Power distribution box with strong electromagnetic interference resistance

Abstract

The application discloses a power distribution box with strong electromagnetic interference resistance, wherein each space in the box frame is provided with a honeycomb wallboard, and only one side of the honeycomb wallboard is provided with an electric appliance; a low-voltage area and a high-voltage area are arranged in two spaces of the box frame, and the electric appliance is arranged in the two spaces of the box frame in two directions to avoid electromagnetic interference, and meanwhile, enough space is reserved for ventilation and heat dissipation; a strong anti-magnetic component is arranged on the inner surface of an outer protective door and the surface of an inner door, the strong anti-magnetic component comprises a shielding layer made of a carbon nanotube and an epoxy resin composite material, there are groove arrays on the surface of the shielding layer, three-dimensional spiral channels (bionic nautilus logarithmic spirals) are arranged in the grooves of the groove arrays, a non-uniform curved surface is generated based on a reverse optimization algorithm of an electromagnetic vortex field, and high-performance electromagnetic shielding is realized through geometric topology optimization and bionic structure. The power distribution box with strong electromagnetic interference resistance solves the contradiction between high shielding requirement and high-power heat dissipation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of electrical technology, and particularly relates to a power distribution box resistant to strong electromagnetic interference. BACKGROUND

[0002] As an indispensable part of the power system, the main function of the electric cabinet is to distribute and control electric energy. Due to the complexity of the equipment and the diversity of the working environment, the power distribution cabinet often encounters electromagnetic compatibility (EMC) interference problems during use. These interferences can cause equipment failure, and can also have negative effects on the surrounding environment and other electronic equipment.

[0003] EMC interference is mainly divided into two categories: radiation interference and conducted interference. Radiation interference refers to the influence of electromagnetic waves on equipment through space propagation, while conducted interference is propagated through power lines or ground lines and other conductors. Various devices in the power distribution cabinet, such as frequency converters, relays and controllers, will produce different degrees of electromagnetic interference, so these factors need to be fully considered when designing and using the power distribution cabinet.

[0004] In the prior art, the commonly used techniques when considering electromagnetic interference include:

[0005] First, using partitions or metal shielding covers to physically isolate different areas to further enhance the anti-interference effect;

[0006] Second, for weak electric lines that are easily affected by electromagnetic interference, shielded cables should be preferred. The outer layer of shielded cables is composed of metal braid or metal foil, which can effectively block the interference of external electromagnetic fields.

[0007] Third, installing a power filter at the power inlet of the electric box can effectively filter out high-frequency interference signals in the power supply and reduce the impact on the equipment.

[0008] For the first, physical isolation is basically based on comprehensive enclosure, but the power distribution box has high resistance and high heat, which will affect the heat dissipation of the power distribution box and has great safety hazards; for the second, the shielding range of shielded cables is small, only partial shielding, so it cannot resist strong electromagnetic interference with a large range; for the third, in the complex process of electromagnetic compatibility design, the designer needs to fully consider multiple indicators of the filter, the design is complex, and the maintenance cost is also high.

[0009] In general, the above three are good choices for places where strong electromagnetic requirements are not high, but if the best anti-strong electromagnetic interference effect is required, with the rapid development of the oil, chemical, and other industries, explosion-proof distribution boxes are used more and more widely in production, storage, and rescue, and the variety is more and more. How to prevent the accidental explosion of the explosion-proof distribution box in the explosive gas dangerous place has become a very important topic, so a better distribution box is needed. For this demand, we can combine the above three structures of the distribution box, but there are still some problems, such as using shielding materials to surround part of the electrical equipment or the entire cabinet, resulting in poor heat dissipation effect of the distribution box, and using power filters and other components, materials, and installation design add power consumption, so a technology that adapts to new demands is proposed. SUMMARY

[0010] In view of the shortcomings of the prior art, the purpose of the present application is to provide an explosion-proof distribution box with strong anti-electromagnetic interference.

[0011] To achieve the foregoing purposes of the application, the technical solution adopted by the present application comprises: an explosion-proof distribution box with strong anti-electromagnetic interference, comprising:

[0012] The box frame has a base at the bottom, the base is wide and stable, and supports the entire distribution box, and the box frame is a frame body with four sides.

[0013] The partition assembly is installed in the middle of the box frame, dividing the box frame into two spaces, and each space in the box frame has a honeycomb wallboard, and the opposite sides of the two honeycomb wallboards are used to install electrical appliances, and the electrical appliances are installed in two directions in the box frame, and only one side of each honeycomb wallboard is used to install electrical appliances, and the honeycomb wallboard further comprises a mounting assembly, and the mounting assembly comprises a plurality of strip-shaped reinforcing plates and a plurality of positioning bolts. Compared with the prior art, the honeycomb plate is usually used for filtering, ventilation, or shielding purposes, and is basically not used for installing electrical components, and is generally used as a door or window, and the product of the present application directly uses the honeycomb plate and the honeycomb wallboard as a mounting plate to install electrical appliances, with the purpose of increasing the contact area between the electrical appliances and the air and increasing the flowability; therefore, the product of the present application uses the honeycomb wallboard (the honeycomb wallboard is regarded as a ventilated wall body) as a ventilated wall body, and electrical appliances are installed on both sides to distribute the electrical appliances, and the heat generated by the electrical appliances is also distributed.

