Low-voltage intelligent switch cabinet with heat dissipation and moisture-proof functions

Abstract

The invention discloses a low-voltage intelligent switch cabinet with heat dissipation and moisture-proof functions, and belongs to the technical field of low-voltage intelligent switch cabinets, the low-voltage intelligent switch cabinet comprises a switch cabinet body, and a distributed temperature and humidity sensor array is arranged in an inner cavity of the switch cabinet body and is used for monitoring the temperature and humidity of a key heating part and an electrical sensitive area respectively; the dehumidification and moisture-proof storage box is mounted on the top surface of the switch cabinet body, and a dehumidification device capable of penetrating and extending into an inner cavity of the switch cabinet body is arranged in the dehumidification and moisture-proof storage box; and the two moisture-proof drying boxes are symmetrically arranged and are tightly attached to the outer walls of the two sides of the switch cabinet body respectively, hot air or cold air is stored in an inner cavity of each moisture-proof drying box, and the moisture-proof drying boxes conduct the temperature of the hot air or the cold air into the switch cabinet body through conduction parts for drying or heat dissipation. The dehumidification efficiency and the heat dissipation response speed are remarkably improved, condensation formation is effectively restrained, and meanwhile the risk that external moisture is introduced in the heat dissipation process is avoided.

Description

Technical Field

[0001] This invention belongs to the field of low-voltage intelligent switchgear technology, and in particular, a low-voltage intelligent switchgear with heat dissipation and moisture-proof functions. Background Technology

[0002] Low-voltage intelligent switchgear is a core piece of equipment in low-voltage power distribution systems, primarily used for power distribution, line protection, load control, and operational status monitoring. It is widely used in industrial plants, commercial buildings, data centers, and new energy power plants. With the development of smart grids and digital operation and maintenance, traditional switchgear has gradually upgraded to "intelligent" systems, integrating current, voltage, and temperature sensors and communication modules to achieve remote monitoring and fault early warning. However, switchgear has long faced two major challenges in actual operation: excessive internal temperature rise and condensation caused by environmental humidity intrusion. Especially in areas with high temperature and humidity, coastal salt spray, or large diurnal temperature variations, components inside the cabinet are prone to short circuits, creepage, or even fires due to overheating, aging, or decreased insulation performance, seriously threatening power supply safety and equipment lifespan.

[0003] While some low-voltage switchgear on the market has incorporated auxiliary devices such as cooling fans, silica gel desiccants, electric heating plates, or semiconductor dehumidifiers, significant drawbacks remain. Current technology typically relies on forced ventilation (e.g., axial fans installed on the top or side walls) for heat dissipation, while moisture prevention uses electric heating or built-in desiccants. These two functions are inherently contradictory in their physical principles: when the internal temperature rises, the control system activates fans to draw in air for cooling; however, in high-humidity environments (such as the rainy season in southern China or coastal areas where relative humidity often exceeds 80%), the drawn-in air itself contains a large amount of water vapor. This humid air easily condenses into water droplets as it flows over the low-temperature metal inner wall (e.g., after the cabinet cools down at night), adhering to circuit breaker insulators, terminal blocks, or secondary wiring ports. Simultaneously, if electric heating plates are activated at this time to attempt moisture removal, the sudden increase in localized temperature can cause deformation of the plastic casing, thermal fatigue of electronic component solder joints, and even accelerated aging of insulation materials, thus reducing dehumidification efficiency and heat dissipation response speed. Summary of the Invention

[0004] The purpose of this invention is to provide a low-voltage intelligent switchgear with heat dissipation and moisture-proof functions to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a low-voltage intelligent switchgear with heat dissipation and moisture-proof functions, comprising: The switch cabinet has a distributed temperature and humidity sensor array inside, which is used to monitor the temperature and humidity of key heat-generating parts and electrical sensitive areas respectively; A dehumidifying and moisture-proof storage box is installed on the top surface of the switch cabinet. The dehumidifying and moisture-proof storage box has a dehumidifying device that can penetrate and extend into the internal cavity of the switch cabinet. Two moisture-proof drying boxes are symmetrically arranged and are respectively attached to the outer walls of the two sides of the switch cabinet. Each moisture-proof drying box stores hot air or cold air in its inner cavity. The moisture-proof drying box conducts the temperature of the hot air or cold air to the switch cabinet through a conductive component for drying or heat dissipation.

