A switch cabinet control device and method based on electrolytic dehumidification film with wide working range

Abstract

The invention discloses a switch cabinet control device and method based on a wide working range electrolytic dehumidification membrane, and relates to the technical field of moisture-proof dehumidification equipment. It includes a switch cabinet body, an exhaust air duct, an electrolytic dehumidification component, a DC voltage regulator, a temperature sensor and a humidity sensor are provided inside the switch cabinet body, a single-chip control system is provided outside, and a ventilation hole is provided on the side wall to communicate with the outlet of the exhaust air duct; the electrolytic dehumidification component includes an upper and lower shell body and a dehumidification membrane electrode pressed in the upper and lower shell bodies, and an inlet fan and an exhaust fan are connected to both sides of the upper and lower shell bodies. The dehumidification membrane electrode includes a first mesh electrode, an electrolytic dehumidification membrane and a second mesh electrode arranged in sequence; a composite coating of a catalyst and a hygroscopic inorganic filler is sprayed on the mesh electrode; the dehumidification membrane material is a polymer doped with a hygroscopic inorganic filler and a thermally stable organic filler. The working range is wide (-10~70℃, 20%~100%RH), suitable for extreme environments such as cold and hot, without problems such as icing, frost or damage due to overcooling or overheating.

Description

Technical Field

[0001] The present invention relates to the technical field of moisture-proof dehumidification equipment, and in particular to a switch cabinet control device and method based on an electrolytic dehumidification film with a wide working range. Background Art

[0002] The switch cabinet is an electrical equipment. Since it contains a large number of electrical components and sensors, the temperature and humidity inside the cabinet have an important impact on its stability and insulation performance. The switch cabinet is often in direct contact with the outdoor environment and is easily affected by moisture erosion. When the humidity inside the switch cabinet is too high or the ambient temperature is lower than the dew point temperature of the air inside the cabinet, condensation or even water accumulation will occur, causing problems such as terminal row corrosion, instrument insulation degradation, and internal contact short circuit. The ambient temperature of the switch cabinet varies significantly, which can drop to -10°C in winter and reach above 60°C in summer; the humidity in the box is generally 60-100% in humid conditions and 20~60% in low humidity conditions. When the outdoor temperature is low and the humidity is high, the internal wall will frost and ice; high temperature and high humidity will cause the instruments in the switch cabinet to rust and there is a possibility of overheating; when the ambient humidity is low, there is also a need for preventive or local dehumidification in the switch cabinet. According to statistics, from 2016 to 2018, 70% of the failures of power equipment such as box-type transformers, outdoor terminal boxes, and ring network cabinets were directly or indirectly caused by condensation and frost, seriously affecting the safety of distribution networks and the normal power supply to users.

[0003] At present, the moisture-proof of switch cabinets generally has the following defects: fully enclosed switch cabinets can prevent moisture from entering the cabinet, but at the same time it also makes it difficult for the internal moisture to be discharged smoothly. Installing a heating tube can increase the temperature inside the cabinet and thus reduce the relative humidity, but it will cause the temperature inside the cabinet to rise, and when the heating tube is turned on, the hot air rises, which will accelerate the condensation of moisture on the top. In addition, too high a temperature inside the switch cabinet will also cause the components to age, thereby affecting the life of the components. Placing a desiccant in the switch cabinet can achieve a significant moisture-proof effect, but once the desiccant is saturated, the dehumidification effect is lost, and the replacement and maintenance costs are high. The rotary dehumidification equipment is complex, occupies a large area, and has high energy consumption, making it difficult to apply in practice. Semiconductor condensation dehumidification uses semiconductor refrigeration chips to condense moisture and then discharge it out of the cabinet through a water pipe, which has the risk of water leakage; and when the outdoor temperature is high (40 degrees or above), it is difficult to dehumidify due to the difficulty of heat dissipation of the refrigeration chip, and when the outdoor temperature is low (10 degrees or below), the water accumulation box will freeze, which will not only fail to dehumidify but may also cause serious problems. In addition, the diameter of the semiconductor dehumidification drainage pipe is generally 8~10mm, which will destroy the IP protection level of the switch cabinet and may cause more serious accidents.

