Electrical cabinet and alternating current-direct current conversion device

Abstract

The utility model discloses an electrical cabinet and an AC-DC conversion device, and belongs to the technical field of electrical equipment, and the electrical cabinet comprises a cabinet body, a first electrical assembly, a first fan, a second electrical assembly and a second fan. The cabinet body is provided with a first air channel, a second air channel, a first air opening and a second air opening, the first electrical assembly and the first fan are arranged in the second air duct; the second electrical assembly and the second fan are arranged in the first air duct; according to the application, the first electrical assembly and the second electrical assembly are respectively arranged in different air channels, so that heat generated by the first electrical assembly and the second electrical assembly is isolated from each other, and ventilation and heat dissipation are performed through air flows in the corresponding air channels; the possibility that airflow entering the cabinet body is distributed unevenly due to different heat is reduced, and the heat dissipation effect on the first electrical assembly and the second electrical assembly is improved.

Description

Technical Field

[0001] This application belongs to the field of electrical equipment technology, specifically relating to an electrical cabinet and an AC / DC conversion device. Background Technology

[0002] Most electrical cabinets use direct heat exchange, which means that cold air is drawn in directly from outside the cabinet by a fan to dissipate heat from the heat source inside the cabinet, and then the heated air is exhausted outside the cabinet.

[0003] Because the heat generated by the various components in the electrical cabinet varies during operation, uneven airflow distribution can easily occur when external air enters the cabinet, resulting in poor heat dissipation. Utility Model Content

[0004] The purpose of this utility model is to provide an electrical cabinet to solve the technical problem that uneven airflow distribution inside the cabinet during heat dissipation can easily lead to poor heat dissipation. Another purpose of this application is to provide an AC / DC conversion device.

[0005] Technical solution: The electrical cabinet described in this application embodiment includes a cabinet body, a first electrical component, a first fan, a second electrical component, and a second fan;

[0006] The cabinet is provided with a first air duct, a second air duct, and a first air outlet and a second air outlet connecting the first air duct. The first air duct and the second air duct are independent of each other.

[0007] The first electrical component and the first fan are disposed within the second air duct;

[0008] The second electrical component and the second fan are disposed within the first air duct.

[0009] In some embodiments, the cabinet is provided with a collecting air duct, which is divided into a first chamber and a second chamber. The first chamber is connected to the first air outlet, and the second chamber has an air inlet that is connected to the external environment of the cabinet.

[0010] The second air duct has a third air outlet and a fourth air outlet. The third air outlet is connected to the second chamber, and the fourth air outlet is located on the side of the second air duct away from the second chamber.

[0011] In some embodiments, the cabinet is provided with a plurality of first shells arranged along a first direction, the internal spaces of the plurality of first shells are interconnected, and form the second air duct.

[0012] In some embodiments, the first electrical component further includes a power component and a reactor, the power component being disposed above the reactor along the first direction and connected to at least one of the first housings, the reactor being disposed within at least one of the first housings.

[0013] In some embodiments, the power assembly includes a power module and a heat sink connected to each other, the power module being connected to the outer side wall of the first housing, and the heat sink being disposed inside the first housing.

[0014] In some embodiments, the first fan is located on the side of the power assembly away from the reactor and is disposed within at least one of the first housings.

[0015] In some embodiments, the second electrical component includes a second housing and a capacitor, the interior of the second housing being connected to the first air duct, and the capacitor being disposed within the second housing.

[0016] In some embodiments, a DC circuit breaker, a fuse, and an AC circuit breaker are provided in the first air duct. The capacitor, the DC circuit breaker, and the fuse are arranged sequentially in a first direction. The AC circuit breaker and the DC circuit breaker are respectively provided on both sides of the second air duct along a second direction, and the second direction intersects with the first direction.

