Switch cabinet intelligent moisture-proof and dehumidification device and use method thereof

Abstract

The application relates to an intelligent moisture-proof and dehumidifying device for a switch cabinet and a use method thereof, which comprises a cabinet body and a moisture-proof and dehumidifying master controller installed on the cabinet body. The moisture-proof and dehumidifying master controller comprises: a partition humidity collection module; a moisture cause identification master control module; a classified dehumidifying execution module which is electrically connected with three groups of independent switchable dehumidifying execution units, is started alone or combined by the moisture cause identification master control module as required, and is electrically connected with a cabinet sealing linkage protection module. The cabinet sealing linkage protection module is electrically connected with a ventilation opening electric sealing baffle and a cabinet door gap flexible moisture blocking air bag through linkage control of an electromagnetic valve, realizes linkage control with the classified dehumidifying execution module, and comprises a consumable state monitoring and early warning module, a man-machine interaction display module and an adsorption core humidity saturation detection sensor in a silent internal circulation drying and dehumidifying mechanism. The application has the advantages of accurate partition moisture control, moisture classification regulation and control, cabinet sealing linkage and intelligent consumable monitoring.

Description

Technical Field

[0001] This invention belongs to the field of environmental control technology for power distribution equipment, specifically relating to an intelligent moisture-proof and dehumidifying device for switchgear and its usage method. Background Technology

[0002] At present, high and low voltage switchgear is widely used in power transmission and distribution, industrial production, municipal power distribution and other fields. Switchgear is often placed in underground power distribution rooms, outdoor transformer substations and humid coastal environments. The temperature difference between day and night, external rainwater infiltration and underground moisture rise can easily cause the air humidity inside the cabinet to exceed the standard. Currently, mainstream switchgear dehumidification equipment in the industry is mainly divided into three categories: The first category is the built-in PTC heating dehumidifier, which reduces relative humidity by increasing the overall air temperature inside the cabinet. Its structure consists only of a heating module and an overall temperature and humidity sensor, without a zoned monitoring structure. It can only heat a large area of ​​the cabinet and cannot effectively dehumidify enclosed, narrow, and high-humidity dead zones such as terminal blocks, busbar joints, and cable inlets. Furthermore, prolonged full-area heating can easily cause overheating and aging of precision electronic components such as relay protection devices and intelligent instruments inside the cabinet, shortening the equipment's lifespan. The second category is forced ventilation dehumidifiers, which rely on… The first type relies on fans to achieve air convection and dehumidification between the inside and outside of the cabinet. However, when used in rainy weather or during the plum rain season, this structure will directly draw in high-humidity, cold air from the outside into the cabinet, which will exacerbate the formation of condensation inside. The ventilation openings do not have an adaptive sealing structure, so the problem of continuous backflow of humid air cannot be solved. The third type is the static adsorption dehumidifier, which relies on desiccants such as molecular sieves and calcium chloride to adsorb water vapor. It can only achieve passive and slow dehumidification and cannot cope with short-term sudden increases in humidity. Moreover, there is no intelligent warning function when the desiccant is saturated. It relies entirely on maintenance personnel to conduct regular on-site inspections and replacements, which involves a large amount of maintenance work and is prone to dehumidification failure. In addition, all existing dehumidification devices adopt a single-point overall humidity acquisition mode, which can only control the dehumidification of the entire cabinet space. It cannot distinguish the humidity difference between different chambers of the switch cabinet and different installation positions, nor can it identify different sources of moisture such as condensation due to temperature difference, moisture seepage from gaps, and moisture accumulation due to heat dissipation of internal equipment. The dehumidification operation mode is single and fixed, and it cannot automatically switch the control strategy according to the actual moisture causes on site. At the same time, the existing dehumidification equipment is an independent addition structure, which cannot be linked with the cabinet door sealing and pressure relief ventilation structure of the switch cabinet itself. After the dehumidification operation, there are still moisture intrusion channels in the cabinet gaps, resulting in poor continuous moisture prevention and dehumidification effect and easy rebound failure. The consumables such as molecular sieves and desiccants used in adsorption dehumidification equipment rely on maintenance personnel to conduct regular on-site inspections and replace them. When the consumables become saturated and fail, it cannot be detected in time. Long-term use can still easily lead to electrical safety accidents such as corrosion of metal parts inside the cabinet, creepage of insulation components, short circuit tripping of lines, and switch malfunction. In summary, existing switchgear dehumidification equipment suffers from numerous practical defects, including low dehumidification accuracy, poor adaptability to operating conditions, weak moisture-proof linkage, low level of intelligent operation and maintenance, high energy consumption, and easy damage to electrical components inside the cabinet. These shortcomings prevent it from meeting the current high-standard safety operation and maintenance requirements of power equipment. The market urgently needs a new type of intelligent moisture-proof dehumidification device. Therefore, it is essential to provide an intelligent moisture-proof dehumidification device for switchgear that features zoned and precise humidity control, moisture classification and regulation, cabinet sealing linkage, and intelligent monitoring of consumables, along with its usage method. Summary of the Invention

[0003] (a) Technical issues 1. Solve the problem of precise and targeted dehumidification of high-humidity dead zones in switchgear with different zoning locations: Traditional dehumidification equipment cannot achieve precise local dehumidification of different areas such as busbar compartment, cable compartment, instrument compartment, and terminal block area inside switchgear, and condensation in high-humidity dead zones cannot be completely removed.

[0004] 2. Solve the problem of lack of classification and matching dehumidification strategies for different types of moisture (temperature difference condensation, external seepage, and internal moisture accumulation): Existing dehumidification devices cannot identify the three types of moisture causes (temperature difference condensation, external seepage, and internal moisture accumulation) and cannot automatically match the corresponding dehumidification mode, resulting in poor adaptability to operating conditions.

[0005] 3. Solve the problem of secondary intrusion of humid air after dehumidification is completed due to the lack of linkage between dehumidification operation and the sealing and pressure relief structure of the switch cabinet: During the operation of existing dehumidification equipment, external humid air intrudes in reverse through cabinet gaps and vents, causing repeated failures in dehumidification effect.

[0006] 4. Solve the problem of low operation and maintenance efficiency due to the lack of autonomous monitoring and automatic reminders for saturation loss of dehumidification components: Existing adsorption dehumidification equipment does not have automatic monitoring and reminders for adsorption saturation of consumables, and relies on manual inspection and replacement, resulting in low operation and maintenance efficiency and potential safety hazards due to dehumidification failure.

[0007] 5. Solves the contradictions of using dehumidification in low-temperature environments (which can damage precision instruments) and ventilation in high-temperature environments (which can introduce rainwater and moisture), and the inability to intelligently switch dehumidification modes in different seasons.

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide an intelligent moisture-proof and dehumidification device for switch cabinets, and its usage method, which features zoned and precise humidity control, moisture classification and regulation, cabinet sealing linkage, and intelligent monitoring of consumables.