[0014] The low-voltage and high-voltage zones are respectively located in two spaces within the enclosure. Electrical appliances are installed in these two spaces from opposite directions, effectively separating the low-voltage and high-voltage zones to prevent electromagnetic interference. Sufficient space is also provided for ventilation and heat dissipation, facilitating safe use and maintenance of the equipment. Existing distribution box designs that separate high-voltage and low-voltage zones all place them in the same space. Some use partitions to separate high and low voltage areas, while others directly install shielded boxes within this space to divide a single distribution box into low-voltage and high-voltage zones. However, these two assembly structures result in all electrical appliances sharing a single space, and the appliances, switches, and wires are all concentrated in this space, making it cramped, concentrating heat, and resulting in lower heat dissipation efficiency compared to the design of this invention.

[0015] The door assembly consists of two sets, installed on opposite sides of the box frame. Opening and closing them allows for spatial connection or isolation. Each distribution box has a door; here we'll modify a standard door:

[0016] Each door assembly includes an inner door, an outer protective door, an antimagnetic and breathable assembly, a noise reduction and protection connection assembly, and an exhaust fan. The outer protective door is installed outside the inner door. Both the inner surface of the outer protective door and the surface of the inner door are equipped with strong antimagnetic assemblies. The strong antimagnetic assembly includes a shielding layer made of carbon nanotubes and epoxy resin composite material. The surface of the shielding layer has a groove array distributed on it. A three-dimensional spiral channel (bionic nautilus logarithmic spiral) is set in the groove of the groove array. The non-uniform curved surface is generated based on the inverse optimization algorithm of electromagnetic eddy current field. High-performance electromagnetic shielding is achieved through geometric topology optimization and bionic structure.

[0017] There is a gas flow gap between the outer door and the inner door to increase the airflow inside the distribution box. The outer door has a middle section that protrudes outward to guide the airflow and forms a low-pressure structure on both sides. The low-pressure parts on both sides are located at the gas outlet of the gas flow gap, which draws out the gas inside the box frame to dissipate heat from the distribution box. The gas outlet of the gas flow gap is opened on the left and right sides of the box frame. The inner door has a door vent that allows gas to flow out, and the door vent is set to face outward.

[0018] A sealing device is installed between the bottom of the inner door and the outer protective door. The noise reduction and protection connection assembly is used to connect the top of the inner door and the top of the outer protective door, sealing the part between the top of the inner door and the top of the outer protective door. Two sets of antimagnetic and breathable components are provided, which are installed at the gas outlet of the gas flow gap, allowing gas to flow out while blocking electromagnetic waves from flowing out of the wiring box, and also blocking electromagnetic waves from entering from outside the wiring box.

[0019] Each door assembly is equipped with a latch assembly, which locks the door assembly to the frame. The latch assembly lock body is installed on the frame, and the latch is installed on the inner door.

[0020] In this invention, electrical appliances are installed on two sides of the honeycomb wall panel according to low voltage and high voltage respectively, which disperses the appliances and prevents them from clustering together. The honeycomb wall panel has a porous structure, which is conducive to the rapid dissipation of heat. At the same time, the honeycomb structure of the honeycomb wall panel is relatively strong and can stably support the appliances. In addition, the noise and electromagnetic waves generated during the operation of the appliances can also be canceled out by the porous structure of the honeycomb wall panel, which has the functions of noise reduction and enhanced antimagnetic effect.

[0021] In this invention, the traditional single door is replaced with a door assembly that is heat-dissipating, breathable, and antimagnetic. The combination of the outer protective door and the inner door helps to dissipate the gas inside the distribution box. At the same time, it provides a relatively large space to install strong antimagnetic components and antimagnetic breathable components, which can refract external electromagnetic fields, enhance antimagnetism, and avoid affecting the operation of electrical appliances.