[0017] In some embodiments, the cabinet is provided with a plurality of first shells arranged along a first direction, the internal spaces of the plurality of first shells are interconnected, and form a second air duct;

[0018] At least one of the outer surfaces of the first housing is recessed inward to form a guide air duct, the guide air duct is connected to the first air duct and is independent of the second air duct, and the second air outlet is located on the side of the AC circuit breaker away from the second air duct and is connected to the guide air duct.

[0019] In some embodiments, the second fan is disposed opposite to the capacitor.

[0020] In some embodiments, the cabinet has an opening communicating with the interior space on at least one side along the second direction, and the cabinet is hinged to a mounting base, which is disposed within the opening.

[0021] In some embodiments, the first electrical component includes a power component, and the second electrical component includes a capacitor;

[0022] The number of openings is provided in multiples, and they are respectively provided on both sides of the cabinet along the second direction. The mounting bases are correspondingly provided with the openings. The mounting base located on one side of the cabinet is positioned opposite the capacitor, and the mounting base located on the other side of the cabinet is positioned opposite the power component. One of the two mounting bases is used to install the controller, and the other is used to install the terminal block.

[0023] Accordingly, the AC / DC conversion device described in this application includes the electrical cabinet mentioned above.

[0024] Beneficial effects: In the electrical cabinet of this application embodiment, the first electrical component and the second electrical component are respectively placed in different air ducts, so that the heat generated by the first electrical component and the second electrical component are isolated from each other, and each is ventilated and dissipated through the airflow in the corresponding air duct. This reduces the possibility of uneven airflow distribution in the cabinet due to the difference in the amount of heat, and improves the heat dissipation effect on the first electrical component and the second electrical component. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A perspective view of the electrical cabinet provided in the embodiments of this application;

[0027] Figure 2 A cross-sectional view of the electrical cabinet provided in an embodiment of this application;

[0028] Figure 3 A front view of the electrical cabinet provided in an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the structure of the first electrical component provided in an embodiment of this application;

[0030] Figure 5 This is a schematic diagram of the structure of the second electrical component provided in an embodiment of this application;

[0031] Figure 6 This is a schematic diagram of the structure of the mounting base provided in the embodiments of this application;

[0032] Reference numerals: 1. Cabinet; 11. First air duct; 111. First air outlet; 112. Second air outlet; 12. First housing; 121. Second air duct; 122. Third air outlet; 123. Fourth air outlet; 124. Guide air duct; 13. Opening; 14. Mounting base; 141. Support component; 15. Collecting air duct; 151. First chamber; 152. Second chamber; 1521. Air inlet; 16. Partition; 2. First 22. Electrical components; 221. Power modules; 222. Heat sink; 23. Reactor; 3. Second electrical components; 31. Second housing; 310. Receiving cavity; 311. Upper air vent; 312. Lower air vent; 32. Capacitor; 33. DC circuit breaker; 34. Fuse; 35. AC circuit breaker; 4. First fan; 5. Second fan; 6. Third fan; 7. Outer casing; 8. Controller; 9. Terminal block. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0034] In the description of this application, it should be understood that the terms "height," "thickness," "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, and "at least one" can mean one, two, or more, unless otherwise expressly specified.

[0035] It should also be noted that in the accompanying drawings of the embodiments of this application, the arrow marked X represents the first direction X, and the arrow marked Y represents the second direction Y. The first direction X and the second direction Y are introduced to more clearly illustrate the structure and relative positional relationship of each component in the electrical cabinet. In practical applications, the first direction X and the second direction Y may change depending on the arrangement of the electrical cabinet.

[0036] As a preamble to the embodiments of this application, the heat generated by each device in the electrical cabinet during operation is different. For example, the power module and reactor generate relatively more heat, while the capacitor and circuit breaker generate relatively less heat. Areas with high heat may form local pressure and hot air rising, which will cause fluctuations with the airflow entering the cabinet from the outside. On the one hand, this will lead to uneven airflow distribution, and on the other hand, it will carry heat from the high temperature area to the low temperature area, causing interference to the other devices.