[0009] The objective of this invention is achieved as follows: Firstly, an intelligent moisture-proof and dehumidification device for switch cabinets, comprising a cabinet and a moisture-proof and dehumidification main control unit installed on the cabinet, wherein the moisture-proof and dehumidification main control unit includes: The partitioned humidity acquisition module is electrically connected to the distributed temperature and humidity sensor probes and condensation sensing patches deployed inside the cabinet, as well as the moisture seepage detection sensors located at the four corners inside the cabinet, via a signal hub board; the signal hub board is located on one side of the upper part of the dehumidification main control unit. Moisture formation identification main control module; The classified dehumidification execution module is electrically connected to three independent and switchable dehumidification execution units, which are individually or in combination as needed by the moisture cause identification main control module; the dehumidification execution unit includes a local directional micro-heating dehumidification mechanism, a silent internal circulation drying dehumidification mechanism, and a controllable flow-limiting ventilation dehumidification mechanism. The cabinet sealing linkage protection module is electrically connected to the electric sealing baffle of the ventilation port and the flexible moisture-blocking airbag in the cabinet door gap through the linkage control solenoid valve, so as to realize linkage control with the classified dehumidification execution module; the linkage control solenoid valve is located above the cabinet sealing linkage protection module. The consumable status monitoring and early warning module includes a power monitoring module installed inside it, an audible and visual alarm indicator light installed in front of it, and a remote signal transmitter installed below it; it also includes a humidity saturation detection sensor for the adsorption core located in the silent internal circulation drying and dehumidification mechanism. The human-computer interaction display module consists of, from top to bottom, an LCD touch screen, a real-time temperature and humidity display interface, and local function buttons.

[0010] In this invention, the zoned humidity acquisition module enables independent humidity acquisition in multiple areas of the cabinet, the moisture generation identification main control module accurately identifies the type of moisture generation, automatically matches the corresponding classified dehumidification execution module to complete targeted dehumidification, and simultaneously links the cabinet sealing and protection module to block the intrusion of external moisture. Combined with the consumable status monitoring and early warning module, the intelligent monitoring and early warning function of consumables enables fully automatic, precise, and closed-loop moisture prevention and dehumidification control inside the switch cabinet. The human-machine interaction display module is electrically connected to the moisture generation identification main control module to display zoned humidity data and equipment operating status in real time.

[0011] Multiple sets of distributed temperature and humidity sensors and condensation sensing patches are set up, and are independently deployed in the switch cabinet busbar compartment, cable entry compartment, instrument compartment, and terminal block area, respectively. The moisture formation identification main control module has an embedded single-chip microcomputer, a moisture judgment and analysis program module, a mode switching relay group, and a data storage chip. It is used to receive the collected data from the zoned humidity acquisition module and distinguish the three types of moisture sources: temperature difference condensation moisture, external infiltration moisture, and equipment heat accumulation moisture. It can also select one or a combination of moisture types to start the classified dehumidification execution module.

[0012] In this invention, the classified dehumidification execution module is divided into three independent dehumidification modes, which are used precisely for different humidity scenarios without interfering with each other; the cabinet sealing linkage structure starts and stops synchronously with the dehumidification mechanism to achieve integrated operation of dehumidification, moisture retention and humidification.

[0013] The electrically sealed baffles for the ventilation openings are located on both sides of the cabinet and correspond to the corresponding controllable flow-limiting ventilation and dehumidification mechanisms. The flexible moisture-blocking airbags for the cabinet door gaps are arranged circumferentially along the assembly gaps between the cabinet body and the cabinet door. Based on the linkage control solenoid valve, the ventilation openings are blocked and the gaps are filled with air and sealed simultaneously when the classified dehumidification execution module is started. The sealing state is released after a delay after the humidity reaches the standard.

[0014] The electrically sealed vent baffle includes a fixed ventilation plate located outside the cabinet and an adjustable ventilation plate located inside the cabinet. The fixed ventilation plate has elongated slots on both the upper and lower sides of its middle section, and limit pins are provided on the outer sides of each slot. Linear reciprocating drive devices for driving the adjustable ventilation plate are provided on both sides of the lower end of the fixed ventilation plate. The adjustable ventilation plate has short slots in the middle section corresponding to the elongated slots. The fixed ventilation plate is fixedly connected to the adjustable ventilation plate by inserting buckles through the elongated slots and short slots. U-shaped openings are provided at the upper and lower ends of the adjustable ventilation plate corresponding to the limit pins.

[0015] Secondly, a method for using an intelligent moisture-proof and dehumidification device for switch cabinets as described above includes the following steps: S1. Embed and fix the moisture-proof and dehumidification main control unit inside the switch cabinet, and complete the layout of distributed temperature and humidity sensor probes and the connection of power supply lines. S2. The device is powered on and initialized. The zoned humidity acquisition module collects temperature and humidity data, condensation signals and moisture seepage data from cabinet gaps in different areas of the switch cabinet in real time around the clock, and transmits the collected data to the moisture cause identification main control module. S3. The moisture formation identification main control module determines the specific type of moisture generated inside the cabinet by comparing and processing data. Specifically, when the moisture is determined to be condensation due to diurnal temperature difference, the localized directional micro-heating dehumidification mechanism is activated; when the moisture is determined to be external infiltration type, the silent internal circulation drying dehumidification mechanism is activated; when the moisture is determined to be equipment heat accumulation type, the controllable flow-limiting ventilation dehumidification mechanism is activated. S4. The moisture cause identification main control module automatically matches and starts the corresponding classification dehumidification execution module according to the judgment result. At the same time, it links the cabinet sealing and protection module to close the ventilation channel and seal the cabinet gaps to prevent the intrusion of external humid air. S5. Continue to perform the corresponding dehumidification operation until the humidity values ​​of all zones of the switchgear are reduced to within the humidity threshold for safe operation of the power equipment. Specifically, the humidity threshold for safe operation of the power equipment is set at 65%RH. When the humidity is below this value, the device enters a dormant humidity-retaining state. S6. After dehumidification reaches the standard, the classified dehumidification execution module will automatically shut down, and the cabinet sealing linkage protection module will maintain the moisture-locking state for a delay to maintain a dry environment inside the cabinet. S7. Consumable status monitoring and early warning module detects the saturation status of drying and adsorption consumables in real time. When the consumables are close to failure, it triggers a local audible and visual warning and pushes a remote replacement prompt. S8: Maintenance personnel can view the operating data on-site through the human-machine interaction display module, and can also manually switch the dehumidification operation mode to complete emergency control.

