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 which is internally provided with an internal circulation air duct and an external circulation air duct which are independent from each other, and is also provided with a first air port and a second air port which are respectively communicated with the external circulation air duct; the evaporator is arranged in the internal circulation air duct; the condenser is connected with the evaporator, and the condenser is arranged in the outer circulating air duct; the internal circulation air duct and the external circulation air duct which are independent of each other correspond to devices with different heat values, different temperature zones are separated, meanwhile, the internal circulation air duct absorbs internal heat through the evaporator, the external circulation air duct takes away heat through external air, and airflow in the external circulation air duct further dissipates heat of the condenser, so that the heat dissipation efficiency is improved. The number of times that a fan of the condenser needs to be used is reduced, the purpose of heat dissipation of different temperature areas can be achieved through one set of evaporator and condenser, and energy consumption of the electrical cabinet is reduced.

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] Since the heat generated by each component inside the cabinet is different, there will be different temperature zones. In order to achieve temperature control of different temperature zones, air-cooled or water-cooled heat exchangers are usually set up accordingly. Since each heat exchanger needs to be controlled and operated, it is easy to increase the energy consumption of the electrical cabinet. Utility Model Content

[0004] The purpose of this utility model is to provide an electrical cabinet that addresses the technical problem of increased energy consumption due to an increase in the number of heat exchangers. 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:

[0006] The cabinet has an independent internal circulation air duct and an external circulation air duct inside. The cabinet also has a first air outlet and a second air outlet that are respectively connected to the external circulation air duct.

[0007] The evaporator is located within the internal circulation air duct;

[0008] A condenser is connected to the evaporator and is located within the external circulation duct.

[0009] In some embodiments, the external circulation duct includes a heat dissipation duct and a collection duct that are interconnected, and the heat dissipation duct is connected to the second air outlet;

[0010] The air collection duct is connected to the first air outlet, and the condenser is disposed inside the air collection duct.

[0011] In some embodiments, the internal circulation air duct includes a first air duct and a second air duct that are interconnected, and the first air duct and the second air duct are disposed on both sides of the heat dissipation air duct.

[0012] In some embodiments, the electrical cabinet further includes a capacitor assembly, a first circuit breaker, a fuse, and a second circuit breaker. The capacitor assembly, the first circuit breaker, and the fuse are disposed in the first air duct and arranged along a first direction, and the second circuit breaker is disposed in the second air duct.

[0013] In some embodiments, the capacitor assembly is provided with a third air duct, which is connected to the first air duct, and the evaporator is disposed opposite to the air inlet of the third air duct.

[0014] In some embodiments, the electrical cabinet further includes a first fan disposed on one side of the evaporator along a first direction.

[0015] In some embodiments, the electrical cabinet further includes a plurality of first fans, at least one of which is disposed in the first air duct and is disposed on one side of the evaporator along the first direction, and at least another first fan is disposed in the second air duct and is located on one side of the second circuit breaker along the first direction.

[0016] In some embodiments, the heat dissipation duct includes a plurality of housings arranged along a first direction, at least a portion of which are first housings, the plurality of first housings are arranged at intervals, and a first guide channel is formed between two adjacent first housings, the first guide channel connecting the first duct and the second duct.

[0017] In some embodiments, at least one housing is a second housing, and a second air guide channel is provided on the side of the second housing facing the bottom surface of the cabinet. The second air guide channel connects the first air duct and the second air duct, and the second air outlet is connected to the second housing.

[0018] In some embodiments, the electrical cabinet further includes a second fan, which is disposed opposite to the heat dissipation duct, or the second fan is disposed within at least one of the housings.

[0019] Accordingly, the AC / DC conversion device described in the embodiments of this application includes:

[0020] Power components, reactors, and the electrical cabinets mentioned above;

[0021] The power component includes a power module and a heat dissipation module. The power module is disposed on the outer wall of the first housing, and the heat dissipation module is disposed inside the first housing.

[0022] The reactor is housed within the second housing.

[0023] In some embodiments, the power component and / or the reactor has the second fan corresponding to at least one side along the first direction.