[0037] Please combine them together Figure 1 , Figure 2 and Figure 3 The electrical cabinet in this embodiment includes a cabinet body 1, a first electrical component 2, a first fan 4, a second electrical component 3, and a second fan 5. The cabinet body 1 is provided with a first air duct 11, a second air duct 121, and a first air outlet 111 and a second air outlet 112 connecting the first air duct 11. The second air duct 121 is independent of the first air duct 11, that is, they are not interconnected. The cabinet body 1 has a first direction X and a second direction Y. The first direction X is the height direction of the cabinet body 1, and the second direction Y intersects with the first direction X. In the accompanying drawings, solid arrows indicate the airflow path through the first air duct 11, and dashed arrows indicate the airflow path through the second air duct 121.

[0038] The first electrical component 2 and the first fan 4 are disposed within the second air duct 121. It is understood that when the cabinet 1 is not open, its interior is a relatively closed environment, and the second air duct 121 is connected to the external environment of the cabinet 1. The first fan 4 is used to introduce external air into the second air duct 121.

[0039] The second electrical component 3 and the second fan 5 are disposed within the first air duct 11. Both the first air outlet 111 and the second air outlet 112 are connected to the external environment of the cabinet 1. The second fan 5 is used to introduce external air into the first air duct 11. The first air outlet 111 can be an air inlet and the second air outlet 112 can be an air outlet, or the first air outlet 111 can be an air outlet and the second air outlet 112 can be an air inlet.

[0040] The heat generated in the first electrical component 2 and the second electrical component 3 is different. The two are isolated from each other by the independent second air duct 121 and the first air duct 11. On the one hand, this reduces the impact of the area with high heat generation on the airflow, and on the other hand, it limits the transfer of heat between different devices. At the same time, it can also realize independent control and optimization of the airflow in the first air duct 11 and the second air duct 121, which helps to reduce the mutual interference between airflows and improve the heat dissipation effect.

[0041] Please combine them together Figure 1 , Figure 2 and Figure 3In some embodiments, a collecting air duct 15 is provided inside the cabinet 1. The collecting air duct 15 extends along the second direction Y, is located above the first air duct 11 and the second air duct 121, and communicates with the external environment of the cabinet 1. A partition 16 is provided inside the collecting air duct 15, dividing the collecting air duct 15 into a first chamber 151 and a second chamber 152, making the first chamber 151 and the second chamber 152 independent of each other. The first chamber 151 communicates with the first air outlet 111, and the second chamber 152 has an air inlet 1521 that communicates with the external environment of the cabinet 1. The second air duct 121 has a third air outlet 122 and a fourth air outlet 123 arranged opposite each other along the first direction X. The third air outlet 122 communicates with the second chamber 152, and the fourth air outlet 123 is located on the side of the second air duct 121 away from the second chamber 152, that is, at the bottom of the cabinet 1.

[0042] The airflow duct 15 defines the flow path of external air into the cabinet 1. Compared to air entering from different heights within the cabinet 1, this reduces the number of airflow paths and concentrates the airflow in the top space of the cabinet 1. This improves the utilization rate of the internal space of the cabinet 1 and reduces the impact on the layout of internal components. Furthermore, the first chamber 151 and the second chamber 152 separate the airflow drawn by the second fan 5 and the first fan 4 to prevent mutual interference.

[0043] Please combine them together Figure 2 and Figure 3 In some embodiments, the cabinet 1 contains multiple first shells 12 arranged along a first direction X. The internal spaces of the multiple first shells 12 are interconnected, forming a second air duct 121. The first direction X is the height direction of the cabinet 1. The multiple first shells 12 are arranged along the height direction of the cabinet 1, and their internal spaces directly serve as the second air duct 121, eliminating the need for additional air duct structures and fully utilizing the space of the cabinet 1 in the height direction. The second air duct 121 uses a structure composed of multiple shells, making each shell replaceable and allowing it to be disassembled individually without affecting the use of the remaining shells, facilitating maintenance.