[0016] The beneficial effects of this invention are: 1. Significantly improved dehumidification accuracy: Adopting a multi-zone independent humidity collection structure, abandoning the traditional uniform dehumidification mode, it can accurately locate high humidity dead corners inside the switch cabinet and complete local decondensation through a directional micro-heating structure. Compared with traditional equipment, the dehumidification efficiency in high humidity areas is improved by more than 40%, completely solving the hidden condensation hazards at terminal blocks and busbar connections.

[0017] 2. Wider range of operating conditions: This device is equipped with three independent dehumidification modes, which can automatically match different scenarios such as temperature difference condensation, external moisture infiltration, and internal moisture accumulation. In low-temperature environments, it will not heat the entire area and damage precision electrical components. In high-temperature environments, it can control ventilation to prevent the introduction of rainwater and moisture. It can stably adapt to various power distribution site environments all year round.

[0018] 3. Enhanced moisture protection: The cabinet features a sealing linkage structure that simultaneously blocks all moisture intrusion channels during the dehumidification process, achieving integrated dehumidification and moisture retention. This effectively prevents secondary backflow of humid air after dehumidification and increases the duration of dryness inside the cabinet by 60%.

[0019] 4. High level of intelligent operation and maintenance, reducing labor costs: Equipped with an intelligent monitoring and early warning structure for consumable saturation, it eliminates the need for maintenance personnel to conduct monthly on-site inspections of the dehumidification equipment. It automatically reminds users when to replace the adsorption consumables, reducing the workload of offline inspections by 80% and preventing power failures caused by dehumidification consumable failures.

[0020] 5. Energy saving and consumption reduction, extending the service life of electrical equipment: Abandoning the traditional long-term high-power full-area heating and uninterrupted ventilation mode, the dehumidification mechanism is started precisely at the required point, reducing the overall operating energy consumption by about 35% compared with traditional dehumidification equipment; at the same time, avoiding high temperature baking and repeated moisture corrosion, it can effectively extend the overall service life of switches, instruments and circuits inside the switch cabinet.

[0021] 6. Strong installation versatility: The whole adopts a modular embedded design, which does not require modification of the original switch cabinet main structure. It is compatible with mainstream high and low voltage switch cabinets, ring network cabinets and outdoor transformer substations on the market. It is convenient to disassemble and maintain, and the on-site modification construction is easy. Attached Figure Description

[0022] Figure 1 This is a block diagram of the overall composition of the present invention.

[0023] Figure 2 This is a front view showing the specific usage state of the present invention.

[0024] Figure 3 This is a side view of the present invention.

[0025] Figure 4 This is a schematic diagram of the localized directional micro-heating dehumidification mechanism of the present invention.

[0026] Figure 5 This is a front view of the localized directional micro-heating dehumidification mechanism of the present invention.

[0027] Figure 6 This is a schematic diagram of the silent internal circulation drying and dehumidification mechanism of the present invention. Figure 1 .

[0028] Figure 7 This is a schematic diagram of the silent internal circulation drying and dehumidification mechanism of the present invention. Figure 2 .

[0029] Figure 8 This is a schematic diagram of the controllable flow-limiting ventilation and dehumidification mechanism of the present invention.

[0030] Figure 9 This is an exploded view of the controllable flow-limiting ventilation and dehumidification mechanism of the present invention.

[0031] Figure 10 This is a schematic diagram of the structure of the electric sealing baffle for the ventilation opening of the present invention.

[0032] Figure 11 This is a flowchart illustrating the usage method of the present invention.

[0033] In the diagram: A. Cabinet 100, Dehumidification and Moisture Control Unit 1, Zoned Humidity Acquisition Module 11, Distributed Temperature and Humidity Sensor Probe 12, Condensation Sensor Patch 13, Gap Moisture Detection Sensor 14, Signal Hub 2, Moisture Formation Identification Main Control Module 3, Classified Dehumidification Execution Module 31, Localized Directional Micro-Heating Dehumidification Mechanism 101, Housing 1011, Thermal Insulation and Protective Side Panel 1012, Directional Temperature Guide Cover 102, Aviation Connector 103, Directional Fan 104, Mounting Base 105. Flexible PTC directional heater; 106. Temperature fuse; 32. Silent internal circulation drying and dehumidification mechanism; 201. Box body; 202. Annular drying adsorption chamber; 203. Detachable molecular sieve adsorption core; 204. Drying air outlet plate; 2041. Snap-on opening and closing air plate; 2042. Filter screen; 2043. Drying sensor; 205. Air inlet; 206. Silent centrifugal internal circulation fan; 207. Press-to-open and close plate assembly; 33. Controllable flow-limiting ventilation and dehumidification mechanism; 301. Base; 30. 2. Adjustable speed ventilation fan 303, dustproof and waterproof one-way ventilation valve 21, cylindrical shell 22, dehumidifying filter cotton layer 23, condenser coil 24, condenser spiral tube 25, main shaft 26, four-blade fan 27, fan blade support frame 28, compressor 29, dual-shaft drive 2011, rubber belt 4, cabinet sealing linkage protection module 41, air vent electric sealing baffle 401, fixed ventilation plate 402, strip-shaped elongated hole 403, limit pin 404, linear reciprocating drive assembly 405. Adjustable ventilation plate 406. Strip-shaped short hole 407. Plug-in buckle 408. U-shaped opening 42. Flexible moisture-blocking airbag for cabinet door gap 43. Linkage control solenoid valve 5. Consumable status monitoring and early warning module 51. Humidity saturation detection sensor for adsorption core 52. Power monitoring module 53. Audible and visual alarm indicator light 54. Remote signal transmitter 6. Human-machine interaction display module 61. LCD touch screen 62. Real-time temperature and humidity display interface 63. Local function buttons. Detailed Implementation

[0034] The purpose of this invention is to overcome the many shortcomings of the existing technology and provide an intelligent moisture-proof and dehumidification device for switch cabinets and its usage method. This invention solves the technical problems of existing switch cabinet dehumidification equipment, such as insufficient accuracy of dehumidification across the entire area, weak moisture adaptation and control capabilities, inability to adapt to different types of moisture, lack of cabinet sealing and linkage protection, lack of intelligent early warning for dehumidification consumables, and prominent contradictions in use under different seasonal operating conditions and high and low temperature operating conditions.