[0004] The electrolytic dehumidification technology based on proton exchange membrane is an electrochemical active humidity treatment method. By applying a low-voltage electric field on both sides of the electrolytic dehumidification membrane, the water vapor on the anode side (i.e. in the box) undergoes an electrolytic reaction, and the generated H +The water molecules carried pass through the electrolytic dehumidification membrane to the environment side (i.e. outside the box) to generate water vapor again, thereby discharging excess humidity in the box. There is no condensation or risk of icing during the electrolytic dehumidification process. The thickness of the electrolytic dehumidification membrane is only about 1mm, which is compact and suitable for assembly in the form of dehumidification modules according to different target humidity and space requirements. The exhaust opening is small and easy to maintain. The dehumidification rate can be accurately adjusted by adjusting the applied electric field to facilitate control. In addition, the electrolytic dehumidification membrane dehumidification technology combined with the cabinet exhaust can reduce the humidity in the cabinet while discharging excess heat, so as to achieve the purpose of controlling the microenvironment of the switch cabinet.

[0005] Patent KR102100128B1 discloses a switch cabinet with an electrolytic dehumidification function. Although the porous electrode carbon fiber is improved in this invention, the core of the electrolytic dehumidification membrane, namely the proton conductive polymer, is not improved. Currently, the commonly used proton conductive polymer is perfluorosulfonic acid (PFSA) polymer, which has problems such as easy damage at high temperature, low proton conductivity at low temperature or low humidity, and difficult electrochemical reaction, which limits its application range. For this reason, it is necessary to develop an electrolyte membrane with a wide working range that can work normally in an environment of -10~70℃ and 20~100%RH, which is suitable for switch cabinets with large environmental changes. Summary of the invention

[0006] The purpose of the present invention is to provide a switch cabinet control device and method based on an electrolytic dehumidification film with a wide working range, so as to solve the problems mentioned in the above background technology that the existing devices are difficult to achieve moisture-proof effects or the equipment is complex, maintenance is difficult, and drainage pipes are required. In particular, it solves the problems of large changes in outdoor ambient temperature (below zero degrees to above 60°C), frosting of other dehumidification methods, and inability to be used at high temperatures, improves the moisture-proof performance of the switch cabinet in actual use, especially under extreme working conditions, optimizes the microenvironment inside the switch cabinet, and reduces the failure rate of electrical components inside the switch cabinet.

[0007] To achieve the above-mentioned purpose, the present invention provides a switch cabinet control device based on an electrolytic dehumidification film with a wide working range, comprising a switch cabinet, wherein an exhaust air duct, an electrolytic dehumidification component, a DC voltage regulator connected to the electrolytic dehumidification component, a temperature sensor and a humidity sensor are provided inside the switch cabinet, and a single-chip control system is provided outside the switch cabinet, and a ventilation hole is provided on the side wall of the switch cabinet and is connected to the outlet of the exhaust air duct; the electrolytic dehumidification component comprises an upper shell, a lower shell and a dehumidification membrane electrode pressed tightly in and abutting against the upper shell and the lower shell, and an inlet fan and an exhaust fan are connected to the two sides of the upper shell and the lower shell respectively; the dehumidification membrane electrode comprises a first mesh electrode, an electrolytic dehumidification membrane and a second mesh electrode arranged in sequence;

[0008] Among them, the working temperature and humidity range of the wide working range electrolytic dehumidification membrane is -10~70℃, 20%~100%RH; the electrolytic dehumidification membrane material is a proton conductive polymer doped with hygroscopic inorganic filler and thermally stable organic filler, among which, by mass percentage, the hygroscopic inorganic filler is 1~10%, the thermally stable organic filler is 1~30%, and the proton conductive polymer is 60~98%.

[0009] Preferably, the first mesh electrode and the second mesh electrode have the same structure, both of which are metal mesh structures sprayed with a composite coating; wherein the composite coating comprises the following components in weight percentage: 50-89% catalyst particles, 10-40% proton conductive polymer, and 1-10% hygroscopic inorganic filler; the metal mesh material is one of titanium, nickel, molybdenum, stainless steel and alloys thereof, the metal mesh thickness is 0.5-2 mm, and the mesh size is 5-20.

[0010] Preferably, the hygroscopic inorganic filler is one of SiO2, ZrO2 and TiO2; the thermally stable organic filler is a low water-swelling fluorine-containing polymer or an ether-, sulfone- or ketone-containing polymer; and the proton-conducting polymer is one of perfluorosulfonic acid resin, sulfonated polysulfone and aromatic polymer.

[0011] Preferably, the low water-swellable fluorine-containing polymer is polytetrafluoroethylene or polyvinylidene fluoride; the ether-, sulfone- or ketone-containing polymer is one of polyetheretherketone, sulfonated polysulfone, polyethersulfone and polybenzimidazole.