[0022] Furthermore, the outer protective door has a structure that bulges outward from the center. As the heat inside the distribution box increases, the air pressure decreases, and the internal gas dissipates outward through various openings, vents, and flow channels of the product. When wind blows across the product, it first flows through the bulging structure of the outer protective door, which disperses the airflow to both sides of the door assembly, creating a pressure difference at the gas outlets on both sides. This pressure difference between the inside and outside of the box promotes gas flow, completing gas replacement within the box without power, thus achieving heat dissipation. The antimagnetic permeable component includes several evenly arranged and interconnected tubes. One end of each tube is located within the gas flow gap, serving as an air inlet, and the other end is located at the gas outlet of the gas flow gap, serving as an exhaust outlet. The end of the tube at the gas outlet of the gas flow gap slopes downward; the downward slope is intended to... This design prevents wind and rain from blowing back into the distribution box and also blocks electromagnetic waves. The exhaust fan is installed on the outward-protruding section in the middle. The fan blows outside air towards the outer door, creating a pressure difference at the gas outlets on both sides of the protruding structure. This pressure difference between the inside and outside of the box promotes airflow. While existing technologies use multiple fans for cooling, these fans themselves generate heat, and they require airflow for effective cooling. Furthermore, in confined spaces with numerous electrical wires and other products, the heat generated is high, and fan cooling at high temperatures is limited. Therefore, this invention uses an exhaust fan for each door assembly, combined with the pressure difference created at the gas outlets on both sides of the protruding structure. This pressure difference between the inside and outside of the box promotes airflow, resulting in a large volume of airflow for cooling the electrical equipment. In addition, the exhaust fan itself also generates electromagnetic fields, so placing it on the outside of the product of this invention will not increase electromagnetic interference. At the same time, it also takes advantage of the structure to achieve better heat dissipation performance without the need for more fans. Strong antimagnetic components are provided on the inner surface of the outer door and the surface of the inner door to further enhance the antimagnetic performance.

[0023] The casing is also equipped with a reflector, which reflects electromagnetic waves diffracted into the casing to the exhaust port. The outward-protruding surface of the outer door disperses the airflow to both sides, creating a low pressure on both sides, which in turn produces an adsorption effect, drawing out the gas from the low-pressure box frame. As long as there is airflow, there will be an air pressure difference. The design of the four exhaust ports and the internal space of the wiring box is also conducive to heat dissipation. Moreover, the casing structure is made of the thinnest and lightest material. After one or two sets of structures are installed between the inner door and the outer door, the whole structure will not be bulky. Furthermore, due to the large number of casings, the wind deformation resistance of the door assembly is increased. Combined with the outward protrusion of the middle section of the outer door, the deformation resistance is also greatly enhanced.

[0024] Furthermore, the anti-reflection assembly includes a first reflector and a second reflector, which are disposed on opposite inner walls within the tube housing. Both the first and second reflectors are installed inside the tube housing and are perpendicular to the axis of the tube housing. The free ends of the first and second reflectors overlap each other, meaning that the first reflector extends to the front of the second reflective surface, and the second reflector extends to the front of the first reflective surface. The gap between the first and second reflectors forms a fluid channel, through which the gas in the distribution box is finally discharged from the exhaust port. Here, one first reflector and one second reflector are each disposed close to each other to better shield electromagnetic fields.

[0025] Furthermore, both the first and second reflectors include an amorphous alloy fiber mesh framework and a composite layer of graphene aerogel and liquid metal coated on its outer surface. The long-range disordered structure of the amorphous alloy fiber mesh framework endows it with ultra-high magnetic permeability and nanoscale soft magnetic properties, effectively guiding magnetic shunting of low-frequency magnetic fields. The 65% porosity design of the amorphous alloy fiber mesh framework forms a three-dimensional magnetic flux channel, which not only reduces weight but also enhances high-frequency eddy current loss through the magnetic domain wall pinning effect at the fiber nodes. The graphene aerogel has an ultra-low density (0.16 g / cm³) three-dimensional network structure, which absorbs high-frequency electromagnetic waves through localized plasma resonance. After the liquid metal is injected into the pores of the aerogel, a reconfigurable conductive network is formed, which can self-repair conductive pathways when deformed by external forces.

[0026] Furthermore, it also includes an installation component, which consists of several strip-shaped reinforcing plates and several positioning bolts. Each reinforcing plate has several mounting holes corresponding to the honeycomb holes. The positioning bolts can pass through the mounting holes and the corresponding honeycomb holes, and finally through the bolt holes of the electrical appliances to be installed, thus fixing the electrical appliances to the honeycomb wall panel. The reinforcing plates are horizontal strips, and the length of the reinforcing plates can accommodate multiple electrical appliances. Multiple sets of positioning bolts are set accordingly. This structural design enhances connection stability while reducing obstruction of the honeycomb holes in the honeycomb wall panel and reducing the impact of the wall surface on airflow.

[0027] Furthermore, the noise reduction and protection connection component is a retractable accordion cover, which can adopt the simplest style, allowing the door component to be easily opened and closed by retracting.

[0028] Furthermore, the casing can be a round tube or a rectangular tube. If the purpose is to facilitate the production and assembly of the first and second reflectors, a rectangular tube is the most suitable.

