A direct current lighting distribution cabinet

Abstract

The embodiment of the application provides a direct current lighting power distribution cabinet, the direct current lighting power distribution cabinet, including cabinet, door body, direct current relay, inner door, control unit, trigger switch and test power supply;The door body is connected on the cabinet, the control unit starts the test power supply through the preset program or manual instruction to carry out the automatic or remote test of the arc extinguishing chamber;Or the trigger switch, the test power supply is activated through the delay circuit, relates to the field of direct current lighting power distribution cabinet.The built-in test power supply of the application outputs adjustable direct current voltage and current, directly carries out real-time or periodic performance test on the key electrical elements (such as the arc extinguishing chamber of direct current relay) in the cabinet, can simulate the actual working condition, accurately verifies the element performance, discovers potential problems in time, and effectively reduces the circuit fault risk.

Description

Technical Field

[0001] This invention relates to the field of DC lighting distribution cabinets, specifically to a DC lighting distribution cabinet. Background Technology

[0002] DC lighting distribution cabinets are primarily used for power distribution management in DC lighting systems, enabling circuit on / off control and electrical component protection. However, in practical applications, existing DC lighting distribution cabinets have significant shortcomings, namely, the lack of dedicated testing procedures to verify the performance of critical electrical components. In enclosed environments, distribution cabinets must ensure stable operation of electrical components under high humidity or high temperature conditions, but existing designs typically rely solely on daily operating data or external testing equipment, failing to allow for real-time or periodic testing of the performance of core electrical components directly within the cabinet. This lack of testing procedures prevents the timely detection of potential problems with electrical components (such as the arc-extinguishing performance of relays), potentially leading to circuit failures or safety hazards. Furthermore, the lack of built-in testing procedures necessitates reliance on external equipment during installation, commissioning, or maintenance, increasing operational complexity and maintenance costs, and reducing the overall reliability and intelligence level of the system.

[0003] Therefore, there is an urgent need for an improved DC lighting distribution cabinet that integrates built-in testing procedures to enable performance verification of key electrical components and improve system reliability and maintenance efficiency. Summary of the Invention

[0004] According to an embodiment of the present invention, a DC lighting distribution cabinet is provided to solve the technical problems existing in the background art described above.

[0005] In a first aspect of the invention, a DC lighting distribution cabinet is provided.

[0006] The DC lighting distribution cabinet includes a cabinet body, a door, a DC relay, an inner door, a control unit, a trigger switch, and a test power supply. The door is connected to the cabinet, the inner door is located inside the cabinet and is used to protect the DC relay, the test power supply is located inside the cabinet and is electrically connected to the arc-extinguishing chamber of the DC relay, and is configured to provide DC voltage and current to test the arc-extinguishing performance of the arc-extinguishing chamber; The test power supply is configured to be activated via one of the following: The control unit starts the test power supply through a preset program or manual command to perform automatic or remote testing of the arc-extinguishing chamber; Alternatively, the trigger switch may activate the test power supply via a delay circuit.

[0007] Preferably, it also includes a partition, which is connected to the inner wall of the cabinet, and a dehumidification mechanism disposed in the cabinet; The dehumidification mechanism includes an outer cylinder, a moisture-absorbing component, a tube body, and multiple inner holes; The interior of the outer cylinder is connected to the tube body, and multiple inner holes are machined on the tube body. The moisture-absorbing component is disposed between the tube body and the outer cylinder.

[0008] Preferably, the dehumidification mechanism further includes a slide rail, a slider, a first trigger plate, a spring, a seat, a pressure rod, and a pressure plate; The slide rail is connected to the partition plate, the slider is slidably connected to the slide rail, the side of the slider near the outer cylinder is in contact with the first trigger plate, the first trigger plate is connected to the pressure plate and the pressure rod, the pressure rod is slidably connected to the seat body, the spring is sleeved on the pressure rod, and the two ends of the spring are respectively connected to the seat body and the first trigger plate; The pressure plate and the pressure rod can respectively enter the inner wall of the outer cylinder and the inner wall of the tube. The pressure plate can squeeze the moisture-absorbing component and drain the water absorbed by the moisture-absorbing component.

[0009] Preferably, it also includes a linkage mechanism, which includes a wheel, a connecting rod, a first rack, a gear, a second rack, a bracket, and a push plate; When the door is locked onto the cabinet, the wheel is in contact with the door, the wheel is rotatably connected to the connecting rod, the connecting rod is slidably connected to the partition and connected to the first rack, the first rack is slidably connected to the partition, the first rack meshes with the gear, the gear is rotatably connected to the bracket, the gear meshes with the second rack, the second rack is connected to the push plate, and the side of the push plate near the outer cylinder is in contact with the slider.

[0010] Preferably, it also includes an electric push rod and a second trigger plate, the output end of the electric push rod being connected to the second trigger plate, and the side of the second trigger plate near the outer cylinder being in contact with the slider; The second trigger plate and the push plate do not interfere with each other, and both can drive the slider to move towards the outer cylinder.

[0011] Preferably, it also includes a drainage component, which includes a first one-way valve, a guide tube, and at least two second one-way valves; The first check valve is connected to the side of the outer cylinder away from the door body, at least two second check valves are connected to the side of the outer cylinder away from the door body, and two second check valves are connected to the guide pipe; The water squeezed out by the moisture-absorbing component enters the guide pipe through the second one-way valve.

[0012] Preferably, it also includes a monitoring mechanism, which includes a water storage box, a connecting pipe, a float, a connecting rod, and a drainage assembly; The inner wall of the water storage box is slidably connected to the float, the float is slidably connected to the connecting pipe, the float is connected to the connecting rod, the connecting rod is slidably connected to the water storage box, and the drainage assembly is located below the water storage box; The drainage assembly includes a flow-limiting structure configured to discharge water from the water storage box to the outside of the cabinet in a manner that limits the flow rate.

[0013] Preferably, the monitoring mechanism further includes a stop, a first protrusion, a second protrusion, a limiting sleeve, a sliding plate, an infrared sensor, a soft lever, a crossbeam, a connecting plate, an opening, and a connecting rod; The stop block is connected to the connecting rod. When the liquid level in the water storage box reaches a certain height, the stop block can prevent the first protrusion and the slide plate from moving towards the water storage box. The second protrusion is connected to the bottom of the partition. The slide plate is slidably connected to the limiting sleeve and the inner door respectively. The limiting sleeve is connected to the partition. The first and second protrusions limit the maximum movement distance of the slide plate along the length direction of the limiting sleeve. The opening is machined on the slide plate. The top of the slide plate is attached to the monitoring end of the infrared sensor. The crossbeam is connected to the opening. The slider is connected to the connecting rod. The connecting rod is slidably connected to the partition. The connecting rod is connected to the connecting plate. The connecting plate is connected to the soft lever. The soft lever is set on the crossbeam along the width direction of the slide plate to divide the opening into two areas. The soft lever is located in the area away from the door body. When the first protrusion is in contact with the door body in the closed state, the opening is misaligned with the monitoring end of the infrared sensor; When the slide plate is in contact with the second protrusion, the opening corresponds to the monitoring end of the infrared sensor. If the stop block moves to the position corresponding to the first protrusion at this time, the slider will not drive the slide plate to move away from the second protrusion during the reset process.

[0014] Preferably, it also includes an exhaust fan mounted on the partition.