[0044] To facilitate the assembly of the first housing 12, a detachable connection structure is used to fix the first housing 12 together. The detachable connection structure can be screws, bolts, clips, pins, etc. At the same time, in order to enhance the sealing between them, sealing strips can be set on the contact surfaces of two adjacent first housings 12.

[0045] Please combine them together Figure 2 and Figure 4In some embodiments, the first electrical component 2 further includes a power component 22 and a reactor 23. The power component 22 is disposed above the reactor 23 along a first direction X and is connected to at least one first housing 12. The reactor 23 is disposed within at least one first housing 12. The specifications of the power component 22, the reactor 23, and the first housing 12 can vary. Therefore, the power component 22 and the reactor 23 may require one or more first housings 12 to meet the installation or housing requirements. In this embodiment, each of the power component 22 and the reactor 23 corresponds to one first housing 12.

[0046] The reactor 23 is relatively heavy and its daily operation frequency is low. Therefore, placing the reactor 23 at the bottom helps to lower the center of gravity of the cabinet 1 and improve the stability of the cabinet 1. At the same time, the power components 22 and the reactor 23 are arranged in the first direction X, with a single path, which facilitates the connection between them, shortens the cable length, and accelerates the airflow to quickly remove heat.

[0047] The airflow within the second air duct 121 directly contacts the reactor 23, absorbing its heat, and simultaneously exchanges heat with the first housing 12 containing the power component 22, carrying away the heat generated by the power component 22. This achieves heat dissipation for both the power component 22 and the reactor 23. Since the power component 22 and the reactor 23 generate relatively high amounts of heat, ventilation and heat dissipation through the second air duct 121 together reduce heat diffusion. Furthermore, the indirect conductive heat dissipation of the power component 22 reduces the possibility of contamination by impurities in the airflow.

[0048] Please combine them together Figure 2 and Figure 4 In some embodiments, the power component 22 includes a power module 221 and a heat sink 222 interconnected. The power module 221 is connected to the outer wall of the first housing 12, and the heat sink 222 is disposed inside the first housing 12 and connected to the inner wall of the first housing 12. The heat sink 222 increases the contact area between the power component 22 and the airflow, thereby improving the heat dissipation efficiency of the power component 22. In addition, in order to both protect the power component 22 and reduce heat diffusion, the power component 22 is provided with an outer cover 7, which is connected to the first housing 12. As an example, the outer cover 7 can be made of materials such as PC (polycarbonate) or metal, and this application does not limit it.

[0049] Please combine them together Figure 1 and Figure 2 In some embodiments, the first fan 4 is located on the side of the power assembly 22 away from the reactor 23 and is disposed within at least one first housing 12. The first fan 4 introduces outside air into the second air duct 121 through the second chamber 152, and the airflow flows through the radiator 222 and the reactor 23 before exiting from the fourth air outlet 123.

[0050] The number of first housings 12 corresponding to the first fan 4 can be matched according to the size of the first fan 4 or the required space of the second air duct 121. There can be one or more, meaning one or more first housings 12 are needed to accommodate the first fan 4. Therefore, one or more first housings 12 can exist between the first housing 12 containing the first fan 4 and the first housing 12 containing the reactor 23 to meet the space requirements of the second air duct 121 or to allow for the disassembly of a single first housing 12. The first housings 12 block the outer perimeter of the first fan 4, forming a relatively enclosed environment, causing the airflow drawn by the first fan 4 to concentrate in the second air duct 121, reducing airflow diffusion. The first fan 4 is positioned above the power component 22, avoiding wiring to the power component 22. In some other embodiments, the first fan 4 can also be positioned below the reactor 23.