[0029] Furthermore, the outer door has a V-shaped structure, with the virtual line in the middle section perpendicular to the horizontal line and the apex facing outwards.

[0030] Furthermore, the partition components are installed horizontally or vertically in the middle of the box frame.

[0031] Furthermore, one end of the inner door is pivotally connected to one end of the box frame via a metal spring, and the gap between the inner door and the box frame is sealed by a metal spring, thereby improving the electromagnetic wave shielding function.

[0032] Compared with the prior art, the advantages of the present invention include:

[0033] (1) The present invention provides a distribution box that resists strong electromagnetic interference. The space of the distribution box is redesigned, the electrical appliances are partitioned and installed separately, and a porous heat dissipation honeycomb wall panel is boldly used to install electrical appliances to increase gas flow, so that the distribution box of the present invention has good heat dissipation.

[0034] (2) The present invention provides a distribution box that resists strong electromagnetic interference. The cooperation of components such as honeycomb wall panel, strong antimagnetic component, antimagnetic breathable component, and noise reduction and protection connection component does not affect the heat dissipation of the distribution box, and at the same time has the function of high anti-electromagnetic wave. Moreover, most of the entire structure is mechanical structure. Except for the fan, there is no power consumption. After installation, maintenance is relatively simple.

[0035] (3) The present invention provides a distribution box for resisting strong electromagnetic interference. The door assembly is set on both sides of the distribution box. The electrical appliances are installed separately and vertically in the frame. The honeycomb wall panel is used to separate the high and low voltage electrical components, making the electrical components easy to install, the cables easy to manage, and the maintenance simple. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is an overall schematic diagram of a power distribution box resistant to strong electromagnetic interference according to the present invention;

[0038] Figure 2 This is a schematic diagram of a door assembly for a distribution box resistant to strong electromagnetic interference according to the present invention;

[0039] Figure 3 This is a schematic diagram of the casing of a distribution box resistant to strong electromagnetic interference according to the present invention.

[0040] Figure 4 This is a schematic diagram of the first and second reflectors of a distribution box for resisting strong electromagnetic interference according to the present invention;

[0041] Figure 5 This is a schematic diagram of the installation components of a distribution box that resists strong electromagnetic interference according to the present invention.

[0042] Figure label:

[0043] 11. Box frame; 12. Partition assembly; 13. Honeycomb wall panel; 14. Low-pressure area; 15. High-pressure area; 16. Door assembly; 17. Inner door; 18. Outer protective door; 19. Antimagnetic and breathable assembly; 20. Noise reduction and protection connection assembly; 21. Door vent; 22. Gas flow gap; 23. Locking assembly; 25. Pipe shell; 26. Air inlet; 27. Exhaust outlet; 28. First reflector; 29. ​​Second reflector; 30. Mounting assembly; 31. Positioning bolt; 32. Mounting hole; 33. Fan; 34. Shielding layer; 35. Groove array; 36. Three-dimensional spiral channel; 37. Amorphous alloy fiber mesh skeleton; 38. Composite layer. Detailed Implementation

[0044] In view of the shortcomings of the prior art, the inventors of this invention, through long-term research and extensive practice, have proposed the technical solution of this invention. The technical solution, its implementation process, and principles will be further explained below with reference to the accompanying drawings and specific implementation examples in the embodiments of this application.

[0045] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, the present invention covers any substitutions, modifications, equivalent methods and solutions made on the spirit, principles and scope of the present invention as defined by the claims. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] In the description of this application, the terms "first," "second," "third," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," and similar words, do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including," and similar words, mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. The terms "connected" or "linked," and similar words, are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0047] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, when using positional terms such as "both sides," "outer side," and "upper and lower," it should be understood that they are used only for ease of understanding and description, taking into account that the structure may be oriented to other positions.

[0048] In the description of this application, unless otherwise expressly specified and limited, the technical or scientific terms used shall have the ordinary meaning understood by a person with ordinary skills in the art to which this application pertains. Terms such as “installation,” “connection,” and “joining” shall be interpreted broadly, for example, as fixed connection, detachable connection, mating connection, or integral connection. For a person skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0049] The present invention aims to introduce and explain the structural composition of a distribution box resistant to strong electromagnetic interference and the coordination relationship between the various components. Unless otherwise specified, the dimensions, materials and manufacturing processes of the various components in the distribution box suitable for resisting strong electromagnetic interference in the present invention can be selected according to specific circumstances, and no special limitations or explanations are made here.

[0050] Furthermore, to provide the public with a better understanding of the present invention, certain specific details are described in detail in the following description of the invention. However, those skilled in the art will fully understand the invention even without these detailed descriptions.

