-screw extruder, extruded into strips, cooled and granulated to obtain PP / SiC masterbatch; wherein, the extruder temperature was 200℃ and the screw speed was 20rpm.

[0098] PP / SiC masterbatch is added to a single-screw extruder and cast into a film to obtain a PP / SiC insulating film; wherein the extruder temperature is 220℃ and the screw speed is 20rpm;

[0099] Add 10 parts of ethyl acetate diluent to 100 parts of acrylic pressure-sensitive adhesive, and coat it onto one surface of PP / SiC insulating film using a coating machine. The coating thickness is about 5 μm. Place it in a forced-air oven at 90°C and dry it with hot air for 3 minutes. After drying off the excess diluent, pressure-sensitive adhesive is obtained on one surface of PP / SiC insulating film.

[0100] One side of a PP / SiC insulating film with pressure-sensitive adhesive is adhered to the surface of a stainless steel electrode to form an insulating layer, thus obtaining an electrostatic dust removal electrode.

[0101] In this embodiment, the SiC particles have a particle size of 5-100 nm; the PP / SiC insulating film has a thickness of approximately 50 μm.

[0102] The stainless steel electrode in this embodiment has the following dimensions: 15cm long, 1.5cm wide, and 0.5cm thick.

[0103] Example 2

[0104] The difference between this embodiment and Example 1 is that the particle size of the modified SiC particles in this embodiment is 100-1000 nm, while the other preparation conditions are the same as in Example 1.

[0105] Example 3

[0106] The difference between this embodiment and Example 1 is that the particle size of the modified SiC particles in this embodiment is 1-20 μm, while the other preparation conditions are the same as in Example 1.

[0107] Example 4

[0108] The difference between this embodiment and Embodiment 1 is that the amount of modified SiC particles added in this embodiment is 10 parts, while the other preparation conditions are the same as in Embodiment 1.

[0109] Example 5

[0110] The difference between this embodiment and Embodiment 2 is that the amount of modified SiC particles added in this embodiment is 10 parts, while the other preparation conditions are the same as in Embodiment 1.

[0111] Example 6

[0112] The difference between this embodiment and Example 3 is that the amount of modified SiC particles added in this embodiment is 10 parts, while the other preparation conditions are the same as in Example 1.

[0113] Example 7

[0114] The difference between this embodiment and Embodiment 1 is that the amount of modified SiC particles added in this embodiment is 15 parts, while the other preparation conditions are the same as in Embodiment 1.

[0115] Example 8

[0116] The difference between this embodiment and Embodiment 2 is that the amount of modified SiC particles added in this embodiment is 15 parts, while the other preparation conditions are the same as in Embodiment 1.

[0117] Example 9

[0118] The difference between this embodiment and Example 3 is that the amount of modified SiC particles added in this embodiment is 15 parts, while the other preparation conditions are the same as in Example 1.

[0119] Example 10

[0120] The difference between this embodiment and Example 1 is that the amount of modified SiC particles added in this embodiment is 20 parts, while the other preparation conditions are the same as in Example 1.

[0121] Example 11

[0122] The difference between this embodiment and Embodiment 2 is that the amount of modified SiC particles added in this embodiment is 20 parts, while the other preparation conditions are the same as in Embodiment 1.

[0123] Example 12

[0124] The difference between this embodiment and Example 3 is that the amount of modified SiC particles added in this embodiment is 20 parts, while the other preparation conditions are the same as in Example 1.

[0125] Examples 13-24

[0126] The difference from Examples 1-12 is that the SiC particles in Examples 13-24 were not modified, while the other preparation conditions were the same as those in Examples 1-12.

[0127] It is understood that, compared with Example 1, the SiC particles in Example 13 were not modified, and the other preparation conditions were the same as those in Example 1; similarly, compared with Example 12, the SiC particles in Example 24 were not modified, and the other preparation conditions were the same as those in Example 12.