[0035] The present invention will now be further described with reference to the accompanying drawings. Example 1

[0036] like Figure 1-10As shown, an intelligent moisture-proof and dehumidification device for switch cabinets includes a cabinet A and a moisture-proof and dehumidification main control unit 100 installed on the cabinet A. The moisture-proof and dehumidification main control unit 100 includes: The partitioned humidity acquisition module 1 is electrically connected to the distributed temperature and humidity sensor probe 11 and condensation sensing patch 12 installed inside the cabinet A, and the gap moisture detection sensor 13 located at the four corners inside the cabinet A, respectively, through the signal hub 14; the signal hub 14 is located on the upper side of the moisture-proof and dehumidification main control unit 100. Moisture generation cause identification main control module 2; The classified dehumidification execution module 3 is electrically connected to three sets of independent switchable dehumidification execution units, which are individually or in combination as needed by the moisture cause identification main control module 2; the dehumidification execution unit includes a local directional micro-heating dehumidification mechanism 31, a silent internal circulation drying dehumidification mechanism 32, and a controllable flow-limiting ventilation dehumidification mechanism 33. The cabinet sealing linkage protection module 4 is electrically connected to the ventilation port electric sealing baffle 41 and the cabinet door gap flexible moisture-blocking airbag 42 through the linkage control solenoid valve 43, so as to realize linkage control with the classified dehumidification execution module 3; the linkage control solenoid valve 43 is located above the cabinet sealing linkage protection module 4. The consumable status monitoring and early warning module 5 includes a power monitoring module 52 installed inside it, an audible and visual alarm indicator 53 installed in front of it, and a remote signal transmitter 54 installed below it; it also includes an adsorption core humidity saturation detection sensor 51 located in the silent internal circulation drying and dehumidification mechanism 32. The human-computer interaction display module 6 includes, from top to bottom, an LCD touch screen 61, a real-time temperature and humidity display interface 62, and local function buttons 63.

[0037] In this embodiment, the moisture-proof and dehumidifying main control unit is embedded and detachably installed on the side wall of the switch cabinet chamber partition, without occupying the installation space of the main electrical equipment inside the cabinet.

[0038] Multiple sets of the distributed temperature and humidity sensing probes 11 and condensation sensing patches 12 are provided, and are independently deployed for the switch cabinet busbar compartment, cable entry compartment, instrument compartment, and terminal block area, respectively. The moisture formation identification main control module 2 has an embedded single-chip microcomputer, a moisture judgment and analysis program module, a mode switching relay group, and a data storage chip. It is used to receive the collected data from the partitioned humidity acquisition module 1 and distinguish the three types of moisture sources: temperature difference condensation moisture, external infiltration moisture, and equipment heat accumulation moisture. It also selects to start or combines the classified dehumidification execution module 3 according to the moisture type.

[0039] In this embodiment, multiple sets of distributed temperature and humidity sensors and condensation sensing patches are deployed at four key locations: the switchgear busbar area, the cable entry area, the instrument installation area, and the bottom terminal area, respectively, to fully cover the high-humidity and condensation-prone areas. Real-time data collection is performed on the humidity, ambient temperature, local condensation precursor signals, and moisture leakage values ​​from cabinet gaps in different areas. The humidity data for each zone is then synchronously transmitted to the moisture-causing identification main control module. The working principle is as follows: sensors at different locations independently collect data, abandoning the traditional single-point overall collection mode, accurately distinguishing between dry and wet areas inside the cabinet, and pinpointing high-humidity dead zones.

[0040] The moisture formation identification main control module receives data collected from different zones. Based on three criteria—temperature difference, humidity rise rate, and moisture leakage signal—it automatically distinguishes between three types of moisture: condensation caused by day-night temperature difference, external infiltration moisture, and internal moisture caused by equipment heat accumulation. It then autonomously issues corresponding dehumidification control commands. The working principle is as follows: the embedded microcontroller main control chip presets a moisture judgment threshold, and the moisture judgment and analysis program module compares the temperature and humidity change curves of multiple areas to accurately classify the source of moisture and prevent blind dehumidification using a uniform mode.

[0041] The localized directional micro-heating dehumidification mechanism 31 is located in the middle of cabinet A and is arranged towards the high humidity dead corner of the switch cabinet wiring terminals and busbar overlap. It includes a housing 101. A heat-insulating protective side plate 1011 is detachably installed on the side of the housing 101 facing the inside of cabinet A. Multiple directional temperature guide covers 1012 are arranged sequentially from top to bottom on the right side of the heat-insulating protective side plate 1011. An aviation plug 102 that is electrically connected to the classified dehumidification execution module 3 is arranged on the lower side of one side of the housing 101. A directional fan 103 is installed inside the housing 101. A flexible PTC directional heater 105 is arranged on the right side of the directional fan 103. The upper and lower ends of the flexible PTC directional heater 105 are fixed to the inner wall of the housing 101 by mounting bases 104, and a temperature fuse 106 is arranged at the upper end of the flexible PTC directional heater 105.

[0042] In this embodiment, the localized directional micro-heating dehumidification mechanism only targets high-humidity, narrow dead corners such as wiring terminals and busbar connections to raise the temperature in a targeted, small area to remove condensation, without dissipating heat to the entire cabinet, thus avoiding overheating of precision instruments; its applicable scenario is: localized condensation caused by low-temperature day-night temperature differences.

[0043] The silent internal circulation drying and dehumidification mechanism 32 is located on the lower left and right sides of the cabinet A, including a box 201. Inside the box 201, there are two interconnected annular drying adsorption chambers 202 arranged side by side. On the lower left side of the annular drying adsorption chamber 202, there is a detachable molecular sieve adsorption core 203 that is attached to the humidity saturation detection sensor 51 of the adsorption core. On the middle right side, there is a drying air outlet plate 204. On the top left side of the annular drying adsorption chamber 202, there is an air inlet 205. On the top right side, there is a silent centrifugal internal circulation fan 206. A press-to-open and close plate assembly 207 is installed at the air inlet 205. The drying air outlet plate 204 includes a filter screen 2042 located inside the annular drying adsorption chamber 202 and a snap-on opening and closing air plate 2041 that is movably connected to the annular drying adsorption chamber 202. A drying sensor 2043 is located above the front of the filter screen 2042.

[0044] In this embodiment, the silent internal circulation drying and dehumidification mechanism is used to achieve closed-loop air circulation and drying inside the cabinet, without exchanging with the outside air and preventing the entry of outside moisture. It is applicable to rainy weather and high-humidity plum rain season when the outside moisture seeps in. The silent centrifugal internal circulation fan draws the air inside the cabinet into the annular drying adsorption chamber through the air inlet. The detachable molecular sieve adsorption core adsorbs the air, and then the dry air is discharged through the drying air outlet plate. The filter screen filters the air, and the drying sensor is used to detect the air drying quality at the drying air outlet plate, thereby realizing the air circulation and drying inside the cabinet.

[0045] The controllable flow-limiting ventilation and dehumidification mechanism 33 is located at the bottom of cabinet A and includes a base 301. An adjustable speed ventilation fan 302 is provided above the base 301. Dustproof and waterproof one-way ventilation valves 303 are installed at both ends of the adjustable speed ventilation fan 302 to enable one-way airflow from inside the cabinet to the outside. The two ends of the ventilation fan correspond to the two sides of cabinet A respectively.

[0046] In this embodiment, the controllable flow-limiting ventilation and dehumidification mechanism is used to complete the exhaust of residual heat and moisture inside the cabinet at a low speed in hot and dry weather, and the one-way valve prevents the backflow of external moisture; the applicable scenario is: heat dissipation and moisture accumulation of equipment inside the cabinet in summer.