[0006] This preferred option also includes: A connecting box is attached to the bottom of each moisture-proof drying box, and a heat dissipation fan is installed in each connecting box, which blows air into the switch cabinet. Two cooling exhaust fans are symmetrically arranged. Each cooling exhaust fan is installed above the moisture-proof drying box and on the outer wall of the switch cabinet. It is used to draw heat out of the switch cabinet. The cooling blower and the cooling exhaust fan work together to form a circulating air path.

[0007] In this preferred embodiment, air inlet filters are embedded in the lower part of both outer walls of the switch cabinet, the connecting box covers the air inlet filters, and the air inlet end of the cooling fan is aligned with the air inlet filters.

[0008] In this preferred embodiment, exhaust filter ports are provided on the upper part of both outer walls of the switch cabinet, the heat dissipation fan covers the exhaust filter ports, and the air intake end of the heat dissipation fan is aligned with the exhaust filter ports.

[0009] In this preferred embodiment, a through window is provided directly below the dehumidification and moisture-proof storage box and on the top surface of the switch cabinet for the dehumidification device to pass through, and a detachable top cover is fixed to the top surface of the dehumidification and moisture-proof storage box by bolts.

[0010] In a preferred embodiment, a hydraulic lifting rod is longitudinally installed on the inner wall of the detachable top cover, and the dehumidification device includes a lifting frame installed at the bottom lifting end of the hydraulic lifting rod and a moisture-absorbing cotton block disposed in the lifting frame.

[0011] In this preferred embodiment, the lifting frame includes a lower sealing base plate and an upper sealing top plate that can respectively block the through window. When the lifting frame is in the initial position in the dehumidification and moisture-proof storage box, the lower sealing base plate fits into the through window to form an initial blockage. When the lifting frame is lowered into the switch cabinet, the upper sealing top plate fits into the through window to form a dehumidification blockage.

[0012] In this preferred embodiment, a servo motor is installed on the inner wall of the upper sealing top plate, an inner frame is rotatably installed on the inner wall of the lower sealing bottom plate, the moisture-absorbing cotton block is filled and installed in the inner frame, and the vertical output shaft of the servo motor is fixedly connected to the top of the inner frame, so that the servo motor can drive the inner frame to move in the lifting frame. The servo motor operates in both forward and reverse directions, driving the inner frame and the moisture-absorbing cotton block to rotate or swing in both directions within the lifting frame, thus forming a non-contact adsorption of humid gases and moisture.

[0013] In this preferred embodiment, the inner wall of the moisture-proof drying box is bonded with a heat-insulating inner layer, and a second heat-conducting aluminum plate is embedded in the outer wall of the two moisture-proof drying boxes facing the switch cabinet. The second heat-conducting aluminum plate abuts against the outer wall of the switch cabinet, and a detachable side plate is fixed to the opposite side of the two moisture-proof drying boxes by bolts.

[0014] In this preferred embodiment, the surface of the inner insulation layer has a heat-insulating textured surface, and the outer walls of both sides of the switch cabinet are each internally embedded with a first heat-conducting aluminum plate. The inner walls of the two first heat-conducting aluminum plates are integrally connected with multiple heat-conducting fins, and the outer wall of each moisture-proof drying box is internally connected with an air inlet pipe.

[0015] Compared with the prior art, the technical effects and advantages of the present invention are as follows: This low-voltage intelligent switchgear, featuring heat dissipation and moisture protection, utilizes a distributed array of temperature and humidity sensors to monitor the real-time status of key heat-generating components and electrically sensitive areas, providing a precise data foundation for intelligent decision-making. The dehumidifying devices in the dehumidifying and moisture-proof storage box can selectively extend into the cabinet for non-contact moisture absorption, avoiding the corrosion, insulation degradation, or heat dissipation obstruction problems caused by long-term contact between traditional wall-mounted desiccants and the metal inner wall. The moisture-proof drying box indirectly transfers temperature energy to the cabinet through hot / cold air storage and heat-conducting components, maintaining the cabinet's airtightness while achieving gentle overall environmental regulation. Thus, this solution achieves a closed-loop intelligent control function of "sensing—judgment—zonal execution." Compared to existing technologies that rely solely on fixed fan cooling, passive moisture absorption with built-in silica gel desiccants, or blind dehumidification with electric heating plates—this solution significantly improves dehumidification efficiency and heat dissipation response speed, effectively suppresses condensation formation, and avoids the risk of introducing external moisture during heat dissipation. It achieves a comprehensive advantage of high reliability, low power consumption, maintenance-free operation, and full-condition self-adaptation.