[0012] Preferably, the catalyst is one of iridium, ruthenium, platinum, titanium, molybdenum and alloy particles thereof supported on a conductive carrier, the catalyst particle size is 4-50 nm, and the conductive carrier is one of titanium, tin, carbon or a composite material thereof.

[0013] Preferably, the connection terminals of the first mesh electrode and the second mesh electrode are connected to the DC voltage regulator via wires.

[0014] Preferably, the DC voltage regulator, the temperature sensor, the humidity sensor, the air inlet fan and the exhaust fan are all electrically connected to the single chip control system.

[0015] The present invention also provides a switch cabinet control method based on a wide working range electrolytic dehumidification film, comprising the following steps:

[0016] (1) The temperature sensor and humidity sensor respectively collect the temperature information and humidity information inside the switch cabinet and send them to the single-chip control system;

[0017] (2) Control the opening of the air inlet fan or the exhaust fan based on the collected temperature and humidity information;

[0018] When the single-chip control system determines that the humidity in the cabinet is too high, it controls the inlet fan to turn on; or when the single-chip control system determines that the temperature in the cabinet is too high, it controls the exhaust fan to turn on; or when the single-chip control system determines that both the temperature and humidity in the cabinet are too high, it controls the fan and the exhaust fan to turn on.

[0019] Therefore, the present invention provides a switch cabinet control device and method based on a wide working range electrolytic dehumidification film, which has the following advantages:

[0020] (1) The electrolytic dehumidification membrane uses low-voltage direct current to drive the decomposition of moisture and transfer it from inside the cabinet to outside the cabinet. No condensed water is generated, no drainage pipe is required, and there is no safety hazard. At the same time, it can also avoid the temperature increase inside the switch cabinet caused by heating and moisture-proofing, thereby improving the moisture-proof performance of the switch cabinet, avoiding excessive temperature inside the cabinet, and reducing the failure rate of electrical components inside the switch cabinet;

[0021] (2) The electrolytic dehumidification membrane provided by the present invention has a wide working range. In addition to being able to work at room temperature (20-40°C), it can withstand high temperatures up to 70°C and low temperatures down to -10°C. It can also work normally at relative humidity of 20-100% without any problems such as damage, failure, frost or water freezing.

[0022] (3) The device of the present invention has a simple structure, and the electrolytic dehumidification component is easy to control. The voltage can be adjusted by the single-chip control system to accurately control the dehumidification effect, and the response is fast;

[0023] (4) The moisture-proof and temperature-control function of the switch cabinet of the present invention is realized by a single-chip microcomputer control system. The temperature sensor and humidity sensor monitor the temperature and humidity inside the cabinet. When the temperature is too high, the single-chip microcomputer control system starts the exhaust fan and increases the power; when the humidity sensor detects that the humidity is too high, the dehumidification device and the air intake fan are started and the power is increased. Therefore, the present invention can accurately control the humidity inside the cabinet, prevent condensation inside the cabinet, and ensure that the temperature inside the cabinet will not be too high, thereby improving the stability and service life of the electrical components inside the switch cabinet.

[0024] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the external structure of a switch cabinet control device based on an electrolytic dehumidification film with a wide working range according to the present invention;

[0026] Figure 2 It is a schematic diagram of the internal structure of a switch cabinet control device based on an electrolytic dehumidification film with a wide working range according to the present invention.

[0027] Reference numerals

[0028] 1. Switch cabinet; 2. DC voltage regulator; 3. Temperature sensor; 4. Humidity sensor; 5. Single chip microcomputer control system; 6. Ventilation hole; 7. Upper shell; 8. Lower shell; 9. Inlet fan; 10. Exhaust fan; 11. First mesh electrode; 12. Electrolytic dehumidification film; 13. Second mesh electrode. DETAILED DESCRIPTION

[0029] like Figure 1-2 As shown, the present invention provides a switch cabinet control device based on a wide working range electrolytic dehumidification film, including a switch cabinet 1, an exhaust air passage is provided inside the switch cabinet 1, and an electrolytic dehumidification component, a DC voltage regulator 2, a temperature sensor 3 and a humidity sensor 4 are provided. A single-chip control system 5 is provided outside the switch cabinet 1, and a ventilation hole 6 is provided on the side wall of the switch cabinet 1 and is connected to the outlet of the exhaust air passage; multiple temperature sensors 3 and humidity sensors 4 can be provided inside the cabinet to monitor the temperature and humidity around key electrical components in the cabinet. The DC voltage regulator 2, the temperature sensor 3, the humidity sensor 4, the inlet fan 9 and the exhaust fan 10 are all electrically connected to the single-chip control system 5.