[0024] Beneficial effects: The electrical cabinet in this embodiment is equipped with independent internal and external air circulation ducts. The two ducts can each correspond to devices with different heat outputs, realizing the separation of different temperature zones. At the same time, the internal air circulation duct absorbs internal heat through the evaporator, while the external air circulation duct removes heat through external air. Furthermore, the airflow in the external air circulation duct also dissipates heat from the condenser, reducing the number of times the condenser's own fan needs to be used. In this way, different heat dissipation modes can be set according to the heat dissipation and protection requirements of different devices. With just one set of evaporator and condenser, the purpose of heat dissipation for different temperature zones can be achieved, reducing the energy consumption of the electrical cabinet. 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 This is a schematic diagram of the electrical cabinet provided in an embodiment of this application;

[0027] Figure 2 A schematic diagram of an external circulation duct provided in an embodiment of this application;

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

[0029] Figure 4 Right view of the electrical cabinet provided in an embodiment of this application;

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

[0031] Reference numerals: 1. Cabinet; 11. Internal circulation air duct; 111. First air duct; 112. Second air duct; 12. External circulation air duct; 121. Heat dissipation air duct; 1210. Housing; 1211. First housing; 1212. Second housing; 1213. First guide channel; 1214. Second guide channel; 122. Collecting air duct; 13. First air outlet; 14. Second air outlet; 2. Evaporator; 3. Condenser; 4. Capacitor assembly; 40. Third air duct; 401. Air inlet; 402. Air outlet; 41. Capacitor body; 5. First circuit breaker; 6. Fuse; 7. Second circuit breaker; 8. First fan; 9. Power assembly; 91. Power module; 92. Heat dissipation module; 100. Reactor; 200. Second fan; 300. Filter assembly. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] 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, the arrow marked Y represents the second direction Y, and the arrow marked Z represents the third direction Z. The first direction X, the second direction Y, and the third direction Z 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, the second direction Y, and the third direction Z may change depending on the arrangement of the electrical cabinet.

[0035] Please combine them together Figure 1 and Figure 2 The electrical cabinet in this embodiment includes a cabinet body 1, an evaporator 2, and a condenser 3. The cabinet body 1 is equipped with an internal circulation duct 11, an external circulation duct 12, and a first air outlet 13 and a second air outlet 14 respectively connected to the external circulation duct 12. The internal circulation duct 11 and the external circulation duct 12 are independently configured, meaning they are not interconnected. However, it is understood that both the internal circulation duct 11 and the external circulation duct 12 can achieve airflow within them. In the accompanying drawings, solid arrows represent the airflow path of the internal circulation duct 11, and dashed arrows represent the airflow path of the external circulation duct 12.

[0036] Evaporator 2 is located in the internal circulation duct 11 and is used to absorb heat from the internal circulation duct 11. Condenser 3 is located in the external circulation duct 12 and is connected to evaporator 2 through a pipe. Condenser 3 is used to release the heat absorbed by evaporator 2 to the external environment. Evaporator 2 and condenser 3 can be tube-fin heat exchangers or parallel flow heat exchangers.

[0037] In this embodiment, the inner circulation duct 11 corresponds to devices with relatively low heat generation and relatively high protection requirements, while the outer circulation duct 12 corresponds to devices with relatively high heat generation. The devices within the cabinet 1 are separated by the independent inner and outer circulation ducts 11 and 12. The evaporator 2 removes heat from the inner circulation duct 11, maintaining a relatively stable temperature range within it. The airflow in the outer circulation duct 12 flows through the condenser 3, exchanging heat with it, and also ventilates and dissipates heat from the devices within the outer circulation duct 12. Since the devices in the outer circulation duct 12 generate relatively more heat, they can still exchange heat with the airflow. Thus, a single evaporator 2 and condenser 3 achieve heat dissipation for different temperature zones. Simultaneously, the airflow in the outer circulation duct 12 directly carries away heat from the condenser 3, reducing the number of times the condenser 3 needs to use its own fan to enhance airflow and exchange heat with the surrounding air, thereby reducing the energy consumption of the electrical cabinet. In addition, due to the protection requirements of the components in the internal circulation duct 11, the internal circulation duct 11 is in a relatively closed environment, which can reduce the heat from the external environment entering it, thereby improving the heat exchange efficiency of the evaporator 2.