[0016] Furthermore, by placing the main dehumidification function outside the cabinet (the dehumidification and moisture-proof storage box), the moisture-absorbing cotton block is only extended into the inner cavity when needed and kept in a non-contact state. This ensures that the cabinet maintains a high IP protection rating (such as IP54 or above) that is completely sealed most of the time, solving the sealing failure problem caused by frequent opening of the cabinet to replace desiccant or install ventilation and dehumidification equipment in existing technologies. At the same time, the moisture-proof drying box adopts an external hot / cold air input + heat-conducting aluminum plate conduction method, replacing the traditional solution of directly installing heaters or semiconductor cooling chips inside the cabinet. This not only reduces the space occupation and electromagnetic interference risk inside the cabinet, but also avoids secondary hazards caused by local overheating or condensation accumulation. Therefore, this technical solution achieves an organic unity of heat dissipation and moisture-proof functions while ensuring electrical safety. Compared with existing low-voltage switchgear, it exhibits superior environmental adaptability and long-term operational stability in complex environments such as humidity, high temperature, and large temperature difference. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the disassembly structure of the dehumidifying and moisture-proof storage box of the present invention; Figure 3 This is a schematic diagram of the lifting frame of the present invention extending from the dehumidifying and moisture-proof storage box; Figure 4 This is a schematic diagram of the connection structure of the lifting frame of the present invention; Figure 5 This is a structural schematic diagram of the inner frame in the rotating state of the present invention; Figure 6 This is a schematic diagram of the connection structure of the inner frame of the present invention; Figure 7 This is a schematic diagram of the structure of the moisture-absorbing cotton block of the present invention extending into the interior of the switch cabinet; Figure 8 This is a schematic diagram showing the disassembled structure of the moisture-proof drying box of the present invention.

[0019] Explanation of reference numerals in the attached figures: In the diagram: 1. Switch cabinet; 2. Dehumidifying and moisture-proof storage box; 3. Moisture-proof drying box; 4. Cooling exhaust fan; 5. Air inlet duct; 6. Connection box; 7. Cooling blower; 8. Removable side panel; 9. Removable top cover; 10. Exhaust filter inlet; 11. Through window; 12. Mounting ear plate; 13. Lifting frame; 14. Lower sealing base plate; 15. Inner frame; 16. Moisture-absorbing cotton block; 17. Upper sealing top plate; 18. Servo motor; 19. Hydraulic lifting rod; 20. Rotating shaft; 21. First heat-conducting aluminum plate; 22. Air inlet filter; 23. Heat-conducting fins; 24. Heat dissipation holes; 25. Insulation inner layer; 26. Insulation textured surface; 27. Second heat-conducting aluminum plate; 28. Mounting steps. Detailed Implementation

[0020] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0021] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this invention, and are explained here together.

[0022] This embodiment provides, for example Figures 1 to 8 The low-voltage intelligent switchgear shown includes: The switch cabinet 1 has a distributed temperature and humidity sensor array inside its cavity, which is used to monitor the temperature and humidity of key heat-generating parts and electrical sensitive areas respectively; A dehumidifying and moisture-proof storage box 2 is installed on the top surface of the switch cabinet 1. The dehumidifying and moisture-proof storage box 2 has a dehumidifying device that can penetrate and extend into the inner cavity of the switch cabinet 1. Two moisture-proof drying boxes 3 are symmetrically arranged and are respectively attached to the outer walls of the two sides of the switch cabinet 1. Each moisture-proof drying box 3 stores hot air or cold air in its inner cavity. The moisture-proof drying box 3 conducts the temperature of the hot air or cold air to the switch cabinet 1 through the conductive component for drying or heat dissipation.