[0051] Example 1

[0052] Please see Figure 1 andFigure 2 A distribution box resistant to strong electromagnetic interference includes a box frame 11, a partition assembly 12, a low-voltage area 14 and a high-voltage area 15, a door assembly 16, and a latch assembly 23.

[0053] The bottom of the box frame 11 has a base. The base is wide and provides stable support for the entire distribution box. The box frame 11 is a frame with four sides.

[0054] The partition assembly 12 is installed in the middle of the box frame 11, dividing the box frame 11 into two spaces. Each space in the box frame 11 is equipped with a honeycomb wall panel 13. The opposite sides of the two honeycomb wall panels 13 are used to install electrical appliances. That is, each honeycomb wall panel 13 has only one side for installing electrical appliances, thus dividing the electrical appliances into two directions. The honeycomb wall panel also includes a mounting assembly, which includes several strip-shaped reinforcing plates and several positioning bolts. The partition assembly 12 can be installed horizontally or vertically in the middle of the box frame 11. The two honeycomb panels are stacked on both sides of the partition assembly 12 with the partition assembly 12 as the axis of symmetry. Preferably, the two honeycomb panels are installed on the top and bottom surfaces of the box frame 11, respectively. Generally, the wiring box is vertically elongated, so the vertical division makes it more convenient to install electrical appliances.

[0055] Low-voltage zone 14 and high-voltage zone 15 are respectively set in two spaces of the enclosure 11. Electrical appliances are installed in two directions in two spaces of the enclosure 11 to separate low-voltage zone 14 and high-voltage zone 15, avoid electromagnetic interference, and at the same time leave enough space for ventilation and heat dissipation. Separating low-voltage zone 14 and high-voltage zone 15 facilitates safe use and maintenance of equipment.

[0056] The door assembly 16 has two sets, which are respectively installed on both sides of the box frame 11, and the opening and closing can realize the connection or isolation of the space;

[0057] Each door assembly 16 includes an inner door 17, an outer protective door 18, an antimagnetic and breathable assembly 19, a noise reduction and protection connection assembly 20, and an exhaust fan 33. One end of the inner door 17 is pivotally connected to one end of the frame 11 via a metal spring, that is, the inner door is pivotally connected to the frame 11 and the gap is sealed by the metal spring, which improves the electromagnetic wave shielding function. The inner surface of the outer protective door and the surface of the inner door are both provided with strong antimagnetic components. The strong antimagnetic components include a shielding layer 34 made of carbon nanotubes and epoxy resin composite material. The surface of the shielding layer has a groove array 35 (composed of several array grooves). The groove depth is modulated according to λ / 4 (the wavelength of the electromagnetic wave in the target frequency band) to form a waveguide resonant cavity, so that the electromagnetic wave in the specific frequency band resonates in the groove. Destructive interference occurs within the grooves, and the groove array increases the electromagnetic wave scattering path, improving multiple reflection loss. A three-dimensional spiral channel 35 (biomimetic nautilus logarithmic spiral) is set within the grooves of the array. The gradual curvature of the logarithmic spiral guides electromagnetic eddy currents along the spiral path, avoiding localized heat loss caused by concentrated eddy currents. The spiral structure generates a demagnetization effect, canceling external low-frequency magnetic fields through a self-induced magnetic field. A strong antimagnetic component is prepared using epoxy resin (type 618) as the matrix and carbon nanotubes (single-walled carbon nanotubes and multi-walled carbon nanotubes) as dopants, resulting in a carbon nanotube / epoxy resin composite material. When the content of single-walled carbon nanotubes reaches 15%, the electromagnetic shielding performance reaches 49.2 dB at 10 MHz. With a single-walled carbon nanotube content of 15%, the electromagnetic shielding performance is between 15 and 20 dB in the 200 MHz–1.5 GHz range. At frequencies of 8.2–12.4 GHz, when the SWNT content reaches 15%, the shielding performance exceeds 20 dB. When the SE reaches about 20 dB (equivalent to 99% attenuation), it can basically meet the requirements of civilian facilities for suppressing electromagnetic interference (EMI) and radio frequency interference (RFI).