[0051] Please refer to Figure 2 In some embodiments, the second electrical component 3 includes a second housing 31 and a capacitor 32. The interior of the second housing 31 is connected to the first air duct 11, and the capacitor 32 is disposed within the second housing 31. Specifically, the second housing 31 has a receiving cavity 310 and an upper air outlet 311 and a lower air outlet 312 communicating with the receiving cavity 310. The receiving cavity 310 is connected to the second air duct 121 through the upper air outlet 311 and the lower air outlet 312, and the capacitor 32 is disposed within the receiving cavity 310. The second housing 31 serves to concentrate and protect the capacitor 32, increasing the integration of the capacitor 32. Furthermore, by concentrating airflow within the second housing 31, the heat dissipation effect of the airflow can be enhanced, and airflow diffusion can be reduced. In addition, the capacitor 32 is disposed opposite to the reactor 23, which can shorten the connection path between the two.

[0052] Please refer to Figure 2 In some embodiments, the second fan 5 is positioned opposite the capacitor 32 so that the airflow drawn by the second fan 5 can flow directly through the capacitor 32, enhancing the heat dissipation effect on the capacitor 32. In this embodiment, the second fan 5 is positioned above the capacitor 32 and is distributed opposite to the upper air outlet 311. The airflow drawn by the second fan 5 enters the receiving cavity 310 through the upper air outlet 311 to exchange heat with the capacitor 32, and flows out through the lower air outlet 312. In other embodiments, if the internal space of the first air duct 11 allows and it does not interfere with the internal components, the second fan 5 can also be positioned at other locations within the first air duct 11. Similarly, the airflow drawn by the second fan 5 can also flow in the opposite direction.

[0053] Please combine them together Figure 2 and Figure 5In some embodiments, a DC circuit breaker 33, a fuse 34, and an AC circuit breaker 35 are disposed within the first air duct 11. The capacitor 32, DC circuit breaker 33, and fuse 34 are arranged sequentially from top to bottom along a first direction X. The AC circuit breaker 35 and DC circuit breaker 33 are respectively disposed on both sides of the second air duct 121 along a second direction Y, which intersects with the first direction X. In the first direction X, the orthogonal projections of the DC circuit breaker 33 and fuse 34 onto the second housing 31 can cover at least a portion of the lower air vent 312; that is, in the first direction X, at least a portion of the lower air vent 312 is directly opposite the DC circuit breaker 33 and fuse 34.

[0054] Capacitor 32, DC circuit breaker 33, and fuse 34 are connected in sequence and arranged in the first direction X, which simplifies the wiring path. Air outside the cabinet 1 can flow through capacitor 32, DC circuit breaker 33, and fuse 34 in sequence, or in reverse; when the airflow in the first air duct 11 flows out from the downvent 312, the relative position of the downvent 312 can guide the airflow through DC circuit breaker 33 and fuse 34, ensuring effective heat dissipation for DC circuit breaker 33 and fuse 34.

[0055] The AC circuit breaker 35 and the reactor 23 are arranged opposite to each other and connected to each other, which simplifies the wiring path. At the same time, the first air duct 11 can form an L-shaped path, which takes into account the heat dissipation of the AC circuit breaker 35 and realizes the layout optimization of the first electrical component 2 and the second electrical component 3 in the cabinet 1.

[0056] Please combine them together Figure 2 , Figure 3 and Figure 5 In some embodiments, the cabinet 1 is provided with a plurality of first housings 12 arranged along the first direction X, the internal spaces of the plurality of first housings 12 are interconnected, and form a second air duct 121.

[0057] At least one of the outer surfaces of the first housing 12 is recessed inward to form a guide air duct 124. The guide air duct 124 extends along the second direction Y. The guide air duct 124 is connected to the first air duct 11 and is independent of the second air duct 121, that is, the guide air duct 124 and the second air duct 121 are not connected to each other. The second air outlet 112 is located on the side of the AC circuit breaker 35 away from the second air duct 121 and is connected to the guide air duct 124 so that the airflow can flow through the guide air duct 124 through the fuse 34 and the AC circuit breaker 35.