[0030] The electrolytic dehumidification assembly includes an upper shell 7, a lower shell 8, and a dehumidification membrane electrode pressed into and abutting the upper shell 7 and the lower shell 8. The upper shell 7 and the lower shell 8 are connected to the two sides of the inlet fan 9 and the exhaust fan 10 respectively; the humidity sensor 4 is arranged near the inlet fan 9, and the temperature sensor 3 is arranged near the exhaust fan 10. The dehumidification membrane electrode includes a first mesh electrode 11, an electrolytic dehumidification membrane 12, and a second mesh electrode 13 arranged in sequence; the terminals of the first mesh electrode 11 and the second mesh electrode 13 are connected to the DC voltage regulator 2 through wires.

[0031] In the present invention, the electrolytic dehumidification membrane material comprises the following components in weight percentage: 1-10% hygroscopic inorganic filler, 1-30% thermally stable organic filler, and 60-98% proton conductive polymer.

[0032] In the present invention, the hygroscopic inorganic filler is one of SiO2, ZrO2 and TiO2; the thermally stable organic filler is one of fluorine-containing polymers such as polytetrafluoroethylene or polyvinylidene fluoride, or one of ether-based, sulfone-based and ketone-based polymers such as polyetheretherketone, sulfonated polysulfone, polyethersulfone, polybenzimidazole; the proton-conducting polymer is one of perfluorosulfonic acid resin, sulfonated polysulfone, and aromatic polymer.

[0033] In the present invention, the first mesh electrode and the second mesh electrode have the same structure, both of which are metal mesh structures sprayed with a composite coating of catalyst and inorganic hygroscopic filler; wherein the composite coating includes the following components in weight percentage: 50-89% catalyst particles, 10-40% proton conductive polymer, and 1-10% hygroscopic inorganic filler; the metal mesh material is one of titanium, nickel, molybdenum, stainless steel and alloys thereof, the metal mesh thickness is 0.5-2 mm, and the mesh number is 5-20.

[0034] In the present invention, the catalyst is one of iridium, ruthenium, platinum, titanium, molybdenum and alloy particles thereof supported on a conductive carrier, the catalyst particle size is 4-50nm, and the conductive carrier is one of titanium, tin, carbon or a composite material thereof. Methods for supporting the catalyst on a conductive carrier include electrostatic spinning, in-situ synthesis, and sol-gel method.

[0035] The present invention also provides a switch cabinet control method based on a wide working range electrolytic dehumidification film, comprising the following steps:

[0036] (1) The temperature sensor and humidity sensor respectively collect the temperature information and humidity information inside the switch cabinet and send them to the single-chip control system;

[0037] (2) Control the opening of the air inlet fan or the exhaust fan based on the collected temperature and humidity information;

[0038] a. When the single-chip control system determines that the temperature in the cabinet is normal and the humidity is too high based on the temperature and humidity information, it controls the electrolytic dehumidification component to start and the inlet fan to turn on; if the humidity in the cabinet deviates greatly from the set value, it controls to increase the power of the electrolytic dehumidification component and the inlet fan;

[0039] b. When the single-chip control system determines that the temperature in the cabinet is too high and the humidity is normal based on the temperature and humidity information, it controls the exhaust fan in the exhaust duct to turn on; if the temperature in the cabinet deviates greatly from the set value, it controls to increase the power of the exhaust fan;

[0040] c. When the single-chip control system determines that the temperature and humidity in the cabinet are too high based on the temperature and humidity information, it controls the electrolytic dehumidification component to start and the inlet fan to turn on, and at the same time controls the exhaust fan in the exhaust duct to turn on; if the temperature and humidity in the cabinet deviate greatly from the set value, it controls to increase the power of the electrolytic dehumidification component, the inlet fan and the exhaust fan.

[0041] The detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0043] The specific connection methods of each part all adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0044] According to the present invention, the above electrolytic dehumidification film is used to conduct experiments in order to further understand the present invention, and the protection scope of the present invention is not limited by the following examples. The following examples verify the experimental results of the electrolytic dehumidification film provided by the present invention applied to the moisture-proof of the switch cabinet.