[0015] Preferably, it also includes heat dissipation fins installed above the cabinet, and the air outlet of the exhaust fan corresponds to the heat dissipation fins.

[0016] One or more technical solutions provided in this application have at least the following technical effects or advantages: 1. The present invention provides a DC lighting distribution cabinet. The present invention uses a built-in test power supply to output adjustable DC voltage and current, and directly performs real-time or periodic performance tests on key electrical components (such as the arc-extinguishing chamber of a DC relay) inside the cabinet. It can simulate actual working conditions, accurately verify component performance, promptly detect potential problems, and effectively reduce the risk of circuit failure.

[0017] It should be understood that the description in the Summary of the Invention is not intended to limit the key or essential features of the embodiments of the present invention, nor is it intended to restrict the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0018] The above and other features, advantages, and aspects of the various embodiments of the present invention will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein: Figure 1 A three-dimensional connection structure diagram of a DC lighting distribution cabinet according to an embodiment of the present invention is shown; Figure 2 An exploded view of a DC lighting distribution cabinet according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of the connection structure between the inner door and the exhaust fan of a DC lighting distribution cabinet according to an embodiment of the present invention is shown; Figure 4 A schematic diagram of the connection structure between the electric push rod and the partition of a DC lighting distribution cabinet according to an embodiment of the present invention is shown. Figure 5 A schematic diagram of the connection structure of the current-guiding assembly of a DC lighting distribution cabinet according to an embodiment of the present invention is shown; Figure 6 An exploded view of the linkage mechanism and current-guiding assembly of a DC lighting distribution cabinet according to an embodiment of the present invention is shown; Figure 7 A schematic diagram of the connection structure of the dehumidification mechanism of a DC lighting distribution cabinet according to an embodiment of the present invention is shown; Figure 8 A partially enlarged view of the dehumidification mechanism of a DC lighting distribution cabinet according to an embodiment of the present invention is shown; Figure 9 A schematic diagram of the connection structure of the linkage mechanism of a DC lighting distribution cabinet according to an embodiment of the present invention is shown; Figure 10 A schematic diagram of the connection structure of the monitoring mechanism of a DC lighting distribution cabinet according to an embodiment of the present invention is shown; Figure 11 A schematic diagram of the connection structure of the first protrusion, crossbeam, and opening of a DC lighting distribution cabinet according to an embodiment of the present invention is shown.

[0019] The attached figures are labeled as follows: 1-Cabinet body, 10-Heat dissipation fins, 11-Door body, 12-Exhaust fan, 13-Inner door, 14-DC relay, 15-Test power supply, 2-Baffle, 3-Dehumidification mechanism, 301-Slide rail, 302-Slider, 303-Pressure plate, 304-Pressure rod, 305-First trigger plate, 306-Spring, 307-Outer cylinder, 308-Moisture absorption component, 309-Pipe body, 310-Inner hole, 311-Base body, 4-Monitoring mechanism, 401-Water storage box, 402-Drainage component, 403-Float, 404-Connecting pipe, 405-Block, 406-Connecting rod, 407 - Second protrusion, 408- Slide plate, 409- Limiting sleeve, 410- Infrared sensor, 411-, 412- Connecting plate, 413- Soft lever, 414- Connecting rod, 415- First protrusion, 416- Crossbeam, 417- Opening, 5- Linkage mechanism, 501- Wheel, 502- Connecting rod, 503- First rack, 504- Gear, 505- Second rack, 506- Bracket, 507- Push plate, 6- Drainage assembly, 601- First one-way valve, 602- Drainage pipe, 603- Second one-way valve, 7- Electric push rod, 8- Second trigger plate, 9- Trigger switch. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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.

[0021] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0022] like Figures 1 to 11As shown, the DC lighting distribution cabinet of the present invention mainly includes a cabinet body 1, a door 11, an inner door 13, a DC relay 14, a control unit, a trigger switch 9, and a test power supply 15. The cabinet body 1 is the main structure of the DC lighting distribution cabinet, made of metal, possessing good mechanical strength and protective performance, and is used to house and protect the internal electrical components. The cabinet body 1 has mounting plates and partitions inside for fixing and separating the various components. The door 11 is pivotally connected to the front of the cabinet body 1 via hinges or similar connecting mechanisms, used to close the opening of the cabinet body 1. A transparent observation window can be provided on the door 11 to facilitate the user's view of the cabinet's internal status, and a latch is also provided for security. The inner door 13 is located inside the cabinet body 1, in front of the DC relay 14, and is made of insulating material, used to isolate and protect the DC relay 14, preventing accidental contact or interference from external factors. The inner door 13 is fixed to the internal frame of the cabinet body 1 by bolts or clips. The DC relay 14 is the core electrical component of the distribution cabinet, mounted on the mounting plate inside the cabinet body 1, and is used to control the on / off state of the DC lighting circuit. The DC relay 14 includes an arc-extinguishing chamber to suppress arc generation when the circuit is disconnected, thereby protecting the circuit and extending the relay's lifespan. The test power supply 15 is located inside the cabinet 1 and is electrically connected to the arc-extinguishing chamber of the DC relay 14 via wires. The test power supply 15 is configured to output adjustable DC voltage and current to simulate actual working conditions and test the arc-extinguishing performance of the arc-extinguishing chamber. The test power supply 15 includes a voltage regulator circuit and a current regulation module to ensure the stability of the output parameters. The control unit is the intelligent control core of the distribution cabinet and is integrated into the control box inside the cabinet 1. The control unit includes a microprocessor, memory, and communication module, capable of executing preset programs or receiving remote commands to control the start and stop of the test power supply 15 and other power distribution functions. The control unit is connected to the test power supply 15 and the DC relay 14 via wires. A trigger switch 9 is installed on the exterior or interior door 13 of the cabinet 1 and is configured to manually trigger the start of the test power supply 15. The trigger switch 9 is connected to the test power supply 15 via a delay circuit to achieve a delayed activation function, avoiding accidental operation or instantaneous triggering. Cabinet 1 serves as the overall supporting structure, with DC relay 14, test power supply 15, and control unit internally fixed by mounting plates and partitions. Door 11 is connected to cabinet 1 via hinges, and inner door 13 is connected to the internal frame of cabinet 1 via fasteners, forming a double-layer protective structure. The arc-extinguishing chamber of DC relay 14 is electrically connected to the output terminal of test power supply 15 via wires, and the input terminal of test power supply 15 is connected to the main power supply inside cabinet 1 or an external power supply. Control unit is connected to test power supply 15 and DC relay 14 via signal lines to send control signals and receive status feedback. The communication module of control unit supports wired or wireless communication for remote operation. Trigger switch 9 is connected to the control terminal of test power supply 15 via a delay circuit. The delay circuit uses a timer chip such as a 555 timer, with a delay time set from 0.5 seconds to 2 seconds to ensure the stability of the trigger signal.

[0023] In normal operation, the DC lighting distribution cabinet of this invention controls the on / off state of the lighting circuit through DC relays 14. The control unit manages the switching state of the relays according to a preset program or external commands (such as remote control signals) to ensure the stable operation of the power distribution system.

