Targeted air supply and dehumidification device and method for electrical screen cabinet

Abstract

The invention discloses a targeted air supply dehumidification device and method for an electrical cabinet, and the device comprises a heat pump unit, a power distribution cabinet comprises a bus chamber, a handcart chamber and a cable chamber, and the heat pump unit is communicated with an air supply port and an air return port of the bus chamber through a first group of air supply pipes and a first group of air return pipes. The heat pump unit is communicated with the air supply outlet and the air return inlet of the handcart chamber through a second group of air supply pipes and a second group of air return pipes, the heat pump unit is communicated with the air supply outlet and the air return inlet of the cable chamber through a third group of air supply pipes and a third group of air return pipes, and the air supply pipes and the air return pipes are arranged at a pressure relief plate at the top of the power distribution cabinet; the device can solve the problem that the power supply reliability level is reduced due to moisture condensation in the power distribution cabinet.

Description

Technical Field

[0001] The invention belongs to the technical field of dehumidification of power distribution cabinets, and relates to a targeted air supply, dehumidification and moisture removal device and method for an electrical panel cabinet. Background Art

[0002] Substations are an important component of the power system and an important node in the power network. The safe operation of electrical cabinets is the key to ensuring reliable power supply to users, and their internal operating environment, especially the hot and humid environment, will greatly affect their normal operation. Excessive temperature and humidity may cause device alarms, communication abnormalities and other accidents. To ensure the safe, reliable and stable operation of electrical equipment and power systems, a clean and dry cabinet environment is essential. Therefore, the problem of moisture condensation inside electrical cabinets has always attracted much attention.

[0003] The difficulty of traditional heating dehumidification technology is that the water it displaces is still in the cabinet. When the external environment cools down significantly, condensation will still occur. In addition, placing electric heating equipment in the cabinet will be restricted by the installation location, power size, and air circulation. There is a dead zone for anti-condensation, and heating can easily cause the circuit to age. Semiconductor condensation dehumidification technology is prone to misjudgment when the temperature changes drastically, and has low efficiency at low temperature and high humidity. It is easy to frost at the cold end and freeze the water box. There is a risk of water leakage, and the drain pipe damages the IP protection level. The material cost is relatively high. The dry cold air sent in by dry air dehumidification technology reduces the anti-condensation ability. The dehumidifier takes up space and has energy consumption problems. The anti-condensation effect is affected by the airflow organization in the cabinet. There is still room for optimization in achieving effective air supply and dehumidification. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and to provide a device and method for targeted air supply, dehumidification and moisture removal in an electrical cabinet, which can solve the problem of reduced power supply reliability level caused by moisture condensation in the distribution cabinet.

[0005] To achieve the above-mentioned purpose, the present invention discloses a targeted air supply, dehumidification and dehumidification device for an electrical cabinet, comprising a control module and a heat pump unit. The power distribution cabinet comprises a busbar room, a trolley room and a cable room. The heat pump unit is connected to the air supply port and the return air port of the busbar room through a first group of air supply pipes and a first group of return air pipes. The heat pump unit is connected to the air supply port and the return air port of the trolley room through a second group of air supply pipes and a second group of return air pipes. The heat pump unit is connected to the air supply port and the return air port of the cable room through a third group of air supply pipes and a third group of return air pipes. Each air supply pipe and return air pipe are arranged at the pressure relief plate on the top of the power distribution cabinet.

[0006] The air supply pipe is equipped with a targeted air supply port, and the targeted air supply port is provided with two guide vanes at the opening; a rectifying grid is connected between the two guide vanes;

[0007] The busbar room, the cable room and the trolley room are respectively provided with a first temperature and humidity sensor, a second temperature and humidity sensor and a third temperature and humidity sensor;

[0008] The control module controls the deflection angles of the guide vanes and the rectifying grille using a BP neural network and a PID controller according to the temperature and humidity information measured by the first temperature and humidity sensor, the second temperature and humidity sensor, and the third temperature and humidity sensor.

[0009] Furthermore, it also includes a rocker, and the guide vanes and the rectifying grid are connected through a bracket, and the bracket is connected to the rocker.

[0010] Furthermore, it also includes a receiving module and a grille angle control device, the output ends of the first temperature and humidity sensor, the second temperature and humidity sensor and the third temperature and humidity sensor are connected to the receiving module, the receiving module is connected to the control module, the control module is connected to the grille angle control device, and the grille angle control device is connected to the joystick.

[0011] Furthermore, the air supply outlet and the air return outlet are diagonally located in the busbar room, the trolley room and the cable room respectively.

