High humidity resistant micro electrostatic cleaning device

Abstract

The present invention discloses a micro electrostatic cleaning device that can withstand high humidity, which is equipped with an ionization module, a micro electrostatic filter and a power supply module. The first electrode band and the second electrode band are respectively inserted into the insulating dielectric material at both ends of the longitudinal direction of the carbon electrode of the filter core, and then sealed with a sealant, and the joints of each lead wire are sealed by glue potting, so as to realize the complete sealing of the filter core. The connection between the power supply module and the electrode band, and the connection between the electrode contact piece and the external power supply are completely sealed by the structure setting. At the same time, a current limiting protection circuit is set, which monitors the operating current in real time, and when the instantaneous change of the operating current exceeds the threshold, it performs current limiting protection. According to the present invention, in a humid environment, it can improve the stability of operation, guarantee the working efficiency and dust-holding capacity, and avoid phenomena such as electric leakage and arc discharge.

Description

[Technical field]

[0001] The present application is in the field of air cleaning technology, and in particular relates to a miniature electrostatic cleaning device that can withstand high humidity. [Background technology]

[0002] Micro electrostatic precipitators are a technology that uses a strong electric field with a dielectric material as a carrier to clean the air. The dielectric material wraps the electrode sheet to form a honeycomb-shaped hollow microporous passage, forming a strong electric field within the passage, which exerts a large attractive force on the charged particles moving through the air, and at the same time, it can collect bacteria, viruses and other microorganisms attached to the particles and kill them with the strong electric field. Micro electrostatic technology not only efficiently removes PM1.0, PM2.5, and PM10, but also effectively removes microorganisms such as white staphylococcus, natural bacteria, H1N1A influenza virus, and SARS-CoV-2 novel coronavirus, achieving efficient and universal sterilization and disinfection. In addition, it has the characteristics of low resistance, no consumables, safe and harmless, coexistence with humans and machines, and no generation of harmful substances (such as ozone), so it is widely used in cleaning and disinfection products for human habitation.

[0003] Micro-electrostatic technology includes an ionization area (ionization module) and a dust collection area (micro-electrostatic filter), both of which are powered by a high-voltage power supply. The power supply can be built into the ionization module and the micro-electrostatic filter, or placed outside the ionization module and the micro-electrostatic filter and connected by wires. According to the two typical forms of the ionization module, micro-electrostatic technology can be divided into charged micro-electrostatic technology, in which the ionizer emits an electric charge, and electric field micro-electrostatic technology, which is composed of an electric field module composed of a metal electrode plate with a needle tip. The former is suitable for small spaces with indoor circulation, while the latter is suitable for places where outdoor fresh air is introduced and large and medium-sized spaces with complex airflow configurations.

[0004] In high humidity environments, such as those with a relative humidity higher than 80%, micro electrostatic air cleaners often cannot operate stably and continuously, and their efficiency and dust-holding capacity will rapidly decrease with the increase in humidity. In addition, in the case of high humidity, if the dielectric of the micro electrostatic filter in the cleaner is damaged or the leakage path is increased due to unreasonable structural design and sealing, the micro electrostatic filter will be very prone to leakage current and arc discharge, causing the cleaner to not work normally. At the same time, the failure of voltage and current control may even lead to the temperature rise of the dielectric material at the point of current leakage of the micro electrostatic filter, melt-through, and burnout over a large area. Commercially available micro electrostatic air cleaners cannot solve such problems, which sometimes cause the decrease in efficiency and dust-holding capacity in high humidity environments and fire accidents. Summary of the Invention

[0005] SUMMARY OF THE PRESENT APPLICATION An object of the present application is to provide a miniature electrostatic cleaning device that can withstand high humidity in order to meet the needs of applications in high humidity environments.

[0006] To achieve the above objectives, the technical solution of this application is as follows:

[0007] A micro electrostatic cleaning device that is resistant to high humidity, the micro electrostatic cleaning device that is resistant to high humidity includes a filter core, The filter core is formed by laminating insulating dielectric plates having an air passage between upper and lower panels, a spacing isolator is disposed between the upper and lower panels, and the spacing isolator and the upper and lower panels form an air passage. The insulating dielectric plates are provided with electrode materials on the panels, and the electrode materials are recessed at preset distances relative to the four sides of the insulating dielectric plates, and the recess distance at one end in the longitudinal direction is greater than the recess distance at the other end. When the insulating dielectric plates provided with electrode materials are laminated, the upper and lower layers are laminated in opposite directions in the horizontal direction, and the edges of the filter core are completely sealed with the electrode materials by a thermal melting and cutting process. At both ends of the longitudinal direction of the filter core, two electrode band accommodation grooves for accommodating a first electrode band and a second electrode band are cut out by thermal fusion cutting, and the first electrode band and the second electrode band are electrically connected to electrode materials having a short recess distance at the ends where the electrode bands are located, An insulated lead wire is connected to the first electrode band and the second electrode band, respectively, and the joints connecting the first electrode band and the second electrode band to the insulated lead wire are sealed in the electrode band accommodating groove of the filter core.

[0008] Furthermore, the high humidity resistant micro electrostatic cleaning device further comprises an upper housing and a lower housing for accommodating the filter core.

[0009] Furthermore, the other ends of the insulated lead wires connected to the first electrode band and the second electrode band are connected to a power supply module, the power supply module being an external power supply module, the power supply module comprising a sampling and comparison circuit, a current limiting circuit and a voltage adjusting circuit, the sampling and comparison circuit adjusting the output voltage to a constant voltage output by the voltage adjusting circuit when it detects a change in output voltage, the sampling and comparison circuit limiting the load current by the current limiting circuit after detecting that a current change exceeds a set threshold, the micro electrostatic filter further comprising a first electrode contact piece and a second electrode contact piece connected to the power supply module, the first electrode contact piece being connected to the first electrode band via an insulated lead wire, and the second electrode contact piece being connected to the second electrode band via an insulated lead wire.

