Electrical cabinet humidity real-time control device and method

Abstract

The invention provides an electrical cabinet humidity real-time control device and method, and the device comprises an electrical cabinet, and also comprises a controller; the humidity sensor is electrically connected with the controller and is used for detecting the air humidity in the electrical cabinet; the ionic membrane dehumidifier is arranged on the cabinet body wall of the electrical cabinet; the ionic membrane dehumidifier comprises an ionic membrane, a first electrode and a second electrode, and the first electrode and the second electrode are located inside and outside the electrical cabinet respectively; the controller is used for controlling the first electrode and the second electrode of the ionic membrane dehumidifier to be switched between the cathode and the anode. The humidity value in the electrical cabinet can be detected in real time, when the humidity value in the electrical cabinet is not within a set reasonable range, humidification and dehumidification can be achieved by controlling polarity conversion of the two electrodes of the ionic membrane dehumidifier, the humidity in the electrical cabinet is adjusted to be within the set reasonable range, and the electrical cabinet is convenient to use. Therefore, the normal use and the use safety of the electrical cabinet can be effectively ensured, and the service life of the electrical cabinet can be effectively prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of humidity control inside an electrical cabinet, and in particular to a device and method for real-time humidity control of an electrical cabinet. Background Art

[0002] High-voltage electrical cabinets are composed of housings, electrical components (including insulating devices), various mechanisms, secondary terminals and connecting wires. The working performance of electrical components and various terminals is greatly affected by temperature and humidity. For example, when the humidity in the electrical cabinet is too high, the insulation performance will be reduced, which may easily cause problems such as insulation device damage, discharge, and tripping. Therefore, in order to improve the service life and safety of electrical cabinets, it is of great significance to design a real-time humidity control device for electrical cabinets, which has received great attention in recent years.

[0003] Many researchers have limited the humidity control of electrical cabinets to more traditional methods, and the control effect is poor. For example, the electrical cabinet dehumidification device mentioned by Guan Zhijun in the article "Research on Dehumidification and Anti-condensation Technology of Electrical Cabinets and Development of Monitoring Platform" uses heating and ventilation methods to achieve humidity control. However, since temperature and humidity are related, using heating to control temperature will inevitably change humidity, which seriously affects the control effect of the entire system. Moreover, when using ventilation to control humidity, the electrical cabinet may inhale dust from the environment outside the cabinet into the electrical cabinet during ventilation with the outside of the cabinet, which will accelerate the accumulation of dust in the electrical cabinet. The accumulation of dust in the electrical cabinet will cause the working performance of some electrical components to decline and increase the risk of conductivity, which may cause short circuits or circuit failures. In addition, it is also possible that harmful gases in the electrical cabinet are directly discharged into the air outside the cabinet, causing harm to the human body.

[0004] In the existing patent technology, the invention patent document with publication number CN117311426A discloses a real-time control method for temperature and humidity of a high-voltage switch cabinet based on edge model predictive control, which is applied to the field of switch cabinet detection technology. Through the perception layer, the on-site control and analysis of the switch cabinet operating environment data are realized through the acquisition terminal in the switch cabinet; the network layer connects the switch cabinet status to big data or the cloud through wireless or wired devices; the data layer realizes regional autonomy through terminal edge computing; the application layer realizes different monitoring and analysis according to different states through the terminal; the high-voltage switch cabinet temperature and humidity prediction and real-time control system based on edge computing is provided, through offline computing in the cloud and online computing on the edge device in the switch cabinet; efficient parallel processing of data and control models is realized, data analysis and processing are completed quickly, and accurate prediction of the operating environment of the high-voltage switch cabinet and real-time control of temperature and humidity are realized.