[0012] Furthermore, a baffle is provided on the outer side of the targeted air supply port.

[0013] The invention discloses a method for targeted air supply, dehumidification and moisture removal of an electrical cabinet, comprising:

[0014] The readings of the first temperature and humidity sensor, the second temperature and humidity sensor, and the third temperature and humidity sensor are obtained respectively. T1, T2 and T3;

[0015] Calculate the temperature and humidity signals detected by the first temperature and humidity sensor, the second temperature and humidity sensor, and the third temperature and humidity sensor and the maximum temperature threshold T max and maximum humidity threshold The error value

[0016] The error value Input into the trained BP neural network to obtain the proportional constant K P , integration time constant K I and the differential time constant K D ;

[0017] The proportionality constant K P , integration time constant K I and the differential time constant K D The signal is input to the PID controller, and the angles of the guide vanes and the rectifier grid are controlled according to the output signal of the PID controller.

[0018] Furthermore, the BP neural network is trained by PSO algorithm.

[0019] Furthermore, it also includes a rocker, and the guide vanes and the rectifying grid are connected through a bracket, and the bracket is connected to the rocker.

[0020] Furthermore, the air supply outlet and the air return outlet are diagonally located in the busbar room, the trolley room and the cable room respectively.

[0021] Furthermore, a baffle is provided on the outer side of the targeted air supply port.

[0022] The present invention has the following beneficial effects:

[0023] The targeted air supply, dehumidification and dehumidification device and method for electrical cabinets described in the present invention, during specific operation, generates dry hot air through heat pump technology to solve the problem of moisture condensation in the cabinet, and delivers dry cold air into the cabinet based on the heat pump dehumidification technology, which not only can achieve the purpose of drying and heating the surface of the equipment, but also has a certain energy-saving effect, overcomes the potential dangers brought about by the traditional dehumidification technology of blindly adding electric heating equipment and the problem of uncertainty in the dehumidification effect that is easily affected by the external environment. Specifically, the control module uses the BP neural network and the PID controller to control the deflection angle of the guide vane and the rectifier grille according to the temperature and humidity information measured by the first temperature and humidity sensor, the second temperature and humidity sensor and the third temperature and humidity sensor, thereby improving the dehumidification efficiency of the distribution cabinet, prolonging the service life, reducing the cost of production investment, and achieving the purpose of energy saving and consumption reduction.

[0024] Furthermore, the targeted air supply vents with adjustable wind direction combined with temperature and humidity sensors can reasonably improve the airflow organization inside the cabinet, achieve fine directional air supply in areas prone to condensation, and solve the dehumidification dead zone problem caused by traditional air supply methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of the present invention;

[0026] Figure 2 It is a structural diagram of the targeted air supply port 1 in the present invention;

[0027] Figure 3 It is the control principle diagram of the present invention.

[0028] Among them, 1 is the targeted air supply outlet, 2 is the first temperature and humidity sensor, A is the busbar room, B is the cable room, 3 is the second temperature and humidity sensor, 4 is the return air outlet, 5 is the return air duct, C is the instrument room, 6 is the third temperature and humidity sensor, D is the trolley room, 7 is the air supply duct, 8 is the guide vane, 9 is the baffle, 10 is the junction box, 11 is the rocker wiring, 12 is the rocker, and 13 is the rectifier grille. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only an embodiment of a part of the present invention, not all embodiments, and is not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concepts disclosed in the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0030] The accompanying drawings show schematic diagrams of structures according to embodiments disclosed in the present invention. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0031] Embodiment 1

[0032] refer to Figure 1 The targeted air supply, dehumidification and dehumidification device for the electrical cabinet described in the present invention includes a heat pump unit, and the distribution cabinet includes a busbar room A, a trolley room D, a cable room B and an instrument room C, wherein the instrument room C has no dehumidification requirement, and the heat pump unit is connected to the air supply port and the return air port 4 of the busbar room A through a first group of supply air ducts 7 and a first group of return air ducts 5, and the heat pump unit is connected to the air supply port and the return air port 4 of the trolley room D through a second group of supply air ducts 7 and a second group of return air ducts 5, and the heat pump unit is connected to the air supply port and the return air port 4 of the cable room B through a third group of supply air ducts 7 and a third group of return air ducts 5, and each supply air duct 7 and return air duct 5 are arranged at the pressure relief plate on the top of the distribution cabinet to meet the explosion-proof protection level requirements of the distribution cabinet.