[0023] This embodiment also includes: A connecting box 6 is connected to the bottom of each moisture-proof drying box 3. Each connecting box 6 is equipped with a heat dissipation fan 7, which blows air into the switch cabinet 1. Two symmetrically arranged cooling exhaust fans 4 are installed above the moisture-proof drying box 3 and on the outer wall of the switch cabinet 1. They are used to draw heat from the switch cabinet 1. The cooling blower fan 7 and the cooling exhaust fan 4 work together to form a circulating airflow. The cooling blower fan 7 draws air in from the bottom, and the cooling exhaust fan 4 draws air out from the top. The airflow passes through the key heat-generating areas inside the cabinet, accelerating heat dissipation. This achieves efficient active cooling, which, compared with existing technologies that rely solely on natural convection or single-sided fans, results in dead airflow and uneven heat dissipation. It achieves improved heat dissipation efficiency, more uniform temperature distribution, and effectively prevents local overheating and component burnout. The circulating airflow continuously brings the humid air inside the cabinet to the surface of the suspended moisture-absorbing cotton block 16, significantly increasing the moisture migration rate. Especially under high temperature and high humidity conditions, the fan operation and moisture absorption are triggered simultaneously, forming a "airflow delivery + dynamic adsorption" linkage dehumidification mode. This design creates a functional coupling effect between the originally independent heat dissipation system and the dehumidification system, significantly enhancing the system's comprehensive environmental control capabilities in extreme environments. This synergistic gain effect is something that cannot be achieved by existing technologies where heat dissipation and dehumidification operate in isolation.

[0024] In this embodiment, air inlet filters 22 are embedded through the lower part of both outer walls of the switch cabinet 1. The connecting box 6 covers the air inlet filters 22, and the air inlet end of the cooling fan 7 is aligned with the air inlet filters 22. The air inlet filters 22 block pollutants such as dust and salt spray, while ensuring smooth airflow into the fan inlet. This achieves the dual functions of clean air intake and dust protection. Compared with the problems of open air inlets in the prior art that easily accumulate dust and clog the fan, reduce heat dissipation efficiency, or even cause short circuits, this achieves the effects of extending equipment life, reducing maintenance frequency, and maintaining stable long-term heat dissipation performance.

[0025] In this embodiment, exhaust filter ports 10 are provided through the upper part of both outer walls of the switch cabinet 1. A cooling exhaust fan 4 covers the exhaust filter ports 10, with the suction end of the fan 4 aligned with the exhaust filter port 10. The exhaust filter ports 10 prevent backflow of external foreign objects while venting exhaust air and prevent exposed fan blades from causing safety hazards. This achieves a safe and efficient heat dissipation function. Compared with the existing technology where filterless exhaust ports easily draw in rainwater, insects, or debris, leading to internal contamination, this design improves the IP protection level and ensures the long-term reliable operation of the exhaust system.

[0026] In this embodiment, a through window 11 is provided directly below the dehumidification and moisture-proof storage box 2 and on the top surface of the switch cabinet 1, allowing the dehumidification device to pass through. A removable top cover 9 is fixed to the top surface of the dehumidification and moisture-proof storage box 2 with bolts. The through window 11 provides a passage for the dehumidification device, and the removable top cover 9 allows users to inspect or replace the internal mechanism without disassembling the entire cabinet. This achieves the function of modular maintenance and dynamic sealing. Compared with the existing technology where the built-in desiccant needs to be replaced by opening the cabinet, which damages the overall seal, this method achieves the effects of convenient operation and maintenance, continuous sealing, and reduced human operation risks.