[0010] Furthermore, the lower housing is provided with a first cavity portion and a second cavity portion for accommodating a first electrode contact piece and a second electrode contact piece, respectively, and after accommodating the first electrode contact piece and the second electrode contact piece, the first cavity portion and the second cavity portion are sealed by glue potting.

[0011] Furthermore, two semi-protruding partition pieces are arranged inside the first cavity portion and the second cavity portion, respectively, and the middle portions of the first electrode contact piece and the second electrode contact piece are concave and are sandwiched between the partition pieces.

[0012] Furthermore, the lower housing is provided with two grooves between the first cavity portion and the second cavity portion.

[0013] Furthermore, in another embodiment of the present application, the other end of the insulating lead wire connected to the first electrode band and the second electrode band is connected to a power supply module, and the power supply module is a built-in power supply module provided in the upper housing or the lower housing, and the power supply module includes a sampling and comparison circuit, a current limiting circuit, and a voltage adjusting circuit, and when the sampling and comparison circuit detects a change in output voltage, the voltage adjusting circuit adjusts the output voltage to a constant voltage output, and when the sampling and comparison circuit detects that the current change exceeds a set threshold, the current limiting circuit limits the load current, and the output end of the power supply module is connected to the first electrode band and the second electrode band via an insulating lead wire, and the input end of the power supply module is connected to the third electrode contact piece and the fourth electrode contact piece via an insulating lead wire, and the third electrode contact piece and the fourth electrode contact piece are sandwiched in a cavity portion opened in the upper housing or the lower housing, and the connection portion between the third electrode contact piece and the fourth electrode contact piece and the insulating lead wire and the connection portion between the power supply module and the insulating lead wire are sealed by glue potting.

[0014] Furthermore, magnets are further provided on both sides of the upper housing or the lower housing.

[0015] Furthermore, the air passages of the insulating dielectric plates of the filter core are quadrilateral air passages, the quadrilateral air passages are distributed in a staggered pattern, and a spacing isolation member of the quadrilateral air passage of one insulating dielectric plate is located between two spacing isolation members of the quadrilateral air passage of another insulating dielectric plate.

[0016] Furthermore, the electrode material is recessed by a preset distance with respect to four sides of the insulating dielectric plate material, and the recess distance at one end in the longitudinal direction is larger than the recess distance at the other end; The recess distance at one end in the longitudinal direction is 1010 to 30 mm, while the recess distance at the other end is 2 to 10 mm; The recess distance from the edge on both the left and right sides is 2 to 15 mm.

[0017] Furthermore, the bottom of the electrode band accommodating groove reaches the electrode material with the shorter recess distance at one end where it is located or extends 0 to 10 mm into the electrode material with the shorter recess distance at one end where it is located, the width of the bottom of the electrode band accommodating groove is 2 to 10 mm, and the two electrode band accommodating grooves match the first electrode band and the second electrode band.

[0018] Furthermore, the raw materials of the insulating dielectric plate material include a granular insulating dielectric raw material having a weight percentage of 89 to 93%, a flame retardant having a weight percentage of 3 to 8%, and a color masterbatch having a weight percentage of 1 to 3%, the granular insulating dielectric raw material being at least one of polyethylene, polypropylene, polyvinyl chloride, polystyrene, acrylonitrile-butadiene-styrene copolymer, polyoxymethylene, polyamide, polycarbonate, polyethylene terephthalate, or polyimide, and the flame retardant being at least one of tris(2,3-dibromopropyl)isotrimellate, tribromophenol, trimethylphenylphosphate, triphenylphosphonate, or dimethylmethylmethylphosphonic acid.

[0019] Furthermore, after laminating the insulating dielectric plates provided with the electrode material, the side on which the electrode material is exposed is covered with at least one layer of insulating dielectric plate material not provided with the electrode material.

[0020] In the high humidity-resistant micro electrostatic cleaning device presented in this application, taking into consideration the problem of the unstable operation and low efficiency of the micro electrostatic air purifier in a high relative humidity environment, four aspects, namely, the frame structure, the sealing of the electrode circuit, the design of the filter structure, and the current limit of the power supply, are improved simultaneously, and the rationality of the frame structure, the sealing of the electrode circuit, and the design of the filter structure is improved, and the current detection and limiting by the power supply are enhanced, so that in a high humidity environment, the stability of the work is improved, the work efficiency and dust prevention ability are ensured, and problems such as current leakage, low high humidity efficiency, and arc discharge are avoided. [Brief description of the drawings]

[0021] [Figure 1] 1 is a schematic diagram of a configuration of a micro electrostatic cleaning device according to a first embodiment of the present application. [Diagram 2] FIG. 1 is an exploded view of a first embodiment of the micro electrostatic cleaning device of the present application. [Diagram 3] FIG. 2 is a schematic diagram of an insulating dielectric plate according to an embodiment of the present application. [Figure 4] 11A and 11B are schematic diagrams for comparing staggered arrangements of air passages. [Diagram 5] FIG. 2 is a schematic diagram of lamination of the insulating dielectric plate material of the present application. [Figure 6] FIG. 2 is a schematic diagram of the configuration of a filter core of the present application. [Figure 7] FIG. 2 is a schematic diagram of a mounting cavity of an electrode contact piece according to an embodiment of the present application. [Figure 8] 2 is a schematic diagram of the shape of an electrode contact piece according to an embodiment of the present application. FIG. [Figure 9] FIG. 2 is an exploded view of the built-in micro-electrostatic filter of the power supply module of the present application. [Figure 10] FIG. 11 is a schematic view showing an installation of a power supply module according to a second embodiment of the present application. [Figure 11] FIG. 2 is a schematic diagram of the structure of a power module according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be described in more detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to interpret the present application, and are not intended to limit the present application.