[0038] Please refer to Figure 2 In some embodiments, the external circulation duct 12 includes a heat dissipation duct 121 and a collection duct 122 that are interconnected. The heat dissipation duct 121 is connected to the second air outlet 14, and the collection duct 122 is connected to the first air outlet 13. The condenser 3 is disposed in the collection duct 122.

[0039] In this embodiment, the heat dissipation duct 121 extends along a first direction X, which is the height direction of the cabinet 1. The collecting duct 122 extends along a second direction Y, which intersects with the first direction X, i.e., the second direction Y and the first direction X are set at an angle of 85°-95°, preferably 90°. There are at least two first air vents 13, located at opposite ends of the collecting duct 122 along the second direction Y. The condenser 3 is staggered from the heat dissipation duct 121 in the second direction Y to avoid obstructing the heat dissipation duct 121. The heat dissipation duct 121 is used to accommodate devices with relatively high heat generation. The collecting duct 122 is mainly used to introduce air from outside the cabinet 1, increasing the airflow through a separate duct so that the airflow can fully exchange heat with the devices after entering the heat dissipation duct 121, thus improving the heat dissipation effect.

[0040] Please combine them together Figure 1 and Figure 2In some embodiments, the internal circulation air duct 11 includes a first air duct 111 and a second air duct 112 that are interconnected. The first air duct 111 and the second air duct 112 are respectively disposed on both sides of the heat dissipation air duct 121 along the second direction Y. The first air duct 111 and the second air duct 112 can be connected inside the cabinet 1 or through an air duct structure outside the cabinet 1.

[0041] The internal circulation air duct 11 is arranged around the heat dissipation air duct 121, making full use of the space of the cabinet 1 in the second direction Y. On the one hand, it can improve the uniformity of heat dissipation, and on the other hand, it can distribute the components into the first air duct 111 and the second air duct 112, reduce the resistance to airflow, and enable the airflow to cover different areas inside the electrical cabinet, increasing the flexibility of heat dissipation to adapt to different cooling requirements and the layout of components inside the electrical cabinet.

[0042] Please combine them together Figure 1 and Figure 3 In some embodiments, the electrical cabinet further includes a capacitor assembly 4, a first circuit breaker 5, a fuse 6, and a second circuit breaker 7. The capacitor assembly 4, the first circuit breaker 5, and the fuse 6 are disposed within the first air duct 111 and arranged sequentially from top to bottom along the first direction X. The second circuit breaker is disposed within the second air duct. The first circuit breaker 5 is a DC circuit breaker, and the second circuit breaker 7 is an AC circuit breaker. The capacitor assembly 4, the first circuit breaker 5, and the fuse 6 are connected sequentially and arranged neatly, facilitating wiring and reducing the airflow frontal area, allowing for rapid airflow to remove heat. The second circuit breaker 7 and the first circuit breaker 5 are located in two separate air ducts, maximizing their respective heat dissipation effects and reducing electromagnetic interference through spatial separation, thus improving system stability. Furthermore, during routine maintenance, they provide convenient and flexible operating space for individual maintenance of either the DC or AC circuit breaker.

[0043] Please refer to Figure 1 In some embodiments, the capacitor assembly 4 is provided with a third air duct 40 extending along the first direction X. The third air duct 40 is connected to the first air duct 111. The third air duct 40 has an air inlet 401 and an air outlet 402 connected thereto. The evaporator 2 is disposed opposite to the air inlet 401 of the third air duct 40.