[0058] The outer protective door 18 is installed outside the inner door 17. A gas flow gap 22 exists between the outer protective door 18 and the inner door 17. The outer protective door 18 has a middle section that protrudes outwards to guide airflow and forms a low-pressure structure on both sides. The low-pressure sections on both sides are located at the gas outlets of the gas flow gap 22, drawing out the gas from the box frame 11 to dissipate heat from the distribution box. The outlets of the gas flow gap 22 are located on the left and right sides of the box frame 11. The inner door 17 has an air vent that allows gas to flow out, facing outwards to reduce electromagnetic interference. The bottoms of the inner door 17 and the outer protective door 18 are sealed together using components made of electromagnetic shielding material. An induced draft fan is installed. At the outward-protruding section in the middle, the exhaust fan blows outside air towards the outer door. After passing through the protruding structure of the outer door, a pressure difference is formed at the gas outlets on both sides. Utilizing the pressure difference between the inside and outside of the box, airflow is promoted. Although existing technologies also use multiple fans for heat dissipation, the fans themselves generate heat, and they require sufficient airflow space for effective heat dissipation. In addition, when space is limited and there are many electrical appliances and wires, the heat is high, and the fan's heat dissipation at high temperatures is only average. Therefore, this invention uses an exhaust fan for each door assembly, plus the air pressure difference formed at the gas outlets on both sides of the protruding structure. Utilizing the pressure difference between the inside and outside of the box promotes airflow, and the two work together to achieve a large volume of airflow. In addition, the exhaust fan itself also generates electromagnetic fields, so placing it on the outside of the product of this invention will not increase the electromagnetic interference of the product of this invention. At the same time, it can achieve better heat dissipation performance by utilizing the structural advantages without needing to set up more fans. Strong antimagnetic components are set on the inner surface of the outer door and the surface of the inner door to further enhance the antimagnetic performance. Preferably, the exhaust fan in each door assembly is set to correspond to the nearest electrical appliance position to reduce obstruction of heat dissipation of electrical appliances in the opposite area of ​​the honeycomb wall panel 13.

[0059] The noise reduction and protection connection assembly 20 is used to connect the top of the inner door 17 and the top of the outer door 18, sealing the part between the top of the inner door 17 and the top of the outer door 18. The noise reduction and protection connection assembly 20 is also made of electromagnetic shielding material to enhance the anti-electromagnetic capability. The anti-magnetic breathable assembly 19 is provided in two sets, which are respectively installed at the gas outlet of the gas flow gap 22. While allowing gas to flow out, it blocks electromagnetic waves from flowing out of the wiring box, and also blocks electromagnetic waves from entering from outside the wiring box.

[0060] The latch assembly 23 is provided for each door assembly 16. The latch assembly 23 locks the door assembly 16 to the frame 11. The lock body of the latch assembly 23 is installed on the frame 11, and the latch is installed on the inner door 17. Any lock available on the market can be used. Alternatively, the latch can be installed on the frame 11 and the lock body can be installed on the inner door 17.

[0061] Several magnetic ring filters 24 are provided and are respectively installed on the part of the isolation assembly 12 extending into the air port to suppress electromagnetic interference (EMI) and radio frequency interference (RFI) and enhance the anti-electromagnetic interference performance of the product of the present invention.

[0062] Example 2

[0063] The difference from Example 1 is as follows: Please refer to Figure 2 and Figure 3 The outer protective door 18 has a structure that bulges outward from the middle, making it a V-shaped structure. The virtual line in the middle section of the outer protective door 18 is perpendicular to the horizontal line. The antimagnetic and breathable component 19 includes several uniformly arranged and interconnected tube shells 25. Preferably, the tube shells 25 are round or rectangular tubes. One end is located inside the gas flow gap 22 and serves as the air inlet 26. The other end is located at the outlet of the gas flow gap 22 and serves as the exhaust port 27. The end of the tube shell 25 located at the outlet of the gas flow gap 22 is inclined downward. The downward inclination is intended to prevent wind and rain from blowing back into the distribution box and also serves as a barrier. When electromagnetic waves enter, an anti-reflection component is installed inside the tube shell. The anti-reflection component is used to reflect the electromagnetic waves diffracted into the tube shell 25 to the exhaust port 27 for discharge. The outward protruding surface of the outer protective door 18 can disperse the airflow when the outside flows over the protruding surface to both sides, forming a high-speed fluid on both sides and a low pressure on both sides, thereby generating an adsorption effect, which in turn draws out the gas in the low-pressure box frame 11. The design of this invention will have an air pressure difference as long as there is wind flow. The design of the overall structure of the fan 33, the four exhaust ports 27 in the wiring box, and the honeycomb wall panel 13 is also conducive to heat dissipation.

[0064] In one embodiment of the present invention, the anti-reflection assembly includes a first reflective plate 28 and a second reflective plate 29 made of electromagnetic screen material. The first reflective plate 28 and the second reflective plate 29 are disposed on opposite inner walls inside the tube housing 25. Both the first reflective plate 28 and the second reflective plate 29 are vertically installed inside the tube housing 25, that is, perpendicular to the virtual axis of the tube housing 25. The free ends of the first reflective plate 28 and the second reflective plate 29 have overlapping portions, that is, the first reflective plate 28 extends partially to the front of the second reflective surface, and the second reflective plate 29 extends partially to the first reflective surface. In front of the flow, the fluid must be reflected by the first or second reflector 29 before it can flow. The gap between the first reflector 28 and the second reflector 29 forms a fluid channel. The gas in the distribution box is finally discharged from the exhaust port 27 through the fluid channel. The lower end of the casing 25 is inclined downward and outward, and the upper end is inclined towards the inner door 17 to prevent wind and rain from flowing into the distribution box through the casing 25. From the perspective of electromagnetic wave diffraction, the parallel arrangement of the first reflector 28 and the second reflector 29 provides the greatest obstruction and prevents electromagnetic waves from passing through the casing 25.

