Air cooling control cabinet and air cooling method thereof

Abstract

The invention discloses an air cooling control cabinet and an air cooling method thereof. The air cooling control cabinet comprises a control cabinet body. A cabinet door is arranged on the front side of the control cabinet body, a ventilation window is arranged at the position, close to the bottom, of the cabinet door, a front side mounting plate and a rear side mounting plate are arranged in the control cabinet body, the front side mounting plate and the rear side mounting plate are vertically arranged in a spaced mode, and the front side mounting plate is located in front of the rear side mounting plate; the top of the front mounting plate and the top of the rear mounting plate are connected with the top of the control cabinet body, the distance between the rear mounting plate and the bottom of the control cabinet body is larger than that between the bottom of the front mounting plate and the bottom of the control cabinet body, and an air duct is formed between the front mounting plate and the rear mounting plate. A control case is arranged between the upper half part of the front side mounting plate and the upper half part of the rear side mounting plate, a UPS power supply, an electric reactor and a frequency converter are arranged at the bottom in the control cabinet body, and the UPS power supply, the electric reactor and the frequency converter are all located behind the front side mounting plate; and a fan is arranged at the top of the control cabinet body and between the front side mounting plate and the rear side mounting plate.

Description

Technical Field

[0001] The present invention belongs to the field of electrical control cabinets and relates to an air-cooled control cabinet and an air-cooling method therefor. Background Art

[0002] An electrical control cabinet is a common device used to control power electronic transformers, energy storage converters, and other electrical equipment. It has various different types of components to provide power, protect the equipment, and achieve automated control. It is an important component of an electrical system and is widely used in various industrial fields, including manufacturing, energy, construction, and transportation, etc.

[0003] The working principle of the control cabinet can be simply summarized as controlling electrical equipment through the input of control signals. An electrical control cabinet generally consists of five parts: input signals, control elements, power supply and power distribution, protection devices, and control circuits.

[0004] During the working process of the electrical control cabinet, the control signal is transmitted from the input device (such as buttons and switches) to the control elements in the control cabinet. The control elements judge whether to start or stop the motor and other equipment according to the received signal type and conditions. If starting is required, the control elements will connect the power supply to the motor through the control circuit to make it start running. Once the equipment starts running, the control circuit will maintain the power supply until a stop signal is received. Then, the control elements will disconnect the power supply of the motor to make it stop running.

[0005] In addition, the control cabinet can also achieve more complex functions through additional devices such as sensors and computers. The sensors can be used to detect parameters such as temperature, humidity, and pressure, and transmit these parameters to the computer system for processing. The computer system can adjust the working state of the motor and other equipment through the control elements according to the feedback signals of the sensors to achieve automated control.

[0006] In summary, the electrical control cabinet plays a crucial role in various industrial fields, improving production efficiency and safety and achieving automated control. However, a large amount of heat is generated by the electrical components in the control cabinet during the working process. If this heat cannot be effectively dissipated, it will cause the temperature of the electronic components to rise, affecting their normal operation and even possibly causing equipment damage.

[0007] The Chinese patent application with the authorization announcement number of "CN205544897U" discloses a low-voltage frequency conversion control cabinet with a double heat dissipation air duct structure. There is a sealed air duct for the frequency converter in the cabinet body, including a small front door, an air duct side plate, an air duct back plate, an air duct baffle and a top air duct. The small front door is installed at the lower part of the front of the cabinet body, the air duct side plate is installed at the bottom of the cabinet body, the air duct back plate is installed on the air duct side plate, the air duct baffle is installed on the air duct back plate, the frequency converter is installed on the air duct baffle, the top air duct is installed at the top of the cabinet body. There is an isolation air duct for the filter in the cabinet body, including a large front door, a ventilation grille at the bottom of the large front door and a ventilation grille at the top of the large front door. The large front door is installed at the upper part of the front of the cabinet body, the ventilation grille at the bottom of the large front door is installed at the bottom of the large front door, the ventilation grille at the top of the large front door is installed at the top of the large front door, and a heat dissipation fan is installed on the ventilation grille at the top of the large front door. The filter is installed in the cabinet body at the bottom of the large front door. The double air duct structure design inside the cabinet enables the hot air discharged by the heating elements to be independently discharged outside the cabinet, avoiding mutual influence between the heating elements.

