Intelligent dehumidifying and cooling high-voltage switch cabinet for photovoltaic field

Abstract

The invention discloses an intelligent dehumidifying and cooling high-voltage switch cabinet for a photovoltaic field. The intelligent dehumidifying and cooling high-voltage switch cabinet comprises a cabinet body, an intelligent environment sensing device and a composite dehumidifying and cooling device. The intelligent environment sensing device collects environment data in the cabinet in real time through a temperature sensor, a humidity sensor, an illumination intensity sensor and an air pressure sensor, and the environment data is processed by the controller and then controls the combined type dehumidifying and cooling device to operate. The combined type dehumidifying and cooling device comprises various assemblies, various dehumidifying and cooling states can be achieved, and the primary dehumidifying rotating wheel and the advanced dehumidifying rotating wheel are matched with the heating system to complete dehumidifying and regenerating circulation. A fault diagnosis and emergency processing module is further arranged, faults can be predicted, and the operation mode can be automatically adjusted. Compared with the prior art, intelligent sensing, accurate regulation and control, high efficiency and energy saving are achieved, the fault risk caused by the temperature and humidity problem of the photovoltaic field high-voltage switch cabinet is effectively solved, and safe and stable operation of an electric power system is guaranteed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of switch cabinet equipment, and particularly relates to a photovoltaic field intelligent dehumidification and cooling high-voltage switch cabinet. BACKGROUND

[0002] With the growth of clean energy demand, the coastal beach becomes a popular site for photovoltaic fields due to its open terrain and sufficient sunlight. However, the complex environment in this area poses severe challenges to the operation of high-voltage switch cabinets. On the one hand, the air humidity in the coastal beach area is high throughout the year, and the day-night temperature difference is significant. At night, the hot air in the high-voltage switch cabinet encounters cold, which easily forms condensation inside the cabinet. More troublesome is that the salt mist rich in the coastal environment will dissolve in the condensation to form a corrosive electrolyte solution attached to the surface of the insulating material. This not only greatly reduces the resistivity of the insulating material, leading to a significant decrease in insulation performance and greatly increasing the risk of insulation breakdown, short circuit, and other faults, but also accelerates the corrosion process of the cabinet and internal electrical components, seriously threatening the safe and stable operation of the power system. Once a fault occurs, not only will it cause power interruption and affect the normal output of photovoltaic power generation, but it may also trigger a series of secondary disasters, causing incalculable losses.

[0003] On the other hand, during the day, the strong sunlight and the heat generated by the operation of electrical equipment inside the cabinet are superimposed, causing the temperature inside the cabinet to rise sharply. The high-temperature environment not only accelerates the aging process of electrical components, reducing their performance and reliability, but also may cause the control and protection system to malfunction. At the same time, salt mist can further accelerate the corrosion of metal parts of the equipment at high temperatures, further shortening the service life of the equipment.

[0004] Current traditional dehumidification and cooling technologies cannot meet the demand. The heater dehumidification consumes high energy and is not precise in humidity control, and the moisture is easy to condense when the heating stops. Natural ventilation is affected by terrain and air flow, and the cooling effect is poor. Moreover, existing technologies are independent of each other, lack intelligent coordination and dynamic optimization, and cannot cope with the problem of salt mist corrosion. Therefore, it is urgent to develop a photovoltaic field intelligent dehumidification and cooling high-voltage switch cabinet with intelligent sensing, precise control, and high energy efficiency. SUMMARY

[0005] In view of the problems and deficiencies of the prior art, the present application provides a photovoltaic field intelligent dehumidification and cooling high-voltage switch cabinet, which realizes precise dehumidification and cooling control by real-time monitoring of the environmental data inside the cabinet through an intelligent environmental sensing device and combining multiple operating modes of a composite dehumidification and cooling device, solves the fault risk of photovoltaic field high-voltage switch cabinets caused by temperature and humidity problems, and ensures the safe and stable operation of the power system.

[0006] The present application is achieved by the following technical solutions: The utility model provides a photovoltaic field intelligence dehumidification and cooling high voltage switch cabinet, including cabinet, intelligence environmental perception device and composite dehumidification and cooling device.

[0007] The composite dehumidification and cooling device is connected with the controller and includes a coarse filter, a first air inlet fan, a primary dehumidification runner, a fine filter, a second air inlet fan, a senior dehumidification runner, a main heater, a first air outlet fan, an auxiliary heater, and a second air outlet fan arranged along the extension direction of the air flow pipeline. The primary dehumidification runner and the senior dehumidification runner each include a dehumidification zone and a regeneration zone. The regeneration zone of the senior dehumidification runner includes a transition zone and a main regeneration zone. The cabinet and the dehumidification zone of the primary dehumidification runner are each connected with the first air inlet fan via an air flow pipeline, and a first electromagnetic valve for controlling the air flow direction is installed at the air outlet of the first air inlet fan.

[0008] Further, the composite dehumidification and cooling device has a first cooling state and a first dehumidification state, When in the first cooling state, the first electromagnetic valve controls the air flow in the first air inlet fan to flow to the cabinet, and the external air is filtered by the coarse filter and then sent into the cabinet by the first air inlet fan. This realizes the functions of natural ventilation cooling and preliminary dehumidification and regeneration. In the case of relatively low temperature and low humidity, the first cooling state can be used to reduce the temperature in the cabinet by natural ventilation, without the need for additional cooling equipment, thereby saving energy.

[0009] When in the first dehumidifying state, the first electromagnetic valve controls the air flow in the first air inlet fan to flow to the primary dehumidifying runner, the external air is filtered by the coarse filter and then is blown by the first air inlet fan to the dehumidifying area of the primary dehumidifying runner, the air after the primary dehumidification flows through the fine filter together with the air in the cabinet and is blown by the second air inlet fan to the dehumidifying area and the transition area of the advanced dehumidifying runner, the air flowing through the dehumidifying area flows into the cabinet for dehumidification, the air flowing through the transition area is heated by the main heater and then flows back to the main regeneration area of the advanced dehumidifying runner, the air preliminarily humidified is separated from the main regeneration area under the driving of the first air outlet fan, is heated by the auxiliary heater and then flows to the regeneration area of the primary dehumidifying runner, and the second air outlet fan discharges the humid air in the regeneration area of the primary dehumidifying runner to the outside. When the humidity is high, the primary dehumidification is performed by the primary dehumidifying runner in the first dehumidifying state, and then the advanced dehumidifying runner is used for deep dehumidification, the air flowing out of the advanced dehumidifying runner is mixed with the air in the cabinet, the mixed air in the cabinet flows back to the fine filter and then flows through the advanced dehumidifying runner again. The humidity of the air in the cabinet is lower than that of the external air, and the air in the cabinet flowing back to the advanced dehumidifying runner helps to save the energy consumption of the whole composite dehumidifying and cooling device. The volume of the dry air flowing into the cabinet from the advanced dehumidifying runner is greater than that of the air in the cabinet flowing back to the advanced dehumidifying runner, and the air in the cabinet has a surplus for dispersion to the outside, so that the air humidity in the cabinet is sufficiently reduced.

[0010] Further, the composite dehumidifying and cooling device further comprises a surface cooler, the surface cooler is installed between the coarse filter and the first air inlet fan, the surface cooler and the first air inlet fan are both provided with an air flow pipeline between the coarse filter, and the second electromagnetic valve for controlling the air flow direction is installed at the air outlet of the coarse filter, the composite dehumidifying and cooling device further has a second cooling state and a second dehumidifying state, when in the second cooling state, the second electromagnetic valve controls the coarse filter to communicate with the surface cooler, the first electromagnetic valve controls the air flow in the first air inlet fan to flow to the cabinet, the external air is filtered by the coarse filter and then flows into the surface cooler, and the cooled air is sent by the first air inlet fan into the cabinet; When in the second dehumidifying state, the second electromagnetic valve controls the coarse filter to communicate with the surface cooler, the first electromagnetic valve controls the air flow in the first air inlet fan to flow to the primary dehumidifying runner, the external air is filtered by the coarse filter and then flows into the surface cooler, the cooled air is blown by the first air inlet fan to the dehumidifying area of the primary dehumidifying runner, the air after the primary dehumidification flows through the fine filter together with the air in the cabinet and is blown by the second air inlet fan to the dehumidifying area and the transition area of the advanced dehumidifying runner, the air flowing through the dehumidifying area flows into the cabinet for dehumidification, the air flowing through the transition area is heated by the main heater and then flows back to the main regeneration area of the advanced dehumidifying runner, the air preliminarily humidified is separated from the main regeneration area under the driving of the first air outlet fan, is heated by the auxiliary heater and then flows to the regeneration area of the primary dehumidifying runner, and the second air outlet fan discharges the humid air in the regeneration area of the primary dehumidifying runner to the outside.