[0005] The design of the above patent is very complex and has poor feasibility. It is not suitable for a single electrical cabinet or a small number of electrical cabinets. Moreover, it does not disclose a specific humidity control structure. It is difficult to achieve real-time control of the humidity inside the electrical cabinet only through the technical solution disclosed. Therefore, it is a challenging and important task to study an efficient, feasible and widely applicable real-time control device and method for humidity in electrical cabinets. Summary of the invention

[0006] The object of the present invention is to provide a real-time humidity control device and method for an electrical cabinet, aiming to improve the deficiencies of the prior art proposed in the above background technology in real-time humidity control inside the electrical cabinet.

[0007] The present invention is achieved in that:

[0008] According to a first aspect of the present invention, the present invention provides a real-time humidity control device for an electrical cabinet, comprising an electrical cabinet, and further comprising:

[0009] Controller;

[0010] A humidity sensor, electrically connected to the controller, for detecting the air humidity inside the electrical cabinet;

[0011] An ion membrane dehumidifier is installed on the cabinet wall of an electrical cabinet; the ion membrane dehumidifier comprises an ion membrane, a first electrode and a second electrode, wherein the first electrode and the second electrode are respectively located inside and outside the electrical cabinet; the ion membrane dehumidifier is electrically connected to a controller, and the controller is used to control the first electrode and the second electrode of the ion membrane dehumidifier to switch between a cathode and an anode, and one of the first electrode and the second electrode is an anode and the other is a cathode.

[0012] Furthermore, the controller is also electrically connected to a stirring fan, and the stirring fan is arranged in the electrical cabinet, and the stirring fan is used to stir the air inside the electrical cabinet.

[0013] Furthermore, the controller is also electrically connected to a temperature sensor, and the temperature sensor is used to detect the air temperature inside the electrical cabinet.

[0014] Furthermore, a heat exchanger is provided in the electrical cabinet, the heat exchanger has a refrigerant inlet end and a refrigerant outlet end, the heat exchanger is connected to a refrigerant delivery system, and the refrigerant delivery system is electrically connected to the controller.

[0015] According to a second aspect of the present invention, the present invention provides a method for real-time control of humidity in an electrical cabinet, using the above-mentioned real-time control device for humidity in an electrical cabinet to perform real-time control of the humidity inside the electrical cabinet.

[0016] Further, the following steps are included:

[0017] S10, the controller reads the humidity detection value H of the humidity sensor;

[0018] S20, the controller compares the humidity detection value H of the humidity sensor with a set humidity threshold, wherein the humidity threshold includes a first humidity threshold H1 and a second humidity threshold H2, and H1<H2;

[0019] S30. The controller performs the following control according to the comparison result:

[0020] S31, when H≤H1, the controller controls the ion membrane dehumidifier to operate, and controls the first electrode of the ion membrane dehumidifier to be a cathode, and controls the second electrode of the ion membrane dehumidifier to be an anode;

[0021] S32, when H1<H<H2, the ion membrane dehumidifier does not start;

[0022] S33. When H2≤H, the controller controls the ion membrane dehumidifier to operate, and controls the first electrode of the ion membrane dehumidifier to be an anode, and controls the second electrode of the ion membrane dehumidifier to be a cathode.

[0023] According to a third aspect of the present invention, the present invention provides a method for real-time control of humidity in an electrical cabinet, using the above-mentioned real-time control device for humidity in an electrical cabinet to perform real-time control of humidity inside the electrical cabinet, comprising the following steps:

[0024] S100, the controller reads the humidity detection value H of the humidity sensor and reads the temperature detection value C of the temperature sensor;

[0025] S200, the controller compares the humidity detection value H of the humidity sensor with a set humidity threshold, and compares the temperature detection value C of the temperature sensor with a set humidity threshold C0, wherein the humidity thresholds include a first humidity threshold H1 and a second humidity threshold H2, and H1<H2;

[0026] S300: The controller performs the following control according to the comparison result:

[0027] S310, when H≤H1, the controller controls the ion membrane dehumidifier to operate, and controls the first electrode of the ion membrane dehumidifier to be a cathode, and controls the second electrode of the ion membrane dehumidifier to be an anode;