[0128] Comparative Example 1

[0129] The difference from Example 1 is that SiC particles were not added in Comparative Example 1. The specific preparation process is as follows:

[0130] 100 parts of PP were added to a twin-screw extruder, extruded into strips, cooled and pelletized to obtain PP masterbatch; wherein the extruder temperature was 200℃ and the screw speed was 20rpm;

[0131] PP masterbatch is added to a single-screw extruder and cast into a film to obtain a PP insulating film; wherein the extruder temperature is 220℃ and the screw speed is 20rpm;

[0132] Add 10 parts of ethyl acetate diluent to 100 parts of acrylic pressure-sensitive adhesive, and coat it onto one surface of PP insulating film using a coating machine. The coating thickness is about 5 μm. Place it in a forced-air oven at 90°C and dry it with hot air for 3 minutes. After drying off the excess diluent, pressure-sensitive adhesive is obtained on one surface of PP insulating film.

[0133] One side of a PP insulating film with pressure-sensitive adhesive is adhered to the surface of a stainless steel electrode to form an insulating layer, thus obtaining an electrostatic dust removal electrode.

[0134] The thickness of the PP insulating film in this comparative example is approximately 50 μm.

[0135] The stainless steel electrode in this comparative example is 15cm long, 1.5cm wide, and 0.5cm thick.

[0136] Test Example 1: Thermal Conductivity Test of Insulating Film

[0137] The thermal conductivity of the insulating films prepared in Examples 1-24 was tested, and the test results are shown in Tables 1 and 2.

[0138] Table 1

[0139]

[0140] Table 2

[0141]

[0142] Furthermore, the thermal conductivity of the insulating film prepared in Comparative Example 1 was tested using the same method as in the test examples, and the measured thermal conductivity was 0.23 W / m·K.

[0143] According to the thermal conductivity test results in Tables 1 and 2 and Comparative Example 1, the insulating film with added thermally conductive and pressure-resistant filler (SiC) has a significantly higher thermal conductivity than the insulating film without added thermally conductive and pressure-resistant filler. Furthermore, compared to unmodified silicon carbide, surface modification of silicon carbide improves its interfacial compatibility with the host material (PP) and ensures sufficient dispersion, further enhancing the thermal conductivity of the insulating film.

[0144] Test Example 2: Voltage Withstand Performance Test of Insulating Film

[0145] A voltage of 10 kV and a DC high-voltage negative current of 1 A were applied to the electrostatic dust removal electrodes prepared in Examples 1-24. After 15 minutes, the voltage and current were removed, and the electrodes were allowed to stand at room temperature for 15 minutes, which constituted one cycle. After 100 cycles of accelerated electrical aging test, the withstand voltage strength of the insulating film on the electrode surface was tested. The test results are shown in Tables 3 and 4.

[0146] Table 3

[0147]

[0148] Table 4

[0149]

[0150] Furthermore, the voltage withstand performance of the insulating film prepared in Comparative Example 1 was tested using the same method as in the test examples, and the breakdown voltage was measured to be 20.2 kV / mm.

[0151] According to the voltage withstand performance test results in Tables 3 and 4 and Comparative Example 1, the insulation film with added thermally conductive and voltage-resistant filler (SiC) has a significantly higher breakdown voltage than the insulation film without added thermally conductive and voltage-resistant filler. Furthermore, compared to unmodified silicon carbide, surface modification of silicon carbide improves its interfacial compatibility with the host material (PP) and ensures sufficient dispersion, further increasing the breakdown voltage of the insulation film.

[0152] Test Example 3: Purification Efficiency Test of Electrostatic Precipitator Electrode

[0153] The electrostatic dust removal electrodes prepared in Examples 1-24 were assembled into an electrostatic dust removal device, and the purification efficiency was tested.

[0154] refer to Figure 2 As shown, six electrostatic precipitator electrodes 100 are arranged in parallel, with a spacing of 1.5 cm between each electrode, and fixed at both ends with insulating plastic. The electrostatic precipitator electrodes 100 are alternately connected to a high-voltage wire 210 and a neutral wire 220 to form an electrostatic precipitator device 200. A DC high-voltage negative current of 10 kV and 2 mA is applied to the electrostatic precipitator device to test the purification efficiency of the workpiece.

[0155] Specifically, the CADR test method is as follows: The electrostatic precipitator is installed in a duct with a flow rate of 250 cmf, and the purification efficiency (CADR value) of the electrostatic precipitator for smoke particles is tested according to ANSI AHAMAC-1-2015. The test results are shown in Tables 5 and 6. Here, "after aging" refers to the electrostatic precipitator electrodes after undergoing the accelerated electrical aging test in Test Example 2.