[0023] Existing micro electrostatic cleaning devices have the following problems in high humidity environments:

[0024] 1. The frame or electrode circuit of the micro electrostatic cleaning device is not completely sealed, or the dielectric material on the surface is damaged. If the electrode circuit of the micro electrostatic cleaning device is not completely sealed or the dielectric material on the surface is damaged, in the case of high humidity environment or the presence of water droplets, it is easy to form a short circuit, which will cause leakage, breakdown, arc and ignition, and the nearby coated dielectric material will also be destroyed, ignite or burn. In addition, if there is adsorbed particulate matter attached, it is easy to concentrate the charge on the electrode plate, and the attached particulate matter is also easy to adsorb droplets in the air, and the swelling will increase the leakage of current, reduce the efficiency of the filter, and further damage the coated dielectric material, which is more likely to affect normal and safe operation.

[0025] 2. There is no open-loop control of the constant power supply or the current limiting design of the electronic control loop. In a certain range of voltage rise, the cleaning efficiency of the micro electrostatic cleaning device is proportional to the voltage, and the higher the voltage, the higher the cleaning efficiency. With the increase in air humidity, if the voltage is too high, arc discharge and ignition are likely to occur, which will at least lead to the failure of the micro electrostatic cleaning device, and at worst, a fire caused by an open flame will occur. At present, most of the power supply modules of the micro electrostatic cleaning device are constant power and adopt open loop control, that is, the control in which the output voltage changes according to the change in load. With the increase in air humidity, the accumulation of dust in the micro electrostatic cleaning device will cause voltage changes, which will lead to a decrease in cleaning efficiency or even failure.

[0026] In addition, the power supply module of the micro electrostatic cleaning device generally does not have a detection control module, and there is no monitoring or limiting of the current, that is, the output current changes with the change of the load. With the increase in air humidity, the air is more prone to ionization or breakdown, and the accumulation of dust in the micro electrostatic cleaning device leads to the shrinkage of the ionization gap, at this time the current increases rapidly and reaches a maximum with complete destruction, causing the purifier to short circuit and burn out, and in the worst case, it may cause an open flame.

[0027] Hereinafter, the high humidity-resistant micro electrostatic cleaning device of the present application will be described through two embodiments, an embodiment with an external power supply module and an embodiment with a built-in power supply module.

[0028] As shown in FIG. 1 and FIG. 2, in the first embodiment, the micro electrostatic cleaning device includes a filter core 3, in which: The filter core 3 is formed by laminating insulating dielectric plates having air passages between upper and lower panels, a spacing isolator is disposed between the upper and lower panels, and the spacing isolator and the upper and lower panels form an air passage; the panels of the insulating dielectric plate are provided with electrode materials, and the electrode materials are recessed at preset distances relative to the four sides of the insulating dielectric plate, and the recess distance at one end in the longitudinal direction is greater than the recess distance at the other end; when the insulating dielectric plates provided with electrode materials are laminated, the upper and lower layers are laminated in opposite directions in the horizontal direction; and the edges of the filter core 3 are completely sealed with the electrode materials by a thermal melting and cutting process; At both ends of the filter core 3 in the longitudinal direction, two electrode band accommodation grooves for accommodating a first electrode band 71 and a second electrode band 72 are cut out by thermal melting and cutting, and the first electrode band 71 and the second electrode band 72 are electrically connected to electrode materials having short recess distances at the ends where the electrode bands are located, An insulated lead wire is connected to the first electrode band 71 and the second electrode band 72, respectively, and the joints connected to the first electrode band 71 and the second electrode band (72) and the insulated lead wire are sealed in the electrode band accommodating groove of the filter core 3.

[0029] In one specific embodiment of the present invention, the high humidity resistant micro electrostatic cleaning device further includes an upper housing 1 and a lower housing 2. The upper housing 1 and the lower housing 2 are combined to form a space for accommodating the filter core 3, and the filter core 3 is accommodated therein.

[0030] It should be noted that the present application does not limit the specific compositional form of the housing that houses the filter core, and the embodiment in FIG. 1 embodies only one form. For example, a box may be directly provided and the filter core may be housed therein, or fasteners may be directly used on both ends to clamp the filter core for use.

[0031] Specifically, the filter core 3 is formed by laminating multiple insulating dielectric plates. As shown in Fig. 3, a single-layer insulating dielectric plate has upper and lower panels and a spacing isolator 102 provided between the upper and lower panels, and the spacing isolator and the upper and lower panels form an air passage 101. Due to the supporting effect of the spacing isolator, the shape of the insulating dielectric plate is well maintained, the distance between the electrode materials on both sides is fixed, it is difficult to ignite, and the problem of corona discharge caused by non-parallel electrodes is avoided.

[0032] In this embodiment, the air passages are preferably rectangular, although they may of course be of other shapes, such as triangular, trapezoidal, etc. In one particular embodiment, when the insulating dielectric plates are stacked, the quadrilateral air passages of adjacent insulating dielectric plates are distributed in a staggered manner. As shown in FIG. 4, a spacing separator of a quadrilateral air passage of one insulating dielectric plate is located between two spacing separators of a quadrilateral air passage of another insulating dielectric plate. In the case of other shapes of air passages, the air passages are also distributed in a staggered manner so that the spacing separators are offset from each other.

