Trigger gap user outer high potential electromagnetic shielding dust removal control box

Abstract

The application discloses a kind of trigger gap user outer high potential electromagnetic shielding dust removal control box, comprising: box, six faces of box are assembled by the plate material of multilayer composite structure, one side is equipped with opening;Ventilation hole component suitable for being transferred in opening, ventilation hole component is the band-stop filter of stereoscopic hollow polygonal column structure;With dust removal control device being communicated with ventilation hole component and being set at dust removal control device high molecular waterproof single transparent membrane;Dust removal control device includes sensor module and high-voltage static generation module, sensor module is used to monitor the micro water content and dust concentration in air in real time, and according to monitoring result control high-voltage static generation module intermittent release high-voltage static electricity and carry out dust removal.The application improves the problem that electromagnetic wave invades due to ventilation hole component breaks electrical continuity and the problem that dust removal device cost is high, structure is complex and stability is poor.

Description

Technical Field

[0001] This invention relates to the field of high-voltage switch technology, and more specifically to a trigger gap outdoor high-potential electromagnetic shielding dust removal control box. Background Technology

[0002] In power systems, a fault in the converter transformer area may lead to transformer oil explosion. To prevent such accidents and protect the safe and stable operation of the high-voltage transmission network, a grounding trigger gap device must be installed to enable rapid transfer and extinguishing of arcing faults inside the converter transformer.

[0003] However, the control box for the grounding trigger gap is typically installed in extremely harsh electromagnetic and physical environments:

[0004] Strong electromagnetic interference environment: The control box is surrounded by ultra-high voltage and high voltage busbars, with extremely high voltage levels. Power grid fluctuations, harmonics, and other factors can generate strong electromagnetic interference (EMI). If shielding is inadequate, it can easily lead to distortion of the acquired or control signals, causing malfunctions of the grounding trigger gap and seriously threatening power grid safety.

[0005] High-altitude outdoor environment: Some control boxes can be installed at a height of about ten meters. At this height, they not only face meteorological challenges such as wind, sun, rain, and condensation, but also are subject to air pollutants such as willow catkins, dust, PM10, and PM2.5 year-round.

[0006] To ensure a stable operating environment during the trigger gap, the control equipment must be housed in an electromagnetically shielded enclosure. However, existing outdoor electromagnetically shielded control boxes suffer from the following significant technical bottlenecks in practical applications: (1) The contradiction between the shielding performance of the enclosure and its weight / cost.

[0007] To reduce interference from low-frequency magnetic fields, traditional aluminum alloy enclosures increase their thickness, leading to increased weight. When installed at heights, the high center of gravity necessitates the design of weighted supports to improve seismic resistance, further increasing installation difficulty and cost. Using advanced carbon fiber electromagnetic shielding enclosures would result in a significant increase in costs.

[0008] (2) Conflict between ventilation and heat dissipation and the integrity of electromagnetic shielding.

[0009] To address the heat dissipation issue of equipment inside the enclosure, traditional enclosures must have ventilation windows or vents. This design directly disrupts the electrical continuity of the shielding. Furthermore, currently designed band-stop filters have complex structures and manufacturing processes, resulting in high costs, low technological maturity, and significant performance differences between different manufacturers, and even between different batches from the same manufacturer, leading to low filter reliability.

[0010] (3) Risk of electromagnetic leakage at the connection point.

[0011] To reduce the contact resistance between the vent window assembly and the main body of the enclosure, existing technologies typically use conductive gaskets for filling. However, in outdoor environments with large temperature differences between day and night, the thermal expansion and contraction of the metal materials can cause tiny non-conductive air gaps to appear in the conductive gaskets. These air gaps can disrupt the shielding continuity, creating new electromagnetic leakage points, and the shielding effectiveness gradually decreases over long-term operation.

[0012] (4) Dust removal and maintenance are difficult and energy consumption is high.