[0033] refer to Figure 2 and Figure 3 In order to avoid the problem of ineffective diffusion of hot and dry air caused by uneven air volume distribution, the air supply pipe 7 is equipped with a targeted air supply port 1, and the targeted air supply port 1 is provided with a pair of guide blades 8 at the opening for distributing and regulating the airflow inside the air supply pipe 7.

[0034] A uniformly distributed rectifying grid 13 is provided in the middle of the guide vane 8 to improve the uniformity of the air supply airflow organization, so that the dry hot gas is evenly diffused, the heat value exchange is more sufficient, and a better dehumidification effect is achieved.

[0035] The guide vanes 8 and the rectifying grille 13 are arranged symmetrically, and the guide vanes 8 and the rectifying grille 13 are connected by a bracket, and the bracket is connected to the rocker 12. The deflection angles of the guide vanes 8 and the rectifying grille 13 can be adjusted by the rocker 12 according to the actual external environment temperature and the environmental requirements of the air supply area to change the airflow direction, thereby achieving targeted and precise air supply, providing uniformly distributed dry hot airflow for the busbar room A, the trolley room D and the cable room B, and the inhibitory effect of the air supply on the low temperature influence of the bottom moisture source is enhanced, which can reduce the range of the low temperature dead corner to a certain extent.

[0036] In this embodiment, the busbar chamber A, the cable chamber B and the trolley chamber D are respectively arranged with a first temperature and humidity sensor 2, a second temperature and humidity sensor 3 and a third temperature and humidity sensor 6. The output ends of the first temperature and humidity sensor 2, the second temperature and humidity sensor 3 and the third temperature and humidity sensor 6 are connected to the receiving module for detecting the temperature information in the busbar chamber A, the trolley chamber D and the cable chamber B.

[0037] In this embodiment, the receiving module is connected to the control module, the control module is connected to the grille angle control device, and the grille angle control device is connected to the rocker 12 through the junction box 10 and the rocker connection 11, so as to adjust the deflection angle of the guide vane 8 and the rectifier grille 13, thereby realizing the wind direction control of the targeted air outlet 1 of the air supply pipe 7 of the busbar room A, the trolley room D and the cable room B.

[0038] In this embodiment, a baffle 9 is provided on the outer side of the targeted air supply port 1 .

[0039] In this embodiment, a control box is also included, in which the receiving module and the control module are located. The control box is arranged in the power distribution room. When working, the deflection angle of the guide vane 8 and the rectifying grille 13 is controlled by the rocker 12 according to the temperature and humidity measured by the first temperature and humidity sensor 2, the second temperature and humidity sensor 3 and the third temperature and humidity sensor 6 to adjust the air volume and air supply direction.

[0040] Embodiment 2

[0041] In order to obtain higher environmental regulation accuracy, the present invention combines the PSO algorithm, PID control system and the learning ability of the BP neural network to adjust the action parameters of the above-mentioned control module in real time, thereby improving the temperature and humidity control accuracy of the entire system. In order to solve the problem that the control module parameters cannot be adjusted according to real-time environmental changes during the operation of the targeted air supply outlet 1, a PSO-BP-PID control process for an autonomous temperature and humidity regulation system is proposed.

[0042] The readings of the first temperature and humidity sensor 2, the second temperature and humidity sensor 3 and the third temperature and humidity sensor 6 are respectively T1, T2 and T3.

[0043] The basic working process of PID control based on BP neural network is: the temperature and humidity signals detected by the first temperature and humidity sensor 2, the second temperature and humidity sensor 3 and the third temperature and humidity sensor 6 are sent to the control module through the receiving module, and the error value is calculated. Then the error Input it into the trained BP neural network, and convert the proportional constant K output by the BP neural network into P , integration time constant K I and the differential time constant K D To PID controller;

[0044] The output u(t) of the PID controller is:

[0045]

[0046] Among them, T set is the target supply air temperature, H set is the target air supply humidity (or air supply volume); T actual is the actual supply air temperature; H actual is the actual air supply humidity; T (t) is the temperature error = T set -T actual ;e H (t) is the humidity error = H set -H actual ;w T and H is the weight of temperature and humidity; e(t) is the comprehensive error, e(t) = w T ·e T (t)+w H ·e H (t), u(t) is the PID control output, that is, the angle control signal of the guide vane 8 and the rectifying grid 13.