[0033] The spacing isolators on the left side of FIG. 4 are not offset from each other, so that dust collection at the corners of the upper and lower air passages is likely to cause destruction or fire between the electrodes. In the present application, the design on the right side of FIG. 4 is adopted. That is, the spacing isolator of the quadrilateral air passage is located between the two spacing isolators of the quadrilateral air passage of another insulating dielectric plate, and is preferably located at the middle position. With such a design, the corners of the quadrilateral air passage are offset, and even if dust collection occurs, no short circuit due to dust collection is formed, so that fire in a high humidity environment can be effectively avoided. Each strip electrode is parallel and equidistant, so that the problem of corona discharge caused by non-parallel electrodes can be avoided.

[0034] When the cleaning device adsorbs particulate matter, the isolating member for maintaining the distance forms a right angle of almost 90 degrees with the insulating dielectric plate, so friction occurs between the insulating dielectric plate and the air, and particulate matter and other contaminants tend to concentrate at this angle, and particulate matter and other contaminants tend to adhere to the side of the insulating dielectric plate facing the airflow. Therefore, in later operations, there is a high possibility that contaminants will accumulate in these two places, which means that the resistance of the leakage path will decrease and the leakage current will increase.

[0035] When the upper and lower spacing isolation members of the same insulating dielectric plate are arranged in the same straight line, the adsorbed dirt accumulates fastest at the four right angles and the windward side of the insulating dielectric plate, and the resistance of the leakage path with other insulating dielectric plates decreases fastest, and the occurrence of leakage current increases. The staggered spacing isolation members of the present application definitely minimizes the leakage path in a limited space.

[0036] In this way, taking the electrostatic cleaning device commonly used inside the air conditioner box as an example, if the cleaning device is 310 mm wide (500 mm long, 50 mm thick), a dust collection space is formed every 2.14 mm thick, or if the dust collection space is occupied by adjacent high and low potential insulating dielectric plates, there are a total of 144 dust collection spaces, eliminating 288 leakage paths that may cause current leakage. In some application fields, the thickness of the dust collection space reaches about 1 mm, and with the same width, there are more paths that generate leakage current, but by adopting the design of this application, the leakage paths can be greatly reduced and the generation of leakage current can be reduced.

[0037] In this embodiment, the electrode material is provided on the panel of the insulating dielectric plate, and is usually provided on one side. The electrode material is recessed at a preset distance with respect to each of the four sides of the insulating dielectric plate, i.e., a certain distance is kept from the edge, so as to avoid the discharge phenomenon between the electrode and the surrounding objects. The recess distance at one end in the longitudinal direction is larger than that at the other end, and when stacked, the upper and lower two layers are stacked in the horizontal opposite directions. As shown in FIG. 5, when stacked, the two adjacent layers are horizontally opposite, for example, the electrode material of the upper layer has a large recess distance (L2) on the right side and a small recess distance (L1) on the right side, while the adjacent lower layer has a large recess distance on the left side and a small recess distance on the right side.

[0038] For example, the recess distance of one end in the longitudinal direction is 10 to 30 mm, while the recess distance of the other end is 2 to 10 mm, and the recess distance of both left and right sides from the edge is 2 to 15 mm. The left and right sides of the electrode material are kept at a certain distance from the edge of the filter core to prevent the electrode from igniting. The length and width of the electrode material are adapted to the design of the filter core and are not limited here. The electrode material is composed of resin, conductive material, flame retardant, adhesive, and other materials, has semiconductivity, and its internal resistance is within the range of 105 to 108 megaohms.

[0039] It should be noted that in an electrostatic cleaning device, if a large leakage current occurs between two pairs of insulating dielectric plates, the voltage between the plates will decrease, and the efficiency of one cleaning of particulate matter will decrease. If the high-voltage power supply module adopts a constant voltage output, the power consumption will increase with the increase in leakage current, and when the maximum current of the high-voltage power supply is reached, the voltage across the cleaning device will decrease or the efficiency of the electrostatic cleaning device will decrease. At the same time, the increase in leakage current will cause local ignition or ablation, destroying the structure of the cleaning device. Therefore, in this application, the electrode material is recessed into the insulating dielectric plate material at different depths to minimize the occurrence of leakage current.

[0040] The main cause of leakage current in electrostatic cleaning equipment is the leakage current along the two pairs of insulating dielectric plates with different potentials. This leakage current is affected by the voltage between the insulating dielectric plates, the length of the leakage distance, the relative humidity of the working environment, and the surface conductivity of the insulating dielectric plates. A clean cleaning equipment does not have the problem of leakage current increasing due to external factors. When the air that needs to be cleaned passes through the cleaning equipment, the contaminants and other dirt in the air are adsorbed on the insulating dielectric plates of the cleaning equipment and continue to accumulate, so the leakage distance between the insulating dielectric plates is shortened and the leakage current increases. At the same time, most of the dirt accumulated on the insulating dielectric plates has considerable conductivity, so it increases the conductivity of the surface of the insulating dielectric plates and increases the leakage current. Under the same conditions, when the relative humidity increases, the resistance generated by the physical distance between the two pairs of insulating dielectric plates with different potentials also decreases, and the generation of leakage current also increases. To reduce leakage current, the voltage between two pairs of insulating dielectric plates can be reduced in one direction. However, this reduces the electric field strength between the insulating dielectric plates, and the electric field force that charged particulate matter experiences when passing through the space between the insulating dielectric plates is reduced. Therefore, reducing the voltage between the insulating dielectric plates weakens the adsorption ability of pollutants such as particulate matter, which affects the cleaning efficiency of the electrostatic cleaning equipment.