[0013] To address the problem of dust and fluff clogging in high-altitude environments, existing solutions mostly employ passive dust filters, which can only block large particles and are ineffective against fine particles such as PM2.5. Furthermore, these filters are prone to clogging, leading to poor ventilation. While some automatic dust removal devices exist, their control systems are complex, consume high power, have poor stability, and lack intelligent sensing capabilities (e.g., they cannot activate based on actual air quality), resulting in high maintenance costs and low dust removal efficiency.

[0014] Therefore, proposing a control box that combines low cost, lightweight design, high shielding efficiency, intelligent low-power dust removal, and adaptability to complex outdoor environments is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0015] In view of the above problems, this invention is proposed to provide a trigger gap outdoor high-potential electromagnetic shielding dust removal control box that overcomes or at least partially solves the above problems. Through structural innovation of multi-layer composite structure box and waveguide filter ventilation hole assembly, and innovative control strategy of trigger gap intelligent dust removal, this invention successfully solves the contradiction between shielding effectiveness and weight cost, the conflict between ventilation and shielding, and the maintenance problem in harsh outdoor environments that has long plagued the industry. It provides a highly reliable, low-energy-consumption, and easy-to-maintain outdoor high-potential electromagnetic shielding control box solution.

[0016] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides a trigger gap user outdoor high-potential electromagnetic shielding dust removal control box, comprising: The enclosure is constructed from multi-layered composite panels on all six sides, with one side having an opening. A vent assembly adapted to be installed at the opening, wherein the vent assembly is a band-stop filter with a three-dimensional hollow polygonal columnar structure; A dust removal control device connected to the air vent assembly and a polymer waterproof one-way membrane disposed around the dust removal control device; The multi-layer composite structure of the plate comprises, from the inside out, an aluminum alloy base layer, a high magnetic permeability mesh intermediate layer, and an electromagnetic reflection film surface layer. The dust removal control device includes a sensor module and a high-voltage electrostatic generator module. The sensor module is used to monitor the moisture content and dust concentration in the air in real time, and controls the high-voltage electrostatic generator module to intermittently release high-voltage electrostatics for dust removal based on the monitoring results.

[0017] Furthermore, it also includes: a rain cover disposed above the vent assembly; The top surface of the rain cover is designed with a slope to guide condensed water droplets to drip off the edge and prevent rainwater from entering the vent assembly.

[0018] Furthermore, the vent assembly includes a frame base plate and multiple three-dimensional hollow polygonal columnar units.

[0019] Furthermore, the connection between the vent assembly and the opening of the housing is provided with a transition layer made by magnetron sputtering, which is used to reduce contact resistance and eliminate non-conductive air gaps, thereby maintaining the continuity of the electromagnetic shielding of the housing.

[0020] Furthermore, it also includes: a fan, which is disposed between the dust removal control device and the polymer waterproof one-way membrane; The fan is configured to have forward ventilation and reverse air blowing functions. When the air duct is detected to be poorly ventilated, reverse air blowing is performed to remove the dust adsorbed in the dust removal control device or air duct. The air duct is a channel for gas to enter and exit the housing, formed by the air vent assembly, dust removal control device and fan assembly.

[0021] Furthermore, it also includes a temperature and humidity controller, which is installed inside the enclosure and is used to activate the adjustment function when the temperature and humidity inside the enclosure exceed a preset range.

[0022] Furthermore, it also includes: antennas; The antenna is mounted on the housing and is communicatively connected to the sensor module, fan, and temperature and humidity controller. The antenna is used to wirelessly transmit the fan operating status, temperature and humidity monitoring data, and sensor module status information inside the enclosure to the backend, and to receive control signals from the backend.

[0023] Furthermore, the manufacturing process of the multi-layer composite structure plate includes: A transition layer is formed on the surface of the aluminum alloy base layer using a magnetron sputtering process to increase interlayer adhesion. A nickel-steel mesh structure is installed on the transition layer to form the high-permeability mesh intermediate layer, which is used to shield low-frequency magnetic fields. The outermost layer is formed by electroplating or physical-chemical vapor deposition to spray the electromagnetic reflective film, which is used to reflect electromagnetic waves.