[0024] To test the arc-extinguishing performance of the DC relay 14, this invention provides two activation methods for the test power supply 15: Activation via Control Unit: The control unit sends a start signal to the test power supply 15 according to a preset program (such as a timed test plan). The test power supply 15 outputs a specific DC voltage and current (such as 100V, 10A), which is applied to the arc-extinguishing chamber of the DC relay 14 to simulate the arc generation conditions when the circuit is broken. The control unit records test data (such as arc duration and voltage waveform) and transmits the results to a remote terminal or displays them on the screen of cabinet 1 via the communication module. The user sends test commands to the control unit via a remote terminal (such as a computer or mobile phone). After verifying the command, the control unit starts the test power supply 15 to execute the test, and the test process is the same as that of automatic testing.

[0025] Activation via trigger switch 9: The user manually presses trigger switch 9, and the trigger signal is processed by a delay circuit to activate test power supply 15. The delay circuit ensures a stable trigger signal and avoids misoperation. Test power supply 15 outputs a preset DC voltage and current, which are applied to the arc-extinguishing chamber to test its arc-extinguishing performance. The test results can be recorded and displayed by the control unit.

[0026] In practical applications, the DC lighting distribution cabinet of this invention is suitable for the following scenarios: Maintenance personnel manually start the test power supply 15 via trigger switch 9 to periodically check the arc-extinguishing performance of the DC relay 14, ensuring the reliability of the power distribution system. In large lighting systems, managers send instructions to the control unit via a remote terminal to execute automatic or remote tests, obtain performance data of the arc-extinguishing chamber, and promptly identify potential faults. During the installation or commissioning phase of the distribution cabinet, technicians use the automatic testing function of the control unit to verify whether the performance of the DC relay 14 meets the design requirements.

[0027] The DC lighting distribution cabinet of this invention has the following technical advantages: The built-in test power supply 15 can directly test the performance of the arc-extinguishing chamber without the need for external testing equipment, thus improving testing efficiency. It supports automatic, remote, and manual testing to meet the needs of different application scenarios. The inner door 13 and delay circuit design effectively prevent misoperation, protecting the safety of operators and equipment. The control unit supports remote communication and data recording, facilitating system monitoring and maintenance.

[0028] In this embodiment, the DC lighting distribution cabinet of the present invention further includes a partition 2 and a dehumidification mechanism 3, used to separate the internal space of the cabinet and maintain a dry environment to protect the reliability and safety of electrical components. The partition 2 is a rectangular plate structure made of metal or insulating material, with good mechanical strength and corrosion resistance. The size of the partition 2 is adapted to the internal space of the cabinet 1, used to separate the electrical component area and the dehumidification area inside the cabinet 1. The dehumidification mechanism 3 is located at the bottom or side of the cabinet 1, used to absorb moisture inside the cabinet, preventing the electrical components from corroding or short-circuiting due to the humid environment. The dehumidification mechanism 3 includes an outer cylinder 307, a moisture-absorbing component 308, a tube 309, and multiple inner holes 310, with the following specific structure: The outer cylinder 307 is a cylindrical or rectangular sealed container made of corrosion-resistant material, with a volume of 1L to 5L. The outer cylinder 307 is fixed to the inner wall of the cabinet 1 by bolts or clips, and its interior is connected to the tube 309 through a connector, used to accommodate the moisture-absorbing component 308 and guide the flow of moisture. The tube body 309 is a hollow tubular structure made of corrosion-resistant metal or plastic, and its length is adapted to the internal space of the outer cylinder 307. Multiple internal holes 310 are machined on the side wall of the tube body 309. These internal holes 310 are circular through holes, evenly distributed to increase the airflow area. The number of internal holes 310, ranging from 10 to 50, arranged in a matrix or spiral pattern, are used to introduce humid air from the cabinet 1 into the tube body 309, allowing it to contact the moisture-absorbing component 308. The moisture-absorbing component 308 is located in the space between the tube body 309 and the outer cylinder 307. The partition 2 is fixedly connected to the inner wall of the cabinet 1 by welding or bolts, dividing the internal space of the cabinet 1 into an electrical component area and a dehumidification area, preventing moisture from diffusing to the electrical components (such as DC relays or test power supplies). The outer cylinder 307 of the dehumidification mechanism 3 is fixed to the inner wall of the cabinet 1 or the lower side of the partition 2 by bolts or clips, ensuring a secure installation. The tube body 309 is connected to the interior of the outer cylinder 307 via a flange or threaded connection, and the moisture-absorbing component 308 fills the space between the outer cylinder 307 and the tube body 309. Multiple inner holes 310 are evenly distributed on the sidewall of the tube body 309, ensuring that humid air effectively enters the tube body 309 and is absorbed by the moisture-absorbing component 308. The dehumidification mechanism 3 achieves dehumidification inside the cabinet 1 in the following way: humid air inside the cabinet 1 enters the multiple inner holes 310 on the tube body 309 through natural convection or temperature difference. The even distribution and appropriate diameter design of the inner holes 310 increase the airflow area and improve the efficiency of moisture entry. After entering the tube body 309, the humid air is guided by the outer cylinder 307 and comes into full contact with the moisture-absorbing component 308. The moisture-absorbing material in the moisture-absorbing component 308 absorbs moisture from the air, converting the moisture into a solid or liquid state for storage, thereby reducing the relative humidity inside the cabinet 1 and maintaining a dry environment. The partition 2 physically isolates the dehumidification mechanism 3 from the electrical component area, preventing moisture from spreading to the electrical area during the replacement or maintenance of the moisture absorption component 308, and ensuring the safe operation of the electrical components.

[0029] In practical applications, in humid environments such as coastal areas and underground facilities, the dehumidification mechanism 3 effectively absorbs moisture from the cabinet 1, protecting electrical components from corrosion or short-circuit risks. The dehumidification mechanism 3, through its inner hole 310 and moisture-absorbing component 308, significantly improves moisture absorption efficiency and extends the service life of electrical components. The partition 2 physically separates the electrical and dehumidification areas, enhancing system safety and ease of maintenance. The moisture-absorbing component 308 uses replaceable or renewable materials, and the sealed design of the outer cylinder 307 simplifies the maintenance process.

[0030] The moisture-absorbing component 308 is designed with composite materials, combining highly absorbent materials and an elastic support structure to achieve efficient moisture absorption and compression-release functions. The main components and their formulation are as follows: Silica gel: comprising 60%-70% of the total mass. Type A fine-pore silica gel (pore size 2-3nm) is selected, possessing a high specific surface area (600-800 m² / g) and excellent moisture absorption properties, capable of absorbing 30%-40% of its own weight in moisture at 90% relative humidity. The silica gel particle size is 1-3mm, ensuring air circulation and efficient moisture absorption.

[0031] Sodium polyacrylate: accounts for 20%-25% of the total mass. Sodium polyacrylate is a superabsorbent polymer that can absorb 100-1000 times its own weight in water, forming a gel-like structure that enhances the water absorption capacity of the moisture-absorbing component 308 in high-humidity environments. Its particle size is 0.5-1mm, and it is mixed with silica gel to improve the overall moisture absorption capacity.

[0032] Polyurethane foam: accounting for 10%-15% of the total mass. Open-cell polyurethane foam (density 20-30 kg / m³) is selected as the elastic support matrix, providing compression and resilience properties. The porosity of the polyurethane foam is greater than 90%, which facilitates the containment of silica gel and sodium polyacrylate particles, while also promoting moisture extrusion during compression.

[0033] Binder: 0.5%-1% of total mass. Polyvinyl alcohol (PVA) is used as a water-soluble binder to bond silicone, sodium polyacrylate, and polyurethane foam together, ensuring the structural stability of the moisture-absorbing component 308. PVA has low solubility in water and does not affect its moisture-absorbing performance.