[0065] As one embodiment of the present invention, please refer toFigure 4 Both the first reflector 28 and the second reflector 29 include an amorphous alloy fiber mesh framework 37 and a composite layer 38 of graphene aerogel and liquid metal coated on the amorphous alloy fiber mesh framework. The long-range disordered structure of the amorphous alloy fiber mesh framework endows it with ultra-high magnetic permeability (initial μᵢ>10,000) and nanoscale soft magnetic properties, effectively guiding and shunting low-frequency magnetic fields. The 65% porosity design of the amorphous alloy fiber mesh framework forms a three-dimensional magnetic flux channel, which reduces weight and enhances high-frequency eddy current loss through the magnetic domain wall pinning effect at fiber nodes. The graphene aerogel has an ultra-low density (0.16 g / cm³) three-dimensional network structure, which absorbs high-frequency electromagnetic waves through localized plasmon resonance. After the liquid metal is injected into the pores of the aerogel, it forms a reconfigurable conductive network that can self-repair conductive pathways when deformed by external forces. The liquid metal endows the material with self-healing ability, and the shielding effectiveness can be restored after scratches.

[0066] Example 3

[0067] The difference from Example 1 is as follows: Please refer to Figure 5 It also includes an installation component 30, which includes several strip-shaped reinforcing plates and several positioning bolts 31. Each reinforcing plate has several mounting holes corresponding to the honeycomb holes. The positioning bolts 31 can pass through the mounting holes and the corresponding honeycomb holes, and finally through the bolt holes of the electrical appliances to be installed, thus fixing the electrical appliances to the honeycomb wall panel 13. The reinforcing plates are horizontal strips and can install multiple electrical appliances. The positioning bolts 31 are set in multiple sets accordingly. This design enhances the connection stability and reduces the obstruction of the honeycomb holes of the honeycomb wall panel 13.

[0068] Example 4

[0069] The difference from Embodiment 1 is that the noise reduction and protection connection component 20 is a telescopic bellows cover that can extend and retract in conjunction with the opening and closing action of the door component 16, which can protect the distribution box from wind and rain. At the same time, the uneven outer surface can also cancel out the reflected electromagnetic waves and noise.

[0070] Working principle:

[0071] Spatial partitioning and isolation: The partition components divide the enclosure into a high-voltage zone and a low-voltage zone, which, together with the honeycomb wall panels (metal material) on both sides, form an independent Faraday cage, blocking the electromagnetic coupling path through metal continuity;

[0072] Double shielding of the door ： The outer protective door and the inner door are equipped with an antimagnetic and breathable component to counteract the external low-frequency magnetic field and reflect the incident electromagnetic wave to the exhaust port for dissipation through a multi-level anti-refracting plate (such as an interlaced first / second reflector plate), which greatly improves the shielding effectiveness.

[0073] Bernoulli effect diversion ：The V-shaped protrusion structure of the outer protective door accelerates the airflow and creates a negative pressure zone on the outlet side of the gas flow gap, actively drawing in hot air from the chamber.

[0074] Antimagnetic waveguide ventilation ： The downward-sloping design of the casing prevents rain and backflow, while the internal anti-reflective components form a labyrinthine air duct that combines electromagnetic wave blocking and airflow conduction. The porous structure of the honeycomb wall panel increases the heat dissipation area, while high-frequency electromagnetic waves generate eddy current losses on the pore walls.

[0075] Both the first and second reflectors include an amorphous alloy fiber mesh skeleton and a composite layer of graphene aerogel and liquid metal coated on the amorphous alloy fiber mesh skeleton, which effectively conducts magnetic flux and shunts low-frequency magnetic fields, suppressing conduction interference.

[0076] It is understood that the structural design of this invention has the following advantages:

[0077] Improved reliability: Zoned design (high-voltage / low-voltage isolation) reduces the risk of cascading failures and improves maintenance safety;

[0078] Energy efficiency optimization: Only one fan is needed, reducing power consumption and overall energy consumption, while also reducing electromagnetic interference;

[0079] Extended lifespan: The bellows cover provides dust protection, while the waveguide design prevents moisture and slows down component corrosion.

[0080] By optimizing the electromagnetic-thermal-mechanical multiphysics coupling, the contradiction between high shielding requirements and high-power heat dissipation is resolved, providing a high-reliability solution for scenarios such as explosive gas hazardous fields and military electronics.