[0024] Furthermore, the working logic of the dust removal control device is as follows: When the sensor module detects that the gas quality index exceeds the preset threshold, it connects the contactor coil, starts the high-frequency oscillation circuit and voltage multiplier circuit, so that the high-voltage electrostatic needle releases high-voltage static electricity to remove dust. When the sensor module detects that the gas quality index is lower than the preset threshold, it disconnects the contactor coil, stops the dust removal function, and enters a silent state.

[0025] Furthermore, the cross-sectional shape of the band-stop filter with the three-dimensional hollow polygonal columnar structure is designed based on the deformation of polygonal units. The aperture size of the polygonal units is set according to the waveguide cutoff principle to block electromagnetic waves in a specific frequency range from passing through while allowing air to circulate.

[0026] As can be seen from the above technical solution, compared with the prior art, the present invention discloses an outdoor high-potential electromagnetic shielded dust removal control box with trigger gap, which has the following beneficial effects: First, it balances shielding and lightweight design. It adopts a three-layer composite structure of "aluminum alloy + high permeability mesh + reflective film" and a magnetron sputtering transition layer process. While eliminating contact air gaps and ensuring efficient shielding across the entire frequency band, it significantly reduces the weight and cost of the enclosure, which is superior to traditional heavy or expensive solutions.

[0027] Secondly, the conflict between ventilation and shielding is resolved. The vent assembly is designed as a band-stop filter using the waveguide cutoff principle, which ensures airflow and heat dissipation while blocking electromagnetic leakage, completely eliminating the "slot antenna" effect.

[0028] Secondly, it features intelligent, low-power dust removal. Built-in sensors enable a "trigger gap" operating mode, activating high-voltage electrostatic adsorption of dust only when pollution levels exceed standards. It also has a fan reverse self-cleaning function, resulting in significant energy savings and reduced maintenance.

[0029] Finally, it exhibits strong environmental adaptability. Combined with a sloped rainproof and waterproof breathable membrane, and intelligent temperature and humidity control, it effectively copes with outdoor wind, rain, and condensation. Coupled with remote monitoring, it greatly enhances the reliability and safety of equipment operation under ultra-high voltage environments. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0031] Figure 1 The trigger gap is provided in the embodiment of the present invention as an external high-potential electromagnetic shielding dust removal control box; Figure 2 This is a schematic diagram of a band-stop filter with a three-dimensional hollow polygonal columnar structure provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the connection between the vent assembly and the housing provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the dust removal control device provided in an embodiment of the present invention; In the attached diagram: 1-box body, 2-ventilation vent assembly, 3-dust removal control device, 4-polymer waterproof one-way membrane, 5-rainproof cover, 6-fan, 7-temperature and humidity controller, 8-antenna. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] This invention discloses a trigger gap user-external high-potential electromagnetic shielding dust removal control box, referring to... Figure 1 As shown, it includes: Box 1, all six sides of box 1 are assembled from multi-layer composite panels, one of which has an opening; A vent assembly 2 is adapted to be installed at the opening, and the vent assembly 2 is a band-stop filter with a three-dimensional hollow polygonal columnar structure. A dust removal control device 3 connected to the vent assembly 2 and a polymer waterproof one-way membrane 4 disposed at the dust removal control device 3; The multi-layer composite structure of the plate consists of an aluminum alloy base layer, a high magnetic permeability mesh intermediate layer, and an electromagnetic reflection film surface layer, from the inside out. The dust removal control device 3 includes a sensor module and a high-voltage electrostatic generator module. The sensor module is used to monitor the moisture content and dust concentration in the air in real time, and controls the high-voltage electrostatic generator module to intermittently release high-voltage electrostatics for dust removal based on the monitoring results.