[0027] In this embodiment, a hydraulic lifting rod 19 is longitudinally installed on the inner wall of the detachable top cover 9. The dehumidification device includes a lifting frame 13 installed at the bottom lifting end of the hydraulic lifting rod 19 and a moisture-absorbing cotton block 16 disposed in the lifting frame 13. The hydraulic lifting rod 19 drives the lifting frame 13 downwards within the dehumidification and moisture-proof storage box 2, allowing the lifting frame 13 to extend from the through window 11 into the inner cavity of the switch cabinet 1. This enables the moisture-absorbing cotton block 16 to non-contactly absorb moisture in the inner cavity of the switch cabinet 1, and also allows the moisture-laden air carried away by the airflow to be non-contactly absorbed and carried away by the moisture-absorbing cotton block 16. The hydraulic lifting rod provides stable thrust, ensuring that the moisture-absorbing cotton block is suspended near areas prone to condensation but does not contact the metal inner wall, capturing suspended water droplets through near-field adsorption. This achieves non-contact dynamic dehumidification, which, compared to the problems of corrosion, reduced insulation, or hindered heat dissipation caused by the direct adhesion of absorbent materials to the cabinet wall in existing technologies, avoids electrical safety hazards, improves the targeting of dehumidification, and extends the service life of the absorbent material.

[0028] In this embodiment, the lifting frame 13 includes a lower sealing base plate 14 and an upper sealing top plate 17 capable of sealing the through window 11 respectively. When the lifting frame 13 is in the initial position in the dehumidification and moisture-proof storage box 2, the lower sealing base plate 14 fits into the through window 11 to form an initial seal. When the lifting frame 13 is lowered into the switch cabinet 1, the upper sealing top plate 17 fits into the through window 11 to form a dehumidification seal. The window is sealed by the lower sealing base plate 14 in the initial position and by the upper sealing top plate 17 in the working position, forming a dynamic sealing mechanism with seamless switching. This achieves airtight protection, and compared with the problem of temporary openings in the cabinet caused by the telescopic mechanism in the prior art, allowing moisture to enter, it achieves the effect of maintaining an IP54 or higher protection level without interruption and preventing secondary condensation.

[0029] In this embodiment, a servo motor 18 is installed on the inner wall of the upper sealing top plate 17, and an inner frame 15 is rotatably installed on the inner wall of the lower sealing bottom plate 14. Moisture-absorbing cotton blocks 16 are filled and installed in the inner frame 15. The vertical output shaft of the servo motor 18 is fixedly connected to the top of the inner frame 15, enabling the servo motor 18 to drive the inner frame 15 to move within the lifting frame 13. The hydraulic lifting rod 19 drives the lifting frame 13, causing the moisture-absorbing cotton blocks 16 to extend into the cabinet. The servo motor 18 drives the inner frame 15, causing the moisture-absorbing cotton blocks 16 to rotate or swing in opposite directions. This linkage design allows the moisture-absorbing cotton blocks to achieve not only non-contact adsorption but also... It can actively sweep through high-humidity areas within a limited space. The periodic forward and reverse rotation of the servo motor creates dynamic disturbances in the absorbent cotton block, breaking up localized static air layers within the cabinet and promoting full contact between the humid airflow and the surface of the absorbent material. Simultaneously, the oscillating or rotating motion can cover a larger three-dimensional space, significantly improving the water molecule capture efficiency per unit time. This design not only achieves active dehumidification, which traditional static dehumidification cannot, but also assists in airflow disturbance and balances the temperature and humidity distribution within the cabinet. It avoids the "blind spot condensation" problem where localized microenvironments are excessively humid while the overall sensor fails to alarm, achieving dehumidification uniformity and response sensitivity far exceeding expectations.

[0030] The servo motor 18 performs forward and reverse operation, driving the inner frame 15 and the moisture-absorbing cotton block 16 to rotate or swing in the lifting frame 13, forming a non-contact adsorption of humid gas and moisture.

[0031] A rotating shaft 20 is fixed at the center of the bottom surface of the inner frame 15. The rotating shaft 20 is connected to the lower sealing base plate 14 via a bearing. By rotating the moisture-absorbing cotton block 16 or swinging it slightly in both directions, the moisture absorption range can be increased. The servo motor 18 drives the moisture-absorbing cotton block 16 to move periodically in both directions, breaking up local static air layers, expanding the adsorption coverage area, and enhancing the diffusion rate of water molecules. This achieves a dynamic disturbance-based high-efficiency dehumidification function. Compared with the limitations of existing static moisture-absorbing materials that rely solely on natural diffusion and are inefficient, this technology achieves unexpected results such as improved dehumidification speed, elimination of humidity blind spots, and adaptation to complex airflow environments.