[0028] S320, when H1<H<H2, the ion membrane dehumidifier does not start;

[0029] S330, when H2≤H, the controller controls the ion membrane dehumidifier to operate, and controls the first electrode of the ion membrane dehumidifier to be an anode, and controls the second electrode of the ion membrane dehumidifier to be a cathode;

[0030] S340, when C<C0, the controller does not send a signal to the refrigerant delivery system, and the refrigerant delivery system does not deliver refrigerant to the heat exchanger;

[0031] S350, when C0≤C, the controller sends a signal to the refrigerant delivery system, and the refrigerant delivery system delivers refrigerant to the heat exchanger to reduce the temperature inside the electrical cabinet.

[0032] Furthermore, the first humidity threshold H1 is 40%, and the second humidity threshold H2 is 60%.

[0033] Furthermore, the humidity threshold C0 is 40°C.

[0034] Furthermore, the controller is also electrically connected to a stirring fan, the stirring fan is arranged in the electrical cabinet, and the stirring fan is used to stir the air inside the electrical cabinet;

[0035] In step S30, when the controller controls the ion membrane dehumidifier to operate, the stirring fan is also controlled to start;

[0036] In step S300, when the controller controls the ion membrane dehumidifier and / or the refrigerant delivery system to operate, the stirring fan is controlled to start at the same time.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. The present invention can detect the humidity value inside the electrical cabinet in real time, and when the humidity value inside the electrical cabinet is not within a set reasonable range, humidification and dehumidification can be achieved by controlling the polarity change of the two electrodes of the ion membrane dehumidifier, and the humidity inside the electrical cabinet can be adjusted to within a set reasonable range. This can effectively ensure the normal use and safety of the electrical cabinet, and at the same time effectively extend the service life of the electrical cabinet.

[0039] 2. The present invention uses an ion membrane dehumidifier to adjust the humidity inside the electrical cabinet. It can work by simply adding a 3V voltage to the electrodes of the ion membrane dehumidifier. It not only has low energy consumption, but also has no vibration, no liquid water, and is safe to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a schematic structural diagram of a real-time humidity control device for an electrical cabinet provided in Example 1 of the present invention;

[0041] Figure 2 This is a block diagram of the electrical control structure of the real-time humidity control device for an electrical cabinet provided in Example 1 of the present invention;

[0042] Figure 3 is a flow chart of a method for real-time humidity control of an electrical cabinet provided in Example 2 of the present invention;

[0043] Figure 4 is a schematic structural diagram of a real-time humidity control device for an electrical cabinet provided in Embodiment 3 of the present invention;

[0044] Figure 5 This is a block diagram of the electrical control structure of the real-time humidity control device for an electrical cabinet provided in Embodiment 3 of the present invention;

[0045] Figure 6 is a flow chart of a method for real-time humidity control of an electrical cabinet provided in Example 4 of the present invention;

[0046] Figure 7 It is a structural schematic diagram of the real-time humidity control device for an electrical cabinet provided in Example 5 of the present invention.

[0047] In the figure: 1. electrical cabinet; 2. controller; 3. humidity sensor; 4. ion membrane dehumidifier; 5. stirring fan; 6. heat exchanger; 61. refrigerant inlet end; 62. refrigerant outlet end; 7. temperature sensor; 8. mounting bracket; 9. air flow diffusion element. DETAILED DESCRIPTION