[0041] Therefore, since the electrode material of the present invention has different recessed distances at both ends of the insulating dielectric plate, after stacking and fusing the notch, the high potential and low potential insulating dielectric plates can form a large physical space separation, which greatly reduces the possibility of leakage current. Even if some dirt accumulates at the end of the insulating dielectric plate, the distance between the high potential and low potential insulating dielectric plates is long, i.e., the leakage path is long, so leakage current is unlikely to occur.

[0042] In this embodiment, an insulating dielectric plate provided with an electrode material is used, and the number of layers is determined according to the size of the filter core required in the end. Various lamination methods can be used to encase the side with the electrode material in the entire filter core, so that the electrode material is not exposed. It is also possible to completely seal the electrode material in the insulating dielectric by covering the side where the electrode material is exposed after lamination with at least one layer of insulating dielectric plate without electrode material. Or, it can be covered with a layer of another insulating dielectric material, but this will not be repeated here.

[0043] In the conventional insulating dielectric plate, there is no effective pressing between the layers, and the gap between the layers is easily connected to the exposure of the printed circuit, which causes leakage current and arc discharge. The adhesive paste method is used between the layers, and the external influence such as heat may cause poor internal sealing or exposure of the printed circuit, which may cause leakage current and arc discharge. In the present application, the method of hot-melting cutting with electric heating wire is creatively adopted to cut out the filter core, and each edge of the filter core is cut by hot-melting cutting with electric heating wire. When hot-melting cutting with electric heating wire is performed, the insulating dielectric material at the cut edge is slightly liquefied by hot melting to form a curled edge, which is blended with the cut edge between the layers after cooling to form a seal for the electrode material. The present application overcomes the problems of poor internal sealing and exposed printed circuit caused by the conventional processing method, which is easy to cause current leakage and arc discharge, and can realize that the insulating dielectric material is completely covered without damage.

[0044] In one particular embodiment, when the ambient temperature is 24 to 25° C., the heating temperature range of the heating wire is 190° C. to 210° C., preferably 200° C. The advancing speed of the heating wire is 5 to 20 mm / min, preferably 12 mm / min.

[0045] The raw materials of the insulating dielectric plate material of the present application include granular insulating dielectric raw material, flame retardant, and color masterbatch, and secondary granulation is performed first. Before the second granulation, the granular insulating dielectric raw material is dried. By drying, the water vapor in the dielectric material can be evaporated to avoid the generation of bubbles during extrusion molding and affecting the flatness of the surface of the isolation support frame of the electrode material. Specifically, the weight ratios of the granular insulating dielectric raw material, flame retardant, and color masterbatch in this embodiment are 89% to 93% of the granular insulating dielectric raw material, 3% to 8% of the flame retardant, and 1% to 3% of the color masterbatch after drying, respectively.

[0046] Among them, the raw material of the granular insulating dielectric is one of polyethylene, polypropylene, polyvinyl chloride, polystyrene, acrylonitrile-butadiene-styrene copolymer, polyoxymethylene, polyamide, polycarbonate, polyethylene terephthalate, or polyimide, or a mixture of multiple types thereof. The flame retardant is one of tris(2,3-dibromopropyl)isotrimerate, tribromophenol, trimethylphenylphosphate, triphenylphosphonate, or dimethylmethylphosphonate, or a mixture of multiple types thereof. The masterbatch is a color masterbatch corresponding to the selected granular insulating dielectric raw material.

[0047] After the second granulation, the raw material should have a melt index of 3 to 6g / 10min. If it is too low, it will turn into liquid quickly when it is hot melt cut, and if it is too high, the curled edge of the hot melt cut will not be able to completely cover the internal electrode material.

[0048] 6, two electrode band accommodation grooves, i.e., a first groove 31 and a second groove 32, are cut out by thermal melting cutting at both ends of the filter core 3 in the longitudinal direction, and the electrode band accommodation grooves are perpendicular to the plane in which the electrode material is located. The electrode band has electrical conductivity, and the material thereof is not limited here.

[0049] Since the electrode material on the insulating dielectric plate has different recessed distances at both ends in the longitudinal direction, after stacking, a part of the electrode material is on the first groove 31 side and adjacent to the first groove 31, another part of the electrode material is far away from the first groove 31, and this far away part of the electrode material is on the second groove 32 side and adjacent to the second groove 32.

[0050] In this manner, the first electrode strip 71 and the second electrode strip 72 are inserted into the first groove 31 and the second groove 32, respectively, and then electrically bonded with the adjacent electrode materials to form the positive and negative electrodes of the electrostatic cleaning device.

[0051] In some embodiments, the bottom of the electrode band receiving groove reaches the electrode material with a short recess distance at one end located therein or extends 0 to 10 mm into the electrode material with a short recess distance at one end located therein, the width of the bottom of the electrode band receiving groove is 2 to 10 mm, and the two electrode band receiving grooves are matched with the first electrode band 71 and the second electrode band 72 to form an independent sealing space. The electrode band and its joint are sealed in the electrode band holding groove by glue potting, which achieves a better sealing effect.

[0052] In this embodiment, the electrode strip and the electrode material are bonded by electrical induction, and the electrode strip is cut by thermally fusing the groove, and the cut-out depth is such that the bottom of the groove just contacts the electrode material with a short recess distance at the end where the groove is located, or extends to the electrode material with a short recess distance at the end where the groove is located. In this way, the inserted electrode strip and electrode material have good electrical induction, and the charging effect is good.

[0053] As shown in FIG. 2, an insulated lead wire is connected to the first electrode band 71 and the second electrode band 72, respectively. By sealing the first groove 31 and the second groove 32 with sealing material (91, 92), the joints connected to the first electrode band 71 and the second electrode band 72 and the insulated lead wire are sealed in the electrode band accommodating groove of the filter core 3, thereby achieving complete sealing.