[0034] It also includes: a rain cover 5 located above the vent assembly 2, a fan 6 located between the dust removal control device 3 and the polymer waterproof one-way membrane 4, a temperature and humidity controller 7, and an antenna 8.

[0035] The components of the control box in this embodiment are described in detail below: This embodiment uses a multi-layer composite material fabricated by electroplating and physicochemical vapor deposition to process the enclosure 1, achieving efficient electromagnetic shielding and lightweight design across the entire frequency band; the multi-layer composite structure specifically includes: Aluminum alloy base layer: Serves as the basic support structure of the enclosure, providing mechanical strength and basic shielding capabilities.

[0036] High-permeability magnetic mesh intermediate layer: Composed of a nickel-steel mesh structure, specifically designed to absorb and shield low-frequency magnetic fields. This layer, a transition layer fabricated using magnetron sputtering, is mounted on the surface of the aluminum alloy base layer. The transition layer effectively increases interlayer adhesion, eliminates non-conductive air gaps caused by thermal expansion and contraction, and ensures shielding continuity.

[0037] Electromagnetic reflective film surface layer: Located on the outermost layer, it is mainly used to reflect high-frequency electromagnetic waves and prevent high-frequency interference from intruding.

[0038] The enclosure 1 in this embodiment includes six sides: a cover plate, a bottom plate, left and right side plates, a back plate, and a door plate. The cover plate is installed with a slope to facilitate the formation of condensation or dew on the cover plate when the temperature is low, and the water droplets can drip off from the edges.

[0039] In this embodiment, an opening is provided on the left side plate; the opening is constructed as a coaxial stepped through hole, which includes: The outer countersunk section extends from the outer surface of the box to the inside of the box to form an annular groove. The diameter of the outer countersunk section is larger than the diameter of the inner through-hole section, and the bottom of the outer countersunk section is an annular stepped surface. The inner through-hole section is coaxially connected to the outer countersunk hole section and penetrates the thickness of the box wall to form an air duct for air circulation. The frame base plate of the vent assembly 2 is adapted to be embedded in the outer countersunk hole section, and the edge of the frame base plate abuts against the annular step surface to achieve axial positioning.

[0040] The ventilation hole assembly 2 in this embodiment refers to... Figure 2 The image shows a band-stop filter with a three-dimensional hollow polygonal columnar structure. It includes a frame base plate and multiple three-dimensional hollow polygonal columnar units, all made of multi-layered composite sheet material. The three-dimensional hollow polygonal columnar structure is composed of multiple three-dimensional hollow polygonal columnar units. The unit shape is not limited to one type; it can be hexagonal, circular, or square. The length of the columnar units can be adjusted according to actual shielding and ventilation requirements.

[0041] In this embodiment, the vent assembly 2 is attached or snapped onto the outer countersunk section at the opening of the left side plate.

[0042] The design of this embodiment of a three-dimensional hollow polygonal columnar band-stop filter was derived through simulation calculations using the finite element analysis software COMSOL. This embodiment is based on a hexagonal structure with modifications. By simulating various different structures, the optimal shape was selected that can block specific electromagnetic waves while allowing some airflow. The ultimate goal is to use it as a band-stop filter to block electromagnetic waves within the cutoff frequency. Specifically, the principle is that a metal cavity, such as a coaxial cavity or waveguide cavity, forms a standing wave resonance at a certain frequency under specific dimensions, resulting in energy absorption or reflection. The aperture size of the polygonal structure is set according to the waveguide cutoff principle.

[0043] The three-dimensional hollow polygonal columnar band-stop filter in this embodiment has two functions: first, it prevents electromagnetic waves within the cutoff frequency from passing through the band-stop filter, maintaining electromagnetic shielding continuity with the housing 1; second, it serves as a connection channel between external air and the dust removal control device 3 for air exchange inside the housing 1. (Refer to...) Figure 3 As shown, the transition layer at the connection between the vent assembly 2 and the housing 1 is made using magnetron sputtering, which reduces contact resistance and non-wire air gap, thus lowering the installation difficulty.