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0050] Example 1

[0051] like Figure 1 and Figure 2As shown, this embodiment provides a real-time control device for humidity in an electrical cabinet, including an electrical cabinet 1, a controller 2, a humidity sensor 3 and an ion membrane dehumidifier 4, and the humidity sensor 3 and the ion membrane dehumidifier 4 are both electrically connected to the controller 2. The humidity sensor 3 is used to detect the air humidity inside the electrical cabinet 1 and transmit the detection value to the controller 2. The ion membrane dehumidifier 4 is installed on the cabinet wall of the electrical cabinet 1, and the ion membrane dehumidifier 4 includes an ion membrane, a first electrode and a second electrode, and the first electrode and the second electrode are respectively located inside and outside the electrical cabinet 1. The controller 2 can control the first electrode and the second electrode of the ion membrane dehumidifier 4 to switch between the cathode and the anode, and one of the first electrode and the second electrode is the anode and the other is the cathode. The anode is the dehumidification side of the ion membrane dehumidifier 4, and the water in the air is decomposed into hydrogen ions and oxygen. The cathode is the dehumidification side of the ion membrane dehumidifier 4, and the hydrogen ions freed by the ion membrane react with the oxygen in the air to form water, and it is gaseous water.

[0052] Example 2

[0053] This embodiment provides a method for real-time control of humidity in an electrical cabinet, and uses the real-time control device for humidity in an electrical cabinet provided in Embodiment 1 to perform real-time control of the humidity inside the electrical cabinet 1 .

[0054] like Figure 3 As shown, the following steps are included:

[0055] S10, the controller 2 reads the humidity detection value H of the humidity sensor 3, and the humidity detection value H is the relative humidity.

[0056] S20, the controller 2 compares the humidity detection value H of the humidity sensor 3 with the set humidity threshold, the humidity threshold includes a first humidity threshold H1 and a second humidity threshold H2, the first humidity threshold H1 is 40%, and the second humidity threshold H2 is 60%.

[0057] S30, controller 2 performs the following control according to the comparison result:

[0058] S31, when H≤H1, the controller 2 controls the ion membrane dehumidifier 4 to operate, and controls the first electrode of the ion membrane dehumidifier 4 to be the cathode, and controls the second electrode of the ion membrane dehumidifier 4 to be the anode. At this time, the humidity value inside the electrical cabinet 1 is low, and static electricity accumulation is likely to occur due to low humidity. Therefore, the first electrode of the ion membrane dehumidifier 4 located inside the electrical cabinet 1 is controlled to be the cathode, and the cathode is the moisture release side, so that the humidity inside the electrical cabinet 1 can be increased.

[0059] S32. When H1<H<H2, the ion membrane dehumidifier 4 is not started.

[0060] S33, when H2≤H, the controller 2 controls the ion membrane dehumidifier 4 to operate, and controls the first electrode of the ion membrane dehumidifier 4 to be the anode, and controls the second electrode of the ion membrane dehumidifier 4 to be the cathode. At this time, the humidity value inside the electrical cabinet 1 is high, so the first electrode of the ion membrane dehumidifier 4 located inside the electrical cabinet 1 is controlled to be the anode, and the anode is the dehumidification side, so that the humidity inside the electrical cabinet 1 can be reduced.

[0061] Example 3

[0062] like Figure 4 and Figure 5 As shown, this embodiment provides a real-time control device for humidity in an electrical cabinet, comprising an electrical cabinet 1, a controller 2, a humidity sensor 3, an ion membrane dehumidifier 4, a stirring fan 5, a heat exchanger 6 and a temperature sensor 7, wherein the humidity sensor 3, the ion membrane dehumidifier 4, the stirring fan 5 and the temperature sensor 7 are all electrically connected to the controller 2. The humidity sensor 3 is used to detect the air humidity inside the electrical cabinet 1 and transmit the detection value to the controller 2. The temperature sensor 7 is used to detect the air temperature inside the electrical cabinet 1 and transmit the detection value to the controller 2. The stirring fan 5 is arranged in the electrical cabinet 1, and the stirring fan 5 is used to stir the air inside the electrical cabinet 1 so that the humidity and temperature inside the electrical cabinet 1 are evenly distributed, thereby making the detection results of the humidity sensor 3 and the temperature sensor 7 more accurate. The heat exchanger 6 is arranged in the electrical cabinet 1, and the heat exchanger 6 has a refrigerant inlet end 61 and a refrigerant outlet end 62. The heat exchanger 6 is connected to a refrigerant delivery system, and the refrigerant delivery system is electrically connected to the controller 2. The refrigerant delivery system can use a cold water delivery system, which includes a water pump, a water tank, a refrigerator and a pipeline. The refrigerator is used to cool the circulating water in the water tank, and the water pump is used to transport the water in the water tank to the heat exchanger 6 through the refrigerant inlet end 61. The water transported to the heat exchanger 6 will flow back to the water tank through the refrigerant discharge end 62 and the pipeline.