[0047] The adjustable speed ventilation fan 302 includes a cylindrical shell 21 consisting of two semicircles fastened together. Both ends of the cylindrical shell 21 are provided with dehumidifying filter cotton layers 22 on the inner side relative to the dustproof and waterproof one-way ventilation valve 303. Inside the cylindrical shell 21, a straight and meandering condenser coil 23 is provided on one side and a condenser spiral tube 24 is provided on the other side. The condenser coil 23 and the condenser spiral tube 24 are connected to the compressor 28 located inside the base 301.

[0048] Each of the dehumidifying filter cotton layers 22 is equipped with a four-blade fan 26. The four-blade fan 26 is installed at both ends of the main shaft 25 that passes through the condenser coil 23 and the condenser spiral tube 24. Multiple "T"-shaped fan blade support frames 27 are arranged on the main shaft 25 from left to right. A dual-shaft driver 29 is provided on the top of the compressor 28. The dual-shaft driver 29 is connected to the main shaft 25 through a rubber belt 2011.

[0049] In this embodiment, the dual-axis drive drives the main shaft to move via a rubber belt, which in turn drives the four-blade fans at both ends to rotate. Together with the dehumidifying filter cotton layers at both ends, it realizes the exhaust of residual heat and dehumidification of the cabinet. The compressor, condenser spiral tube and condenser spiral tube work together to achieve rapid dehumidification. The adjustable speed ventilation fan removes the residual heat and moisture inside the cabinet. The dustproof and waterproof one-way ventilation valve prevents the backflow of external moisture.

[0050] The electrically sealed baffle 41 of the ventilation opening is set on both sides of the cabinet A and corresponds to the corresponding controllable flow limiting ventilation and dehumidification mechanism 33. The flexible moisture-blocking airbag 42 of the cabinet door gap is arranged circumferentially along the assembly gap between the cabinet A and the cabinet door. Based on the linkage control solenoid valve 43, the ventilation opening is blocked and the gap is filled with air when the classified dehumidification execution module 3 is started. The sealing state is released after a delay after the humidity reaches the standard.

[0051] In this embodiment, the cabinet sealing linkage protection module is used to automatically close the original ventilation openings of the cabinet through the electric sealing baffle of the ventilation opening when the dehumidification device is started and running, and to use the flexible moisture-blocking airbag in the cabinet door gap to inflate and seal the cabinet door assembly gap, cutting off the channel for the intrusion of external humid air; after the dehumidification reaches the standard, the seal is released after a delay to maintain a stable and dry environment inside the cabinet; the working principle is: to be synchronously linked with the dehumidification actuator to realize the closed-loop protection of the entire process of "dehumidification operation - sealing and moisture locking - drying and moisturizing".

[0052] The electrically sealed baffle 41 for the ventilation opening includes a fixed ventilation plate 401 disposed outside the cabinet A and an adjustable ventilation plate 405 disposed inside the cabinet A. The fixed ventilation plate 401 has elongated slots 402 on both the upper and lower sides of its middle section, and limit pins 403 are provided on the outer sides of the elongated slots 402. The fixed ventilation plate 401 has linear reciprocating drive devices 404 on both sides of its lower end for driving the adjustable ventilation plate 405. The adjustable ventilation plate 405 has short slots 406 in the middle section corresponding to the elongated slots 402. The fixed ventilation plate 401 is fixedly connected to the adjustable ventilation plate 405 by inserting buckles 407 through the elongated slots 402 and the short slots 406. The adjustable ventilation plate 405 has U-shaped openings 408 at both the upper and lower ends corresponding to the limit pins 403.

[0053] In this embodiment, the working principle of the electric sealing baffle for the ventilation openings is as follows: both the fixed ventilation plate located outside the cabinet and the adjustable ventilation plate located inside the cabinet have multiple natural ventilation openings, such as... Figure 10 As shown, natural ventilation openings are arranged in two rows on the fixed ventilation plate and the adjustable ventilation plate, with multiple openings spaced apart in each row. The natural ventilation openings on the fixed and adjustable ventilation plates correspond one-to-one. Inserting clips pass through elongated and short slots in sequence, connecting the fixed and adjustable ventilation plates together. When it is necessary to open the electrically sealed ventilation opening baffle, simply activate the linear reciprocating drive device. This device pushes the adjustable ventilation plate relative to the fixed ventilation plate (the adjustable ventilation plate moves the inserting clips within the corresponding elongated slots). At this time, the natural ventilation openings on the fixed and adjustable ventilation plates... The ventilation openings are staggered to achieve the ventilation opening effect. As the adjustable ventilation plate continues to move, the ventilation area increases until the ventilation openings correspond one-to-one, at which point the ventilation area is at its maximum. The limiting pin and the U-shaped opening work together to limit the displacement of the adjustable ventilation plate. When it is necessary to close the electric sealing baffle of the ventilation opening, the linear reciprocating drive device is activated. The linear reciprocating drive device drives the adjustable ventilation plate to move, so that the ventilation holes between the fixed ventilation plate and the adjustable ventilation plate are staggered until they are completely separated. This allows the adjustable ventilation plate to close the ventilation opening on the fixed ventilation plate, thus achieving the closed state of the electric sealing baffle of the ventilation opening.

[0054] Case Study 1: Application of Switchgear in Underground Power Distribution Room (High Humidity and Seepage Scenarios) ①On-site installation: The moisture-proof and dehumidification main control unit is embedded in the side wall of the 10kV medium-voltage switchgear chamber in the underground power distribution room. Four humidity sensor probes are installed in sequence and fixed in the busbar room, cable room, instrument compartment and bottom wiring area respectively. The power supply line of the device is connected to the secondary control power supply of the switchgear.

[0055] ② Actual operation steps Step 1: Connect the device to the power supply. The human-machine interface display screen will light up automatically and display the initial humidity values ​​of each zone after initialization. Step 2: The main control module automatically identifies that the moisture in the underground power distribution room is mainly due to groundwater vapor infiltration, and automatically switches to the internal circulation closed drying and dehumidification mode. Step 3: Simultaneously activate the electric sealing baffle to close the cabinet's natural ventilation openings, and inflate the moisture-proof airbags to seal the gaps in the cabinet doors; Step 4: A silent internal circulation fan drives the air inside the cabinet to continuously flow through the molecular sieve adsorption core, completing the closed-loop drying process. Step 5: When the humidity in all zones stabilizes and drops below 60%RH, the device will automatically shut down to maintain humidity, and the sealing structure will slowly release after a 30-minute delay.