[0044] The dust removal control device 3 in this embodiment is located inside the enclosure and is connected to the ventilation hole assembly 2. Traditional enclosures rely on dust filters to remove dust, but this only blocks large impurities such as poplar fluff floating in the air. The dust removal control device 3 in this embodiment has a low-power intelligent dust removal function. Specifically, it includes a sensor module and a high-voltage electrostatic generator module. The sensor module includes multiple laser sensors; the laser sensors in this embodiment use diodes as the light source and signal filtering circuit, resulting in stable signals and high resolution. Particles affect the propagation path and intensity of light, enabling the monitoring of gas quality. When the sensors detect PM2.5, PM10, or dust in the air, they control whether to activate the dust removal function, realizing the monitoring and improvement of environmental variables inside the enclosure.

[0045] The dust removal principle of the dust removal control device 3 in this embodiment is referred to Figure 4 As shown, the sensor module starts and stops the high-frequency oscillation and boost circuit by controlling the contactor (KM), and finally generates a high-voltage electrostatic field on the electrostatic needle.

[0046] Figure 3 The overall structure is divided into the following sections from left to right: power supply area, indicator area, high-frequency oscillation area, boost area, voltage doubler rectifier output area, and load area.

[0047] The power supply area includes the main circuit power supply, the control circuit power supply, the sensor module, and the contactor KM. The sensor module contains a signal processing circuit (such as a comparator or MCU). When PM2.5 / PM10 / dust exceeds the standard, this circuit is turned on, causing the coil of KM to be energized and attracted.

[0048] The indicator area includes indicator light GL and resistor R1; when the contacts of KM are closed, indicator light GL indicates that the equipment is powered on and working.

[0049] The high-frequency oscillation region includes transistor VT, resistor R2, and inductors L1 and L2; it is a self-excited push-pull or single-transistor oscillator circuit used to convert DC to high-frequency AC to drive the transformer. When the contacts of KM are closed, the power supply provides power to the collector of VT through L1. The voltage induced by L2 is applied to the base of VT through R2, causing it to conduct → the collector current increases → the magnetic field of L1 strengthens → L2 induces in the reverse direction → VT is cut off → this cycle repeats, forming a high-frequency oscillation (typically tens of kHz to hundreds of kHz).

[0050] The boost section includes inductor L3; the primary winding of the transformer is composed of L1 and L2 (or L1 is the main primary winding, and L2 is the auxiliary feedback winding). The secondary winding is L3, with far more turns than the primary winding, thus increasing the voltage. High-voltage AC is output from both ends of L3 and fed into the voltage multiplier rectifier circuit on the right.

[0051] The voltage multiplier rectifier output area includes diodes CT1-CT3 and capacitors C1-C3; it is a three-stage voltage multiplier rectifier circuit used to convert AC high voltage into higher DC high voltage. Specifically, it includes: First stage: Upper end of L3 → Anode of diode CT1 → Cathode of CT1 → Upper end of capacitor C1; Lower end of C1 is grounded; At the same time, the cathode of CT1 is also connected to the input point of the second stage.

[0052] Second stage: L3 lower end → diode CT2 anode → CT2 cathode → capacitor C2 upper end; C2 lower end is connected to C1 upper end (i.e., first stage output); at this time, the charging voltage of C2 is superimposed on C1.

[0053] Third stage: The upper end of L3 participates again → anode of diode CT3 → cathode of CT3 → upper end of capacitor C3; the lower end of C3 is connected to the upper end of C2 (i.e., the second stage output); the final output voltage is the sum of the voltages of the three capacitors.

[0054] The current-limiting resistor R3 is connected in series between the final output terminal and the "static needle". It is used to limit the short-circuit current, protecting the circuit and ensuring personal safety.