[0044] In this embodiment, the capacitor assembly 4 includes an electrical cover and a capacitor body 41 disposed inside the electrical cover. The electrical cover is connected to the cabinet 1. The interior of the electrical cover is a third air duct 40. The air inlet 401 is located above the air outlet 402. That is, the evaporator 2 is disposed on the side of the capacitor assembly 4 away from the first circuit breaker 55. The air inlet 401 is disposed opposite to the evaporator 2, and the air outlet 402 is disposed opposite to the first circuit breaker 5, so as to ensure that the airflow from the air outlet 402 flows through the first circuit breaker 5.

[0045] The airflow cooled by the evaporator 2 enters the third air duct 40 and directly exchanges heat with the capacitor body 41, enhancing the heat dissipation effect on the capacitor body 41. At the same time, the air density after absorbing heat in the evaporator 2 is relatively large compared to hot air, so it will naturally sink under the action of gravity, which helps to reduce the flow resistance of the airflow.

[0046] Please refer to Figure 1 In some embodiments, the electrical cabinet further includes a first fan 8, which is disposed on one side of the evaporator 2 along a first direction. The first fan 8 can be disposed above or below the evaporator 2 so that the two are close to each other, allowing air to flow smoothly through the evaporator 2 for heat exchange.

[0047] Please refer to Figure 1 In some embodiments, the electrical cabinet further includes multiple first fans 8. At least one first fan 8 is disposed within the first air duct 111 and is located on one side of the evaporator 2 along the first direction X. At least another first fan 8 is disposed within the second air duct 112 and is located on one side of the second circuit breaker 7 along the first direction X. The number of first fans 8 in the first air duct 111 and the second air duct 112 can be one or more, depending on factors such as the size of the space in the first air duct 111 and the second air duct 112, the required airflow, the device density, and energy consumption. It is sufficient that the airflow can form a complete cycle and that the circulating airflow path flows sequentially through the devices in the first air duct 111 and the second air duct 112. Therefore, the number of first fans 8 is not specifically limited.

[0048] In this embodiment, the first fan 8 has an axis parallel to the first direction X. The first fan 8 within the first air duct 111 is positioned between the evaporator 2 and the capacitor assembly 4, drawing air downwards. The first fan 8 within the second air duct 112 is positioned above the second circuit breaker 7, drawing air upwards. The first air duct 111 and the second air duct 112 are interconnected in the second direction Y, thus forming an airflow circulation. The first fan 8 within the first air duct 111 is located below the evaporator 2, allowing for efficient utilization of the cold air generated by the evaporator 2, which then directly enters the first air duct 111 to cool the devices. Simultaneously, due to the higher density of cold air, it naturally sinks, while the lower density of hot air naturally rises. The arrangement of the two first fans 8, one above the other, aligns with the natural convection direction; that is, the first air duct 111 blows cold air downwards, and the second fan 200 blows hot air upwards. This arrangement enhances the airflow circulation effect through natural convection, reducing the energy consumption of the first fan 8.

[0049] Please combine them together Figure 2 and Figure 4In some embodiments, the heat dissipation duct 121 includes a plurality of housings 1210 arranged along the first direction X. It is understood that the plurality of housings 1210 arranged along the first direction X means that the overall arrangement of the plurality of housings 1210 is parallel to the first direction X, and does not simply mean that the housings 1210 are arranged in a straight line in the first direction X.

[0050] At least part of the housing 1210 is a first housing 1211. Multiple first housings 1211 are arranged at intervals along a third direction Z. The third direction Z intersects with the first direction X and the second direction Y. A first guide channel 1213 is formed between two adjacent first housings 1211. The first guide channel 1213 connects the first air duct 111 and the second air duct 112.

[0051] In this embodiment, the two adjacent housings 1210 are fixed by a detachable connection structure, which can be screws, bolts, clips, pins, etc. In order to enhance the sealing between them, a sealing strip can be provided on the contact surface of the two adjacent housings 1210.

[0052] The heat dissipation duct 121 adopts a spliced ​​structure composed of multiple shells 1210. By increasing or decreasing the number of shells 1210, the length of the heat dissipation duct 121 can be adjusted, which is convenient and flexible, improving the structural utilization rate and allowing the first shell 1211 to be disassembled separately for easy maintenance. The airflow in the heat dissipation duct 121 can also transfer heat with the air in the internal circulation duct 11 through the shells 1210, thereby enhancing the heat exchange efficiency.