[0054] The other ends of the insulated lead wires connected to the first electrode band (71) and the second electrode band (72) are connected to a power supply module, and the power supply module includes a sampling and comparison circuit, a current limiting circuit, and a voltage adjusting circuit. When the sampling and comparison circuit detects a change in output voltage, the voltage adjusting circuit adjusts the output voltage to a constant voltage output, and when the sampling and comparison circuit detects that a current change has exceeded a set threshold, the current limiting circuit limits the load current.

[0055] In this embodiment, the power supply module is external, and the output of the power supply module is connected to the electrode contact of the device to supply power, and the electrode contact is connected to the electrode band via an insulated lead wire. Since the power supply module is external, the other end of the insulated lead wire is connected to two electric contacts, the first electrode contact 41 and the second electric contact 42, respectively, and the first electrode contact 41 and the second electric contact 42 are connected to an external power supply via an insulated lead wire.

[0056] Specifically, in this embodiment, the first electrode contact piece 41 that connects to the power supply module is connected to the first electrode band 71 via a first insulated lead wire 5, and the second electrode contact piece 42 is connected to the second electrode band 72 via a second insulated lead wire 6. The first electrode band 71 and the second electrode band 72 are housed in the electrode band housing grooves (the first groove 31 and the second groove 32), and then the two electrode band housing grooves are sealed with sealants (91 and 92).

[0057] As shown in FIG. 1, one end of the lower housing 2 corresponding to the first groove 31 is provided with a first cavity portion 21 and a second cavity portion 22 for accommodating a first electrode contact piece 41 and a second electrode contact piece 42, respectively, and after accommodating the first electrode contact piece 41 and the second electrode contact piece 42, the first cavity portion 21 and the second cavity portion 22 are sealed by glue potting.

[0058] In this application, regardless of the electrode material in the filter core, or the electrode contact pieces and electrode strips, and their connection sites, they are completely sealed by insulating dielectric materials or sealing materials, so that the sealing and insulation of the electrodes is realized and the filter can operate smoothly even in high humidity environments with a relative humidity of >80%.

[0059] This application solves the problem of increased leakage current caused by sealing problems, and cuts grooves with heating wires on both ends of an insulating dielectric plate, the depth of the groove at one end just reaches the outer edge of the electrode material with a short recess distance at that end, and the depth of the groove at the other end just reaches the outer edge of the electrode material with a short recess distance at that end, and the upper and lower end faces of the electrode material support frame on three sides of the groove are hot-melted and sealed to prevent dirt such as water and particles from seeping into the air along the air flow direction, and isolates the groove and the airflow passage from each other, making the groove an independent space.

[0060] The electrode strip is embedded in the corresponding groove, and the insulating sealant is potted, so that the electrode strip is firmly fixed in the groove to prevent the electrode strip from leaking current into the groove. At the same time, one end of the electrode strip is connected to the DC high-voltage output line of the high-voltage power supply module to form a high voltage of the cleaning device, and the high-voltage induced voltage is used to connect the electrode strip to the electrode material, and the required voltage value is formed between the continuously stacked insulating dielectric plates.

[0061] This ingenious design minimizes leakage current generation: the electrode material is enclosed inside an insulating dielectric plate, the electrode strip connected to high voltage is enclosed inside a groove, and a direct connection between the two is used, which is different from existing technology, and the electrical connection is made in the form of high voltage induction, which helps to significantly shorten the path of leakage current generation.

[0062] In another embodiment, as shown in Figures 7 and 8, two semi-protruding partition pieces are arranged inside the first cavity portion 21 and the second cavity portion 22, respectively, and the middle portions of the first electrode contact piece 41 and the second electrode contact piece 42 are concave and are sandwiched between the partition pieces.

[0063] The electrode contact piece in this embodiment is sandwiched between the partition pieces, and the partition pieces are sealed by potting the sealant after forming a labyrinth inside the first cavity portion 21 and the second cavity portion 22. A labyrinth-type sealing structure is designed, and the exposed electrodes are sealed with adhesive. As for the exposed electrical contacts in the circuit, they are sealed with adhesive, and the two are firmly and seamlessly bonded to realize the waterproof design of the circuit. The electrode contact piece is tightly coupled with the insulating lower housing 2, and the molten insulating sealant tank is placed in the first cavity and the second cavity, and the electrode contact piece is completely submerged in the sealant, thereby realizing the sealing and insulation of the electrodes. The lead wire 5 or 6 extends along the groove next to the first cavity portion 21 and the second cavity portion 22 and is connected to the first electrode strip 71 and the second electrode strip 72.

[0064] In another specific embodiment, as shown in Fig. 7, the lower housing 2 is provided with two grooves between the first cavity portion 21 and the second cavity portion 22. The creepage distance can be increased in the presence of water or dust.

[0065] The power supply module in this embodiment 1 includes a sampling and comparison circuit, a current limiting circuit, and a voltage adjusting circuit. When the sampling and comparison circuit detects a change in output voltage, the voltage adjusting circuit adjusts the output voltage to a constant voltage output. After the sampling and comparison circuit detects that a current change has exceeded a set threshold, the current limiting circuit limits the load current.

[0066] Here, the sampling and comparison circuit detects the output voltage and current, and when it detects the output voltage change, it adjusts the output voltage to a constant voltage output by the voltage adjustment circuit, so that when the load changes, the voltage is automatically adjusted to match the set value, and the output voltage is kept constant and stable. Therefore, it can maintain high cleaning efficiency in various humidity environments. When the current change exceeds the set threshold, a current limiting circuit is added to the circuit, and the load current is limited by the current limiting circuit, so that when the instantaneous change in the working current exceeds the threshold, it will perform current limiting protection, and when the load changes abnormally and the instantaneous change in the working current becomes large or exceeds the rated value, it will automatically cut into the current limiting circuit (current limiting resistor of about 100 megaohms, different filter cores are designed with different matching resistors), limiting the sudden change in current and the upper limit, so as to prevent the filter from catching fire in high humidity environments, which is safe and reliable.