[0034] The preparation process of the moisture-absorbing component 308 is as follows: Raw material pretreatment: Dry the type A silica gel granules at 120°C for 2 hours to remove residual moisture and ensure initial moisture absorption capacity.

[0035] Sodium polyacrylate particles are screened to control the particle size to 0.5-1mm to avoid agglomeration.

[0036] Polyurethane foam is cut into blocks with a thickness of 10-20mm, cleaned and dried to remove impurities.

[0037] Mixing and bonding: Mix the components according to the following ratio (65% silica gel, 22% sodium polyacrylate, 12% polyurethane foam, 1% PVA). First, uniformly disperse the silica gel and sodium polyacrylate particles within the pores of the polyurethane foam.

[0038] Dissolve PVA in an appropriate amount of deionized water (mass ratio PVA:water = 1:10) to make an adhesive solution, spray it onto the surface of the mixture, and stir evenly.

[0039] Molding and curing: The mixture is loaded into a mold (the space that fits the outer cylinder 307 and the tube 309, with a diameter of 100-150 mm and a thickness of 20-50 mm), and light pressure (0.1-0.2 MPa) is applied to form the shape.

[0040] The PVA is cured by drying at 60°C for 4 hours to form a moisture-absorbing component 308 with elasticity and a porous structure.

[0041] Packaging: The molded moisture-absorbing component 308 is placed into a breathable non-woven bag (made of polypropylene with a pore size of 0.1-0.5mm), sealed, and placed in the space between the outer cylinder 307 and the tube body 309 to ensure that moisture can enter through the inner hole 310 and be absorbed.

[0042] In this embodiment, the supplementary component of the dehumidification mechanism 3 is designed as a mechanical extrusion system, which cooperates with the outer cylinder 307, the tube body 309, and the moisture-absorbing component 308 to realize the compression and water release function of the moisture-absorbing component 308. The specific structure of each component is as follows: The slide rail 301 is a linear guide rail. The slide rail 301 has a T-shaped or U-shaped groove structure to ensure sliding stability. The slider 302 is a rectangular block structure that matches the slide rail 301, and is made of wear-resistant plastic (such as polytetrafluoroethylene) or metal. The slider 302 has balls or sliding plates inside, forming a low-friction sliding fit with the slide rail 301. The first trigger plate 305 is a rectangular plate structure, made of stainless steel or engineering plastic. The first trigger plate 305 is used to transmit external force and drive the pressure plate 303 and the pressure rod 304 to move. The spring 306 is a compression spring. The spring 306 provides a restoring force to ensure that the extrusion mechanism returns to its original position when not in operation. The base 311 is a fixed support, made of stainless steel or cast iron, with a circular sliding hole machined inside to guide the sliding movement of the pressure rod 304. The pressure rod 304 is a cylindrical rod made of stainless steel. The surface of the pressure rod 304 is smooth and corrosion-resistant, ensuring smooth sliding over a long period. The pressure plate 303 is a rectangular or circular plate structure, made of stainless steel or hard plastic, and its size is adapted to the inner wall of the outer cylinder 307. The surface of the pressure plate 303 has micropores to facilitate the drainage of moisture during extrusion. The slide rail 301 is fixed to the side or top of the partition plate 2 by bolts or welding, parallel to the axis of the outer cylinder 307, ensuring that the extrusion mechanism is aligned with the moisture absorption component 308. The slider 302 is slidably connected to the slide rail 301, and the side of the slider 302 closest to the outer cylinder 307 is fixed to the back of the first trigger plate 305 by bolts or adhesive. The first trigger plate 305 is connected to one end of the pressure plate 303 and the pressure rod 304 by welding or bolts, forming an integrated extrusion drive structure. The other end of the pressure rod 304 is inserted into the sliding hole of the seat 311, forming a sliding fit with the seat 311. The seat 311 is fixed to the partition plate 2 or the outer wall of the outer cylinder 307 by bolts to ensure stability. The spring 306 is sleeved on the outer surface of the pressure rod 304. One end of the spring 306 abuts against the end face of the seat 311, and the other end abuts against the back of the first trigger plate 305, providing a reset spring force. The working ends of the pressure plate 303 and the pressure rod 304 are aligned with the inner walls of the outer cylinder 307 and the tube 309, respectively. The pressure plate 303 can enter the inner wall of the outer cylinder 307 under the drive of the first trigger plate 305, squeezing the moisture-absorbing component 308; the pressure rod 304 can enter the inner wall of the tube 309 under the drive of the first trigger plate 305, assisting the pressure plate 303 in applying uniform pressure. The moisture-absorbing component 308 fills the space between the outer cylinder 307 and the tube 309 and is directly squeezed by the pressure plate 303. In the non-compressed state, the spring 306 is in a free or slightly compressed state, the pressure plate 303 and the pressure rod 304 are located outside the outer cylinder 307 and the tube 309, and the moisture absorption component 308 absorbs the humid air inside the cabinet 1 through the inner hole 310.When the moisture-absorbing component 308 reaches moisture saturation (absorbing approximately 50%-60% of its own weight in water), maintenance personnel manually push the slider 302 along the slide rail 301. The slider 302 drives the first trigger plate 305 forward, compressing the spring 306. The first trigger plate 305 drives the pressure plate 303 and the pressure rod 304 to enter the inner walls of the outer cylinder 307 and the tube body 309, respectively. The pressure plate 303 squeezes the moisture-absorbing component 308, squeezing out the moisture, which is discharged through the micropores of the pressure plate 303 and the drain hole of the outer cylinder 307. The pressure rod 304 enters the tube body 309, assisting the pressure plate 303 in applying uniform pressure and preventing local deformation of the moisture-absorbing component 308. After compression, the pushing force of slider 302 is released, and the elastic force of spring 306 pushes the first trigger plate 305, pressure plate 303, and pressure rod 304 to reset. Slider 302 slides back to its initial position along slide rail 301, and moisture absorption component 308 returns to a relaxed state, ready for the next moisture absorption cycle. In the default state of spring 306, the gap between pressure plate 303 and outer cylinder 307 ensures that moisture absorption component 308 can attract moisture from inside cabinet 1.

[0043] In practical use, under high humidity conditions, the moisture-absorbing component 308 reaches saturation. Maintenance personnel open the cabinet door 11 and manually drive the slider 302 to squeeze the moisture-absorbing component 308, releasing moisture and extending its service life. The coordinated squeezing design of the pressure plate 303 and pressure rod 304 ensures sufficient release of moisture from the moisture-absorbing component 308; a single squeeze can remove the absorbed moisture. The low-friction design of the slide rail 301 and slider 302, combined with the reset function of the spring 306, makes the squeezing operation convenient and reliable. A gap exists between the pressure plate 303 and pressure rod 304, the same thickness as the wall of the tube 309, through which the guide tube 602 and one of the second one-way valves 603 correspond to the tube 309.

[0044] In this embodiment, a linkage mechanism 5, an electric push rod 7, and a second trigger plate 8 are also included to drive the slider 302 of the dehumidification mechanism 3, thereby realizing the compression and water release function of the moisture absorption component 308. The linkage mechanism 5 provides mechanical driving force through the locking action of the door 11, and the electric push rod 7 and the second trigger plate 8 provide optional electric driving methods. Both act on the slider 302 without interfering with each other.