[0056] ③ Actual measurement of implementation effect: The normal ambient humidity of the underground power distribution room is 82%-88%RH. After using this device, the humidity of the entire cabinet can be stably controlled within the range of 55%-62%RH in a single dehumidification cycle of 45 minutes. There is no intrusion of external underground moisture, no rust on the metal parts inside the cabinet, and the relay protection instruments operate at normal temperatures without overheating abnormalities.

[0057] This device is embedded inside a 10kV high-voltage switchgear in an underground power distribution room. Four humidity sensor probes are deployed in different zones, and the secondary control power supply is connected. After the device is started, it automatically detects that the ambient humidity is mainly due to underground water vapor infiltration. It automatically closes the original ventilation openings of the cabinet and starts the internal circulation closed drying and dehumidification mode. The internal circulation airflow drives the air to flow through the adsorption core to complete the water vapor adsorption. Within 45 minutes, the humidity inside the cabinet is reduced from 85%RH to below 60%RH. After dehumidification is completed, it is sealed and locked for 30 minutes to effectively prevent the continuous infiltration of underground moisture. With long-term use, there is no metal corrosion or wiring moisture failure inside the cabinet.

[0058] This invention relates to an intelligent moisture-proof and dehumidification device for switchgear and its usage method. It is applied to the intelligent zoned moisture-proof and dehumidification system inside high and low voltage switchgear, ring main units, and outdoor transformer substations. It is suitable for intelligent environmental control operations to prevent condensation, rust, and moisture inside switchgear in underground power distribution rooms, coastal high-humidity areas, factory high-temperature power distribution rooms, and outdoor open-air power distribution scenarios. In use, this invention accurately collects humidity data based on zoned points, targeting high-humidity dead zones for dehumidification, resulting in higher dehumidification efficiency and completely eliminating hidden condensation safety hazards. This invention can automatically identify three different moisture sources and intelligently switch dehumidification operation modes, adapting to various power distribution sites in all seasons and scenarios. This invention also includes a cabinet... The sealed, interconnected structure blocks the intrusion of humid air from the outside, significantly extending the time the dry environment inside the cabinet is maintained. This invention incorporates an intelligent monitoring and early warning system for consumable saturation, reducing offline maintenance and inspection workload and proactively mitigating the risk of dehumidification failure. The modular dehumidification structure, activated on demand, effectively reduces equipment energy consumption while preventing damage to precision electrical components from heat and moisture, extending the overall lifespan of the power distribution equipment. The overall modular embedded design requires no modification to the original switchgear structure, making installation convenient, highly versatile, and easy to promote in large-scale deployment. This invention offers advantages such as zoned precise humidity control, moisture classification and regulation, cabinet sealing linkage, and intelligent consumable monitoring. Example 2

[0059] like Figure 11 As shown, an intelligent dehumidification method based on the intelligent dehumidification device for switchgear described above includes the following steps: S1. Embed and fix the moisture-proof and dehumidification main control unit 100 inside the switch cabinet, and complete the arrangement of 11 distributed temperature and humidity sensor probes and connect the power supply line. S2. The device is powered on and initialized. The zoned humidity acquisition module 1 collects temperature and humidity data, condensation signals and moisture seepage data from cabinet gaps in different areas of the switch cabinet in real time around the clock, and transmits the collected data to the moisture cause identification main control module 2. S3, the moisture cause identification main control module 2 determines the specific type of moisture generated inside the cabinet by comparing and processing data; Specifically, when the moisture is determined to be condensation due to diurnal temperature difference, the localized directional micro-heating dehumidification mechanism 31 is activated; when the moisture is determined to be external infiltration type, the silent internal circulation drying dehumidification mechanism 32 is activated; when the moisture is determined to be equipment heat accumulation type, the controllable flow-limiting ventilation dehumidification mechanism 33 is activated. S4. The moisture cause identification main control module 2 automatically matches and starts the corresponding classification dehumidification execution module 3 according to the judgment result, and at the same time, it links the cabinet sealing linkage protection module 4 to close the ventilation channel and seal the cabinet gaps to prevent the intrusion of external humid air. S5. Continue to perform the corresponding dehumidification operation until the humidity values ​​of all zones of the switchgear are reduced to within the humidity threshold for safe operation of the power equipment. Specifically, the humidity threshold for safe operation of the power equipment is set at 65%RH. When the humidity is below this value, the device enters a dormant humidity-retaining state. S6. After dehumidification reaches the standard, the classified dehumidification execution module 3 is automatically shut down, and the cabinet sealing linkage protection module 4 maintains the moisture-locking state for a delay to maintain a dry environment inside the cabinet. S7, Consumable Status Monitoring and Early Warning Module 5, detects the saturation status of drying and adsorption consumables in real time. When the consumables are close to failure, a local audible and visual warning is triggered and a remote replacement prompt is pushed. S8. Maintenance personnel can view the operating data on-site through the human-machine interaction display module 6, and can also manually switch the dehumidification operation mode to complete emergency control.

[0060] In this embodiment, the method of the present invention is based on a full-process moisture-proof and dehumidification system consisting of a data acquisition module, a main control identification module, a dehumidification execution module, a sealing linkage module, an early warning display module, and a remote operation and maintenance terminal. The consumable status monitoring and early warning module uses a humidity saturation detection sensor to monitor the water vapor adsorption saturation of the molecular sieve adsorption core in real time. When the adsorption amount of the consumable reaches the rated threshold, a local audible and visual alarm is triggered using an indicator light. Simultaneously, a replacement reminder signal is sent to the back-end operation and maintenance platform via a remote signal transmitter, completely replacing manual periodic inspections and accurately controlling the lifespan of the consumables.

[0061] The human-machine interaction display module is based on an LCD touch screen and a real-time temperature and humidity display interface to intuitively view the humidity values ​​of each zone, the current dehumidification mode, the remaining service life of consumables, and equipment operation fault codes on site. It also supports manual switching of dehumidification modes on site using local function buttons.

[0062] Case Study 2: Application of Outdoor Transformer Switchgear (During-Night Temperature Difference Condensation Scenario) ① Installation and layout: The device is fixed inside the low-voltage switchgear of the outdoor transformer substation, with a focus on attaching the directional condensation sensing patch to the densely packed area of ​​the switch terminals.

[0063] ②Use the running steps Step 1: The device is on standby for 24 hours for monitoring. When the ambient temperature drops sharply at night, causing signs of condensation due to temperature difference, the zone sensor quickly captures the signal of a sudden increase in local humidity. Step 2: The main controller determines that the condensation is localized due to temperature difference, automatically shuts off the ventilation structure, and starts the localized directional micro-heating dehumidification unit; Step 3: The flexible directional heating element heats only a small area of ​​the terminal with high humidity, quickly eliminating surface condensation. Step 4: Once the local condensation is eliminated and the humidity returns to a safe threshold, the directional heating mechanism immediately stops working to prevent heat from spreading.