[0047] Among them, the integral term This can be achieved through discretization, such as the cumulative error sum:

[0048] I(t)=I(t-1)+e(t)·Δt

[0049] Differential term This can be achieved through discrete difference form;

[0050]

[0051] Therefore, the discrete form of the PID controller can be expressed as:

[0052] u(t)=K p ·e(t)+K i I(t)+Kd ·D(t)

[0053] The set value can be set according to the temperature and humidity requirements of different regions. For example, in southern Shaanxi Province, according to the actual ambient temperature, the temperature of the trolley room D can be set to be higher than 28°C, and the unit can be started; the relative humidity of the busbar room A and the cable room B can be set to be higher than 50%, and the unit can be started.

[0054] The present invention uses the output of the PSO algorithm as the weight and threshold of the BP neural network control process of the autonomous temperature and humidity system, and then trains the control system to establish a mapping between input and output. Then the error value output by the BP neural network is used as the fitness function of the PSO algorithm and iterates continuously. Define the fitness function f(X i ) to evaluate the quality of particles. The fitness function can be designed based on the temperature and humidity control accuracy, stability and other indicators of the system. The sum of the squares of the temperature and humidity errors is used as the indicator of the fitness function.

[0055] The iteration performs the following steps for each iteration step t (t=1, 2, ..., max):

[0056] The speed is updated to:

[0057] V i (t+1)=w·V i (t)+c1·r1·(P i -X i (t))+c2·r2·(GX i (t))

[0058] Among them, w is the inertia weight; c1 and c2 are learning factors; r1 and r2 are random numbers uniformly distributed in the interval [0, 1]; P i is the individual optimal position of particle i; G is the global optimal position.

[0059] The location is updated to:

[0060] X i (t+1)=X i (t)+V i (t+1)

[0061] The optimal position of an individual is updated as follows: i (t+1)) than f(P i ) is better, then update P i For X i (t+1).

[0062] Global optimal position update: Find the particle with the best fitness among the individual optimal positions of all particles, and update G to the position of the particle. Reach the maximum number of iterations max. The fitness of the global optimal position meets the preset stop condition. Output the global optimal position G, that is, the optimal PID parameters Kp, Ki, Kd, ​​which can be used as the initial weights or training targets of the BP neural network for subsequent PID parameter adjustment.

[0063] By combining the above PID-BP control algorithm and the PSO module algorithm, the autonomous temperature and humidity system can adjust the deflection angles of the guide vanes 8 and the rectifying grid 13 in real time, thereby improving the accuracy and stability of temperature and humidity control.

[0064] Embodiment 3

[0065] A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of implementing the method for targeted air supply, dehumidification and dehumidification of the electrical cabinet are implemented, for example, including: obtaining the readings of the first temperature and humidity sensor 2, the second temperature and humidity sensor 3, and the third temperature and humidity sensor 6, respectively. T1, T2 and T3; Calculate the temperature and humidity signals detected by the first temperature and humidity sensor 2, the second temperature and humidity sensor 3 and the third temperature and humidity sensor 6 and the maximum temperature threshold T max and maximum humidity threshold The error value The error value Input into the trained BP neural network to obtain the proportional constant K P , integration time constant K I and the differential time constant K D ; The proportional constant K P , integration time constant K I and the differential time constant K D The signal is input to the PID controller, and the angles of the guide vanes 8 and the rectifying grid 13 are controlled according to the output signal of the PID controller. The memory may include a memory, such as a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk memory, etc. The processor, the network interface, and the memory are interconnected through an internal bus, and the internal bus may be an industrial standard architecture bus, a peripheral component interconnection standard bus, an extended industrial standard architecture bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. The memory is used to store programs. Specifically, the program may include a program code, and the program code includes computer operation instructions. The memory may include a memory and a non-volatile memory, and provide instructions and data to the processor.

[0066] Embodiment 4

[0067] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for targeted air supply, dehumidification and dehumidification of the electrical cabinet are implemented, for example, including: obtaining the readings of the first temperature and humidity sensor 2, the second temperature and humidity sensor 3 and the third temperature and humidity sensor 6, respectively T1, T2 and T3; Calculate the temperature and humidity signals detected by the first temperature and humidity sensor 2, the second temperature and humidity sensor 3 and the third temperature and humidity sensor 6 and the maximum temperature threshold T max and maximum humidity threshold The error value The error value Input into the trained BP neural network to obtain the proportional constant K P , integration time constant K I and the differential time constant K D ; The proportional constant K P , integration time constant K I and the differential time constant K D The output signal of the PID controller is input to control the angle of the guide vane 8 and the rectifying grid 13 according to the output signal of the PID controller. Specifically, the computer-readable storage medium includes, but is not limited to, volatile memory and / or non-volatile memory. The volatile memory may include random access memory (RAM) and / or cache memory (cache), etc. The non-volatile memory may include read-only memory (ROM), hard disk, flash memory, optical disk, magnetic disk, etc.