[0081] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It should not be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A distribution box resistant to strong electromagnetic interference, characterized in that, include: A box frame, wherein the bottom of the box frame has a base; A partition assembly is installed in the middle of a box frame, dividing the box frame into two spaces. Each space in the box frame has a honeycomb wall panel. The opposite sides of the two honeycomb wall panels are used for installing electrical appliances. Only one side of each honeycomb wall panel is used for installing electrical appliances. The honeycomb wall panel also includes a mounting assembly, which includes several strip-shaped reinforcing plates and several positioning bolts. The low-pressure zone and the high-pressure zone are respectively located in two spaces of the box frame; The door assembly has two sets, which are respectively installed on both sides of the box frame to realize the connection or isolation of space by opening and closing; Each of the door components includes an inner door, an outer protective door, a strong antimagnetic component, an antimagnetic breathable component, a noise reduction and protection connection component, and an exhaust fan. The inner surface of the outer protective door and the surface of the inner door are both provided with strong antimagnetic components. The strong antimagnetic component includes a shielding layer made of carbon nanotubes and epoxy resin composite material. The surface of the shielding layer is provided with a groove array, and a three-dimensional spiral channel is provided in the groove of the groove array. The outer protective door is installed on the outside of the inner door. A gas flow gap exists between the outer and inner doors. The outer protective door has a middle section that protrudes outwards to guide airflow and forms a low-pressure structure on both sides. The low-pressure sections on both sides are located at the gas outlet of the gas flow gap, drawing gas out of the box frame to dissipate heat from the distribution box. The gas outlet of the gas flow gap is located on the left and right sides of the box frame. The inner door has a door vent that allows gas to flow out, facing outwards. The bottoms of the inner and outer protective doors are sealed together. The noise reduction and protection connection assembly connects the top of the inner door and the top of the outer protective door, sealing the portion between them. Two sets of antimagnetic permeable components are provided, each installed at the gas outlet of the gas flow gap. The induced draft fan is installed on the middle section that protrudes outwards. Strong antimagnetic components are provided on the inner surface of the outer protective door and the surface of the inner door. Each door assembly is equipped with a latch assembly that locks the door assembly to the frame.

2. The distribution box for resisting strong electromagnetic interference according to claim 1, characterized in that: The outer protective door has a structure that bulges outward from the center. The antimagnetic and breathable component includes several uniformly arranged and interconnected tube shells. One end of each tube shell is located in the gas flow gap and serves as the air inlet, while the other end is located at the gas outlet of the gas flow gap and serves as the exhaust outlet. The end of the tube shell located at the gas flow gap outlet is inclined downward. A reflective component is also provided inside the tube shell. The reflective component is used to reflect the electromagnetic waves diffracted into the tube shell to the exhaust outlet for discharge. The outward bulging surface of the outer protective door disperses the airflow from the outside to both sides, creating a low pressure on both sides, thereby generating an adsorption effect and drawing out the gas from the low-pressure box frame.

3. A distribution box resistant to strong electromagnetic interference according to claim 2, characterized in that: The anti-reflection assembly includes a first reflector and a second reflector, which are disposed on opposite inner walls inside the tube shell. Both the first and second reflectors are installed inside the tube shell and are perpendicular to the axis of the tube shell. The free ends of the first and second reflectors overlap each other, and a fluid channel is provided between the first and second reflectors.

4. A distribution box resistant to strong electromagnetic interference according to claim 3, characterized in that: Both the first and second reflectors include an amorphous alloy fiber mesh skeleton and a composite layer of graphene aerogel and liquid metal coated on their outer surface.

5. A distribution box resistant to strong electromagnetic interference according to claim 1, characterized in that: Each of the reinforcing plates has several mounting holes corresponding to the honeycomb holes. The positioning bolts can pass through the mounting holes and the corresponding honeycomb holes, and finally through the electrical bolt holes to be installed, thus fixing the electrical appliances to the honeycomb wall panel.

6. A distribution box resistant to strong electromagnetic interference according to claim 1, characterized in that: The noise reduction and protection connection component is a retractable accordion cover.

7. A distribution box resistant to strong electromagnetic interference according to claim 2, characterized in that: The tube shell is a round tube or a rectangular tube.

8. A distribution box resistant to strong electromagnetic interference according to claim 1, characterized in that: The outer protective door has a V-shaped structure, and the virtual line in the middle section of the outer protective door is perpendicular to the horizontal line.

9. A distribution box resistant to strong electromagnetic interference according to claim 1, characterized in that: The partition assembly is installed horizontally or vertically in the middle of the box frame.

10. A distribution box resistant to strong electromagnetic interference according to claim 1, characterized in that: One end of the inner door is pivotally connected to one end of the box frame by a metal spring.

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