[0045] The electrolyte membrane in the following embodiments is a proton conductive polymer doped with a hygroscopic inorganic filler and a thermally stable organic filler, specifically: 6% hygroscopic inorganic filler, 30% thermally stable organic filler, 64% proton conductive polymer. The mesh electrode is a metal mesh structure sprayed with a composite coating of a catalyst and an inorganic hygroscopic filler, the metal mesh material is titanium, and the metal mesh thickness is 1 mm. The composite coating specifically includes: 70% catalyst particles, 25% proton conductive polymer, and 5% hygroscopic inorganic filler.

[0046] The proton conducting polymer used is perfluorosulfonic acid resin, the hygroscopic inorganic filler is SiO2, the thermally stable organic filler is polytetrafluoroethylene, and the catalyst used is iridium oxide particles supported on a titanium mesh, with a catalyst particle size of 5 nm.

[0047] Example 1

[0048] This embodiment verifies the cabinet moisture-proofing results of different electrolytic dehumidification film structures, and the results are shown in Table 1. The dehumidification system used for cabinet moisture-proofing operates under the following conditions: the cabinet volume is 40L, and no components are placed inside the cabinet. The temperature inside the cabinet is 24°C during operation, and the initial humidity inside the cabinet is 65%. The electrolytic dehumidification film is installed inside the cabinet and connected to the external environment through the exhaust air duct. In this embodiment, only the DC voltage regulator 2 connected to the electrolytic dehumidification component is turned on, the operating voltage is 3V, and the supply fan and exhaust fan are not turned on.

[0049] Table 1 Summary of cabinet moisture-proof results with different electrolytic dehumidification film structures

[0050] ;

[0051] It can be seen from Table 1 that the cabinet using the electrolytic dehumidification film proposed in the present invention achieves a good dehumidification and moisture-proof effect, and the electrolytic dehumidification film using the mesh electrode proposed in the present invention has a better moisture-proof effect.

[0052] Example 2

[0053] This example verifies the cabinet moisture-proof results at different temperatures, and the results are shown in Table 2. The electrolytic dehumidification membrane is installed inside the cabinet and connected to the external environment through the exhaust air duct. In this example, only the DC voltage regulator connected to the electrolytic dehumidification component is turned on, the operating voltage is 3V, and the supply fan and exhaust fan are turned on. The electrolytic dehumidification membrane is operated under the following conditions: the relative humidity in the cabinet is 80%, and the operating time is 30 minutes. The dehumidification rate is calculated as follows:

[0054] ;

[0055] In the formula, m 除湿 is the dehumidification rate of the electrolytic dehumidification membrane, V is the box size, w is the absolute humidity content of air (g / kg dry air); τ is the running time; ρ is the density of moist air.

[0056] Table 2 Summary of cabinet moisture-proof results at different temperatures

[0057] ;

[0058] It can be seen from Table 2 that the dehumidification rate of the cabinet moisture-proofing based on the wide working range electrolytic dehumidification film proposed in the present invention increases with the increase of the operating temperature, and the electrolytic dehumidification film achieves a good cabinet moisture-proofing effect at both high and low temperatures, especially under operating conditions above 60°C and below 0°C, it still operates stably without overheating, freezing, frosting, etc.

[0059] Example 3

[0060] This embodiment verifies the cabinet moisture-proof results under different control conditions, and the results are shown in Table 3. The system operates under the following conditions: the cabinet volume is 6L, the cabinet starting temperature is 30°C, and the cabinet starting humidity is 60%. The electrolytic dehumidification membrane is installed inside the cabinet and connected to the outside world through the exhaust duct. In this embodiment, the DC voltage regulator and the single-chip control system connected to the electrolytic dehumidification component are turned on, the operating voltage is 3V, and the supply fan and exhaust fan are not turned on. The temperature and humidity changes in the box and the humidity control effect during operation are recorded by temperature and humidity sensors. When the sensor detects that the humidity in the box exceeds the target value, the single-chip control system turns on the electrolytic dehumidification film; when the sensor detects that the difference between the humidity in the box and the target value increases, the single-chip control system increases the power of the electrolytic dehumidification membrane and the power of the supply and exhaust fans.

[0061] Table 3 Summary of cabinet moisture-proof results under different control conditions

[0062] ;

[0063] It can be seen from Table 3 that the cabinet moisture-proofing based on the electrolytic dehumidification film proposed in the present invention can effectively avoid and solve the situation of increased relative humidity in the cabinet when the cabinet temperature drops, and the regulation is accurate and the humidity control precision is high.