[0053] Please combine them together Figure 2 , Figure 4 and Figure 5 In some embodiments, at least one housing 1210 is a second housing 1212. The second housing 1212 is provided with a second air guide channel 1214 on the side facing the bottom of the cabinet 1. The second air guide channel 1214 is located below the first air guide channel 1213 and connects the first air duct 111 and the second air duct 112. The second air outlet 14 is connected to the second housing 1212.

[0054] The airflow in the heat dissipation duct 121 flows downward through the first housing 1211 and the second housing 1212 in sequence, and is discharged from the second air outlet 14. This makes full use of the structural characteristics of the second housing 1212, which helps to improve the overall space utilization and layout rationality of the electrical cabinet.

[0055] Please refer to Figure 2 In some embodiments, the electrical cabinet also includes a second fan 200, which is disposed opposite to the heat dissipation duct 121, that is, the second fan 200 is independent of the heat dissipation duct 121 and corresponds to the air inlet of the heat dissipation duct 121.

[0056] Alternatively, the electrical cabinet may also include a second fan 200, which is disposed within at least one housing 1210. In this case, the housing 1210 can concentrate the airflow and reduce the diffusion of the airflow.

[0057] Please combine them together Figure 2 and Figure 4 Accordingly, the AC / DC conversion device provided in this application includes a power component 9, a reactor 100, and the electrical cabinet in the above embodiment.

[0058] The power assembly 9 includes a power module 91 and a heat dissipation module 92. The power module 91 is disposed on the outer wall of the first housing 1211, and the heat dissipation module 92 is disposed inside the first housing 1211 and connected to the inner wall of the first housing 1211. The heat dissipation module 92 can be a finned heat sink. The reactor 100 is disposed inside the second housing 1212 and is arranged at intervals from the power module 91 along the first direction X. The power module 91 and the first capacitor assembly 4 are arranged opposite each other along the second direction Y, and the reactor 100 and the second circuit breaker 7 are arranged opposite each other along the second direction Y.

[0059] The heat dissipation module 92 increases the contact area between the power module 91 and the airflow, thereby improving the heat dissipation efficiency of the power module 91. The capacitor assembly 4, power assembly 9, reactor 100 and second circuit breaker 7 are connected in sequence, and their positions are arranged in a directional and regular manner, which can shorten the current flow path and reduce losses. At the same time, the reactor 100 is placed below the power assembly 9 to lower the center of gravity and improve stability.

[0060] Furthermore, the reactor 100 is housed separately within a second housing 1212, allowing the second housing 1212 to be disassembled and removed independently during maintenance without affecting other components. This simplifies the maintenance process. Additionally, the detachable connection of the housing 1210 allows for independent operation and replacement of each component, and facilitates the expansion of the entire electrical cabinet. In other embodiments, if the dimensions of the reactor 100 and the second housing 1212 are incompatible, multiple second housings 1212 can be joined together to create a larger internal space to accommodate the reactor 100.

[0061] Please combine them together Figure 2 and Figure 4In some embodiments, a second fan 200 is positioned on at least one side of the power component 9 and / or reactor 100 along the first direction X. In this embodiment, the second air outlet 14 is located below the reactor 100, and the second fan 200 is located above the power component 9. In this case, the second fan 200 corresponds to the collecting air duct 122, enabling it to quickly introduce cold air from the collecting air duct 122 into the heat dissipation air duct 121. Combined with the arrangement of the power component 9 and reactor 100 along the first direction X, the single path reduces airflow obstruction. In other embodiments, the second fan 200 may also be located below the reactor 100, or between the power component 9 and reactor 100. Multiple second fans 200 may also be provided, each corresponding to a power component 9 and a reactor 100, to enhance airflow.