[0063] like Figure 4 As shown, the ion membrane dehumidifier 4 is installed on the cabinet wall of the electrical cabinet 1, and the ion membrane dehumidifier 4 includes an ion membrane, a first electrode and a second electrode, and the first electrode and the second electrode are respectively located inside and outside the electrical cabinet 1. The controller 2 can control the first electrode and the second electrode of the ion membrane dehumidifier 4 to switch between the cathode and the anode, and one of the first electrode and the second electrode is the anode and the other is the cathode. The anode is the dehumidification side of the ion membrane dehumidifier 4, and the water in the air is decomposed into hydrogen ions and oxygen. The cathode is the dehumidification side of the ion membrane dehumidifier 4, and the hydrogen ions freed by the ion membrane react with the oxygen in the air to form water, and it is gaseous water.

[0064] Example 4

[0065] This embodiment provides a method for real-time control of humidity in an electrical cabinet, and uses the real-time control device for humidity in an electrical cabinet provided in Embodiment 3 to perform real-time control of the humidity inside the electrical cabinet 1 .

[0066] like Figure 3 As shown, the following steps are included:

[0067] S100, the controller 2 reads the humidity detection value H of the humidity sensor 3, and reads the temperature detection value C of the temperature sensor 7, wherein the humidity detection value H is the relative humidity.

[0068] S200, the controller 2 compares the humidity detection value H of the humidity sensor 3 with the set humidity threshold, and compares the temperature detection value C of the temperature sensor 7 with the set humidity threshold C0. The humidity thresholds include a first humidity threshold H1 and a second humidity threshold H2, the first humidity threshold H1 is 40%, the second humidity threshold H2 is 60%, and the humidity threshold C0 is 40°C.

[0069] S300, controller 2 performs the following control according to the comparison result:

[0070] S310, when H≤H1, the controller 2 controls the ion membrane dehumidifier 4 and the stirring fan 5 to operate, and controls the first electrode of the ion membrane dehumidifier 4 to be the cathode, and controls the second electrode of the ion membrane dehumidifier 4 to be the anode. At this time, the humidity value inside the electrical cabinet 1 is low, and the problem of static electricity accumulation is easily generated due to low humidity. Therefore, the first electrode of the ion membrane dehumidifier 4 located inside the electrical cabinet 1 is controlled to be the cathode, and the cathode is the moisture release side, so that the humidity inside the electrical cabinet 1 can be increased.

[0071] S320: When H1<H<H2, the ion membrane dehumidifier 4 is not started.

[0072] S330, when H2≤H, the controller 2 controls the ion membrane dehumidifier 4 and the stirring fan 5 to operate, and controls the first electrode of the ion membrane dehumidifier 4 to be the anode, and controls the second electrode of the ion membrane dehumidifier 4 to be the cathode. At this time, the humidity value inside the electrical cabinet 1 is high, so the first electrode of the ion membrane dehumidifier 4 located inside the electrical cabinet 1 is controlled to be the anode, and the anode is the dehumidification side, so that the humidity inside the electrical cabinet 1 can be reduced.

[0073] S340 , when C<C0, the controller 2 does not send a signal to the refrigerant delivery system, and the refrigerant delivery system does not deliver refrigerant to the heat exchanger 6 .

[0074] S350, when C0≤C, the controller 2 sends a signal to the refrigerant delivery system, and the refrigerant delivery system delivers refrigerant to the heat exchanger 6 to reduce the temperature inside the electrical cabinet 1. At the same time, the controller 2 controls the stirring fan 5 to operate.