[0064] Therefore, the present invention provides a switch cabinet control device and method based on an electrolytic dehumidification film with a wide working range, which solves the problem that semiconductor condensation dehumidification technology will freeze and become unusable when the outdoor environment is below zero degrees, improves the moisture-proof performance of the switch cabinet in actual use, avoids excessive temperature inside the cabinet, optimizes the microenvironment inside the switch cabinet, and reduces the failure rate of electrical components inside the switch cabinet.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A switch cabinet control device based on a wide working range electrolytic dehumidification film, characterized in that: The switch cabinet comprises a switch cabinet, wherein an exhaust duct, an electrolytic dehumidification component, a DC voltage regulator connected to the electrolytic dehumidification component, a temperature sensor and a humidity sensor are provided inside the switch cabinet, a single-chip control system is provided outside the switch cabinet, and a ventilation hole is provided on the side wall of the switch cabinet and is connected to the outlet of the exhaust duct; The electrolytic dehumidification assembly includes an upper shell, a lower shell, and a dehumidification membrane electrode pressed into and abutting the upper shell and the lower shell, and the upper shell and the lower shell are respectively connected to an inlet fan and an exhaust fan on both sides; the dehumidification membrane electrode includes a first mesh electrode, an electrolytic dehumidification membrane, and a second mesh electrode arranged in sequence; The wide working range of the electrolytic dehumidification membrane is -10-70°C and 20%-100%RH. The material of the electrolytic dehumidification membrane is a proton conductive polymer doped with a hygroscopic inorganic filler and a thermally stable organic filler, wherein, by mass percentage, the hygroscopic inorganic filler is 1-10%, the thermally stable organic filler is 1-30%, and the proton conductive polymer is 60-98%. The first mesh electrode and the second mesh electrode have the same structure, both of which are metal mesh structures sprayed with a composite coating of a catalyst and a hygroscopic inorganic filler; wherein the composite coating comprises the following components in percentage by weight: 50-89% catalyst particles, 10-40% proton conductive polymer, and 1-10% hygroscopic inorganic filler; the metal mesh material is one of titanium, nickel, molybdenum and alloys thereof or stainless steel, the metal mesh thickness is 0.5-2 mm, and the mesh number is 5-20; The hygroscopic inorganic filler is one of SiO2, ZrO2 and TiO2; the thermally stable organic filler is a low water-swelling fluorine-containing polymer or an ether-, sulfone- or ketone-containing polymer; and the proton-conducting polymer is one of perfluorosulfonic acid resin, sulfonated polysulfone and aromatic polymer.

2. A switch cabinet control device based on a wide working range electrolytic dehumidification film according to claim 1, characterized in that: The fluorine-containing polymer is polytetrafluoroethylene or polyvinylidene fluoride; the ether-, sulfone- or ketone-containing polymer is one of polyetheretherketone, sulfonated polysulfone, polyethersulfone and polybenzimidazole.

3. A switch cabinet control device based on a wide working range electrolytic dehumidification film according to claim 1, characterized in that: The catalyst is one of iridium, ruthenium, platinum, titanium, molybdenum and alloy particles thereof supported on a conductive carrier, the catalyst particle size is 4-50nm, and the conductive carrier is one of titanium, tin, carbon or a composite material thereof.

4. A switch cabinet control device based on a wide working range electrolytic dehumidification film according to claim 1, characterized in that: The connection terminals of the first mesh electrode and the second mesh electrode are connected to the DC voltage regulator through wires.

5. A switch cabinet control device based on a wide working range electrolytic dehumidification film according to claim 1, characterized in that: The DC voltage regulator, the temperature sensor, the humidity sensor, the air inlet fan and the exhaust fan are all electrically connected to the single chip control system.

6. A control method for a switch cabinet device based on a wide working range electrolytic dehumidification film according to any one of claims 1 to 5, characterized in that: The following steps are involved: (1) The temperature sensor and humidity sensor respectively collect the temperature information and humidity information inside the switch cabinet and send them to the single-chip control system; (2) Control the opening of the air inlet fan or the exhaust fan based on the collected temperature and humidity information; When the single-chip control system determines that the humidity in the cabinet is too high, it controls the inlet fan to turn on; or when the single-chip control system determines that the temperature in the cabinet is too high, it controls the exhaust fan to turn on; or when the single-chip control system determines that both the temperature and humidity in the cabinet are too high, it controls the fan and the exhaust fan to turn on.

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