[0067] In the previous embodiment, power is supplied via an external power supply module. The power supply module of the present application can be built into the housing of the micro electrostatic cleaning device that is resistant to high humidity, and can be connected to an external AC power source for power supply.

[0068] In this application, when the upper and lower housings are fixed to the filter core, a layer of hot melt adhesive is applied around the inside of the housing or along the windward and leeward edges of the filter core to improve the strength and sealing of the connection between the housing and the filter core. At the same time, insulating dielectric plates of the same width can be attached to both ends of the filter core in the longitudinal direction to improve the sealing.

[0069] In the second embodiment, as shown in Figs. 9 and 10, a power supply module 10 of the present embodiment is built into a housing and connected to an external power supply via electrode contact pieces.

[0070] In this embodiment, the third electrode contact piece 43 and the fourth electrode contact piece 44 are connected to the input end of the power supply module 10 via insulated lead wires 7 and 8, and the first electrode band 71 and the second electrode band 72 are connected to the output end of the power supply module 10 via insulated lead wires 5 and 6.

[0071] After the first electrode band 71 and the second electrode band 72 are connected with an insulating lead wire, they are sealed by glue potting with a sealant (91, 92). The connection part between the power supply module and the insulating lead wire is also sealed with a sealant.

[0072] Similarly, a cavity portion for mounting the electrode contact piece is provided in the housing (upper housing or lower housing), and after the electrode contact piece is connected with an insulated lead wire, it is placed in the cavity portion and sealed with a sealant.

[0073] In this embodiment, magnets 11 are further arranged on both sides of the upper housing 1 or the lower housing 2, and the magnets interact with the external housing of the micro-electrostatic air purifier, thereby enabling the micro-electrostatic air purifier to be stably installed within the housing.

[0074] In addition, the installation positions of the electrode contact pieces and the power supply module in the present application can be within the upper housing or within the lower housing, and the above embodiment is merely a specific implementation form, and the present application is not limited to a specific housing structure.

[0075] As shown in FIG. 11, the power supply module of the present invention mainly includes a rectifier / smoothing circuit, a switch circuit, a boost / voltage doubling circuit, a sampling / comparison circuit, a voltage adjustment circuit, and a current limiting circuit.

[0076] When the sampling and comparison circuit detects a change in the output voltage, it regulates the output voltage to a constant voltage output by the voltage regulation circuit, and after the sampling and comparison circuit detects that the current change exceeds a set threshold, it limits the load current by the current limiting circuit.

[0077] During operation, the power supply module maintains a constant voltage output and maintains the ionization strength, so as not to be affected by the load micro electrostatic filter and environmental humidity, ensuring the ability and efficiency of the micro electrostatic filter device to adsorb particulate matter. The output voltage U is acquired by the sampling and comparison circuit, and compared with the reference set voltage U0 in real time. If it is higher or lower than the set voltage U0, it is adjusted by the voltage adjustment circuit to provide a constant voltage and stable output. Under normal operating conditions, the power supply module outputs a constant voltage stably. When the environmental humidity of the micro electrostatic air purifier increases, the air becomes easier to ionize, or as the running time increases, there is more dust in the micro-porous passage of the micro electrostatic filter, and the distance between the two pole plates of high voltage and ground becomes shorter, the current of the power supply module continues to increase or increases sharply. Therefore, the output current I is acquired by a sampling and comparison circuit, and when the current changes suddenly (di / dt> a certain set value X) or exceeds a certain rated value I0, it automatically (at the nanosecond level) switches into a current limiting protection loop, and a current limiting resistor (about 100 megaohms) is connected to the constant voltage output circuit. Since the total resistance of the entire circuit increases instantly, the output current immediately decreases, limiting the current increase and preventing the micro-electrostatic filter from being burned out by the large current.

[0078] In the power supply module of the present application, each of the rectifier smoothing circuit, switch circuit, boost / voltage doubling circuit, sampling / comparison circuit, voltage adjustment circuit, and current limiting circuit can be realized using circuits commonly used in the technical field, so they will not be repeated here.

[0079] The above embodiments merely represent some embodiments of the present application, and although the description is relatively specific and detailed, they cannot be understood as limiting the patent scope of the present invention. It should be noted that those skilled in the art can also make many modifications and improvements without departing from the concept of the present invention, which are within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the claims.

Claims

1. A micro electrostatic cleaning device that is resistant to high humidity, the micro electrostatic cleaning device that is resistant to high humidity includes a filter core (3), The filter core (3) is formed by laminating insulating dielectric plates having air passages between upper and lower panels, a spacing isolator (102) is disposed between the upper and lower panels, and the spacing isolator (102) and the upper and lower panels form an air passage. An electrode material is provided on the panel of the insulating dielectric plate, and the electrode material is recessed at a preset distance from each of the four sides of the insulating dielectric plate, and the recess distance at one end in the longitudinal direction is larger than the recess distance at the other end. When the insulating dielectric plate provided with the electrode material is laminated, the upper and lower layers are laminated in opposite directions in the horizontal direction, and the edges of the filter core (3) completely seal the electrode material by a thermal melting and cutting process. At both ends of the longitudinal direction of the filter core (3), two electrode band accommodation grooves for accommodating a first electrode band (71) and a second electrode band (72) are cut out by thermal melting and cutting, and the first electrode band (71) and the second electrode band (72) are electrically connected to electrode materials having short recess distances at the ends where the electrode bands are located, An insulated lead wire is connected to the first electrode band (71) and the second electrode band (72), respectively, and the joints connected to the first electrode band (71) and the second electrode band (72) and the insulated lead wire are sealed in the electrode band accommodating groove of the filter core (3).