[0011] The addition of the surface cooler and the setting of the second cooling state and the second dehumidifying state further enrich the dehumidifying and cooling modes. In a high-temperature environment, the second cooling state can quickly reduce the temperature in the cabinet by sending the air cooled by the surface cooler into the cabinet, and the cooling effect is remarkable. The second dehumidifying state realizes cooling and dehumidifying regeneration, dehumidifying while reducing temperature, which can better cope with the complex environment of high temperature and high humidity compared with single dehumidifying or cooling mode, and improves the adaptability of the high-voltage switch cabinet in harsh environments.

[0012] Further, the primary dehumidifying runner and the senior dehumidifying runner each include a runner body, two support leg plates supporting a rotation shaft of the runner body, and a speed regulation motor connected with the runner body through a belt; The surface of the runner body is attached with an elastic moisture absorbing material, the two support leg plates are vertically arranged and symmetric to a vertical central axis of the runner body, the two support leg plates separate the runner body into a dehumidifying area and a regeneration area, and the area of the dehumidifying area is 3:1 of the area of the regeneration area. The structure design of the primary dehumidifying runner and the senior dehumidifying runner, the surface of the runner body attached with the elastic moisture absorbing material, can efficiently absorb moisture in the air. The two support leg plates separate the runner body into the dehumidifying area and the regeneration area with a specific ratio, so that the dehumidifying and regeneration processes can be orderly carried out, and the dehumidifying efficiency is improved. The speed regulation motor can adjust the rotation speed of the runner according to the actual dehumidifying demand, to realize precise dehumidifying control.

[0013] Further, the primary dehumidifying runner and the senior dehumidifying runner each further include a water extractor and a water content detector, when the water content detector detects that the water content of the runner body exceeds a set threshold, the water extractor extrudes the runner body to squeeze out the contained moisture. The setting of the water extractor and the water content detector can monitor the water content of the runner body in real time, and when the water content exceeds the set threshold, the water extractor can timely squeeze out the moisture, to ensure the dehumidifying performance of the runner, avoid the dehumidifying effect being reduced due to excessive wetting of the runner, and prolong the service life of the dehumidifying runner. It should be noted that the water extractor is used for indoor high-temperature environment, and is used to remove water from the runner body when the main heater and the auxiliary heater are disabled.

[0014] Further, the water extractor is installed to the support leg plate and located at one side of the runner body, the water extractor includes two electric push rods, a buffer block installed to the end of the electric push rod, and a press roller connected with the two buffer blocks, and the electric push rod drives the press roller to extrude to the runner body through the buffer block. The water extractor adopts the structure of the electric push rod, the buffer block and the press roller, the electric push rod can provide stable extrusion force, the buffer block can avoid excessive damage of the press roller to the runner body, to ensure the reliability and safety of the extrusion process, and effectively improve the extrusion effect.

[0015] Further, a sliding groove is arranged in the buffer block, a bearing sliding seat is installed in the sliding groove, a compression spring is installed between the bearing sliding seat and the inner wall of the sliding groove, the compression spring has an elastic extrusion force on the bearing sliding seat towards the runner body, and the compression roller is installed on the bearing sliding seat. The compression spring and the bearing sliding seat in the buffer block are designed so that the compression roller can adaptively adjust the extrusion degree according to the shape and surface condition of the runner body, ensure the close contact between the compression roller and the runner body, further improve the water squeezing efficiency, and reduce the wear of the runner body.

[0016] Further, the outer diameter of the compression roller gradually increases from the center of the runner body to the edge of the runner body, and in a plane perpendicular to the runner body, the edge close to the runner body is parallel to the surface of the runner body. The gradually increasing outer diameter of the compression roller from the center of the runner body to the edge and the specific parallel arrangement enable the compression roller to apply uniform pressure to different positions when extruding the runner body, ensure that the moisture in each part of the runner body can be effectively squeezed out, and improve the uniformity and completeness of the water squeezing. At the same time, the structure of the compression roller can adapt to the speed change of the runner body to the outside, reducing the sliding friction between the compression roller and the runner body.

[0017] Further, the moisture detector is a water content detection sensor installed on the runner body or a weight sensor installed on the support leg plate. The moisture detector can select a water content detection sensor or a weight sensor to provide multiple reliable ways to monitor the water content of the runner body, accurately determine the wetness of the runner, and trigger the water extractor to work in time, ensuring the stable operation of the dehumidification system.

[0018] Further, the intelligent environment sensing device further comprises a fault diagnosis and emergency treatment module connected with the controller. The module predicts equipment failure through machine learning algorithm based on historical data and real-time monitoring data, and automatically adjusts the operation mode of the dehumidification and cooling system when detecting an abnormality, and sends a fault warning information to the power supply monitoring system. The addition of the fault diagnosis and emergency treatment module can predict equipment failure through machine learning algorithm based on historical data and real-time monitoring data, so as to discover potential problems in advance. When an abnormality is detected, the operation mode of the dehumidification and cooling system is automatically adjusted to avoid the occurrence or expansion of the fault, and a fault warning information is sent to the power supply monitoring system, so that the staff can take measures in time, and the safety and reliability of the high-voltage switch cabinet operation are improved. The beneficial effects of the present application are: The present application deeply integrates intelligent environment sensing, composite dehumidification and cooling, and fault diagnosis module to build a comprehensive high-voltage switch cabinet operation guarantee system. The composite dehumidification and cooling device as the core functional module significantly improves the ability of the equipment to cope with complex environments through innovative structural design and multiple operation modes.

[0019] At the structural level, the combined dehumidification and cooling device adopts multi-stage filtration and double dehumidification rotary wheel collaborative design. The coarse filter and the fine filter form double protection, effectively intercepting dust and impurities from the outside, preventing them from entering the cabinet and affecting the dehumidification effect and equipment operation; the primary dehumidification rotary wheel and the senior dehumidification rotary wheel work in cooperation, the primary rotary wheel completes the preliminary dehumidification, and the senior rotary wheel performs deep processing, the dehumidification zones of the two are scientifically divided, and the main heater and the auxiliary heater are matched to form an efficient dehumidification and regeneration cycle path. Compared with traditional single dehumidification equipment, the dehumidification efficiency is greatly improved, which can quickly reduce the humidity in the cabinet and ensure the stable operation of the equipment in a high-humidity environment.

[0020] In terms of operation mode, the device has flexible and diverse options. In the first cooling state, natural ventilation principle is used, and when the environmental conditions are suitable, air circulation and cooling of the cabinet can be achieved without additional energy consumption; the first dehumidification state realizes preliminary dehumidification through the primary dehumidification rotary wheel, combined with the heating regeneration system to ensure the continuous and stable dehumidification process; the second cooling state introduces an air cooler to cool and cool the air in high temperature, quickly reducing the temperature in the cabinet; the second dehumidification state realizes the dual function of cooling and dehumidification, and can cope with extreme environments with high temperature and high humidity. Multiple modes can be intelligently switched according to actual environmental needs to accurately control the temperature and humidity in the cabinet. Compared with traditional fixed-mode dehumidification equipment, it has stronger adaptability and effectively solves the problem of large diurnal temperature difference and complex temperature and humidity changes in photovoltaic fields.