[0008] However, in the case where not many mounting plates are required inside the cabinet for this patent, a lot of side plates, baffles and back plates are added, and the design of the air duct leads to an increase in the cost of the control cabinet.

[0009] The Chinese patent application with the authorization announcement number of "CN214205309U" discloses a low-voltage frequency conversion control cabinet with a double heat dissipation air duct structure, including a cabinet body. A cabinet door is provided on the front side of the cabinet body, and the cabinet door is movably connected to the cabinet body through a hinge. A plurality of first through holes are opened on both sides of the cabinet body, and a plurality of air distribution boxes are fixedly provided inside both sides of the cabinet body. The plurality of air distribution boxes are evenly distributed at the top and bottom of the first through holes. A plurality of second through holes are opened on one side of the air distribution box, and a fan is provided inside the air distribution box. In the utility model, the air generated by the cold air blower enters the inside of the square shell through the second pipeline, and then is dispersed into the inside of the cabinet body through the first pipeline, which can dissipate heat and cool down multiple positions of the control equipment inside the cabinet body. The hot air generated by the operation of the control equipment will be discharged from the inside of the cabinet body through the first through holes, which can enable both spaces separated by the partition to dissipate heat independently, and the heat dissipation speed is fast, thereby prolonging the service life of the utility model.

[0010] However, this patent divides the inside of the cabinet into layers, which is inconvenient for wiring. Too many ventilation pipes will reduce the protection level of the cabinet body, and it is only applicable to simple control cabinets and is not suitable for control cabinets with many electrical components and complex wiring. Summary of the Invention

[0011] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and provide an air-cooled control cabinet and its air-cooling method, with a simple air duct heat dissipation structure and low cost, achieving a good heat cycle inside the control cabinet body, thereby realizing the stable operation of the control cabinet.

[0012] To achieve the above purpose, the present invention adopts the following technical solutions: An air-cooled control cabinet, comprising a control cabinet body; A cabinet door is provided on the front side of the control cabinet body. A ventilation window is provided near the bottom of the cabinet door. Inside the control cabinet body, a front mounting plate and a rear mounting plate are provided. The front mounting plate and the rear mounting plate are vertically spaced apart, and the front mounting plate is located in front of the rear mounting plate; The tops of both the front mounting plate and the rear mounting plate are connected to the top of the control cabinet body. The distance between the rear mounting plate and the bottom of the control cabinet body is greater than the distance between the bottom of the front mounting plate and the bottom of the control cabinet body. A ventilation duct is formed between the front mounting plate and the rear mounting plate; A control chassis is provided between the upper halves of the front mounting plate and the rear mounting plate. A UPS power supply, a reactor, and an inverter are provided at the bottom inside the control cabinet body. The UPS power supply, the reactor, and the inverter are all located behind the front mounting plate; A fan is provided between the front mounting plate and the rear mounting plate at the top of the control cabinet body.

[0013] Preferably, there is a first fan in the UPS power supply that blows air backward.

[0014] Preferably, an EMC shielding plate is provided around the reactor and the inverter.

[0015] Preferably, a plurality of ventilation holes are provided at the top of the EMC shielding plate, and the ventilation holes are communicated with the ventilation duct between the front mounting plate and the rear mounting plate.

[0016] Preferably, a second fan that blows air upward is provided below both the reactor and the inverter.

[0017] Preferably, a temperature control system is provided at the bottom of the control cabinet body. The temperature control system includes two temperature sensors and a temperature controller. The two temperature sensors are respectively provided inside the reactor and the inverter. The output end of the temperature sensor is connected to the input end of the temperature controller, and the output end of the temperature controller is connected to the control input end of the second fan.

[0018] Preferably, a temperature control system is provided at the top of the control cabinet body. The temperature control system includes a plurality of temperature sensors and a temperature controller. The number of temperature sensors is the same as the number of control chassis. One temperature sensor is provided inside each control chassis. The output end of the temperature sensor is connected to the input end of the temperature controller, and the output end of the temperature controller is connected to the control input end of the fan.

[0019] Preferably, the ventilation window adopts a louver ventilation window.