[0156] Table 5

[0157]

[0158]

[0159] Table 6

[0160]

[0161] Furthermore, the electrostatic precipitator based on the electrostatic precipitator electrode prepared in Comparative Example 1 was tested using the same method as in the test embodiment. The CADR value before aging was 207, and the CADR value after aging was 176.

[0162] According to the purification efficiency test results in Tables 5 and 6 and Comparative Example 1, the electrostatic precipitator electrode with added thermally conductive and pressure-resistant filler (SiC) showed a smaller decrease in CADR value; while the electrostatic precipitator electrode without added thermally conductive and pressure-resistant filler (SiC) showed a significant decrease in CADR value. Therefore, the present invention can effectively improve the long-term purification efficiency of electrostatic precipitator electrodes.

[0163] Example 25

[0164] An electrostatic precipitator containing the electrostatic precipitator electrode of Example 11.

[0165] The electrostatic precipitator prepared in this embodiment, due to the use of the electrostatic precipitator electrode of the present invention, can avoid arcing on the electrode surface during the dust removal process, and still has high gas purification and dust removal efficiency after long-term use.

[0166] Example 26

[0167] An air conditioner that includes the electrostatic precipitator of Example 25.

[0168] The electrostatic precipitator prepared in this embodiment still has high gas purification and dust removal efficiency after long-term use because it uses the electrostatic precipitator of the present invention.

[0169] In the description of this specification, references to terms such as "some embodiments," "examples," or "specific embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0170] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electrostatic dust removal electrode, characterized in that, The electrostatic dust removal electrode includes an electrode body and an insulating layer disposed on the surface of the electrode body; the raw materials for preparing the insulating layer include a polymer-based insulating material and a thermally conductive and pressure-resistant filler; the thermally conductive and pressure-resistant filler includes at least one of silicon carbide and boron nitride.

2. The electrostatic dust removal electrode according to claim 1, characterized in that, The polymer-based insulating material includes at least one of polyethylene, polypropylene, ABS, polyethylene terephthalate, polycarbonate, and polyvinyl chloride.

3. The electrostatic dust removal electrode according to claim 1, characterized in that, The particle size of the thermally conductive and pressure-resistant filler includes at least one of 5-100 nm, 100-1000 nm and 1-20 μm.

4. The electrostatic dust removal electrode according to claim 1, characterized in that, The raw materials for preparing the insulating layer, by weight, include 100 parts of the polymer-based insulating material and 0.1-50 parts of the thermally conductive and pressure-resistant filler.

5. The electrostatic dust removal electrode according to claim 1, characterized in that, The thickness of the insulating layer is 50-100 μm.

6. The electrostatic dust removal electrode according to claim 1, characterized in that, The insulating layer is an insulating film layer.

7. The electrostatic dust removal electrode according to claim 1, characterized in that, The thermally conductive and pressure-resistant filler is a coupling agent-modified thermally conductive and pressure-resistant filler.

8. The electrostatic dust removal electrode according to claim 7, characterized in that, The coupling agent includes at least one of silane coupling agents, titanate coupling agents, and aluminate coupling agents.

9. The method for preparing the electrostatic dust removal electrode according to any one of claims 1 to 8, characterized in that, Includes the following steps: The polymer-based insulating material and the thermally conductive and pressure-resistant filler are mixed, melt-extruded, and then cast into a film. The film is then adhered to the surface of the electrode body to form an insulating layer, thus obtaining an electrostatic dust removal electrode.

10. The preparation method according to claim 9, characterized in that, The temperature of the melt extrusion is 180-240°C; and / or the temperature of the casting film is 200-240°C.

11. The preparation method according to claim 9, characterized in that, It also includes the following steps for modifying the thermally conductive and pressure-resistant filler: The coupling agent, thermally conductive and pressure-resistant filler, and solvent are mixed and reacted. The solvent is then removed to obtain the coupling agent-modified thermally conductive and pressure-resistant filler.

12. The application of the electrostatic dust removal electrode according to any one of claims 1 to 8 in gas dust removal.

13. An electrostatic precipitator, characterized in that, The electrostatic precipitator includes the electrostatic precipitator electrode as described in any one of claims 1 to 8.

14. An air conditioner, characterized in that, The air conditioner includes the electrostatic precipitator as described in claim 13.

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