[0075] In summary, the present invention can detect the humidity value inside the electrical cabinet 1 in real time, and when the humidity value inside the electrical cabinet 1 is not within the set reasonable range, the polarity change of the two electrodes of the ion membrane dehumidifier 4 can be controlled to achieve humidification and dehumidification, and the humidity inside the electrical cabinet 1 can be adjusted to the set reasonable range, so that the normal use and safety of the electrical cabinet 1 can be effectively guaranteed, and the service life of the electrical cabinet 1 can be effectively extended. The present invention adjusts the humidity inside the electrical cabinet 1 through the ion membrane dehumidifier 4, and only needs to add 3V voltage to the electrodes of the ion membrane dehumidifier 4 to work, which not only has low energy consumption, but also has no vibration, no liquid water, and is safe to use.

[0076] Example 5

[0077] like Figure 7 As shown, this embodiment has the following differences compared with embodiment 2:

[0078] In this embodiment, the stirring fan 5 is arranged at the bottom of the electrical cabinet 1, and a mounting frame 8 is arranged near the bottom of the electrical cabinet 1, the mounting frame 8 is located above the stirring fan 5, and the heat exchanger 6 is horizontally arranged on the mounting frame 8. There are multiple stirring fans 5, such as 2, 3, 4, etc., but at least one stirring fan 5 is arranged directly below the heat exchanger 6, and the stirring fan 5 blows air upward, and an air flow diffusion element 9 is arranged between the stirring fan 5 and the heat exchanger 6. The air flow diffusion element 9 includes a diffusion cover and at least two layers of air flow cutting filters arranged horizontally in the diffusion cover, and each air flow cutting filter is arranged in sequence in the upper and lower directions. The upper and lower ends of the diffusion cover are both opened, and the cross-sectional area of ​​the diffusion cover gradually increases from bottom to top. The lower port of the diffusion cover is aligned with the exhaust port at the upper end of the stirring fan 5, and the upper port is aligned with the heat exchanger 6. The air flow diffusion element 9 is used to diffuse the exhaust air of the stirring fan 5, increase the contact range between the exhaust air of the stirring fan 5 and the heat exchanger 6, and can effectively improve the heat exchange effect between the refrigerant flowing in the heat exchanger 6 and the exhaust air of the stirring fan 5, thereby effectively improving the use efficiency of the heat exchanger 6.

[0079] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A real-time humidity control device for an electrical cabinet, comprising an electrical cabinet (1), characterized in that: Also includes: Controller (2); A humidity sensor (3) is electrically connected to the controller (2) and is used to detect the air humidity inside the electrical cabinet (1); An ion membrane dehumidifier (4) is installed on a cabinet wall of an electrical cabinet (1); the ion membrane dehumidifier (4) comprises an ion membrane, a first electrode and a second electrode, the first electrode and the second electrode being located inside and outside the electrical cabinet (1), respectively; the ion membrane dehumidifier (4) is electrically connected to a controller (2), the controller (2) being used to control the first electrode and the second electrode of the ion membrane dehumidifier (4) to switch between a cathode and an anode, wherein one of the first electrode and the second electrode is an anode and the other is a cathode.

2. The real-time humidity control device for an electrical cabinet according to claim 1, characterized in that: The controller (2) is also electrically connected to a stirring fan (5), and the stirring fan (5) is arranged in the electrical cabinet (1). The stirring fan (5) is used to stir the air inside the electrical cabinet (1).

3. The real-time humidity control device for an electrical cabinet according to claim 1, characterized in that: The controller (2) is also electrically connected to a temperature sensor (7), and the temperature sensor (7) is used to detect the air temperature inside the electrical cabinet (1).

4. The real-time humidity control device for an electrical cabinet according to claim 3, characterized in that: The electrical cabinet (1) is provided with a heat exchanger (6), the heat exchanger (6) having a refrigerant inlet end (61) and a refrigerant outlet end (62), the heat exchanger (6) being connected to a refrigerant transport system, and the refrigerant transport system being electrically connected to the controller (2).