[0045] The linkage mechanism 5 includes a wheel 501, a connecting rod 502, a first rack 503, a gear 504, a second rack 505, a bracket 506, and a push plate 507. The specific structures of each component are as follows: The wheel 501 is a disc-shaped structure made of stainless steel or hard plastic with a smooth surface, used to contact the door body 11 and transmit the force for locking. The connecting rod 502 is a rod-shaped structure made of stainless steel or aluminum alloy, possessing high strength and corrosion resistance, used to connect the wheel 501 and the first rack 503 to transmit mechanical motion. The first rack 503 is a long, toothed structure made of steel or hard plastic with straight teeth, and its surface is hardened to enhance wear resistance. The gear 504 is a circular gear made of steel or engineering plastic, with teeth that match the first rack 503 and the second rack 505, used to transmit and change the direction of motion. The second rack 505 is a long, toothed structure made of the same material as the first rack 503, with a tooth profile matching the gear 504, used to drive the push plate 507. The bracket 506 is a fixed support structure made of stainless steel or cast iron, used to support the gear 504 and ensure its stable rotation. The push plate 507 is a plate-like structure made of stainless steel or hard plastic with a smooth surface, used to push the slider 302. The electric push rod 7 is a linear drive device, including a motor, a reduction mechanism, and a push rod, powered by low-voltage DC, with a stainless steel or aluminum alloy housing, possessing waterproof and corrosion-resistant properties. The second trigger plate 8 is a plate-like structure made of stainless steel or engineering plastic with a smooth surface, used to transmit the driving force of the electric push rod 7 to the slider 302. The wheel 501 is rotatably connected to one end of the connecting rod 502 via a rotating shaft; the outer edge of the wheel 501 is in contact with the inner side of the door 11 when the door 11 is locked to the cabinet 1. The other end of the connecting rod 502 is slidably connected to the partition 2 via a groove or guide rail, and fixedly connected to the first rack 503 via bolts or pins. The first rack 503 is slidably connected to the partition 2 via a guide rail or groove, and its toothed portion meshes with the gear 504. The gear 504 is rotatably connected to the bracket 506 via a rotating shaft, and the bracket 506 is fixed to the surface of the partition 2 via bolts. The other side of the gear 504 meshes with the toothed portion of the second rack 505, and the second rack 505 is fixedly connected to the push plate 507 via bolts or welding. The side of the push plate 507 near the outer cylinder 307 is in contact with the side of the slider 302, configured to push the slider 302 to slide along the slide rail 301. The electric push rod 7 is fixed to the inner wall of the partition 2 or the cabinet 1 via bolts, and its output end (push rod) is connected to the second trigger plate 8 via pins or bolts. The side of the second trigger plate 8 closest to the outer cylinder 307 is in contact with the side of the slider 302, and is configured to push the slider 302 to slide along the slide rail 301. The movement paths of the push plate 507 and the second trigger plate 8 are parallel, and they are located on different sides or areas of the slider 302, respectively, to ensure that the two do not interfere with each other when driving the slider 302.

[0046] In actual use, when the door 11 is closed: when the door 11 is locked to the cabinet 1, the inner side of the door 11 presses against the roller 501, causing it to rotate around the pivot. The rotation of the roller 501 drives the connecting rod 502 to slide along the slide groove of the partition 2 away from the outer cylinder 307 via the pivot. The sliding of the connecting rod 502 pulls the first rack 503 to move along the guide rail of the partition 2, and the teeth of the first rack 503 drive the gear 504 to rotate. The rotation of the gear 504 drives the second rack 505 to move in the opposite direction, and the second rack 505 pulls the push plate 507 to move away from the outer cylinder 307. The push plate 507 is in contact with the slider 302, causing the slider 302 to slide along the slide rail 301 away from the outer cylinder 307. At this time, the slider 302 pulls the pressure plate 303 and the pressure rod 304 away from the inner wall of the outer cylinder 307 and the tube 309 via the first trigger plate 305, and the spring 306 is compressed and in a deformed state. A gap is formed between the pressure plate 303 and the outer cylinder 307 to ensure that the moisture absorption component 308 can freely absorb the humid air in the cabinet 1 through the inner hole 310.

[0047] When the door 11 is opened: When the door 11 is unlocked and opened, the wheel 501 loses the pressure of the door 11, and the restoring force of the spring 306 (the retraction force in the compressed state) pushes the slider 302 along the slide rail 301 towards the outer cylinder 307 via the first trigger plate 305. The slider 302 drives the push plate 507, the second rack 505, the gear 504, the first rack 503, and the connecting rod 502 to move in sequence. The connecting rod 502 slides towards the door 11, and the wheel 501 returns to its initial position. The movement of the slider 302 drives the pressure plate 303 and the pressure rod 304 to enter the inner walls of the outer cylinder 307 and the tube 309 respectively via the first trigger plate 305. The pressure plate 303 squeezes the moisture-absorbing component 308, and the moisture in the moisture-absorbing component 308 is squeezed out. The electric push rod 7 receives a signal from the control unit and is triggered by a preset program. Its output end extends, pushing the second trigger plate 8 towards the outer cylinder 307. The second trigger plate 8 contacts the slider 302, pushing the slider 302 to slide along the slide rail 301 towards the outer cylinder 307. The slider 302 drives the pressure plate 303 and pressure rod 304 through the first trigger plate 305 to squeeze the moisture-absorbing component 308, releasing the absorbed moisture. The squeezing process is the same as the squeezing stage of the linkage mechanism 5. The spring 306 is compressed during the squeezing process, storing reset energy.

[0048] After compression, the output end of the electric push rod 7 retracts, and the second trigger plate 8 moves away from the outer cylinder 307, separating from the slider 302. The restoring force of the spring 306 (the expansion force in the compressed state) pushes the first trigger plate 305, the pressure plate 303, and the pressure rod 304 to reset. The slider 302 slides back to its initial position along the slide rail 301 (away from the outer cylinder 307), the gap between the pressure plate 303 and the outer cylinder 307 is restored, and the moisture absorption component 308 returns to a relaxed state, ready for the next moisture absorption cycle.

[0049] In this embodiment, a diversion component 6 is also included, which is used to collect and divert the moisture released by the moisture absorption component 308 in the dehumidification mechanism 3, so as to prevent the moisture from remaining in the outer cylinder 307 or flowing back into the cabinet 1, thereby protecting the reliability and safety of the electrical components.

[0050] The drainage assembly 6 includes the following components: a first one-way valve 601, made of stainless steel or corrosion-resistant plastic, with a built-in sealing ring and spring structure, configured to allow external air to enter the outer cylinder 307 to balance the internal pressure while preventing moisture or humidity from flowing out. A guide pipe 602 is a hollow tubular structure made of corrosion-resistant plastic (such as PVC) or stainless steel, with a smooth inner wall to reduce water flow resistance, configured to guide the moisture released by the moisture-absorbing assembly 308 to the outside of the cabinet 1 or an external water storage container. At least two second one-way valves 603, made of the same material as the first one-way valve 601, employing a one-way flow design, with built-in sealing rings and springs, configured to allow the moisture released by the moisture-absorbing assembly 308 to flow into the guide pipe 602 while preventing moisture from flowing back into the outer cylinder 307. The first check valve 601 is connected to the side of the outer cylinder 307 away from the door 11 via threads, snap-fit, or flange. The valve inlet is connected to the air inside the cabinet 1, and the outlet is connected to the inside of the outer cylinder 307, ensuring that air can enter the outer cylinder 307 during compression to avoid negative pressure. At least two second check valves 603 are connected to the side of the outer cylinder 307 away from the door 11 via threads, snap-fit, or flange. The valve inlet is connected to the inside of the outer cylinder 307, and the outlet is connected to the inlet of the guide pipe 602 via threads or flange. Multiple second check valves 603 are arranged in parallel to increase drainage efficiency and reduce the risk of blockage of a single valve. The inlet of the guide pipe 602 is connected to the second check valves 603, and the outlet is connected to the drain outlet on the outside of the cabinet 1 or an external water storage container (optional configuration) via threads or snap-fit, ensuring orderly drainage of water.