[0021] In addition, the combined dehumidification and cooling device performs well in energy saving and functional synergy. By optimizing the layout of the air flow pipeline and the fan control logic, the energy consumption is reduced; the intelligent environment sensing device monitors environmental data in real time and feeds back the information to the controller, which accurately adjusts the operating parameters and modes of the dehumidification and cooling device to realize efficient collaborative operation of each component. At the same time, the water extractor and the water detector cooperate with the dehumidification rotary wheel to ensure that the rotary wheel is always in good moisture absorption state when the main heater and auxiliary heater are not in use, maintaining the long-term stable operation of the dehumidification system, prolonging the service life of the equipment and reducing the maintenance cost.

[0022] Overall, the combined dehumidification and cooling device of the present application realizes efficient energy saving and stable operation through structural innovation, mode optimization and intelligent synergy, and makes a significant breakthrough in performance, energy consumption and reliability compared with traditional technology, providing a solid technical guarantee for the stable transmission of photovoltaic energy. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A structural schematic diagram illustrating an exemplary embodiment of an intelligent dehumidification and cooling high-voltage switch cabinet for a photovoltaic field according to the present application; Figure 2A schematic structural block diagram for illustrating the principle of one illustrative embodiment of a photovoltaic field intelligent dehumidification and cooling high-voltage switch cabinet in the present application; Figure 3 A structural schematic diagram for illustrating one illustrative embodiment of a sectioned state of an advanced dehumidification runner in the present application; Figure 4 A structural schematic diagram for illustrating another illustrative embodiment of a sectioned state of an advanced dehumidification runner in the present application; Figure 5 A structural schematic diagram for illustrating Figure 4 A partial enlarged schematic diagram at A in the present application; Figure 6 A side view for illustrating one illustrative embodiment of a sectioned state of an advanced dehumidification runner in the present application; Figure 7 A structural schematic diagram for illustrating Figure 6 A partial enlarged schematic diagram at B in the present application.

[0024] List of components and reference numerals: 0, cabinet body; 01, intelligent environment sensing device; 02, composite dehumidification and cooling device; 1, coarse filter; 11, surface cooler; 12, second electromagnetic valve; 2, first air inlet fan; 21, first electromagnetic valve; 3, primary dehumidification runner; 4, fine filter; 5, second air inlet fan; 6, advanced dehumidification runner; 61, dehumidification zone; 62, regeneration zone; 621, transition zone; 622, main regeneration zone; 63, runner body; 64, support leg plate; 65, belt; 66, speed regulation motor; 67, wringer; 671, electric push rod; 672, buffer block; 6721, sliding groove; 673, press roller; 674, bearing slide; 675, compression spring; 7, main heater; 8, first air outlet fan; 9, auxiliary heater; 10, second air outlet fan. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0026] It should be noted that the left, right, up, down, front, back and other orientation terms in the embodiments of the present application are only relative concepts or are referenced to the normal use state of the product, i.e., the running direction of the product, and should not be considered as limiting.

[0027] In addition, it should be noted that the dynamic terms such as "relative motion" mentioned in the embodiments of the present invention refer not only to changes in position, but also to movements such as rotation and rolling in which the position does not change relative to the position, but the state changes.

[0028] Finally, it should be noted that when a component is said to be "located on" or "set on" another component, it can be on the other component or may have an intervening component at the same time. When a component is said to be "connected to" another component, it can be directly connected to the other component or may have an intervening component at the same time.

[0029] In existing technologies, high-voltage switchgear, as a key piece of equipment in photovoltaic power systems, has long faced problems such as moisture caused by coastal mudflat environments and accelerated component aging due to high temperatures. Traditional technologies use heaters to dissipate moisture or rely on natural ventilation, which suffers from drawbacks such as high energy consumption, inaccurate humidity control, and poor ventilation. They also cannot achieve coordinated control of dehumidification and cooling, leading to a decline in equipment insulation performance and reduced operational reliability.

[0030] To address the aforementioned issues, the inventors, recognizing the limitations of existing technologies in dynamically adapting to environmental changes and lacking multi-level processing capabilities, proposed constructing a closed-loop control system using an intelligent environmental sensing device and a composite dehumidification and cooling device. First, a multi-dimensional intelligent environmental sensing device is established to collect real-time data on temperature, humidity, light intensity, and air pressure, providing a basis for system regulation decisions. Second, primary and advanced dehumidification impellers are designed, incorporating coarse and fine filters and dehumidification spaces with different functions along the airflow path to achieve tiered optimization of the air handling process. Finally, by controlling the airflow direction, the system can autonomously select its operating mode based on environmental conditions.

[0031] like Figures 1 to 7 The photovoltaic field intelligent dehumidification and cooling high-voltage switchgear shown includes: cabinet 0, intelligent environmental sensing device 01 and composite dehumidification and cooling device 02. The intelligent environmental sensing device 01 is installed in the cabinet 0, including a controller and temperature sensors, humidity sensors, light intensity sensors and air pressure sensors connected to the controller; the composite dehumidification and cooling device 02 is connected to the controller and includes a coarse filter 1, a first air intake fan 2, the intelligent environmental sensing device 01, a fine filter 4, a second air intake fan 5, an advanced dehumidification impeller 6, a main heater 7, a first air outlet fan 8, an auxiliary heater 9 and a second air outlet fan 10 arranged along the airflow duct. The primary dehumidification impeller 3 and the advanced dehumidification impeller 6 both include a dehumidification zone 61 and a regeneration zone 62, and the regeneration zone 62 of the advanced dehumidification impeller 6 includes a transition zone 621 and a main regeneration zone 622. The cabinet 0 and the dehumidification zone 61 of the primary dehumidification impeller 3 are provided with airflow ducts between them and the first air intake fan 2, and a first solenoid valve 21 for controlling the airflow direction is installed at the air outlet of the first air intake fan 2.

[0032] Wherein, the coarse filter 1 refers to an air pretreatment assembly for intercepting large particle pollutants, which can be implemented by a metal mesh or a polyester fiber filter element, and is arranged at the front end of the airflow path to protect the subsequent equipment. The primary dehumidification runner 3 refers to a rotating dehumidification unit with a moisture-absorbing material coating, which can be implemented by a silica gel or molecular sieve coating runner to reduce air humidity through physical adsorption. The transition zone 621 of the regeneration zone 62 of the advanced dehumidification runner 6 refers to a buffer area connecting the dehumidification zone 61 and the main regeneration zone 622, which can be implemented by designing the partition angle of the runner to buffer the temperature difference between the main regeneration zone 622 and the dehumidification zone 61 of the runner body 63. The first electromagnetic valve 21 refers to a double-flow pneumatic valve, which can be implemented by an electromagnetic butterfly valve, and switches the path of the air flow into the cabinet 0 or the primary dehumidification runner 3 according to the controller instruction.

[0033] Specifically, when the environmental humidity exceeds the threshold value, the controller starts the dehumidification mode: the first electromagnetic valve 21 guides the air flow into the primary dehumidification runner 3, and the external air is sent into the dehumidification zone 61 of the runner after passing through the coarse filter 1 to complete the preliminary dehumidification; the processed air is mixed with the air returned from the cabinet 0, and then enters the second air inlet fan 5 through the fine filter 4, and is transported to the dehumidification zone 61 and the transition zone 621 of the advanced dehumidification runner 6. The dry air flowing through the dehumidification zone 61 returns to the cabinet 0 to maintain a low-humidity environment, and the air in the transition zone 621 is heated by the main heater 7 and then enters the main regeneration zone 622, carrying away the water absorbed by the runner; the humid air is heated again by the auxiliary heater 9 and then enters the regeneration zone 62 of the primary dehumidification runner 3, and finally is discharged by the second air outlet fan 10. In this process, the multi-stage runner and the heater form a regeneration heat cycle to realize efficient reuse of the dehumidification material.