[0058] Specifically, the first housing 12 corresponding to the reactor 23 is recessed inward to form a guide air duct 124. The guide air duct 124 and the fourth air outlet 123 are spaced apart and independent of each other. At this time, the second fan 5 introduces external air into the first air duct 11 through the first chamber 151. After the airflow passes through the capacitor 32, it flows out from the lower air outlet 312, and then flows sequentially through the DC circuit breaker 33, the fuse 34, the guide air duct 124 and the AC circuit breaker 35 before being discharged from the second air outlet 112.

[0059] Please refer to Figure 3 In order to enhance the airflow within the first air duct 11, a third fan 6 can be installed within the first air duct 11. The third fan 6 is positioned opposite to the second air outlet 112 and connected to the cabinet 1. The third fan 6 guides the airflow after passing through the fuse 34 to accelerate the airflow and ensure that the airflow is directed to the AC circuit breaker 35.

[0060] Please refer to Figure 6 In some embodiments, the cabinet 1 has an opening 13 communicating with its internal space on at least one side along the second direction Y. A mounting base 14 is hinged to the cabinet 1 and disposed within the opening 13. The mounting base 14 has a hinge axis, which is horizontally positioned and perpendicular to the second direction Y. The mounting base 14 is rotatable about the hinge axis. When the mounting base 14 is in a first position, it is placed along the first direction X. When the mounting base 14 is in a second position, a portion of the mounting base 14 rotates to the outside of the cabinet 1. The mounting base 14 can be used to assemble electrical components and separate them from the existing structure to avoid increasing the load on the existing structure or interfering with the airflow within the duct. Furthermore, due to the hinged arrangement of the mounting base 14, when maintenance of the internal structure of the cabinet 1 is required, the mounting base 14 can be rotated outwards, exposing the internal structure through the opening 13, thus meeting the usage requirements under different working conditions.

[0061] Please combine them together Figure 2 and Figure 6 In some embodiments, the first electrical component 2 includes a power component 22, and the second electrical component 3 includes a capacitor 32. The power component 22 and the capacitor 32 are arranged opposite each other in the second direction Y. Multiple openings 13 are provided, respectively located on both sides of the cabinet 1 along the second direction, with mounting bases 14 corresponding to the openings 13. In the second direction Y, the mounting base 14 on one side of the cabinet 1 is arranged opposite to the capacitor 32, and the mounting base 14 on the other side of the cabinet 1 is arranged opposite to the power component 22. One of the two mounting bases 14 is used to mount the controller 8, and the other is used to mount the terminal block 9. Besides the controller 8 and the terminal block 9, the mounting base 14 can also be used to mount other components. It mainly serves as a mounting platform, therefore the specific types of components are not limited.

[0062] To facilitate personnel operation when the mounting base 14 is opened outward, a support member 141 is provided between the mounting base 14 and the cabinet 1. The support member 141 is configured to fix the mounting base 14 at least when it is rotated to a horizontal position. The support member 141 can be a sliding support, a support block, or other structures. Alternatively, the mounting base 14 can be connected by a friction hinge so that the mounting base 14 can maintain a relative position under multiple angle conditions.

[0063] Accordingly, the AC / DC conversion device provided in this application includes the electrical cabinet in the above embodiments.

[0064] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0065] The electrical cabinets provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An electrical cabinet, characterized in that, It includes a cabinet (1), a first electrical component (2), a first fan (4), a second electrical component (3), and a second fan (5); The cabinet (1) is provided with a first air duct (11), a second air duct (121), and a first air outlet (111) and a second air outlet (112) connecting the first air duct (11). The first air duct (11) and the second air duct (121) are independent of each other. The first electrical component (2) and the first fan (4) are disposed within the second air duct (121); The second electrical component (3) and the second fan (5) are disposed within the first air duct (11).