[0020] An air-cooling method for an air-cooled control cabinet, comprising the following processes: The fan at the top of the control cabinet body starts, and cold air enters the interior of the control cabinet body through the ventilation window at the bottom of the front cabinet door of the control cabinet body. Then it passes in front of the front mounting plate from the bottom of the front mounting plate to the rear of the front mounting plate. After passing through the UPS power supply, reactor, and frequency converter, it carries the heat of the UPS power supply, reactor, and frequency converter, flows into the air duct between the front mounting plate and the rear mounting plate, and then is mixed with the heat dissipated by the control chassis and is drawn out by the fan and discharged to the outside of the control cabinet body.

[0021] Preferably, the temperature sensors in the reactor, frequency converter, and control chassis continuously monitor their operating temperatures and transmit the operating temperatures to the corresponding temperature controllers. The temperature controllers adjust the speeds of the second fan and the fan according to the temperature signals; when the temperature rises, the speeds of the second fan and the fan increase; when the temperature drops, the speeds of the second fan and the fan decrease.

[0022] Compared with the prior art, the present invention has the following beneficial effects: The heat dissipation air duct structure designed by the present invention allows air to enter through the ventilation opening below the front door, pass through the UPS power supply at the bottom inside the control cabinet, rise through the air duct to near the chassis, exchange heat with the heat of the boards inside the chassis, and then be drawn out by the fan at the top of the cabinet. This design makes the air flow path more reasonable, can effectively discharge the heat evenly from all parts of the control cabinet, avoids the phenomenon of overheating in some parts, improves the temperature uniformity inside the control cabinet, can reduce the failure rate of the electronic components inside the control cabinet due to overheating, extends the service life of the equipment, and further reduces the maintenance cost. And this heat dissipation air duct structure does not require layering or adding too many partitions to the control cabinet body, and the cost is relatively low.

[0023] Furthermore, EMC shielding plates are designed around the frequency converter and the reactor. While preventing the reactor and the frequency converter from generating electromagnetic interference to the control chassis, the ventilation holes at the top of the EMC shielding plates are connected to the air ducts of the front mounting plate and the rear mounting plate. The second fan below the reactor and the frequency converter can blow the heat dissipated by the reactor and the frequency converter through the EMC shielding plates into the air duct between the front mounting plate and the rear mounting plate.

[0024] Furthermore, the temperature control system controls the speed of the second fan or the fan through the signal given by the temperature sensor and the corresponding temperature controller, which can effectively improve the heat dissipation efficiency of the control cabinet, and at the same time reduce the energy consumption and the impact of noise on the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the control cabinet structure of the present invention; Figure 2 It is a schematic diagram of the internal heat dissipation air duct structure of the control cabinet of the present invention.

[0026] Wherein: 1 - control cabinet body, 2 - louvered ventilation window, 3 - front mounting plate, 4 - rear mounting plate, 5 - control chassis, 6 - UPS power supply, 7 - reactor, 8 - frequency converter, 9 - fan, 10 - EMC shielding plate. Detailed implementation manner

[0027] The following will describe in detail the implementation manners of the present invention. Examples of the implementation manners are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The implementation manners described below with reference to the drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms "mounting", "connecting" and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection, an electrical connection or a connection capable of mutual communication; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. The term "and / or" used herein includes any and all combinations of one or more of the related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include indirect contact between the first and second features through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0031] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0032] As Figure 1 and Figure 2 shown, the air-cooled control cabinet described in this embodiment includes a control cabinet body 1.

[0033] The control cabinet body 1 is made of welded steel plates and its surface is subjected to rust prevention treatment. A cabinet door is provided on the front side of the control cabinet body 1. A ventilation window is provided near the bottom of the cabinet door. The ventilation window communicates the outside and inside of the control cabinet body 1 to ensure that the cold air outside the control cabinet body 1 can smoothly enter the control cabinet body 1. In this embodiment, the ventilation window adopts a louver ventilation window 2.

[0034] A front mounting plate 3 and a rear mounting plate 4 are provided inside the control cabinet body 1. The front mounting plate 3 and the rear mounting plate 4 are vertically arranged and are both parallel to the cabinet door on the front side of the control cabinet body 1 when the cabinet door is closed. The front mounting plate 3 is close to the cabinet door on the front side of the control cabinet body 1, and the rear mounting plate 4 is close to the rear wall on the rear side of the control cabinet body 1.