[0034] Compared with the prior art, the traditional scheme uses single heating and dehumidification, and the moisture is easy to condense again after stopping heating, while the present scheme can continuously maintain a low-humidity environment through physical adsorption of the runner combined with a regeneration heat cycle; the existing natural ventilation is limited by the air flowability of the coastal beach, and the present scheme ensures stable delivery of the processed dry air through the two-stage air inlet fan to force air circulation; the existing technology lacks grading processing capability, and the present scheme significantly improves air purification efficiency through the serial connection of the coarse filter 1, the fine filter 4, the primary dehumidification runner 3, and the advanced dehumidification runner 6.

[0035] Through the above technical solutions, the present application can dynamically perceive environmental parameters and automatically switch operation modes to realize accurate control of the temperature and humidity in the cabinet under high temperature and high humidity conditions, effectively preventing condensation and overheating of components; the multi-stage filtering and runner dehumidification structure reduces the load pressure of a single device, prolonging the service life of key components; the regeneration heat cycle design reduces external energy consumption and improves the overall energy efficiency of the system.

[0036] Preferably, the composite dehumidification and cooling device 02 has a first cooling state and a first dehumidification state. When in the first cooling state, the first electromagnetic valve 21 controls the airflow direction in the first air inlet fan 2, and the ambient air filtered by the coarse filter 1 is sent into the cabinet 0 by the first air inlet fan 2. When in the first dehumidification state, the first electromagnetic valve 21 controls the airflow direction in the first air inlet fan 2, and the ambient air filtered by the coarse filter 1 is blown to the dehumidification area 61 of the primary dehumidification runner 3 by the first air inlet fan 2. The air after preliminary dehumidification flows through the fine filter 4 together with the air in the cabinet 0, and is blown to the dehumidification area 61 and the transition area 621 of the senior dehumidification runner 6 by the second air inlet fan 5. The air flowing through the dehumidification area 61 flows into the interior of the cabinet 0 for dehumidification, and the air flowing through the transition area 621 is heated by the main heater 7 and then flows back to the main regeneration area 622 of the senior dehumidification runner 6. The preliminary humidified air is driven out of the main regeneration area 622 by the first air outlet fan 8, heated by the auxiliary heater 9, and then flows to the regeneration area 62 of the primary dehumidification runner 3. The humidified air in the regeneration area 62 of the primary dehumidification runner 3 is discharged to the outside by the second air outlet fan 10.

[0037] The first cooling state refers to an operation mode of rapidly cooling the cabinet 0 by directly introducing filtered ambient air. Specifically, the first electromagnetic valve 21 can be used to switch the airflow path. This mode is suitable for conditions with low humidity but high temperature. The first dehumidification state refers to an operation mode of deep dehumidification through multi-stage runner cooperative processing. Specifically, the primary dehumidification runner 3 and the senior dehumidification runner 6 can be used to realize the partition processing structure. The mode improves the desorption efficiency of the runner moisture absorption material through the hot air circulation of the regeneration area 62. The transition area 621 is an area between the dehumidification area 61 and the main regeneration area 622 of the senior dehumidification runner 6 for buffering the temperature difference. It needs to be noted that when the runner body 63 rotates, the air in the main regeneration area 622 after heating has a high baking temperature, while the air flowing through the dehumidification area 61 has a low temperature. Therefore, the transition area 621 is provided between the main regeneration area 622 and the dehumidification area 61 to buffer the temperature difference. The main regeneration area 622 is the core area of the regeneration area 62 of the senior dehumidification runner 6 for completing the water desorption of the moisture absorption material. Specifically, a directional hot air circulation system can be used to realize this area. The area ensures the regeneration efficiency of the moisture absorption material through accurate temperature control.

[0038] Specifically, when the ambient humidity is lower than the set threshold but the temperature is too high, the device automatically switches to the first cooling state. After the particulate matter in the external air is removed by the coarse filter 1, the air is directly sent into the cabinet 0 through the first air inlet fan 2 to achieve rapid cooling. When the humidity exceeds the threshold, the device switches to the first dehumidification state. After the external air is preliminarily dehumidified by the primary dehumidification runner 3, it is mixed with the circulating air in the cabinet 0 and enters the fine filter 4 for secondary purification, and then is pushed by the second air inlet fan 5 to the advanced dehumidification runner 6 for deep dehumidification. The dry air after deep processing returns to the cabinet 0 to maintain a low-humidity environment, and the moisture-carrying regeneration air is heated by the main heater 7, then sequentially passes through the advanced runner main regeneration area 622 to complete the desorption regeneration, and then is heated again by the auxiliary heater 9 to act on the regeneration area 62 of the primary dehumidification runner 3, and finally the high-humidity waste gas is discharged by the second air outlet fan 10.

[0039] Compared with the prior art, the traditional scheme adopts a single dehumidification or cooling mode, which cannot dynamically switch the operating state according to environmental parameters, resulting in high energy consumption and insufficient temperature and humidity control precision. The present scheme can ensure dehumidification efficiency while avoiding unnecessary energy consumption through a dual-state intelligent switching mechanism. The setting of the transition area 621 causes the temperature of the regeneration air flow to rise gently, which can reduce the thermal fatigue loss of the runner material compared with the direct high-temperature desorption method in the prior art.

[0040] Through the above technical scheme, the present application can achieve precise regulation of the temperature and humidity in the cabinet in the coastal beach environment with large diurnal temperature difference and severe humidity fluctuations. The state switching mechanism avoids the problem of mutual interference between dehumidification and cooling functions in traditional technology. In high-temperature and low-humidity conditions, fresh air is directly introduced for cooling, and in high-humidity conditions, the primary dehumidification runner 3 and the advanced dehumidification runner 6 are started for cooperative dehumidification, effectively preventing condensation formation and component overheating. At the same time, the regeneration hot air is recycled to reduce energy waste. The air flow rate into the cabinet 0 is greater than the air flow rate of the air flow from the cabinet 0 back to the advanced dehumidification runner 6, and the air in the cabinet 0 has a certain amount of leakage, effectively preventing the direct flow of external air into the cabinet 0.

[0041] Preferably, the composite dehumidification and cooling device 02 further comprises a surface cooler 11 installed between the coarse filter 1 and the first air inlet fan 2. The surface cooler 11 and the first air inlet fan 2 are both provided with air flow ducts between them and the coarse filter 1. A second electromagnetic valve 12 for controlling the direction of air flow is installed at the air outlet of the coarse filter 1. The composite dehumidification and cooling device 02 further has a second cooling state and a second dehumidification state. When in the second cooling state, the second electromagnetic valve 12 controls the coarse filter 1 to communicate with the surface cooler 11, and the first electromagnetic valve 21 controls the air flow in the first air inlet fan 2 to flow into the cabinet 0. After being filtered by the coarse filter 1, the external air flows into the surface cooler 11, and the cooled air is sent into the cabinet 0 by the first air inlet fan 2. When in the second dehumidifying state, the second electromagnetic valve 12 controls the coarse filter 1 to communicate with the surface cooler 11, and the first electromagnetic valve 21 controls the air flow direction in the first air inlet fan 2. The outside air filtered by the coarse filter 1 flows into the surface cooler 11, and the cooled air is blown by the first air inlet fan 2 to the dehumidifying area 61 of the primary dehumidifying runner 3. The air preliminarily dehumidified flows through the fine filter 4 together with the air in the cabinet 0, and is blown by the second air inlet fan 5 to the dehumidifying area 61 and the transition area 621 of the advanced dehumidifying runner 6. The air flowing through the dehumidifying area 61 flows into the cabinet 0 for dehumidification, and the air flowing through the transition area 621 is heated by the main heater 7 and then flows back to the main regenerating area 622 of the advanced dehumidifying runner 6. The preliminarily humidified air is separated from the main regenerating area 622 under the driving of the first air outlet fan 8, heated by the auxiliary heater 9, and then flows to the regenerating area 62 of the primary dehumidifying runner 3. The humidified air in the regenerating area 62 of the primary dehumidifying runner 3 is discharged to the outside by the second air outlet fan 10.