[0051] In actual use, when the moisture-absorbing component 308 is squeezed by the pressure plate 303 and the pressure rod 304, the released moisture accumulates inside the outer cylinder 307. Due to the increased internal pressure of the outer cylinder 307 caused by the squeezing process, the second one-way valve 603 opens, allowing moisture to flow through the valve inlet into the guide pipe 602 and then discharge along the guide pipe 602 to the outside of the cabinet 1 or an external water storage container. Simultaneously, the first one-way valve 601 opens under the pressure difference, allowing air from inside the cabinet 1 to enter the outer cylinder 307, balancing the internal pressure and preventing negative pressure from hindering moisture discharge. The one-way design of the first one-way valve 601 ensures that moisture or water will not flow back through the valve. The one-way design of the second one-way valve 603 prevents moisture in the guide pipe 602 from flowing back into the outer cylinder 307, protecting the moisture-absorbing component 308 and the dry environment inside the cabinet 1. After squeezing is complete, the second one-way valve 603 closes, and residual moisture in the guide pipe 602 continues to be discharged along the pipe, ensuring that there is no water accumulation inside the outer cylinder 307. The parallel design of multiple second check valves 603 improves drainage efficiency, reduces the risk of clogging, and ensures rapid water discharge. The first check valve 601 effectively balances the internal pressure of the outer cylinder 307, optimizing the squeezing and drainage process. The one-way flow mechanism of the first check valve 601 and the second check valve 603 prevents water backflow and protects the dry environment inside the cabinet 1.

[0052] In this embodiment, a monitoring mechanism 4 is also included to monitor the moisture status collected by the drainage component 6, prevent the water storage box 401 from being too full, and control the squeezing and resetting action of the moisture absorption component 308 through linkage with the slider 302. When the humidity in the cabinet 1 is too high, it can provide an early warning in time and facilitate staff to arrive at the scene in time for handling.

[0053] The monitoring mechanism 4 includes the following components: a water storage box 401, a sealed container made of transparent or semi-transparent corrosion-resistant plastic for easy observation of the internal liquid level, configured to store water diverted from the drainage assembly 6; a connecting pipe 404, a hollow tubular structure used to connect the water storage box 401 to the drainage assembly 6's drainage pipe 602; a float 403, a buoyancy element made of lightweight plastic or foam material with a waterproof surface, configured to move with the rise and fall of the liquid level in the water storage box 401; and a connecting rod 406, a slender rod used to transmit the movement of the float 403. The drainage assembly 402 includes a flow-limiting structure (such as a flow-limiting valve or capillary tube), configured to drain water from the water storage box 401 to the outside of the cabinet 1 at a controlled flow rate. The purpose of the drainage assembly 402 is to extend the monitoring period to determine whether the liquid level in the water storage box 401 exceeds the limit during a given test. When the liquid level does not exceed the limit, the drainage component 402 can also empty the water in the water storage box 401 to avoid affecting the accuracy of the next monitoring. The stop block 405 is a block structure configured to restrict the movement of the slide plate 408. The first protrusion 415 is a protrusion structure made of the same material as the slide plate 408 and is fixed to the slide plate 408 for interaction with the stop block 405 or the door 11. The second protrusion 407 is a protrusion structure fixed to the bottom of the partition 2 for limiting the range of movement of the slide plate 408. The limiting sleeve 409 is a tubular or groove-shaped structure for guiding the sliding of the slide plate 408. The slide plate 408 is a plate structure with an opening 417 for cooperation with the infrared sensor 410. The infrared sensor 410 can detect whether it is blocked by the slide plate 408. The soft toggle block 413 is a flexible element made of rubber or silicone and is configured to divide the area within the opening 417 and interact with the crossbeam 416. The crossbeam 416 is a slender structure spanning the opening 417, capable of engaging with the soft lever 413 and being actuated by the soft lever 413 when the slide plate 408 is not in a restrained position. The connecting plate 412 is a plate-like structure made of the same material as the slide plate 408, used to connect the soft lever 413 and the connecting rod 414. The opening 417 is a through hole machined on the slide plate 408, configured to cooperate with the monitoring end of the infrared sensor 410 to detect the position of the slide plate 408. The connecting rod 414 is a slender rod used to connect the slider 302 and the connecting plate 412, transmitting the movement of the slider 302. The water storage box 401 is fixed to the inner wall of the cabinet 1 or the bottom of the partition 2 by a snap fastener, and its top is connected to the connecting pipe 404 by a thread or flange. The other end of the connecting pipe 404 is connected to the guide pipe 602 of the drainage assembly 6. The float 403 is slidably connected to the inner wall of the water storage box 401, and its outer side is slidably engaged with the inner wall of the connecting pipe 404, ensuring that the float 403 rises and falls with the liquid level. The float 403 is fixedly connected to one end of the connecting rod 406 by adhesive. The other end of the connecting rod 406 is slidably connected to the top of the water storage box 401 through a sliding hole, and is fixedly connected to the stop block 405 by bolts or welding.The drainage assembly 402 is threaded or snap-fitted to the bottom of the water storage box 401. The flow-limiting structure connects to the drain outlet on the outside of the cabinet 1, ensuring that water is discharged at a controlled flow rate. A stop block 405 is fixed to the top of the connecting rod 406, configured to prevent the first protrusion 415 and the sliding plate 408 from moving towards the water storage box 401 when the liquid level in the water storage box 401 rises. The first protrusion 415 is welded or bolted to the side of the sliding plate 408, and the second protrusion 407 is fixed to the bottom of the partition 2. The first protrusion 415 and the second protrusion 407 together limit the sliding range of the sliding plate 408 along the limiting sleeve 409. The limiting sleeve 409 is fixed to the partition 2, and the sliding plate 408 is slidably connected to the limiting sleeve 409 and the inner door 13 via a sliding groove, ensuring stable sliding. An infrared sensor 410 is bolted or snap-fitted to the water storage box 401 or the partition 2, with its monitoring end abutting the top of the sliding plate 408, configured to detect the position of the opening 417. The crossbeam 416 is fixed to the inner wall of the opening 417 by welding or bolts. The connecting plate 412 is fixedly connected to the flexible lever 413 by adhesive. The flexible lever 413 is set on the crossbeam 416, dividing the opening 417 into two areas along the width direction of the slide plate 408. The flexible lever 413 is located in the area away from the door body 11. One end of the connecting rod 414 is fixedly connected to the slider 302 by bolts, and the other end is slidably connected to the partition plate 2 through the sliding groove and fixedly connected to the connecting plate 412. The connecting plate 412 is connected to the flexible lever 413.