[0035] The tops of the front mounting plate 3 and the rear mounting plate 4 are both connected to the top of the control cabinet body 1. There is a gap between the bottom of the front mounting plate 3 and the bottom of the control cabinet body 1. The length of the rear mounting plate 4 is less than that of the front mounting plate 3. Therefore, the distance between the rear mounting plate 4 and the bottom of the control cabinet body 1 is greater than the distance between the bottom of the front mounting plate 3 and the bottom of the control cabinet body 1. A wind channel is formed between the front mounting plate 3 and the rear mounting plate 4.

[0036] A control chassis 5 is provided between the upper parts of the front mounting plate 3 and the rear mounting plate 4, and the control chassis 5 is fixed to the rear mounting plate 4.

[0037] At the bottom inside the control cabinet body 1, a UPS power supply 6, a reactor 7, and a frequency converter 8 are provided. The UPS power supply 6, the reactor 7, and the frequency converter 8 are all located between the front mounting plate 3 and the rear side of the control cabinet body 1, and directly below the rear mounting plate 4.

[0038] There is a first fan in the UPS power supply 6 that blows air backward, and the first fan draws cold air from the front of the front mounting plate 3 into the rear of the front mounting plate 3.

[0039] Electromagnetic Compatibility (EMC): It refers to the ability of a device or system to operate in its electromagnetic environment in compliance with requirements and not generate intolerable electromagnetic interference to any device in its environment. Therefore, EMC includes two aspects of requirements: on the one hand, it means that the electromagnetic disturbance generated by the device during normal operation in its environment cannot exceed a certain limit; on the other hand, it means that the device has a certain degree of immunity to the electromagnetic interference existing in its environment, that is, electromagnetic susceptibility (EMS).

[0040] Therefore, in this embodiment, EMC shielding plates 10 are provided around the reactor 7 and the frequency converter 8 to prevent electromagnetic interference. Multiple ventilation holes are provided at the top of the EMC shielding plates 10, and the ventilation holes are communicated with the air ducts of the front mounting plate 3 and the rear mounting plate 4. The EMC shielding plates 10 can not only effectively shield electromagnetic interference but also guide the air flow to flow upward. A second fan that blows air upward is provided below the reactor 7 and the frequency converter 8, and the second fan can blow out the heat dissipated by the reactor 7 and the frequency converter 8 through the air duct between the front mounting plate 3 and the rear mounting plate 4.

[0041] A fan 9 is provided at the top of the control cabinet body 1. The fan 9 communicates the inside and outside of the control cabinet body 1, and the fan 9 is used to extract the hot air inside the control cabinet body 1 and discharge it to the outside of the control cabinet body 1. The fan 9 is located between the front mounting plate 3 and the rear mounting plate 4. In this embodiment, the number of fans 9 is two.

[0042] There are two sets of temperature control systems installed inside the control cabinet body 1. Each set of temperature control systems includes several temperature sensors and temperature controllers. One set of temperature control systems is located at the bottom of the control cabinet body 1 and includes two temperature sensors. The two temperature sensors are respectively installed inside the reactor 7 and the frequency converter 8 to detect the temperatures of the reactor 7 and the frequency converter 8. The output end of the temperature sensor is connected to the input end of the temperature controller and sends the temperature information to the temperature controller of its own system. The output end of the temperature controller is connected to the control input end of the second fan to control the rotation speed of the second fan.

[0043] The other set of temperature control systems is located at the top of the control cabinet body 1. The number of its temperature sensors is the same as the number of control chassis 5. One temperature sensor is installed inside each control chassis 5 to detect the temperature of the control chassis 5. The output end of the temperature sensor is connected to the input end of the temperature controller and sends the temperature information to the temperature controller of its own system. The output end of the temperature controller is connected to the control input end of the fan 9 to control the rotation speed of the fan 9.