[0042] The surface cooler 11 is a heat exchange device for pre-cooling air, which can be implemented by a finned heat exchanger, and refrigerant or cooling water is introduced into the inside to reduce the temperature of the air. The second electromagnetic valve 12 is a valve for switching the air flow path, which can be implemented by an electric butterfly valve, and its opening and closing state is adjusted by the controller to select whether to enable the surface cooler 11. The second cooling state is an operation mode of directly supplying air to the cabinet 0 after pre-cooling the air by the surface cooler 11. The second dehumidifying state is an operation mode of combining the pre-cooled air with the dehumidifying runner for deep dehumidification.

[0043] Specifically, in the second cooling state, the outside air removes large particle impurities after passing through the coarse filter 1, and is guided by the second electromagnetic valve 12 to the surface cooler 11 for cooling treatment. The cooled air is directly supplied into the cabinet 0 by the first air inlet fan 2 to rapidly reduce the temperature in the cabinet. In the second dehumidifying state, the air pre-cooled by the surface cooler 11 enters the primary dehumidifying runner 3 for preliminary dehumidification, and then mixes with the air flowing back from the cabinet 0 to enter the fine filter 4, and then realizes secondary dehumidification by the advanced dehumidifying runner 6. At the same time, the regenerating area 62 forms a hot air circulation through the main heater 7 and the auxiliary heater 9, so as to desorb the water adsorbed by the runner and discharge it.

[0044] Compared with the prior art, the prior art only uses heating or natural ventilation to process the temperature and humidity in the cabinet, which cannot effectively reduce the temperature in the high temperature environment, and the dehumidification process consumes high energy. The present scheme cooperatively controls the surface cooler 11, the first electromagnetic valve 21 and the second electromagnetic valve 12 to preferentially pre-cool the air in the high temperature condition, which not only reduces the load of the subsequent dehumidifying runner, but also reduces the energy consumption of the main heater 7. At the same time, the switching of the two operation states realizes the flexible combination of cooling and dehumidification.

[0045] By the above technical solutions, the application can reduce the internal temperature peak of the cabinet body in the photovoltaic field under the environment of large diurnal temperature difference and strong light, avoid the accelerated aging of electrical components due to overheating, and reduce the risk of condensation by combining the primary dehumidification runner 3 and the advanced dehumidification runner 6, thereby improving the operation stability and energy efficiency ratio of the high-voltage switch cabinet under complex climate conditions.

[0046] Preferably, the primary dehumidification runner 3 and the advanced dehumidification runner 6 each include a runner body 63, two support leg plates 64 supporting a rotation shaft of the runner body 63, and a speed regulation motor 66 connected to the runner body 63 through a belt 65. The surface of the runner body 63 is attached with an elastic moisture-absorbing material, the support leg plates 64 and the runner body 63 have a moving gap therebetween, the two support leg plates 64 are vertically arranged and symmetric to a vertical central axis of the runner body 63, the two support leg plates 64 separate the runner body 63 to form a dehumidification zone 61 and a regeneration zone 62, and the area of the dehumidification zone 61 is 3:1 of the area of the regeneration zone 62.

[0047] The runner body 63 is a rotating component carrying the moisture-absorbing material, which can be implemented by coating silica gel or molecular sieve material on the surface of a honeycomb-shaped metal framework, and the runner body 63 realizes periodic switching of the dehumidification zone 61 and the regeneration zone 62 by rotation. The support leg plates 64 are support structures fixing the rotation shaft of the runner body 63, which can be implemented by a steel plate assembly with sliding bearings, and the vertical symmetry layout enhances the structural stability during rotation of the runner. The speed regulation motor 66 is a power device adjusting the rotation speed of the runner, which can be implemented by a variable frequency motor cooperating with a belt 65 transmission mechanism, and the rotation speed is changed to match the dehumidification demand under different humidity conditions. The elastic moisture-absorbing material is a moisture-absorbing coating with deformation recovery ability, which can be implemented by a porous silica gel and an elastic polymer composite layer, and the porous structure is maintained to maintain the moisture-absorbing efficiency after being compressed. The moving gap is a reserved space between the support leg plates 64 and the runner body 63, which can be implemented by adjusting the gasket at the installation position of the rotation shaft, and is used to compensate for the size change caused by thermal expansion or mechanical vibration of the runner.

[0048] Specifically, the rotating body 63 is vertically symmetrical fixed by the support leg plate 64, so that the stress is uniform during rotation, avoiding mechanical wear caused by eccentricity. The elastic moisture-absorbing material forms a continuous adsorption layer on the surface of the rotating body, when the rotating body rotates, the dehumidification area 61 contacts the humid air for moisture absorption, and the regeneration area 62 desorbs water through hot air. The speed regulation motor 66 dynamically adjusts the rotating speed of the rotating body 63 according to the feedback of the humidity sensor, for example, the rotating speed is reduced when the humidity is high to prolong the moisture absorption time. The two support leg plates 64 divide the rotating body 63 into a dehumidification area 6161 and a regeneration area 6262 with an area ratio of 3:1, ensuring that most of the area is used for moisture absorption, while reserving enough regeneration area 62 to achieve efficient water desorption. The moving gap allows the rotating body to freely expand and contract when the temperature changes, avoiding structural deformation caused by thermal expansion and cold contraction.

[0049] Compared with the prior art, the traditional dehumidification rotating body usually adopts a single-side support structure, which is prone to eccentric vibration when the rotating body rotates, resulting in bearing wear and moisture-absorbing material falling off. The vertical symmetrical support leg plate 64 and the moving gap design significantly improve the mechanical stability. In addition, the area ratio of the dehumidification area 61 to the regeneration area 62 in the prior art is usually 2:1, and when the regeneration efficiency is insufficient, the moisture-absorbing material is easily saturated. The 3:1 ratio optimization in this scheme ensures moisture absorption efficiency while improving regeneration speed and avoiding material performance degradation.

[0050] In an embodiment, when the internal temperature of the cabinet 0 is too high, the main heater 7 and the auxiliary heater 9 are disabled, and the rotating speed of the speed regulation motor 66 can be increased to increase the rotating speed of the rotating body 63, so as to throw out the water attached to the rotating body 63, avoiding excessive water content in the rotating body 63 and thus unable to absorb water.

[0051] Through the above technical scheme, the mechanical failure problem caused by unstable structure of the traditional dehumidification rotating body is solved, so that the rotating body 63 can still maintain high dehumidification capacity in high temperature and high humidity environment, prolonging the service life of the equipment. The application of elastic moisture-absorbing material further enhances the performance retention ability of the rotating body 63 after repeated extrusion and deformation, adapting to the working condition requirements of large diurnal temperature difference and frequent humidity fluctuations in photovoltaic fields.

[0052] Preferably, the primary dehumidification rotating body 3 and the senior dehumidification rotating body 6 each further comprise a water extractor 67 and a water detector, when the water detector detects that the water content of the rotating body 63 exceeds a set threshold, the water extractor 67 extrudes the rotating body 63 to squeeze out the contained water.

[0053] The wringer 67 refers to a device that applies pressure to the runner body 63 by mechanical action to expel moisture, which can be realized by driving the pressure roller 673 to contact the surface of the runner body 63 through the electric push rod 671, and the moisture is separated by extruding the elastic moisture-absorbing material. The moisture detector refers to a sensor for monitoring the moisture absorption state of the runner body 63, which can be realized by using a contact type weight sensor or a non-contact type capacitance moisture content sensor to realize real-time feedback of the moisture absorption saturation of the runner. The set threshold value refers to the critical moisture content value that triggers the wringing operation, which can be determined by experimental test to determine the maximum effective moisture absorption capacity of the runner under different environmental humidity.