[0055] The load area includes electrostatic needles; the electrostatic needles, as high-voltage electrodes, generate a strong electric field (up to several thousand to tens of thousands of volts) at their tips, ionizing air molecules and adsorbing suspended particulate matter (PM2.5 / PM10 / dust) to achieve purification.

[0056] The working principle is as follows: The electrostatic dust removal switch is controlled by sensor signals. When monitoring changes in the concentration of moisture, PM10, and PM2.5 in the gas, the sensor uses a threshold analysis algorithm to determine whether the dust removal and dehumidification system needs to be activated. When poor gas quality is detected, the coil of contactor KM is energized, and the contacts of contactor KM are attracted and conduction occurs. The power indicator light illuminates first. After activation, the high-frequency oscillation circuit begins to work. The high-frequency voltage is boosted and then further increased by a voltage multiplier circuit. Subsequently, the voltage is applied to the electrostatic needle, triggering the dust removal function. When the sensor detects a decrease in concentration, the switch is deactivated, and the dust removal function is silenced, waiting to be triggered again, thus achieving low power consumption.

[0057] The polymer waterproof one-way membrane 4 in this embodiment allows only air to pass through, while moisture cannot penetrate it; it is commonly referred to as a waterproof and breathable membrane or breathable paper, and is a polymer composite material with a special microporous structure or hydrophilic groups.

[0058] In this embodiment, the rain cover 5 is located above the vent assembly 2; the top surface of the rain cover is designed with a slope. The rain cover 5 has two functions: first, to prevent rainwater from splashing onto the band-stop filter of the three-dimensional hollow polygonal columnar structure; and second, to allow water droplets adsorbed on the top layer of the rain cover to drip down the slope when the temperature is low, thus preventing them from dripping onto the band-stop filter of the three-dimensional hollow polygonal columnar structure.

[0059] In this embodiment, the fan 6 is positioned between the dust removal control device 3 and the polymer waterproof one-way membrane 4; it has two functions: first, under normal conditions, it can maintain the air exchange function of the chamber by operating silently or at low speed; second, when the dust removal device has accumulated a lot of dust and the ventilation function is not smooth, it can reverse the airflow to blow the dust out, thereby cleaning the passage.

[0060] In this embodiment, the temperature and humidity controller 7 uses a PTC temperature sensor; the temperature change causes a change in the sensor's resistance. The humidity sensor is a capacitive humidity sensor. When the temperature and humidity inside the box are unsuitable, it activates to improve the internal temperature and humidity.

[0061] Antenna 8 in this embodiment operates in half-duplex / full-duplex mode, transmitting monitored data wirelessly to the backend for processing. Due to the shielding effect of the enclosure, the operating status of the fan, the temperature and humidity monitoring module, and the sensor module within the enclosure are transmitted to the backend software via the antenna, allowing the backend to view the device's operating status. The antenna can also receive control signals to enable manual control from the backend to improve the operating environment and ensure the grounding trigger gap operates at its optimal state.

[0062] The control box in this embodiment is applied to the protection of high-voltage switchgear. It can achieve low-cost electromagnetic intrusion blocking capability, improve the current situation of low clean energy utilization and difficulty in real-time control of automatic purification and dust removal in existing control systems, and improve production efficiency and product reliability.

[0063] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0064] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A trigger gap user outdoor high-potential electromagnetic shielded dust removal control box, characterized in that, include: The enclosure is constructed from multi-layered composite panels on all six sides, with one side having an opening. A vent assembly adapted to be installed at the opening, wherein the vent assembly is a band-stop filter with a three-dimensional hollow polygonal columnar structure; A dust removal control device connected to the air vent assembly and a polymer waterproof one-way membrane disposed around the dust removal control device; The multi-layer composite structure of the plate comprises, from the inside out, an aluminum alloy base layer, a high magnetic permeability mesh intermediate layer, and an electromagnetic reflection film surface layer. The dust removal control device includes a sensor module and a high-voltage electrostatic generator module. The sensor module is used to monitor the moisture content and dust concentration in the air in real time, and controls the high-voltage electrostatic generator module to intermittently release high-voltage electrostatics for dust removal based on the monitoring results.