[0032] In this embodiment, an inner insulating layer 25 is bonded to the inner wall of the moisture-proof drying box 3. A second thermally conductive aluminum plate 27 is embedded in the outer wall of the two moisture-proof drying boxes 3 facing the switch cabinet 1, and the second thermally conductive aluminum plate 27 abuts against the outer wall of the switch cabinet 1. Removable side plates 8 are fixed to the opposite sides of the two moisture-proof drying boxes 3 by bolts. An installation step 28 for supporting the removable side plates 8 is provided inside the moisture-proof drying box 3. The insulating inner layer 25 reduces energy loss, the thermally conductive aluminum plate forms a low thermal resistance path, and the removable side plates 8 and the installation step 28 provide stable support and a quick assembly / disassembly interface. This achieves high-efficiency thermal management and modular assembly functions.

[0033] In this embodiment, the surface of the inner heat insulation layer 25 has heat insulation texture 26, and the outer walls of both sides of the switch cabinet 1 are inlaid with a first heat-conducting aluminum plate 21. The inner walls of the two first heat-conducting aluminum plates 21 are integrally connected with multiple heat-conducting fins 23, and the outer wall of each moisture-proof drying box 3 is inlaid with an air inlet pipe 5. Hot or cold air is introduced into the moisture-proof drying box 3 through the air inlet duct 5, ensuring that the inner cavity of the moisture-proof drying box 3 is kept dry or cooled. Heat or cooling is conducted through the second heat-conducting aluminum plate 27 and the first heat-conducting aluminum plate 21, and then through the heat-conducting fins 23 to the inner cavity of the switch cabinet 1. Heat is used for dehumidification and drying, and cooling is used for heat dissipation. The input of hot or cold air through the air inlet duct 5 is determined by the monitoring results of the temperature and humidity sensor array inside the switch cabinet 1. The monitoring results of the temperature and humidity sensor array are transmitted to the PLC inside the switch cabinet 1 through a communication module (such as 4G, LoRa, RS485, Ethernet, etc.). The PLC controls an external hot air blower or cooling fan to input hot or cold air into the air inlet duct 5. In addition, the PLC also controls the timely opening and closing of the servo motor 18, the hydraulic lifting rod 19, and the cooling blower fan 7 and cooling exhaust fan 4. Multiple heat dissipation holes 24 are provided on the inner wall of the lower back of the inner cavity of the switch cabinet 1. The PLC instructs an external fan to input hot air (for dehumidification) or cold air (for auxiliary heat dissipation) based on sensor data. Heat / cold air is efficiently transferred to the cabinet via the second thermally conductive aluminum plate 27 → the first thermally conductive aluminum plate 21 → thermally conductive fins 23, achieving indirect temperature control without air ducts. This realizes a "dual-purpose" thermal management function, achieving a synergistic effect of structural integration, intelligent control, and optimized energy efficiency compared to existing technologies that require separate heaters and radiators, resulting in high costs and complex control. Simultaneously, multiple ventilation holes 24 located on the lower rear of the cabinet further enhance natural convection-assisted heat dissipation, improving the system's passive safety redundancy capability during power outages or standby.

[0034] Working principle This low-voltage intelligent switchgear, equipped with heat dissipation and moisture protection functions, uses a distributed temperature and humidity sensor array to continuously monitor the environmental status of key areas within the switchgear cabinet. Specifically, it collects temperature data at key heat-generating areas (such as main busbar joints and near circuit breaker contacts) to determine overheating; and collects temperature and humidity data in electrically sensitive areas (such as areas containing PLCs and communication modules) to assess the risk of condensation. Sensor data is transmitted to the PLC controller inside the cabinet via analog or digital signals.

[0035] The PLC comprehensively analyzes the collected data based on preset values ​​to determine the current operating mode: If the temperature is high (> the set threshold, such as 55℃) and the humidity is low (< 60% RH), it is determined to be a high-load heat dissipation condition. If the temperature is normal (<45℃) but the humidity is high (>70% RH), it is considered a high humidity and moisture-proof working condition. If both temperature and humidity are high, it is considered a high temperature and high humidity combined working condition, and heat dissipation should be prioritized and moisture diffusion should be prevented. If the temperature and humidity are normal, it will enter standby power-saving mode.