[0054] Specifically, when the runner body 63 causes the moisture content to exceed the preset threshold value due to continuous moisture absorption, the moisture detector sends a signal to the controller, and the electric push rod 671 of the wringer 67 drives the pressure roller 673 to press against the surface of the runner body 63. The elastic moisture-absorbing material releases the adsorbed moisture under the action of pressure, and the extruded moisture is discharged to the outside through the flow guide structure. After completing the drainage, the runner restores the moisture absorption function. This process can avoid the decrease of the dehumidification efficiency of the runner due to oversaturation, and reduce the energy consumption of the heating regeneration link.

[0055] Compared with the prior art, the traditional dehumidification runner only relies on the heating regeneration zone 62 to evaporate moisture, which is prone to problems such as decrease of the moisture absorption capacity of the runner body 63 and increase of energy consumption in high-temperature and high-humidity environments, and is prone to cause the temperature in the cabinet 0 to be too high. The present scheme actively detects and cooperates with mechanical extrusion to drain water in time before the runner body 63 is saturated with moisture, maintains its continuous dehumidification capacity, reduces the dependence on the heating regeneration process, and realizes energy saving and efficiency improvement.

[0056] Through the above technical scheme, the present application can effectively prevent the dehumidification performance from being attenuated due to the moisture absorption overload of the runner body 63, prolong the service life of the runner body 63, reduce the energy waste caused by frequent heating regeneration, and avoid the risk of insulation failure caused by repeated condensation of moisture in the cabinet 0.

[0057] Preferably, the wringer 67 is installed to the support leg plate 64 and located on one side of the runner body 63, the wringer 67 includes two electric push rods 671, a buffer block 672 installed to the end of the electric push rod 671, and a pressure roller 673 connected between the two buffer blocks 672, and the electric push rod 671 drives the pressure roller 673 to extrude to the runner body 63 through the buffer block 672.

[0058] The electric push rod 671 refers to a linear actuator driven by electricity, which can be implemented by a servo motor cooperating with a ball screw structure, and is used to provide precise thrust and displacement control. The buffer block 672 refers to a component installed at the end of the electric push rod 671 and having an elastic buffering function, which can be implemented by a metal shell structure with an internal compression spring 675, and is used to absorb the impact force generated during extrusion. The compression roller 673 refers to a cylindrical extrusion component connected between the two buffer blocks 672, which can be implemented by a steel roller body coated with a rubber layer, and is used to uniformly apply pressure and reduce wear on the surface of the rotating wheel.

[0059] Specifically, when the water content of the rotating wheel body 63 exceeds the set threshold value detected by the water detector, the electric push rod 671 starts and pushes the buffer block 672 to move towards the rotating wheel body 63. The compression spring 675 inside the buffer block 672 transmits the pressure to the compression roller 673 through the bearing slide 674, and the compression roller 673 rolls and extrudes along the rotating wheel body 63 in a gradually increasing outer diameter structure, causing the moisture-absorbing material inside the rotating wheel body 63 to deform and expel moisture. In this process, the sliding groove 6721 of the buffer block 672 cooperates with the compression spring 675 to form an adaptive pressure adjustment mechanism, ensuring that the compression roller 673 and the surface of the rotating wheel body 63 remain parallel and avoid local overpressure causing material damage.

[0060] Compared with the prior art, the traditional dehumidification rotating wheel usually needs to be shut down for maintenance or uses a simple scraper for physical water removal after being saturated with moisture. This method is prone to cause wear of the rotating wheel material and has low water removal efficiency. The present scheme realizes continuous extrusion dewatering under dynamic pressure regulation through the cooperation of the electric push rod 671 and the buffer block 672, reduces the frictional resistance between the compression roller 673 and the rotating wheel body 63, and significantly reduces the equipment maintenance frequency while ensuring dehumidification efficiency.

[0061] Through the above technical scheme, the present application can automatically trigger the dewatering operation when the moisture-absorbing material of the rotating wheel body 63 reaches the saturated state, effectively expel the accumulated water through progressive extrusion, restore the moisture-absorbing performance of the material, and avoid the problem of decreased dehumidification efficiency caused by water retention. The combination design of the buffer block 672 and the gradually increasing outer diameter compression roller 673 improves the dewatering effect while ensuring uniform stress on the surface of the rotating wheel body 63, prolonging the service life of the key components.

[0062] Preferably, a sliding groove 6721 is formed in the buffer block 672, a bearing slide 674 is installed in the sliding groove 6721, a compression spring 675 is installed between the bearing slide 674 and the inner wall of the sliding groove 6721, the compression spring 675 has an elastic extrusion force on the bearing slide 674 towards the rotating wheel body 63, and the compression roller 673 is installed on the bearing slide 674.

[0063] The sliding groove 6721 refers to a groove structure arranged inside the buffer block 672, which can be realized by machining or mold forming, and is used to accommodate the bearing sliding seat 674 and limit its movement direction. The bearing sliding seat 674 refers to a sliding component installed in the sliding groove 6721, which can be realized by a metal seat body with a ball bearing, and is used to support the compression roller 673 and allow it to slide in the sliding groove 6721. The compression spring 675 refers to a coil spring or a disc spring, which can be made of stainless steel or carbon steel, and is installed between the inner wall of the sliding groove 6721 and the bearing sliding seat 674 in a pre-compressed state, and is used to provide a continuous elastic force to push the bearing sliding seat 674 to move towards the runner body 63. Specifically, when the electric push rod 671 pushes the buffer block 672 close to the runner body 63, the compression roller 673 slides along the sliding groove 6721 through the bearing sliding seat 674, and the compression spring 675 is compressed and generates a reverse elastic force. The elastic force makes the compression roller 673 maintain flexible contact when contacting the surface of the runner body 63, avoiding rigid impact that damages the hygroscopic material on the surface of the runner body 63. When the runner body 63 deforms due to hygroscopic swelling, the elastic extrusion force of the compression spring 675 can adaptively adjust the contact pressure between the compression roller 673 and the runner body 63, ensuring uniform and stable extrusion action.

[0064] Through the above technical solution, the application solves the problem of uneven contact pressure of the water squeezing device caused by the swelling of the runner body 63 due to moisture absorption, ensures that the hygroscopic material on the surface of the runner is uniformly pressed during the water squeezing process, avoids local damage that affects the dehumidification efficiency, reduces the risk of secondary condensation caused by water residue, and prolongs the service life of the runner.

[0065] Preferably, the outer diameter of the compression roller 673 gradually increases from the center of the runner body 63 to the edge of the runner body 63, and in a plane perpendicular to the runner body 63, one edge of the compression roller 673 close to the runner body 63 is parallel to the surface of the runner body 63.

[0066] The gradually increasing outer diameter of the compression roller 673 refers to the radial dimension of the compression roller 673 showing an increasing trend from the position close to the center of the runner body 63 to the edge position, which can be realized by a conical structure. This design makes the compression roller 673 form a uniform pressure distribution when contacting the runner body 63. The one edge of the compression roller 673 close to the runner body 63 being parallel to the surface of the runner body 63 refers to the working surface of the compression roller 673 maintaining an equidistant contact state with the circumferential surface of the runner body 63, which can be realized by adjusting the included angle between the axis of the compression roller 673 and the axis of the runner body 63. This structure can ensure that the compression roller 673 forms a uniform linear contact area with the surface of the runner body 63.

[0067] Specifically, when the wringer 67 is started, the electric push rod 671 pushes the compression roller 673 to move towards the runner body 63. The parallel edges of the compression roller 673 and the surface of the runner body 63 maintain uniform linear fitting when in contact, avoiding local stress concentration. This extrusion method can effectively remove the moisture in the hygroscopic material of the runner body 63, while reducing mechanical damage to the material structure.

[0068] Through the above technical solutions, the present application can realize uniform dehydration of the hygroscopic material of the runner body 63, avoid material structure damage caused by local excessive extrusion, prolong the service life of the runner body 63, improve the moisture removal efficiency, and ensure the continuous and stable operation of the dehumidification device.

[0069] Preferably, the moisture detector is a water content detection sensor installed on the runner body 63 or a weight sensor installed on the support leg plate 64.