[0064] ③ Implementation effect: Outdoor day and night temperature difference of more than 15℃ can easily cause condensation on the terminals. Using traditional whole-area heaters can easily cause the instruments to malfunction. This embodiment only removes condensation locally and precisely. The temperature fluctuation of the precision electronic components in the cabinet is ≤3℃. The condensation removal rate is 100%, and there is no heat damage to any components.

[0065] Outdoor transformer substations are located in environments with large temperature differences between day and night, making them prone to condensation at switch terminals. This invention uses condensation sensing patches to quickly detect abnormal increases in local humidity. The main control module determines this as condensation due to temperature differences and activates only a localized, directional micro-heating structure to quickly eliminate condensation on the terminal surface in a small area. This prevents heat from being dissipated over a large area into the cabinet, effectively protecting the precision measuring and control instruments inside the transformer substation from high temperatures and completely solving the problem of condensation tripping in outdoor switchgear during winter.

[0066] This invention relates to an intelligent moisture-proof and dehumidification device for switchgear and its usage method. It involves intelligent control equipment for internal moisture-proof and dehumidification of medium and high voltage switchgear, primarily applied in scenarios involving moisture-proofing, condensation prevention, and corrosion prevention of 10kV and below high and low voltage switchgear, ring main units, and distribution cabinets in outdoor power distribution rooms, underground power distribution rooms, damp factory areas, and coastal high-humidity areas. During use, after the device is powered on, the zoned humidity acquisition module collects temperature and humidity, condensation signals, and moisture seepage data from gaps at multiple points within the switchgear in real time, 24 / 7. The moisture formation identification main control module analyzes the collected data to determine the specific type of moisture generated inside the cabinet. Based on the moisture type, the corresponding dehumidification execution unit is automatically activated to achieve localized dehumidification. The system features intelligent switching between directional dehumidification, internal circulation closed-loop dehumidification, and flow-limited ventilation dehumidification. Simultaneously, dehumidification operation triggers the cabinet sealing linkage protection module, sealing cabinet vents and gaps to prevent external moisture intrusion. When the humidity in each zone drops to the safe operating humidity threshold for electrical equipment (≤65%RH), the moisture-causing identification main control module automatically pauses the dehumidification mechanism, and the sealing structure maintains a moisture-locking state for a delay. The consumables monitoring module monitors the saturation status of the drying adsorption core in real time, issuing a replacement warning when it is nearing failure. Maintenance personnel can view all equipment operating data and status through a local display screen or remote maintenance terminal. This invention offers advantages such as precise zoned humidity control, moisture classification and regulation, cabinet sealing linkage, and intelligent consumables monitoring.

[0067] Case Study 3: Application of Switchgear in High-Temperature Power Distribution Rooms in Factory Areas (Internal Heat and Moisture Accumulation Scenarios) ① Application Deployment: Multiple units are installed in batches in the power distribution cabinet of the high-temperature power distribution room in the factory area, and the adjustable speed ventilation and dehumidification settings are debugged.

[0068] ② Usage process: When the ambient temperature is higher than 32℃ in summer, the electrical equipment inside the cabinet generates internal moisture due to heat dissipation. The main control automatically switches to low-speed flow-limiting ventilation and dehumidification mode, and the one-way waterproof ventilation valve opens to slowly exhaust the residual heat and moisture inside the cabinet. High-humidity and hot air from the outside cannot flow in the reverse direction.

[0069] ③ Implementation results: In the high-temperature environment of the power distribution room, the heat dissipation and moisture of the equipment inside the cabinet are quickly discharged, there is no accumulation of heat and moisture inside the cabinet, there is no risk of moisture creep of the insulation components, and no rainwater or dust enters the cabinet during ventilation operation. The equipment tripping failure rate has decreased by 75% compared with the past.

[0070] In summer, the internal temperature of the power distribution room in the factory is high, and the electrical equipment in the switch cabinet generates a lot of internal moisture due to heat dissipation. This invention automatically switches to a low-speed, current-limiting ventilation and dehumidification mode, relying on a one-way ventilation structure to slowly expel the residual heat and moisture inside the cabinet. External hot and humid air cannot flow in the opposite direction, which not only meets the dehumidification and heat dissipation requirements, but also prevents rainwater and dust from entering the cabinet, greatly reducing the failure rate of power distribution equipment during the high-temperature season.

[0071] The structures, connections, and usage methods not described in detail in this invention are all existing conventional technologies in the field. This invention focuses on protecting the core innovative structures of the zoned humidity acquisition layout, the moisture classification and identification logic, the multi-mode dehumidification linkage structure, and the cabinet sealing and collaborative humidity control. All equivalent modifications and substitutions made based on the technical solutions of this invention fall within the protection scope of this invention.

Claims

1. An intelligent moisture-proof and dehumidification device for switch cabinets, comprising a cabinet and a moisture-proof and dehumidification main control unit installed on the cabinet, characterized in that: The dehumidification and moisture-proof main control unit includes: The partitioned humidity acquisition module is electrically connected to the distributed temperature and humidity sensor probes and condensation sensing patches deployed inside the cabinet, as well as the moisture seepage detection sensors located at the four corners inside the cabinet, via a signal hub board; the signal hub board is located on one side of the upper part of the dehumidification main control unit. Moisture formation identification main control module; The classified dehumidification execution module is electrically connected to three independent and switchable dehumidification execution units, which are individually or in combination as needed by the moisture cause identification main control module; the dehumidification execution unit includes a local directional micro-heating dehumidification mechanism, a silent internal circulation drying dehumidification mechanism, and a controllable flow-limiting ventilation dehumidification mechanism. The cabinet sealing linkage protection module is electrically connected to the electric sealing baffle of the ventilation port and the flexible moisture-blocking airbag in the cabinet door gap through the linkage control solenoid valve, so as to realize linkage control with the classified dehumidification execution module; the linkage control solenoid valve is located above the cabinet sealing linkage protection module. The consumable status monitoring and early warning module includes a power monitoring module installed inside it, an audible and visual alarm indicator light installed in front of it, and a remote signal transmitter installed below it; it also includes a humidity saturation detection sensor for the adsorption core located in the silent internal circulation drying and dehumidification mechanism. The human-computer interaction display module consists of, from top to bottom, an LCD touch screen, a real-time temperature and humidity display interface, and local function buttons.

2. The intelligent moisture-proof and dehumidifying device for switchgear as described in claim 1, characterized in that: Multiple sets of distributed temperature and humidity sensors and condensation sensing patches are set up, and are independently deployed in the switch cabinet busbar compartment, cable entry compartment, instrument compartment, and terminal block area, respectively. The moisture formation identification main control module has an embedded single-chip microcomputer, a moisture judgment and analysis program module, a mode switching relay group, and a data storage chip. It is used to receive the collected data from the zoned humidity acquisition module and distinguish the three types of moisture sources: temperature difference condensation moisture, external infiltration moisture, and equipment heat accumulation moisture. It can also select one or a combination of moisture types to start the classified dehumidification execution module.