[0044] The control cabinet body 1 adopts a heat dissipation design with air intake from the bottom and air exhaust from the top. Cold air enters the inside of the control cabinet body 1 through the ventilation window at the bottom of the front side cabinet door of the control cabinet body 1. After passing through the internal heat cycle of the UPS power supply 6, the reactor 7 and the frequency converter 8 at the bottom of the control cabinet body 1, it is blown into the air duct between the front side mounting plate 3 and the rear side mounting plate 4, exchanges heat with the control chassis 5 upward, and finally is drawn out of the control cabinet body 1 by the fan 9 at the top of the control cabinet body 1. The heat dissipation air duct structure inside the control cabinet body 1 can form a heat cycle system to evenly dissipate the heat inside the control cabinet body 1 and avoid the problem of local overheating.

[0045] An EMC shielding plate 9 is provided around the reactor 7 and the frequency converter 8 inside the control cabinet body 1. While preventing the reactor 7 and the frequency converter 8 from generating electromagnetic interference to the control chassis 5, ventilation holes are provided at the top of the EMC shielding plate 9. The ventilation holes are communicated with the air ducts of the front side mounting plate 3 and the rear side mounting plate 4. A second fan is designed below the reactor 7 and the frequency converter 8. The second fan can blow the heat dissipated by the reactor 7 and the frequency converter 8 out through the EMC shielding plate 9 into the air duct between the front side mounting plate 3 and the rear side mounting plate 4.

[0046] A fan 9 for air extraction is provided at the top of the control cabinet body 1, which can blow out the hot air blown out by the first fan and the second fan at the bottom and the heat dissipated by the control chassis 5 inside the control cabinet body 1 from the top. The two sets of temperature control systems control the rotation speeds of the second fan and the fan 9 through the signals given by the temperature sensors and the corresponding temperature controllers, which can effectively improve the heat dissipation efficiency of the control cabinet, reduce energy consumption and the impact of noise on the working environment at the same time.

[0047] For the air-cooled control cabinet described in this embodiment, its air-cooling process is as follows: After the cold air enters the control cabinet body 1 through the louvered ventilation window 2 at the bottom of the front door of the control cabinet body 1, it first flows through the UPS power supply 6. The UPS power supply 6 is equipped with a first fan inside. The first fan sucks the cold air from the front of the front mounting plate 3 through the bottom of the front mounting plate 3 and into the rear of the front mounting plate 3, and dissipates heat from the UPS power supply 6.

[0048] The second fan below the reactor 7 and the frequency converter 8 blows the cold air towards the reactor 7 and the frequency converter 8, and discharges it upward through the ventilation holes at the top of the EMC shielding plate 9, and enters the space between the front mounting plate 3 and the rear mounting plate 4. The EMC shielding plate 9 can not only effectively shield electromagnetic interference, but also guide the air flow to flow upward.

[0049] The gas discharged from the UPS power supply 6, the reactor 7 and the frequency converter 8 is mixed with the heat dissipated by the control chassis 5 to form a central hot air flow. Since the control chassis 5 is located at the top of the control cabinet body 1 near the fan 9, the hot air flow can flow upward smoothly and is finally extracted by the top fan 9.

[0050] Temperature sensors are installed on the reactor 7, the frequency converter 8 and the control chassis 5 to continuously monitor their operating temperatures. The temperature sensors transmit the temperature signals to the corresponding temperature controllers, and the temperature controllers adjust the speeds of the second fan and the fan 9 according to the temperature signals. When the temperature rises, the speeds of the second fan and the fan 9 increase to enhance the heat dissipation effect; when the temperature drops, the speeds of the second fan and the fan 9 slow down to reduce energy consumption and noise.

[0051] The serial numbers of the above embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0052] In the above embodiments of the present application, the descriptions of each embodiment have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0053] In the several embodiments provided by the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only illustrative. For example, the division of the units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the coupling or direct coupling or communication connection shown or discussed with each other can be through some interfaces. The indirect coupling or communication connection of the units or modules can be in an electrical or other form.

[0054] The unit described as a separation component may or may not be physically separated. The component shown as a unit may or may not be a physical unit, that is, it may be located in one place or may be distributed over multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0055] The above description is only a preferred embodiment of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

[0056] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and many applications other than the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this patent should not be determined by reference to the above description, but should be determined by reference to the full scope of the foregoing claims and the equivalents thereof. For the sake of completeness, all articles and references including patent applications and publications are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein from the foregoing claims is not intended to abandon such subject matter, nor should it be considered that the applicant has not considered such subject matter to be part of the disclosed inventive subject matter.