[0070] The water content detection sensor refers to a device for real-time monitoring of the water content on the surface or inside the runner body 63, which can be realized by using a capacitive humidity sensor or a resistance humidity sensor to reflect the water content by detecting the dielectric constant or resistance value change of the runner material. The weight sensor refers to a device for indirectly calculating the water content of the runner body 63 by measuring the load change of the support leg plate 64, which can be realized by using a strain gauge sensor or a piezoelectric sensor to convert the water content by the electric signal change generated by the stress deformation of the support leg plate 64.

[0071] Specifically, when the water content detection sensor is used, the sensor is directly embedded on the surface or inside the runner body 63 to monitor the humidity state of the hygroscopic material in real time, and the wringer 67 is triggered when the detected water content exceeds the set threshold. When the weight sensor is used, the sensor is installed at the connection between the support leg plate 64 and the runner body 63, and the water content of the hygroscopic material is indirectly judged by monitoring the weight change of the runner body 63, and the wringer 67 is started when the weight change amplitude exceeds the preset range. The two detection methods can be used alone or in combination, wherein the weight sensor is suitable for dynamic weighing scene in the rotating process of the runner body 63, and the water content detection sensor is suitable for direct measurement in static or low-speed rotating state.

[0072] In some specific embodiments, the water content detection sensor can be arranged at the junction of the dehumidification zone 61 and the regeneration zone 62 of the runner body 63, for example, a ring array of micro humidity probes covering the circumferential area of the runner. The weight sensor can be integrated at the connecting bearing between the support leg plate 64 and the runner shaft, for example, by embedding a strain gauge to measure the radial load change of the shaft.

[0073] The present application can realize uniform dehydration of the hygroscopic material of the runner body 63, avoid material structure damage caused by local excessive extrusion, prolong the service life of the runner body 63, improve the moisture removal efficiency, and ensure the continuous and stable operation of the dehumidification device.

[0074] Through the above technical solutions, the application can accurately judge the wet saturation state of the rotating body 63, timely trigger the water squeezing operation, ensure that the dehumidifying material is always in the best working humidity range, effectively avoid the problem of dehumidifying efficiency decline and equipment life shortening caused by overloading of the rotating body 63, and reduce energy waste caused by misjudgment.

[0075] Preferably, the intelligent environment sensing device 01 further comprises a fault diagnosis and emergency handling module connected with the controller. Based on historical data and real-time monitoring data, the module predicts equipment failure through machine learning algorithms and automatically adjusts the dehumidifying and cooling system operation mode when detecting abnormalities, while sending fault warning information to the power supply monitoring system.

[0076] Among them, the fault diagnosis and emergency handling module refers to a functional unit that realizes equipment state monitoring and abnormal response through data analysis and algorithms, which can be realized by using an embedded processor combined with a pre-trained model, for real-time evaluation of system operation state and triggering of emergency strategies. The machine learning algorithm refers to a mathematical method for establishing a prediction model through training data, which can be realized by using a neural network or decision tree algorithm, for identifying potential failure modes and generating prediction results. Automatically adjusting the dehumidifying and cooling system operation mode refers to dynamically switching the working state according to the fault prediction results, which can be realized by modifying the electromagnetic valve opening and closing logic or fan speed parameters through the controller, for maintaining the basic functions of the system under abnormal conditions. The fault warning information refers to a communication signal containing abnormal types and risk levels, which can be sent to a remote monitoring terminal through a wireless transmission module, for prompting maintenance personnel to intervene in a timely manner.

[0077] Specifically, the fault diagnosis and emergency handling module constructs a device health state baseline by continuously collecting temperature, humidity, air pressure and equipment operation parameters, combined with historical data. When the real-time monitoring data deviates from the baseline, the machine learning algorithm analyzes the data characteristics and predicts potential failure types, such as rotating wheel jamming or sensor failure. After detecting the abnormality, the controller immediately switches to a backup dehumidifying path or reduces the fan load, while sending warning information containing fault codes and risk levels to the power supply system through the communication module, to avoid power supply interruption caused by equipment downtime.

[0078] Compared with the prior art, the traditional scheme relies on manual inspection or threshold alarm, which cannot predict the equipment degradation trend in advance, and the abnormal handling response is lagging. This scheme realizes early identification of faults through machine learning, and actively adjusts the operation mode before the system performance declines, which not only avoids the risk of sudden shutdown, but also reduces the frequency of manual intervention.

[0079] Through the technical solution, when the dehumidification efficiency of the runner is reduced or the sensor data is abnormal, the application can automatically switch to the redundant working mode and reduce the load to maintain the stable internal environment of the switch cabinet. At the same time, through the early warning information, the operation and maintenance personnel can accurately locate the fault point, and the operation reliability of the high-voltage switch cabinet in the complex coastal environment is significantly improved.

[0080] In an embodiment, intelligent cooling in mild weather: In a certain photovoltaic field located on a coastal beach, in the early morning, the intelligent environment sensing device 01 begins to monitor the environmental data in the high-voltage switch cabinet in real time. The temperature sensor shows that the temperature in the cabinet is 28°C, the humidity sensor detects that the humidity is 55%, the light intensity sensor feedbacks that the external light intensity is at a medium level, and the barometric pressure sensor data is also in the normal range. After analyzing these data, the controller determines that the current environmental humidity is in the normal range, but as the sun rises, the light intensity increases, and the temperature in the cabinet may gradually increase.

[0081] Therefore, the controller controls the composite dehumidification and cooling device 02 to enter the first cooling state. The first electromagnetic valve 21 rapidly acts to control the airflow direction in the first air inlet fan 2 to the cabinet 0. The external air first passes through the coarse filter 1, and the multiple layers of filtering materials in the coarse filter 1 effectively intercept dust, leaf debris and other large particle impurities in the air. The purified air is sent into the cabinet 0 by the first air inlet fan 2 at a stable wind speed.

[0082] As the air continues to circulate, the originally relatively static hot air in the cabinet is gradually replaced. In this process, the temperature sensor in the cabinet continuously monitors the temperature change. After 30 minutes of operation, the temperature in the cabinet drops to 25°C, and in the subsequent time, as the external environment slowly changes, the intelligent environment sensing device 01 continuously monitors the data, and the controller dynamically adjusts the wind speed of the first air inlet fan 2, always stabilizing the temperature in the cabinet within the range suitable for equipment operation. This natural ventilation cooling method does not need to start additional refrigeration equipment, while ensuring the normal operation of the equipment, greatly saving energy.

[0083] In an embodiment, deep dehumidification at high humidity at night: When the night falls, the temperature of another photovoltaic field drops rapidly, and the humidity gradually accumulates on the coastal beach. The intelligent environment sensing device 01 sensitively captures the environmental change, and the humidity sensor shows that the humidity in the cabinet has climbed from 60% to 85% in just two hours, which has seriously threatened the performance of the insulating materials in the high-voltage switch cabinet.

[0084] The controller immediately responds and switches the combined dehumidification and cooling device 02 to the first dehumidification state. The first electromagnetic valve 21 re-adjusts the air flow direction so that the air flow in the first air inlet fan 2 flows to the primary dehumidification runner 3. The external air, under the action of the first air inlet fan 2, first passes through the coarse filter 1 to complete preliminary filtration, and then enters the dehumidification zone 61 of the primary dehumidification runner 3. The elastic moisture-absorbing material attached to the surface of the primary dehumidification runner 3 body, like countless tiny sponges, quickly absorbs the moisture in the air, preliminarily dehumidifying the air.

[0085] The air after preliminary dehumidification is combined with the "relatively" humid air flowing back in the cabinet 0, and flows through the fine filter 4 together to further remove the remaining tiny impurities in the air. Then, under the push of the second air inlet fan 5, the air enters the advanced dehumidification runner 6. The dehumidification zone 61 of the advanced dehumidification runner 6 dehumidifies the air again, ensuring that the air entering the cabinet 0 is significantly reduced in humidity. The air flowing through the transition zone 621 is heated by the main heater 7 and then flows back to the main regeneration zone 622 of the advanced dehumidification runner 6, so that the runner can be regenerated in time during the dehumidification process to restore the moisture absorption capacity.