[0036] High-load heat dissipation conditions: The PLC starts the cooling fans 7 on both sides. After the outside air is filtered by the air inlet filter 22, it is introduced into the bottom of the cabinet through the connecting box 6. At the same time, the cooling exhaust fan 4 on the top is started, and hot air is drawn out from the exhaust filter 10, forming a forced convection circulation air path from bottom to top to accelerate the heat dissipation. The moisture-proof drying box 3 is not used for the time being to avoid introducing additional heat sources.

[0037] High humidity and moisture-proof conditions: The PLC controls the external hot air blower to input dry hot air into the air inlet pipe 5. The hot air enters the inner cavity of the moisture-proof drying box 3, heating the heat-insulating inner layer 25 and the second heat-conducting aluminum plate 27. The heat is conducted to the inner cavity of the switch cabinet 1 through the second heat-conducting aluminum plate 27 → the first heat-conducting aluminum plate 21 → the heat-conducting fins 23. The air inside the cabinet is heated gently as a whole, reducing the relative humidity and suppressing condensation. The heat dissipation fan 7 and the heat dissipation exhaust fan 4 are turned off to prevent the circulation of humid air.

[0038] High temperature and high humidity combined working conditions: The cooling blower 7 and cooling exhaust fan 4 are activated first for forced cooling. At the same time, the PLC triggers the dehumidification mechanism in the dehumidification and moisture-proof storage box 2. The hydraulic lifting rod 19 is activated, pushing the lifting frame 13 downward. The lower sealing plate 14 disengages from the through window 11, and the upper sealing plate 17 moves down to seal the window, maintaining the cabinet's seal. The moisture-absorbing cotton block 16 extends into the cabinet along with the lifting frame 13 and hovers in areas prone to condensation (such as the upper part of the back wall), maintaining a gap with the inner wall to achieve non-contact adsorption. The servo motor 18 is activated, driving the inner frame 15 to slowly swing or rotate the moisture-absorbing cotton block 16 in both directions, expanding the adsorption range and actively capturing suspended water droplets and high-humidity air masses in the air. Moist air flows over the surface of the moisture-absorbing cotton block 16 under the action of circulating air, and the moisture is adsorbed by the porous fibers, while the dry air returns to the cabinet.

[0039] Standby power saving mode: All fans, heating, and lifting mechanisms are turned off; only the sensors and PLC operate at low power and continuously monitor the system. When the parameters exceed the limits again, the corresponding control system is automatically activated.

[0040] When the moisture-absorbing cotton block 16 is saturated (which can be monitored by a weight sensor), the PLC controls the hydraulic lifting rod 19 to retract the lifting frame 13 into the dehumidification and moisture-proof storage box 2. The upper sealing plate 17 is removed from the through window 11, and the lower sealing plate 14 reseals the window to restore the seal. The user can remove the removable top cover 9 and take out the moisture-absorbing cotton block 16 for drying or replacement. The removable side plate 8 facilitates the inspection and maintenance of the internal structure of the moisture-proof drying box 3.

[0041] It should be noted that, in this document, relational terms such as "one" and "two" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-voltage intelligent switchgear with heat dissipation and moisture-proof functions, characterized in that, include: The switch cabinet (1) has a distributed temperature and humidity sensor array in its inner cavity, which is used to monitor the temperature and humidity of key heat-generating parts and electrical sensitive areas respectively; A dehumidifying and moisture-proof storage box (2) is installed on the top surface of the switch cabinet (1). The dehumidifying and moisture-proof storage box (2) has a dehumidifying device that can penetrate and extend into the inner cavity of the switch cabinet (1). Two moisture-proof drying boxes (3) are symmetrically arranged and are respectively attached to the outer walls of the two sides of the switch cabinet (1). Each moisture-proof drying box (3) stores hot air or cold air in its inner cavity. The moisture-proof drying box (3) transmits the temperature of the hot air or cold air to the switch cabinet (1) through the conductive component for drying or heat dissipation.