2. The trigger gap user outdoor high-potential electromagnetic shielded dust removal control box as described in claim 1, characterized in that, Also includes: A rain cover positioned above the ventilation hole assembly; The top surface of the rain cover is designed with a slope to guide condensed water droplets to drip off the edge and prevent rainwater from entering the vent assembly.

3. The trigger gap user outdoor high-potential electromagnetic shielding dust removal control box as described in claim 1, characterized in that, The ventilation hole assembly includes a frame base plate and multiple three-dimensional hollow polygonal columnar units.

4. The trigger gap user outdoor high-potential electromagnetic shielding dust removal control box as described in claim 1, characterized in that, The vent assembly is provided with a transition layer made by magnetron sputtering at the connection between the opening of the housing and the vent assembly. This layer is used to reduce contact resistance and eliminate non-conductive air gaps, thereby maintaining the continuity of the electromagnetic shielding of the housing.

5. The trigger gap user outdoor high-potential electromagnetic shielded dust removal control box as described in claim 1, characterized in that, Also includes: A fan, wherein the fan is disposed between the dust removal control device and the polymer waterproof one-way membrane; The fan is configured to have forward ventilation and reverse air blowing functions. When the air duct is detected to be poorly ventilated, reverse air blowing is performed to remove the dust adsorbed in the dust removal control device or air duct. The air duct is a channel for gas to enter and exit the housing, formed by the air vent assembly, dust removal control device and fan assembly.

6. The trigger gap user outdoor high-potential electromagnetic shielding dust removal control box as described in claim 1, characterized in that, Also includes: A temperature and humidity controller is installed inside the enclosure and is used to activate the adjustment function when the temperature and humidity inside the enclosure exceed a preset range.

7. A trigger gap user outdoor high-potential electromagnetic shielded dust removal control box as described in claims 5 and 6, characterized in that, Also includes: antenna; The antenna is mounted on the housing and is communicatively connected to the sensor module, fan, and temperature and humidity controller. The antenna is used to wirelessly transmit the fan operating status, temperature and humidity monitoring data, and sensor module status information inside the enclosure to the backend, and to receive control signals from the backend.

8. The trigger gap user outdoor high-potential electromagnetic shielding dust removal control box as described in claim 1, characterized in that, The manufacturing process of the multi-layer composite structure plate includes: A transition layer is formed on the surface of the aluminum alloy base layer using a magnetron sputtering process to increase interlayer adhesion. A nickel-steel mesh structure is installed on the transition layer to form the high-permeability mesh intermediate layer, which is used to shield low-frequency magnetic fields. The outermost layer is formed by electroplating or physical-chemical vapor deposition to spray the electromagnetic reflective film, which is used to reflect electromagnetic waves.

9. The trigger gap user outdoor high-potential electromagnetic shielding dust removal control box as described in claim 1, characterized in that, The working logic of the dust removal control device is as follows: When the sensor module detects that the gas quality index exceeds the preset threshold, it connects the contactor coil, starts the high-frequency oscillation circuit and voltage multiplier circuit, so that the high-voltage electrostatic needle releases high-voltage static electricity to remove dust. When the sensor module detects that the gas quality index is lower than the preset threshold, it disconnects the contactor coil, stops the dust removal function, and enters a silent state.

10. The trigger gap user outdoor high-potential electromagnetic shielding dust removal control box as described in claim 1, characterized in that, The cross-sectional shape of the band-stop filter with the three-dimensional hollow polygonal columnar structure is designed based on the deformation of polygonal units. The aperture size of the polygonal units is set according to the waveguide cutoff principle to block electromagnetic waves in a specific frequency range while allowing air to flow.

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