2. The electrical cabinet according to claim 1, characterized in that, The cabinet (1) is provided with a collection air duct (15), which is divided into a first chamber (151) and a second chamber (152). The first chamber (151) is connected to the first air outlet (111), and the second chamber (152) has an air inlet (1521) that is connected to the external environment of the cabinet (1). The second air duct (121) has a third air outlet (122) and a fourth air outlet (123). The third air outlet (122) is connected to the second chamber (152), and the fourth air outlet (123) is located on the side of the second air duct (121) away from the second chamber (152).

3. The electrical cabinet according to claim 1, characterized in that, The cabinet (1) is provided with a plurality of first shells (12) arranged along the first direction (X), and the internal spaces of the plurality of first shells (12) are interconnected to form the second air duct (121).

4. The electrical cabinet according to claim 3, characterized in that, The first electrical component (2) further includes a power component (22) and a reactor (23), the power component (22) being disposed above the reactor (23) along the first direction (X) and connected to at least one of the first housings (12), the reactor (23) being disposed within at least one of the first housings (12).

5. The electrical cabinet according to claim 4, characterized in that, The power assembly (22) includes a power module (221) and a heat sink (222) connected to each other. The power module (221) is connected to the outer wall of the first housing (12), and the heat sink (222) is disposed inside the first housing (12).

6. The electrical cabinet according to claim 4, characterized in that, The first fan (4) is located on the side of the power assembly (22) away from the reactor (23) and is disposed within at least one of the first housings (12).

7. The electrical cabinet according to any one of claims 1 to 6, characterized in that, The second electrical component (3) includes a second housing (31) and a capacitor (32). The interior of the second housing (31) is connected to the first air duct (11), and the capacitor (32) is disposed inside the second housing (31).

8. The electrical cabinet according to claim 7, characterized in that, The first air duct (11) is equipped with a DC circuit breaker (33), a fuse (34) and an AC circuit breaker (35). The capacitor (32), the DC circuit breaker (33) and the fuse (34) are arranged in sequence in the first direction (X). The AC circuit breaker (35) and the DC circuit breaker (33) are respectively arranged on both sides of the second air duct (121) along the second direction (Y). The second direction (Y) intersects with the first direction (X).

9. The electrical cabinet according to claim 8, characterized in that, In the case where a plurality of first housings (12) are arranged along a first direction (X) inside the cabinet (1), and the internal spaces of the plurality of first housings (12) are interconnected to form a second air duct (121), at least one of the outer surfaces of the first housings (12) is recessed inward to form a guide air duct (124), the guide air duct (124) is connected to the first air duct (11) and is independent of the second air duct (121), and the second air outlet (112) is located on the side of the AC circuit breaker (35) away from the second air duct (121) and is connected to the guide air duct (124).

10. The electrical cabinet according to claim 7, characterized in that, The second fan (5) is positioned opposite to the capacitor (32).

11. The electrical cabinet according to claim 1, characterized in that, The cabinet (1) has an opening (13) communicating with the internal space on at least one side along the second direction (Y), and the cabinet (1) is hinged to a mounting base (14), which is disposed in the opening (13).

12. The electrical cabinet according to claim 11, characterized in that, The first electrical component (2) includes a power component (22), and the second electrical component (3) includes a capacitor (32); The number of openings (13) is provided in multiples, and they are respectively provided on both sides of the cabinet (1) along the second direction. The mounting bases (14) are correspondingly provided with the openings (13). The mounting base (14) located on one side of the cabinet (1) is provided opposite to the capacitor (32), and the mounting base (14) located on the other side of the cabinet (1) is provided opposite to the power component (22). One of the two mounting bases (14) is used to set the controller (8), and the other is used to set the terminal block (9).

13. An AC / DC converter, characterized in that, Includes the electrical cabinet as described in any one of claims 1 to 12.

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