3. The intelligent moisture-proof and dehumidifying device for switchgear as described in claim 2, characterized in that: The localized directional micro-heating dehumidification mechanism is located in the middle of the cabinet and is positioned towards the high-humidity dead corners of the switch cabinet wiring terminals and busbar connections. It includes a housing, on which a heat-insulating protective side panel is detachably installed. Multiple directional temperature guide covers are arranged sequentially from top to bottom on the right side of the heat-insulating protective side panel. An aviation plug for electrical connection to the classified dehumidification execution module is located on the lower side of one side of the housing. A directional fan is installed inside the housing, and a flexible PTC directional heater is located on the right side of the directional fan. The upper and lower ends of the flexible PTC directional heater are fixed to the inner wall of the housing by mounting brackets, and a temperature fuse is installed at the upper end of the flexible PTC directional heater.

4. The intelligent moisture-proof and dehumidifying device for switchgear as described in claim 2, characterized in that: The silent internal circulation drying and dehumidification mechanism is located on the lower left and right sides of the cabinet, including a box. Inside the box, there are two interconnected annular drying adsorption chambers arranged side by side. A detachable molecular sieve adsorption core is located on the lower left side of the annular drying adsorption chamber and is attached to the humidity saturation detection sensor of the adsorption core. A drying air outlet is located in the middle right side of the annular drying adsorption chamber. An air inlet is located on the top left side of the annular drying adsorption chamber, and a silent centrifugal internal circulation fan is installed on the top right side. A press-to-open and close plate assembly is installed at the air inlet. The drying air outlet includes a filter screen located inside the annular drying adsorption chamber and a snap-on opening and closing air plate that is movably connected to the annular drying adsorption chamber. A drying sensor is located above and in front of the filter screen.

5. The intelligent moisture-proof and dehumidifying device for switchgear as described in claim 2, characterized in that: The controllable flow-limiting ventilation and dehumidification mechanism is located at the bottom of the cabinet and includes a base. An adjustable speed ventilation fan is installed above the base. Dustproof and waterproof one-way ventilation valves are installed at both ends of the adjustable speed ventilation fan to enable one-way airflow from inside the cabinet to the outside. The two ends of the ventilation fan correspond to the two sides of the cabinet.

6. The intelligent moisture-proof and dehumidifying device for switchgear as described in claim 5, characterized in that: The adjustable speed ventilation fan includes a cylindrical shell consisting of two semicircles that are fastened together. Both ends of the cylindrical shell are provided with dehumidifying filter cotton layers on the inner side relative to the dustproof and waterproof one-way ventilation valve. A straight and meandering condenser coil is provided on one side of the interior of the cylindrical shell, and a condenser spiral tube is provided on the other side. The condenser coil and the condenser spiral tube are connected to a compressor located inside the base.

7. The intelligent moisture-proof and dehumidifying device for switchgear as described in claim 6, characterized in that: Each of the dehumidifying filter cotton layers is equipped with a four-blade fan. The four-blade fan is installed at both ends of the main shaft that passes through the condenser coil and the condenser spiral tube. Multiple "T"-shaped fan blade support frames are arranged at intervals from left to right on the main shaft. A dual-shaft driver is installed on the top of the compressor. The dual-shaft driver is connected to the main shaft through a rubber belt.

8. The intelligent moisture-proof and dehumidifying device for switchgear as described in claim 1, characterized in that: The electrically sealed baffles for the ventilation openings are located on both sides of the cabinet and correspond to the corresponding controllable flow-limiting ventilation and dehumidification mechanisms. The flexible moisture-blocking airbags for the cabinet door gaps are arranged circumferentially along the assembly gaps between the cabinet body and the cabinet door. Based on the linkage control solenoid valve, the ventilation openings are blocked and the gaps are filled with air and sealed simultaneously when the classified dehumidification execution module is started. The sealing state is released after a delay after the humidity reaches the standard.

9. The intelligent moisture-proof and dehumidifying device for switchgear as described in claim 8, characterized in that: The electrically sealed vent baffle includes a fixed ventilation plate located outside the cabinet and an adjustable ventilation plate located inside the cabinet. The fixed ventilation plate has elongated slots on both the upper and lower sides of its middle section, and limit pins are provided on the outer sides of each slot. Linear reciprocating drive devices for driving the adjustable ventilation plate are provided on both sides of the lower end of the fixed ventilation plate. The adjustable ventilation plate has short slots in the middle section corresponding to the elongated slots. The fixed ventilation plate is fixedly connected to the adjustable ventilation plate by inserting buckles through the elongated slots and short slots. U-shaped openings are provided at the upper and lower ends of the adjustable ventilation plate corresponding to the limit pins.

10. A method for using an intelligent moisture-proof and dehumidification device for switchgear as described in any one of claims 1-9, characterized in that: Includes the following steps: S1. Embed and fix the moisture-proof and dehumidification main control unit inside the switch cabinet, and complete the layout of distributed temperature and humidity sensor probes and the connection of power supply lines. S2. The device is powered on and initialized. The zoned humidity acquisition module collects temperature and humidity data, condensation signals and moisture seepage data from cabinet gaps in different areas of the switch cabinet in real time around the clock, and transmits the collected data to the moisture cause identification main control module. S3. The moisture formation identification main control module determines the specific type of moisture generated inside the cabinet by comparing and processing data. Specifically, when the moisture is determined to be condensation due to diurnal temperature difference, the localized directional micro-heating dehumidification mechanism is activated; when the moisture is determined to be external infiltration type, the silent internal circulation drying dehumidification mechanism is activated; when the moisture is determined to be equipment heat accumulation type, the controllable flow-limiting ventilation dehumidification mechanism is activated. S4. The moisture cause identification main control module automatically matches and starts the corresponding classification dehumidification execution module according to the judgment result. At the same time, it links the cabinet sealing and protection module to close the ventilation channel and seal the cabinet gaps to prevent the intrusion of external humid air. S5. Continue to perform the corresponding dehumidification operation until the humidity values ​​of all zones of the switchgear are reduced to within the humidity threshold for safe operation of the power equipment. Specifically, the humidity threshold for safe operation of the power equipment is set at 65%RH. When the humidity is below this value, the device enters a dormant humidity-retaining state. S6. After dehumidification reaches the standard, the classified dehumidification execution module will automatically shut down, and the cabinet sealing linkage protection module will maintain the moisture-locking state for a delay to maintain a dry environment inside the cabinet. S7. Consumable status monitoring and early warning module detects the saturation status of drying and adsorption consumables in real time. When the consumables are close to failure, it triggers a local audible and visual warning and pushes a remote replacement prompt. S8: Maintenance personnel can view the operating data on-site through the human-machine interaction display module, and can also manually switch the dehumidification operation mode to complete emergency control.

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