[0068] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0069] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0070] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0071] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A targeted air supply, dehumidification and dehumidification device for electrical cabinets, characterized in that: The heat pump unit comprises a control module and a heat pump unit. The power distribution cabinet comprises a busbar room (A), a trolley room (D) and a cable room (B). The heat pump unit is connected to the air supply port and the return air port (4) of the busbar room (A) through a first group of air supply pipes (7) and a first group of return air pipes (5). The heat pump unit is connected to the air supply port and the return air port (4) of the trolley room (D) through a second group of air supply pipes (7) and a second group of return air pipes (5). The heat pump unit is connected to the air supply port and the return air port (4) of the cable room (B) through a third group of air supply pipes (7) and a third group of return air pipes (5). Each air supply pipe (7) and return air pipe (5) are arranged at the pressure relief plate on the top of the power distribution cabinet. The air supply pipe (7) is equipped with a targeted air supply port (1), and the targeted air supply port (1) is provided with two guide vanes (8) at the opening; a rectifying grid (13) is connected between the two guide vanes (8); The busbar room (A), the cable room (B) and the trolley room (D) are respectively provided with a first temperature and humidity sensor (2), a second temperature and humidity sensor (3) and a third temperature and humidity sensor (6); The control module uses a BP neural network and a PID controller to control the deflection angles of the guide vanes (8) and the rectifying grid (13) according to the temperature and humidity information measured by the first temperature and humidity sensor (2), the second temperature and humidity sensor (3) and the third temperature and humidity sensor (6).

2. The targeted air supply, dehumidification and dehumidification device for electrical cabinets according to claim 1 is characterized in that: It also includes a rocker (12), and the guide vane (8) and the rectifying grid (13) are connected via a bracket, and the bracket is connected to the rocker (12).

3. The targeted air supply, dehumidification and dehumidification device for electrical cabinets according to claim 2 is characterized in that: It also includes a receiving module and a grille angle control device, wherein the output ends of the first temperature and humidity sensor (2), the second temperature and humidity sensor (3) and the third temperature and humidity sensor (6) are connected to the receiving module, the receiving module is connected to the control module, the control module is connected to the grille angle control device, and the grille angle control device is connected to the rocker (12).

4. The targeted air supply, dehumidification and dehumidification device for electrical cabinets according to claim 1 is characterized in that: The air supply port and the air return port (4) are respectively arranged diagonally in the busbar room (A), the trolley room (D) and the cable room (B).

5. The targeted air supply, dehumidification and dehumidification device for electrical cabinets according to claim 3 is characterized in that: A baffle (9) is provided on the outer side of the targeted air supply port (1).

6. A method for targeted air supply, dehumidification and dehumidification of electrical cabinets, characterized in that: include: Obtaining the readings of the first temperature and humidity sensor (2), the second temperature and humidity sensor (3) and the third temperature and humidity sensor (6) as φ1, φ2, φ3, T1, T2 and T3 respectively; Calculate the temperature and humidity signals detected by the first temperature and humidity sensor (2), the second temperature and humidity sensor (3) and the third temperature and humidity sensor (6) and the maximum temperature threshold value T max and the maximum humidity threshold φ max The error value (φ i -φ max , T i -T max ); The error value (φ i -φ max , T i -T max ) is input into the trained BP neural network to obtain the proportional constant K P , integration time constant K I and the differential time constant K D ; The proportionality constant K P , integration time constant K I and the differential time constant K D The signal is input to a PID controller, and the angles of the guide vanes (8) and the rectifying grid (13) are controlled according to the output signal of the PID controller.

7. The method for targeted air supply, dehumidification and dehumidification of electrical cabinets according to claim 6 is characterized in that: The BP neural network is trained by PSO algorithm.

8. The method for targeted air supply, dehumidification and dehumidification of electrical cabinets according to claim 6 is characterized in that: It also includes a rocker (12), and the guide vane (8) and the rectifying grid (13) are connected via a bracket, and the bracket is connected to the rocker (12).

9. The method for targeted air supply, dehumidification and dehumidification of electrical cabinets according to claim 6, characterized in that: The air supply port and the air return port (4) are respectively arranged diagonally in the busbar room (A), the trolley room (D) and the cable room (B).

10. The method for targeted air supply, dehumidification and dehumidification of electrical cabinets according to claim 6, characterized in that: A baffle (9) is provided on the outer side of the targeted air supply port (1).

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