2. A low-voltage intelligent switchgear with heat dissipation and moisture-proof function according to claim 1, characterized in that, Also includes: A connecting box (6) is connected to the bottom surface of each moisture-proof drying box (3), and a heat dissipation fan (7) is installed in each connecting box (6), and the heat dissipation fan (7) blows air into the switch cabinet (1); Two heat dissipation exhaust fans (4) are symmetrically arranged. Each heat dissipation exhaust fan (4) is installed above the moisture-proof drying box (3) and on the outer wall of the switch cabinet (1) to draw out the heat in the switch cabinet (1). The heat dissipation blower (7) and the heat dissipation exhaust fan (4) work together to form a circulating air path.

3. A low-voltage intelligent switchgear with heat dissipation and moisture-proof function according to claim 2, characterized in that: The lower part of the outer walls on both sides of the switch cabinet (1) is inlaid with an air inlet filter (22), the connecting box (6) covers the air inlet filter (22), and the air inlet end of the heat dissipation fan (7) is aligned with the air inlet filter (22).

4. A low-voltage intelligent switchgear with heat dissipation and moisture-proof function according to claim 2, characterized in that: The upper part of the outer walls on both sides of the switch cabinet (1) is provided with exhaust filter ports (10), the heat dissipation fan (4) covers the exhaust filter ports (10), and the air intake end of the heat dissipation fan (4) is aligned with the exhaust filter ports (10).

5. A low-voltage intelligent switchgear with heat dissipation and moisture-proof function according to claim 4, characterized in that: The dehumidifier and moisture-proof storage box (2) is located directly below the top surface of the switch cabinet (1) and has a through window (11) for the dehumidifier to pass through. The top surface of the dehumidifier and moisture-proof storage box (2) is fixed with a detachable top cover (9) by bolts.

6. A low-voltage intelligent switchgear with heat dissipation and moisture-proof function according to claim 5, characterized in that: The inner wall of the detachable top cover (9) is longitudinally equipped with a hydraulic lifting rod (19), and the dehumidification device includes a lifting frame (13) installed at the bottom lifting end of the hydraulic lifting rod (19) and a moisture-absorbing cotton block (16) set in the lifting frame (13).

7. A low-voltage intelligent switchgear with heat dissipation and moisture-proof function according to claim 6, characterized in that: The lifting frame (13) includes a lower sealing base plate (14) and an upper sealing top plate (17) that can respectively block the through window (11). When the lifting frame (13) is in the initial position in the dehumidification and moisture-proof storage box (2), the lower sealing base plate (14) fits into the through window (11) to form an initial blockage. When the lifting frame (13) is lowered into the switch cabinet (1), the upper sealing top plate (17) fits into the through window (11) to form a dehumidification blockage.

8. A low-voltage intelligent switchgear with heat dissipation and moisture-proof function according to claim 7, characterized in that: A servo motor (18) is installed on the inner wall of the upper sealing top plate (17), and an inner frame (15) is rotatably installed on the inner wall of the lower sealing bottom plate (14). The moisture-absorbing cotton block (16) is filled and installed in the inner frame (15). The vertical output shaft of the servo motor (18) is fixedly connected to the top of the inner frame (15), so that the servo motor (18) can drive the inner frame (15) to move in the lifting frame (13). The servo motor (18) performs forward and reverse operation, driving the inner frame (15) and the moisture-absorbing cotton block (16) to rotate or swing in the lifting frame (13) to form a non-contact adsorption of humid gas and moisture.

9. A low-voltage intelligent switchgear with heat dissipation and moisture-proof function according to claim 7, characterized in that: The inner wall of the moisture-proof drying box (3) is bonded with a heat-insulating inner layer (25). The outer wall of the two moisture-proof drying boxes (3) facing the switch cabinet (1) is embedded with a second heat-conducting aluminum plate (27). The second heat-conducting aluminum plate (27) abuts against the outer wall of the switch cabinet (1). The two moisture-proof drying boxes (3) are fixed with detachable side plates (8) by bolts on opposite sides.

10. A low-voltage intelligent switchgear with heat dissipation and moisture-proof function according to claim 9, characterized in that: The surface of the inner heat insulation layer (25) has heat insulation texture (26), and the outer walls of both sides of the switch cabinet (1) are inlaid with a first heat-conducting aluminum plate (21). The inner walls of the two first heat-conducting aluminum plates (21) are integrally connected with multiple heat-conducting fins (23), and the outer wall of each moisture-proof drying box (3) is connected with an air inlet pipe (5).

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