[0054] In actual use, the control unit periodically sends a drive signal to the electric push rod 7 through a preset program to start the squeezing process of the moisture-absorbing component 308. The electric push rod 7 pushes the second trigger plate 8, driving the slider 302 to move along the slide rail 301 towards the outer cylinder 307, and then squeezing the moisture-absorbing component 308 through the pressure plate 303 and the pressure rod 304. The moisture released by the squeezing is guided into the water storage box 401 through the second one-way valve 603, the guide pipe 602 and the connecting pipe 404 of the diversion component 6. During the movement of the slider 302, the slider 302 drives the soft paddle 413 to move through the connecting rod 414 and the connecting plate 412. The soft paddle 413 is in contact with the crossbeam 416, indirectly driving the slide plate 408 to slide along the limiting sleeve 409 until the slide plate 408 is in contact with the second protrusion 407. At this time, the opening 417 is aligned with the monitoring end of the infrared sensor 410. The infrared sensor 410 detects a signal that is not blocked by the slide plate 408 and outputs a high-level signal to the control unit, indicating that the slide plate 408 is in the initial monitoring position. As the liquid level in the water storage box 401 rises, the float 403 floats up along the inner wall of the water storage box 401 and the inner wall of the connecting pipe 404 due to buoyancy, driving the connecting rod 406 and the stop 405 to move upward. When the liquid level in the water storage box 401 reaches a preset height (e.g., 80% of the capacity of the water storage box 401), the stop 405 rises to the position corresponding to the first protrusion 415, preventing the slide plate 408 from sliding towards the door 11. At this time, the soft lever 413 cannot continue to adhere to the crossbeam 416 due to the limitation of the slide plate 408, and relies on its own elastic deformation to pass over the crossbeam 416, no longer driving the slide plate 408 to move. The opening 417 remains aligned with the monitoring end of the infrared sensor 410, and the infrared sensor 410 continues to output a high-level signal.

[0055] The control unit determines whether the humidity inside cabinet 1 is too high using the following logic: Activation timing: After each squeezing action of the electric push rod 7 (usually lasting 5-10 seconds), the control unit activates the signal detection of the infrared sensor 410 to ensure that the slide plate 408 has reached the position of the second protrusion 407.

[0056] Signal Judgment: The control unit monitors the output signal of the infrared sensor 410 in real time. If the infrared sensor 410 continuously outputs a high-level signal (indicating that the opening 417 is aligned with the monitoring end) for more than a preset time threshold (e.g., 30 seconds), it indicates that the liquid level in the water storage box 401 is too high, and the amount of water released by the moisture absorption component 308 exceeds expectations, indirectly reflecting that the humidity inside the cabinet 1 exceeds the set value (e.g., relative humidity 80%).

[0057] Early warning mechanism: The control unit sends an excessive humidity warning signal to a remote terminal (such as a computer or mobile phone) through the communication module (supporting wired or wireless methods), prompting staff to check the humidity status of cabinet 1 and the status of the moisture absorption component 308.

[0058] When the door 11 is closed, the first protrusion 415 fits against the inside of the door 11, and the slide plate 408 is pushed away from the second protrusion 407. The opening 417 is misaligned with the monitoring end of the infrared sensor 410, and the infrared sensor 410 is blocked by the slide plate 408, outputting a low-level signal, indicating that the water level in the water tank 401 is normal or the slide plate 408 is not in the monitoring position. If the water level in the water tank 401 does not reach the preset height, the stop block 405 does not block the first protrusion 415. When the slider 302 resets, it can drive the slide plate 408 to move away from the second protrusion 407 through the connecting rod 414 and the soft lever 413, restoring the initial state. The monitoring mechanism 4 indirectly reflects the humidity level inside the cabinet 1 through the linkage between the water level in the water tank 401 and the infrared sensor 410. The control unit accurately judges that the humidity is too high based on the 30-second high-level signal threshold, providing timely warnings with a low false alarm rate. The mechanical linkage of float 403, connecting rod 406, and stop 405, combined with the electronic detection of infrared sensor 410, reduces the number of electronic components, lowers the failure rate, and adapts to long-term operation in high-humidity enclosed environments. The control unit achieves remote early warning via a communication module, facilitating rapid response by staff and preventing moisture damage to electrical components such as DC relay 14. The transparent material of water storage box 401 facilitates liquid level observation, and the flow-limiting structure of drainage component 402 supports controlled drainage. Combined with the limiting design of monitoring mechanism 4, it simplifies the maintenance process of moisture absorption component 308. Monitoring mechanism 4 works seamlessly with dehumidification mechanism 3, drainage component 6, and electric push rod 7. The linkage of slider 302 and sliding plate 408 optimizes squeezing and monitoring efficiency, improving the overall reliability of the distribution cabinet. Infrared sensor 410 only activates detection after electric push rod 7 squeezes; the control unit determines humidity through short-time signal analysis (30-second threshold), reducing energy consumption and extending sensor life.

[0059] It is worth noting that the liquid level in the water storage box 401 and the moisture absorption capacity of the moisture-absorbing component 308 are correlated through actual testing to indirectly reflect the humidity level inside the cabinet 1. For example, through multiple controlled environment tests (e.g., relative humidity of 60%, 80%, and 90%), the water absorption capacity of the moisture-absorbing component 308 at different humidity levels (e.g., 0.3-0.6 grams of water absorbed per gram of moisture-absorbing material) and the corresponding changes in the liquid level in the water storage box 401 are measured, thus constructing a humidity-liquid level correlation curve. The distance between the baffle 405 and the float 403 can be adjusted according to the temperature environment, thereby ensuring normal early warning when the humidity value exceeds the limit.

[0060] In this embodiment, an exhaust fan 12 is also included, mounted on the partition 2. Heat dissipation fins 10 are also included, mounted above the cabinet 1. The exhaust fan 12 is fixed to the partition 2 with clips and is located in the ventilation area inside the cabinet 1. The exhaust fan 12's outlet is aligned with the circulating air duct inside the cabinet 1. The air duct communicates with the outer cylinder 307 area of ​​the dehumidification mechanism 3 through guide holes on the partition 2, ensuring that hot air and moisture are concentrated towards the moisture absorption component 308. Both the air inlet and outlet of the exhaust fan 12 are equipped with sealing gaskets, tightly fitting against the partition 2 to prevent airflow leakage to the outside of the cabinet 1. The heat dissipation fins 10 are embedded in the top or side wall of the cabinet 1 by welding, exposed to ambient air externally and in close contact with the metal wall of the cabinet 1 internally, forming an efficient heat conduction path. The installation position of the heat dissipation fins 10 cooperates with the sealing structure of the cabinet 1 (e.g., rubber sealing strips or silicone gaskets) to ensure no air exchange channels. The inner surface of the heat dissipation fins 10 indirectly corresponds to the airflow path of the exhaust fan 12, conducting heat through the wall of the cabinet 1. The power cord of the exhaust fan 12 is connected to the control unit inside the cabinet 1, which controls its start and stop. The control unit can automatically adjust the operating status of the exhaust fan 12 according to the temperature or humidity inside the cabinet 1.

[0061] In actual use, under high load operation or in summer environment, electrical components generate a lot of heat. The exhaust fan 12 guides the heat to the heat dissipation fins 10 through internal circulating airflow. The heat dissipation fins 10 dissipate the heat to the outside of the cabinet 1 through thermal conduction, keeping the internal temperature of the cabinet 1 within a safe range and protecting the DC relay 14 and the test power supply 15.