Claims

1. An air-cooled control cabinet, characterized in that: It includes a control cabinet body (1); A cabinet door is arranged on the front side of the control cabinet body (1), and a ventilation window is arranged near the bottom of the cabinet door. A front mounting plate (3) and a rear mounting plate (4) are arranged inside the control cabinet body (1), and the front mounting plate (3) and the rear mounting plate (4) are arranged vertically spaced apart, and the front mounting plate (3) is located in front of the rear mounting plate (4); The tops of the front mounting plate (3) and the rear mounting plate (4) are both connected to the top of the control cabinet body (1), the distance between the rear mounting plate (4) and the bottom of the control cabinet body (1) is greater than the distance between the bottom of the front mounting plate (3) and the bottom of the control cabinet body (1), and an air duct is formed between the front mounting plate (3) and the rear mounting plate (4); A control box (5) is arranged between the front mounting plate (3) and the upper part of the rear mounting plate (4); a UPS power supply (6), a reactor (7) and a frequency converter (8) are arranged at the bottom of the control cabinet body (1); the UPS power supply (6), the reactor (7) and the frequency converter (8) are all located behind the front mounting plate (3); A fan (9) is arranged on the top of the control cabinet body (1) between the front mounting plate (3) and the rear mounting plate (4).

2. The air-cooled control cabinet according to claim 1, characterized in that: The UPS power supply (6) has a first fan for blowing air backwards.

3. The air-cooled control cabinet according to claim 1, characterized in that: An EMC shielding plate (10) is provided around the reactor (7) and the frequency converter (8).

4. The air-cooled control cabinet according to claim (3), characterized in that: A plurality of ventilation holes are arranged on the top of the EMC shielding plate (10), and the ventilation holes are connected to the air ducts of the front mounting plate (3) and the rear mounting plate (4).

5. The air-cooled control cabinet according to claim 1, characterized in that: A second fan for blowing air upwards is provided below the reactor (7) and the frequency converter (8).

6. The air-cooled control cabinet according to claim 5, characterized in that: A temperature control system is arranged at the bottom of the control cabinet body (1), and the temperature control system comprises two temperature sensors and a temperature controller. The two temperature sensors are arranged inside the reactor (7) and the frequency converter (8) respectively, and the output end of the temperature sensor is connected to the input end of the temperature controller, and the output end of the temperature controller is connected to the control input end of the second fan.

7. The air-cooled control cabinet according to claim 1, characterized in that: A temperature control system is arranged on the top of the control cabinet body (1), and the temperature control system comprises a plurality of temperature sensors and a temperature controller. The number of the temperature sensors is the same as the number of the control cabinets (5), and each control cabinet (5) is provided with a temperature sensor inside. The output end of the temperature sensor is connected to the input end of the temperature controller, and the output end of the temperature controller is connected to the control input end of the fan (9).

8. The air-cooled control cabinet according to claim 1, characterized in that: The ventilation window is a shutter ventilation window (2).

9. An air cooling method for an air cooling control cabinet according to any one of claims 1 to 8, characterized in that: The process includes: The fan (9) on the top of the control cabinet body (1) is started, and cold air enters the control cabinet body (1) from the ventilation window at the bottom of the front cabinet door of the control cabinet body (1), and then flows from the front of the front mounting plate (3) through the bottom of the front mounting plate (3) to the rear of the front mounting plate (3), passes through the UPS power supply (6), the reactor (7) and the inverter (8), and then flows into the air duct between the front mounting plate (3) and the rear mounting plate (4) with the heat of the UPS power supply (6), the reactor (7) and the inverter (8), and then mixes with the heat dissipated by the control cabinet (5), and is extracted by the fan (9) and discharged to the outside of the control cabinet body (1).

10. The air cooling method according to claim 9, characterized in that: The temperature sensors in the reactor (7), the frequency converter (8) and the control box (5) continuously monitor their operating temperatures and transmit the operating temperatures to the corresponding temperature controllers. The temperature controllers adjust the speeds of the second fan and the blower (9) according to the temperature signals. When the temperature rises, the speeds of the second fan and the blower (9) increase. When the temperature drops, the speeds of the second fan and the blower (9) decrease.

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