[0062] Please refer to Figure 1 In some embodiments, the electrical cabinet further includes a filter assembly 300, which is disposed within the first air vent 13 and connected to the cabinet body 1. The filter assembly 300 includes at least one of a filter screen and louvers. The filter assembly 300 covers the first air vent 13 to prevent foreign objects in the outside air of the cabinet body 1 from entering the external circulation air duct 12, thereby improving the protection level and electrical safety of the electrical cabinet.

[0063] 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.

[0064] 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, include: The cabinet (1) has an internal circulation air duct (11) and an external circulation air duct (12) that are independent of each other. The cabinet (1) also has a first air outlet (13) and a second air outlet (14) that are respectively connected to the external circulation air duct (12). An evaporator (2) is installed inside the internal circulation duct (11); A condenser (3) is connected to the evaporator (2), and the condenser (3) is located in the external circulation duct (12).

2. The electrical cabinet according to claim 1, characterized in that, The external circulation air duct (12) includes a heat dissipation air duct (121) and a collection air duct (122) that are interconnected. The heat dissipation air duct (121) is connected to the second air outlet (14). The air collection duct (122) is connected to the first air outlet (13), and the condenser (3) is disposed in the air collection duct (122).

3. The electrical cabinet according to claim 2, characterized in that, The internal circulation air duct (11) includes a first air duct (111) and a second air duct (112) that are interconnected, and the first air duct (111) and the second air duct (112) are disposed on both sides of the heat dissipation air duct (121).

4. The electrical cabinet according to claim 3, characterized in that, The electrical cabinet also includes a capacitor assembly (4), a first circuit breaker (5), a fuse (6), and a second circuit breaker (7). The capacitor assembly (4), the first circuit breaker (5), and the fuse (6) are disposed in the first air duct (111) and arranged along the first direction (X). The second circuit breaker (7) is disposed in the second air duct (112).

5. The electrical cabinet according to claim 4, characterized in that, The capacitor assembly (4) is provided with a third air duct (40), which is connected to the first air duct (111). The evaporator (2) is arranged opposite to the air inlet (401) of the third air duct (40).

6. The electrical cabinet according to claim 4, characterized in that, The electrical cabinet also includes a first fan (8), which is located on one side of the evaporator (2) along a first direction (X).

7. The electrical cabinet according to claim 4, characterized in that, The electrical cabinet also includes a plurality of first fans (8), at least one of the first fans (8) is disposed in the first air duct (111) and the first fan (8) is disposed on one side of the evaporator (2) along the first direction (X), and at least another first fan (8) is disposed in the second air duct (112) and located on one side of the second circuit breaker (7) along the first direction (X).

8. The electrical cabinet according to claim 3, characterized in that, The heat dissipation duct (121) includes a plurality of housings (1210) arranged along a first direction (X), at least a portion of the housings (1210) being first housings (1211), the plurality of first housings (1211) being arranged at intervals, and a first guide channel (1213) being formed between two adjacent first housings (1211), the first guide channel (1213) connecting the first air duct (111) and the second air duct (112).

9. The electrical cabinet according to claim 8, characterized in that, At least one housing (1210) is a second housing (1212). The second housing (1212) has a second air guide channel (1214) on the side facing the bottom of the cabinet (1). The second air guide channel (1214) connects the first air duct (111) and the second air duct (112). The second air outlet (14) is connected to the second housing (1212).

10. The electrical cabinet according to claim 8 or 9, characterized in that, The electrical cabinet also includes a second fan (200), which is disposed opposite to the heat dissipation duct (121), or the second fan (200) is disposed within at least one of the housings (1210).

11. An AC / DC converter, characterized in that, include: The power assembly (9), the reactor (100), and the electrical cabinet as described in any one of claims 1 to 10; The power component (9) includes a power module (91) and a heat dissipation module (92). The power module (91) is disposed on the outer wall of the first housing (1211), and the heat dissipation module (92) is disposed inside the first housing (1211). The reactor (100) is disposed inside the second housing (1212).

12. The AC / DC converter according to claim 11, characterized in that, The power component (9) and / or the reactor (100) have a second fan (200) corresponding to at least one side along the first direction (X).

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