[0062] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A DC lighting distribution cabinet, characterized in that, It includes a cabinet (1), a door (11), a DC relay (14), an inner door (13), a control unit, a trigger switch (9), and a test power supply (15). The door (11) is connected to the cabinet (1), the inner door (13) is located inside the cabinet (1) and is used to protect the DC relay (14), the test power supply (15) is located inside the cabinet (1) and is electrically connected to the arc-extinguishing chamber of the DC relay (14), and is configured to provide DC voltage and current to test the arc-extinguishing performance of the arc-extinguishing chamber; The test power supply (15) is configured to be activated by one of the following: The control unit starts the test power supply (15) through a preset program or manual command to perform automatic or remote testing of the arc extinguishing chamber. Or the trigger switch (9) activates the test power supply (15) through the delay circuit. The cabinet (1) is also provided with a partition (2) and a dehumidification mechanism (3). The partition (2) is connected to the inner wall of the cabinet (1). The dehumidification mechanism (3) includes an outer cylinder (307), a moisture absorption component (308), a slide rail (301), a slider (302), a first trigger plate (305), a spring (306), a seat (311), a pressure rod (304), and a pressure plate (303). The slide rail (301) is connected to the partition plate (2), the slider (302) is slidably connected to the slide rail (301), the side of the slider (302) near the outer cylinder (307) is in contact with the first trigger plate (305), the first trigger plate (305) is connected to the pressure plate (303) and the pressure rod (304), the pressure rod (304) is slidably connected to the seat (311), and the spring (306) is sleeved on the pressure rod (304). The two ends of the spring (306) are connected to the seat (311) and the first trigger plate (305) respectively. The seat (311) is a fixed support and is used to guide the sliding movement of the pressure rod (304). The other end of the pressure rod (304) is inserted into the sliding hole of the seat (311). The pressure plate (303) can enter the inner wall of the outer cylinder (307) under the drive of the first trigger plate (305) and squeeze the moisture-absorbing component (308). The DC lighting distribution cabinet also includes a linkage mechanism (5), which includes a wheel (501), a connecting rod (502), a first rack (503), a gear (504), a second rack (505), a bracket (506), and a push plate (507). When the door (11) is locked on the cabinet (1), the wheel (501) is in contact with the door (11), the wheel (501) is rotatably connected to the connecting rod (502), the connecting rod (502) is slidably connected to the partition (2) and connected to the first rack (503), the first rack (503) is slidably connected to the partition (2), the first rack (503) meshes with the gear (504), the gear (504) is rotatably connected to the bracket (506), the gear (504) meshes with the second rack (505), the second rack (505) is connected to the push plate (507), and the side of the push plate (507) near the outer cylinder (307) is in contact with the slider (302).

2. The DC lighting distribution cabinet according to claim 1, characterized in that, The dehumidification mechanism (3) also includes a tube (309) and multiple inner holes (310); The interior of the outer cylinder (307) is connected to the tube body (309), and a plurality of inner holes (310) are machined on the tube body (309). The moisture-absorbing component (308) is disposed between the tube body (309) and the outer cylinder (307).

3. The DC lighting distribution cabinet according to claim 2, characterized in that, The pressure plate (303) and the pressure rod (304) can respectively enter the inner wall of the outer cylinder (307) and the inner wall of the tube (309). The pressure plate (303) can squeeze the moisture absorption component (308) and drain the water absorbed by the moisture absorption component (308).

4. The DC lighting distribution cabinet according to claim 1, characterized in that, It also includes an electric push rod (7) and a second trigger plate (8), the output end of which is connected to the second trigger plate (8), and the side of the second trigger plate (8) near the outer cylinder (307) is in contact with the slider (302); The second trigger plate (8) and the push plate (507) do not interfere with each other, and both can drive the slider (302) to move toward the outer cylinder (307).

5. The DC lighting distribution cabinet according to claim 1, characterized in that, It also includes a drainage assembly (6), which includes a first check valve (601), a guide tube (602), and at least two second check valves (603). The first one-way valve (601) is connected to the side of the outer cylinder (307) away from the door body (11), and at least two second one-way valves (603) are connected to the side of the outer cylinder (307) away from the door body (11), and the two second one-way valves (603) are connected to the guide pipe (602). The water squeezed out by the moisture-absorbing component (308) enters the guide pipe (602) through the second one-way valve (603).

6. The DC lighting distribution cabinet according to claim 5, characterized in that, It also includes a monitoring mechanism (4), which includes a water storage box (401), a connecting pipe (404), a float (403), a connecting rod (406), and a drainage component (402). The inner wall of the water storage box (401) is slidably connected to the float (403), the float (403) is slidably connected to the connecting pipe (404), the float (403) is connected to the connecting rod (406), the connecting rod (406) is slidably connected to the water storage box (401), and the drainage assembly (402) is located below the water storage box (401). The drainage assembly (402) includes a flow-limiting structure configured to discharge water from the water storage box (401) to the outside of the cabinet (1) in a manner that limits the flow rate.

7. The DC lighting distribution cabinet according to claim 6, characterized in that, The monitoring mechanism (4) also includes a stop (405), a first protrusion (415), a second protrusion (407), a limiting sleeve (409), a sliding plate (408), an infrared sensor (410), a soft paddle (413), a crossbeam (416), a connecting plate (412), an opening (417), and a connecting rod (414). The stop block (405) is connected to the connecting rod (406). When the liquid level in the water storage box (401) reaches a certain height, the stop block (405) can prevent the first protrusion (415) and the sliding plate (408) from moving towards the water storage box (401). The second protrusion (407) is connected to the bottom of the partition (2). The sliding plate (408) is slidably connected to the limiting sleeve (409) and the inner door (13) respectively. The limiting sleeve (409) is connected to the partition (2). The first protrusion (415) and the second protrusion (407) limit the maximum movement distance of the sliding plate (408) along the length direction of the limiting sleeve (409). The opening (417) The processing is carried out on the slide plate (408), the top of the slide plate (408) is attached to the monitoring end of the infrared sensor (410), the crossbeam (416) is connected to the opening (417), the slider (302) is connected to the connecting rod (414), the connecting rod (414) is slidably connected to the partition (2), the connecting rod (414) is connected to the connecting plate (412), the connecting plate (412) is connected to the soft lever (413), the soft lever (413) is set on the crossbeam (416) along the width direction of the slide plate (408) to divide the opening (417) into two areas, and the soft lever (413) is located in the area away from the door body (11); When the first protrusion (415) is in contact with the door (11) in the closed state, the opening (417) is misaligned with the monitoring end of the infrared sensor (410); When the slide plate (408) is in contact with the second protrusion (407), the opening (417) corresponds to the monitoring end of the infrared sensor (410). If the stop block (405) moves to the position corresponding to the first protrusion (415) at this time, the slider (302) will not drive the slide plate (408) to move away from the second protrusion (407) during the reset process.

8. The DC lighting distribution cabinet according to claim 1, characterized in that, It also includes an exhaust fan (12) mounted on the partition (2).

9. The DC lighting distribution cabinet according to claim 8, characterized in that, It also includes heat dissipation fins (10) installed above the cabinet (1), and the air outlet of the exhaust fan (12) corresponds to the heat dissipation fins (10).

Images