5. A real-time control method for humidity in an electrical cabinet, characterized in that: The real-time control of humidity inside the electrical cabinet (1) is performed using the electrical cabinet humidity real-time control device as described in any one of claims 1 to 4.

6. A method for real-time humidity control of an electrical cabinet according to claim 5, characterized in that: The steps include: S10, the controller (2) reads the humidity detection value H of the humidity sensor (3); S20, the controller (2) compares the humidity detection value H of the humidity sensor (3) with a set humidity threshold, wherein the humidity threshold includes a first humidity threshold H1 and a second humidity threshold H2, and H1<H2; S30, the controller (2) performs the following control according to the comparison result: S31, when H≤H1, the controller (2) controls the ion membrane dehumidifier (4) to operate, and controls the first electrode of the ion membrane dehumidifier (4) to be a cathode, and controls the second electrode of the ion membrane dehumidifier (4) to be an anode; S32, when H1<H<H2, the ion membrane dehumidifier (4) does not start; S33. When H2≤H, the controller (2) controls the ion membrane dehumidifier (4) to operate, and controls the first electrode of the ion membrane dehumidifier (4) to be the anode, and controls the second electrode of the ion membrane dehumidifier (4) to be the cathode.

7. A real-time control method for humidity in an electrical cabinet, characterized in that: Using the electrical cabinet humidity real-time control device according to claim 4 to perform real-time control of the humidity inside the electrical cabinet (1) comprises the following steps: S100, the controller (2) reads the humidity detection value H of the humidity sensor (3), and reads the temperature detection value C of the temperature sensor (7); S200, the controller (2) compares the humidity detection value H of the humidity sensor (3) with a set humidity threshold, and compares the temperature detection value C of the temperature sensor (7) with a set humidity threshold C0, wherein the humidity thresholds include a first humidity threshold H1 and a second humidity threshold H2, and H1<H2; S300, the controller (2) performs the following control according to the comparison result: S310, when H≤H1, the controller (2) controls the ion membrane dehumidifier (4) to operate, and controls the first electrode of the ion membrane dehumidifier (4) to be a cathode, and controls the second electrode of the ion membrane dehumidifier (4) to be an anode; S320, when H1<H<H2, the ion membrane dehumidifier (4) does not start; S330, when H2≤H, the controller (2) controls the ion membrane dehumidifier (4) to operate, and controls the first electrode of the ion membrane dehumidifier (4) to be an anode, and controls the second electrode of the ion membrane dehumidifier (4) to be a cathode; S340, when C<C0, the controller (2) does not send a signal to the refrigerant delivery system, and the refrigerant delivery system does not deliver refrigerant to the heat exchanger (6); S350, when C0≤C, the controller (2) sends a signal to the refrigerant delivery system, and the refrigerant delivery system delivers refrigerant to the heat exchanger (6) to reduce the temperature inside the electrical cabinet (1).

8. A method for real-time humidity control of an electrical cabinet according to claim 6 or 7, characterized in that: The first humidity threshold H1 is 40%, and the second humidity threshold H2 is 60%.

9. The method for real-time humidity control of an electrical cabinet according to claim 7, characterized in that: The humidity threshold C0 is 40°C.

10. A method for real-time humidity control of an electrical cabinet according to claim 6 or 7, characterized in that: The controller (2) is also electrically connected to a stirring fan (5), wherein the stirring fan (5) is arranged in the electrical cabinet (1), and the stirring fan (5) is used to stir the air inside the electrical cabinet (1); In step S30, when the controller (2) controls the ion membrane dehumidifier (4) to operate, the stirring fan (5) is also controlled to start; In step S300, when the controller (2) controls the ion membrane dehumidifier (4) and / or the refrigerant delivery system to operate, the stirring fan (5) is controlled to start at the same time.

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