[0086] In this process, the first air outlet fan 8 takes out the air preliminarily humidified in the main regeneration zone 622, which is further heated by the auxiliary heater 9 and then sent to the regeneration zone 62 of the primary dehumidification runner 3. The second air outlet fan 10 discharges the humid air in the regeneration zone 62 of the primary dehumidification runner 3 to the outside, forming a complete dehumidification and regeneration cycle.

[0087] After several hours of continuous operation, the humidity in the cabinet is significantly reduced to about 30%, and the condensation phenomenon on the surface of the insulating material completely disappears, the resistivity returns to normal level, effectively avoiding the risk of insulation breakdown, short circuit and other faults caused by humidity problems, and ensuring the safe and stable operation of the high-voltage switch cabinet in the night high-humidity environment.

[0088] The above only describes the embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various changes and modifications to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of the claims of the present application.

Claims

1. A high-voltage switchgear for intelligent dehumidification and cooling in photovoltaic fields, characterized in that, include: Cabinet; An intelligent environmental sensing device is installed in a cabinet, including a controller and temperature sensors, humidity sensors, light intensity sensors and air pressure sensors connected to the controller. A composite dehumidification and cooling device, connected to a controller, includes a coarse filter, a first inlet fan, a primary dehumidification impeller, a fine filter, a second inlet fan, a high-grade dehumidification impeller, a main heater, a first outlet fan, an auxiliary heater, and a second outlet fan, all arranged along the airflow duct. Both the primary and high-grade dehumidification impellers include a dehumidification zone and a regeneration zone. The regeneration zone of the high-grade dehumidification impeller includes a transition zone and a main regeneration zone. Airflow ducts are provided between the cabinet and the dehumidification zone of the primary dehumidification impeller and the first inlet fan. A first solenoid valve controlling the airflow direction is installed at the outlet of the first inlet fan.

2. The intelligent dehumidification and cooling high-voltage switchgear for photovoltaic fields according to claim 1, characterized in that, The composite dehumidification and cooling device has a first cooling state and a first dehumidification state. When in the first cooling state, the first solenoid valve controls the airflow in the first air intake fan to flow to the cabinet. Outside air is filtered by a coarse filter and then sent into the cabinet by the first air intake fan. When in the first dehumidification state, the first solenoid valve controls the airflow in the first intake fan to flow to the primary dehumidification impeller. After being filtered by the coarse filter, the outside air is blown by the first intake fan to the dehumidification zone of the primary dehumidification impeller. The air that has undergone preliminary dehumidification flows together with the air inside the cabinet through the fine filter and is blown by the second intake fan to the dehumidification zone and transition zone of the advanced dehumidification impeller. The air flowing through the dehumidification zone flows into the cabinet for dehumidification. The air flowing through the transition zone is heated by the main heater and then flows back to the main regeneration zone of the advanced dehumidification impeller. The preliminarily humidified air leaves the main regeneration zone under the drive of the first exhaust fan, is heated by the auxiliary heater, and flows to the regeneration zone of the primary dehumidification impeller. The second exhaust fan discharges the humidified air from the regeneration zone of the primary dehumidification impeller to the outside.

3. The intelligent dehumidification and cooling high-voltage switchgear for photovoltaic fields according to claim 1, characterized in that, The composite dehumidification and cooling device further includes a surface cooler, which is installed between the coarse filter and the first air inlet fan. Both the surface cooler and the first air inlet fan are connected to the coarse filter via airflow ducts. A second solenoid valve controlling the airflow direction is installed at the outlet of the coarse filter. The composite dehumidification and cooling device also has a second cooling state and a second dehumidification state. When in the second cooling state, the second solenoid valve controls the coarse filter to connect with the surface cooler, and the first solenoid valve controls the airflow in the first air intake fan to flow to the cabinet. Outside air flows into the surface cooler after being filtered by the coarse filter, and the cooled air is sent into the cabinet by the first air intake fan. When in the second dehumidification state, the second solenoid valve controls the coarse filter to connect with the surface cooler, and the first solenoid valve controls the airflow in the first inlet fan to flow to the primary dehumidification impeller. Outside air flows into the surface cooler after being filtered by the coarse filter. The cooled air is blown by the first inlet fan to the dehumidification zone of the primary dehumidification impeller. The air that has undergone preliminary dehumidification flows through the fine filter together with the air in the cabinet and is blown by the second inlet fan to the dehumidification zone and transition zone of the advanced dehumidification impeller. The air flowing through the dehumidification zone flows into the cabinet for dehumidification. The air flowing through the transition zone is heated by the main heater and then flows back to the main regeneration zone of the advanced dehumidification impeller. The preliminarily humidified air leaves the main regeneration zone under the drive of the first outlet fan, is heated by the auxiliary heater, and flows to the regeneration zone of the primary dehumidification impeller. The second outlet fan discharges the humidified air in the regeneration zone of the primary dehumidification impeller to the outside.

4. The intelligent dehumidification and cooling high-voltage switchgear for photovoltaic fields according to claim 1, characterized in that, Both the primary dehumidification impeller and the advanced dehumidification impeller include an impeller body, two support legs that support the rotating shaft of the impeller body, and a speed-regulating motor connected to the impeller body via a belt. The surface of the rotor body is coated with an elastic moisture-absorbing material. There is a movable gap between the support leg plate and the rotor body. The two support leg plates are arranged vertically and are symmetrical with respect to the vertical central axis of the rotor body. The two support leg plates divide the rotor body into a dehumidification zone and a regeneration zone, and the area of ​​the dehumidification zone is 3:1 compared with the area of ​​the regeneration zone.

5. A high-voltage switchgear for intelligent dehumidification and cooling of a photovoltaic field according to claim 4, characterized in that, Both the primary dehumidification impeller and the advanced dehumidification impeller also include a water squeezer and a moisture detector. When the moisture detector detects that the moisture content of the impeller body exceeds a set threshold, the water squeezer squeezes the impeller body to squeeze out the moisture.

6. A high-voltage switchgear for intelligent dehumidification and cooling of a photovoltaic field according to claim 5, characterized in that, The water squeezer is installed on the support leg plate and located on one side of the roller body. The water squeezer includes two electric push rods, a buffer block installed at the end of the electric push rods, and a pressure roller connecting the two buffer blocks. The electric push rods drive the pressure roller to squeeze the water onto the roller body through the buffer blocks.

7. A high-voltage switchgear for intelligent dehumidification and cooling of a photovoltaic field according to claim 6, characterized in that, The buffer block has a groove, a bearing slide is installed in the groove, a compression spring is installed between the bearing slide and the inner wall of the groove, the compression spring has an elastic squeezing force on the bearing slide toward the wheel body, and the pressure roller is installed to the bearing slide.

8. A high-voltage switchgear for intelligent dehumidification and cooling of a photovoltaic field according to claim 6, characterized in that, From the center of the rotating wheel body to the edge of the rotating wheel body, the outer diameter of the pressure roller gradually increases. In a plane perpendicular to the rotating wheel body, one side of the pressure roller close to the rotating wheel body is parallel to the surface of the rotating wheel body.

9. A high-voltage switchgear for intelligent dehumidification and cooling of a photovoltaic field according to claim 5, characterized in that, The moisture detector is a moisture content detection sensor installed on the main body of the impeller, or a weight sensor installed on the support leg plate.

10. A high-voltage switchgear for intelligent dehumidification and cooling of a photovoltaic field according to claim 1, characterized in that, The intelligent environmental sensing device also includes a fault diagnosis and emergency handling module connected to the controller. Based on historical data and real-time monitoring data, the module predicts equipment faults through machine learning algorithms. When an anomaly is detected, the controller automatically adjusts the operating mode of the dehumidification and cooling system and sends a fault warning to the power supply monitoring system.

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