2. The high humidity resistant micro electrostatic cleaning device according to claim 1, further comprising an upper housing (1) and a lower housing (2) for accommodating the filter core (3).

3. The other end of the insulating lead wire connected to the first electrode band (71) and the second electrode band (72) is connected to a power supply module, the power supply module being an external power supply module, the power supply module comprising a sampling and comparison circuit, a current limiting circuit and a voltage adjusting circuit, the sampling and comparison circuit adjusts the output voltage to a constant voltage output by the voltage adjusting circuit when it detects a change in output voltage, the sampling and comparison circuit limits the load current by the current limiting circuit after it detects that the current change exceeds a set threshold, the micro electrostatic filter further comprising a first electrode contact (41) and a second electrode contact (42) connected to the power supply module, the first electrode contact (41) being connected to the first electrode band (71) via an insulating lead wire, and the second electrode contact (42) being connected to the second electrode band (72) via an insulating lead wire.

4. The micro-electrostatic cleaning device of claim 3, characterized in that the lower housing (2) is provided with a first cavity portion (21) and a second cavity portion (22) for accommodating a first electrode contact piece (41) and a second electrode contact piece (42), respectively, and the first cavity portion (21) and the second cavity portion (22) are sealed by glue potting after accommodating the first electrode contact piece (41) and the second electrode contact piece (42).

5. A micro electrostatic cleaning device that can withstand high humidity as described in claim 4, characterized in that two semi-protruding partition pieces are arranged inside the first cavity portion (21) and the second cavity portion (22), respectively, and the middle portions of the first electrode contact piece (41) and the second electrode contact piece (42) are concave and are sandwiched between the partition pieces.

6. The micro electrostatic cleaning device resistant to high humidity according to claim 4, characterized in that the lower housing (2) is provided with two grooves between the first cavity portion (21) and the second cavity portion (22).

7. The other end of the insulated lead wire connected to the first electrode band (71) and the second electrode band (72) is connected to a power supply module, the power supply module being an internal power supply module provided in the upper housing or the lower housing, the power supply module comprising a sampling and comparison circuit, a current limiting circuit and a voltage adjusting circuit, the sampling and comparison circuit adjusts the output voltage to a constant voltage output by the voltage adjusting circuit when detecting an output voltage change, the sampling and comparison circuit limits the load current by the current limiting circuit after detecting that the current change exceeds a set threshold, the power supply module The high humidity resistant micro electrostatic cleaning device of claim 2, characterized in that the output end of the power supply module is connected to the first electrode band (71) and the second electrode band (72) via an insulating lead wire, the input end of the power supply module is connected to the third electrode contact piece and the fourth electrode contact piece via an insulating lead wire, the third electrode contact piece and the fourth electrode contact piece are sandwiched within a cavity portion opened in the upper housing (1) or the lower housing (2), and the connection portions between the third electrode contact piece and the fourth electrode contact piece and the insulating lead wire, and the connection portion between the power supply module and the insulating lead wire are sealed by glue potting.

8. 3. The high humidity resistant micro electrostatic cleaning device according to claim 2, characterized in that magnets (11) are further provided on both sides of the upper housing (1) or the lower housing (2).

9. 2. The micro electrostatic cleaning device capable of withstanding high humidity as described in claim 1, characterized in that the air passages of the insulating dielectric plate material of the filter core (3) are quadrilateral air passages, the quadrilateral air passages are distributed in a staggered pattern, and a spacing isolation member of the quadrilateral air passage of one insulating dielectric plate material is located between two spacing isolation members of the quadrilateral air passage of another insulating dielectric plate material.

10. The electrode material is recessed by a preset distance with respect to four sides of the insulating dielectric plate, and the recess distance at one end in the longitudinal direction is larger than the recess distance at the other end; The recess distance at one end in the longitudinal direction is 10 to 30 mm, while the recess distance at the other end is 2 to 10 mm; 2. The micro electrostatic cleaning device according to claim 1, wherein the recess distance from the edge of each of the left and right sides is 2 to 15 mm.

11. The micro electrostatic cleaning device resistant to high humidity as described in claim 1, characterized in that the bottom of the electrode band accommodating groove reaches the electrode material with a short recess distance at one end where it is located or extends 0 to 10 mm into the electrode material with a short recess distance at one end where it is located, the width of the bottom of the electrode band accommodating groove is 2 to 10 mm, and the two electrode band accommodating grooves match the first electrode band (71) and the second electrode band (72).

12. The micro electrostatic cleaning device according to claim 1, characterized in that the raw material of the insulating dielectric plate material includes 89 to 93% by weight of granular insulating dielectric raw material, 3 to 8% by weight of a flame retardant, and 1 to 3% by weight of a color master batch, the granular insulating dielectric raw material being at least one of polyethylene, polypropylene, polyvinyl chloride, polystyrene, acrylonitrile butadiene styrene copolymer, polyoxymethylene, polyamide, polycarbonate, polyethylene terephthalate, and polyimide, and the flame retardant being at least one of tris(2,3-dibromopropyl)isotrimelanate, tribromophenol, trimethylphenylphosphate, triphenylphosphonate, and dimethylmethylmethylphosphonic acid.

13. 2. The micro electrostatic cleaning device capable of withstanding high humidity as described in claim 1, characterized in that after stacking the insulating dielectric plate material provided with the electrode material, at least one layer of insulating dielectric plate material not provided with the electrode material is covered on the side on which the electrode material is exposed.

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