CN117460218A - A power cabinet - Google Patents

Abstract

The invention discloses a power cabinet, which comprises a cabinet body and a first heating element, wherein a heat dissipation cavity is arranged at the bottom of the cabinet body, a first air inlet and a first air outlet are arranged at the side part of the heat dissipation cavity, the first air inlet and the first air outlet are communicated to form a first air channel, the first air inlet is higher than the first air outlet and far away from the ground, the first air channel is provided with a vertically extending accommodating section and an air passing section communicated with the first air inlet and the input end of the accommodating section, and the air passing section is only used for passing air; the first heating element extends along the vertical direction, is arranged in the accommodating section of the first air duct and forms an air passing gap with the air duct wall of the first air duct, and the top end of the first heating element is not higher than the input end of the accommodating section so as to allow the air flow of the first air inlet to take away the heat of the first heating element from top to bottom. The first radiating efficiency that generates heat of piece of this application is high, and is difficult for producing harmful effects or producing harmful effects to the power cabinet air inlet of low reaches to the air inlet of cabinet body in the radiating cavity top.

Description

A power cabinet

Technical field

The invention relates to the technical field of power equipment, and in particular to a power cabinet.

Background technique

Power cabinets such as photovoltaic inverters and energy storage converter cabinets usually include reactors. Reactors have high heat dissipation requirements and due to their heavy weight, they are generally placed at the bottom of the power cabinet. The power cabinet is generally It is used together with multiple power cabinets. Several power cabinets are combined to form a power group. Multiple power groups are arranged side by side. The heat dissipation method of reactors in existing power cabinets is mostly air-cooled heat dissipation. For example, in patent CN111465289A, see Figure 1. The reactance module 8 is placed at the bottom of the cabinet, and the reactance module 8 is placed directly below the air inlet of the first air duct 24. The cold air flows through the reactance module 8 to take away the heat, and then is discharged from the cabinet 1 through the first air duct 24. In this solution, The first air duct 24 for dissipating heat of the reactance module 8 extends into the main protection area, occupying the space of the main protection area, and makes the DC isolation switch (left part in Figure 1) and capacitor bus on both sides of the first air duct 24 The connection of the exhaust module (right part in Figure 1) is inconvenient, and since the air duct wall of the first air duct 24 can be made of sheet metal parts with good thermal conductivity, the sealing level is poor, which not only leaks air, but also causes the heat of the reactor 8 to It will be radiated into the main protection area through the wall of the first air duct 24, thereby increasing the temperature of the main protection area 2. In addition, the power cabinet may be used outdoors. The outdoor ground temperature is sometimes higher, so the cold air entering from the bottom may be higher. This heat dissipation method is likely to cause the hot air from the ground to enter the reactor, reducing the reactor's heat dissipation efficiency. Poor.

Contents of the invention

The object of the present invention is to overcome the above-mentioned defects or problems existing in the background technology and provide a power cabinet whose first heating element has high heat dissipation efficiency and is not easy to affect the air inlet of the cabinet above the heat dissipation cavity or the downstream power cabinet. Intake of air will have adverse effects.

In order to achieve the above objects, the present invention and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

Technical solution 1 is a power cabinet, which includes a cabinet with a heat dissipation cavity at the bottom. A first air inlet and a first air outlet are provided on the side of the heat dissipation cavity. The first air inlet and the first air outlet are The first air inlet is connected to form a first air duct, and the first air inlet is higher than the first air outlet and away from the ground. The first air duct has a vertically extending accommodation section and a space connecting the first air inlet and the container. The air passage section is located at the input end of the section, and the air passage section is only used for air passage; and the first heating element extends in the vertical direction, and is placed in the accommodation section of the first air duct and connected with the first heating element. A wind gap is formed between the air duct walls of an air duct, the top of which is no higher than the input end of the accommodating section to allow the air flow from the first air inlet to take away the heat of the first heating element from top to bottom.

Based on the technical solution 1, a technical solution 2 is also provided. In the technical solution 2, a second heating element that generates less heat than the first heating element is also provided; the side of the heat dissipation cavity is also provided with a second heating element located on the same surface as the first air inlet. a second air inlet and a second air outlet, the second air inlet and the second air outlet are connected to form a second air duct, and both are located between the first air inlet and the first air outlet, and the second air inlet and the second air outlet are connected to form a second air duct. The air inlet is higher than the second air outlet; the first air duct is at least partially located in the second air duct; the second heating element is placed in the heat dissipation cavity and at least partially located in the second air duct.

Based on the second technical solution, there is also a technical solution three. In the third technical solution, the air volume of the first air inlet is greater than the air volume of the second air inlet, and the heat dissipation cavity is provided with first parallel and opposite first air inlets along the first direction. On the side wall and the second side wall, the first air inlet and the second air inlet are located on the first side wall, and the first air outlet and the second air outlet are located on the second side wall.

Based on the technical solution three, there is also a technical solution four. In the technical solution four, an inner partition is provided in the heat dissipation cavity between the first air outlet and the second air outlet to separate the heat dissipation cavity from the first air inlet. , an upper air outlet chamber corresponding to the second air inlet and the second air outlet, and a lower air outlet chamber corresponding to the first air outlet; the inner partition is provided with an air flow port connecting the first air inlet and the first air outlet. , the air flow port forms the output end of the accommodation section of the first air duct, and another part of the first air duct is formed between the air flow port and the first air outlet; the first heating element is located at the The upper air outlet chamber; the portion of the upper air outlet chamber outside the first air duct forms the second air duct.

Based on technical solution four, there is also technical solution five. In technical solution five, the cabinet is provided with first and second abutment walls that are parallel and opposite to each other along a second direction perpendicular to the first direction. The lower air outlet chamber also forms third air outlets and fourth air outlets on the first abutting wall and the second abutting wall that are connected with the air flow openings.

Based on the technical solution five, there is also a technical solution six. In the technical solution six, the cabinet is provided with a cover body, one end of the cover body is connected to the first air inlet, and the other end is connected to the air outlet; the cover body is connected along the second The projection of the direction is L-shaped and is provided with a horizontal section and a vertical section. The horizontal section forms the wind passage section of the first air duct, and the vertical section forms the accommodation section of the first air duct.

Based on technical solution six, there is also technical solution seven. In technical solution seven, air gaps are formed between the cover body and the first abutment wall and the second abutment wall; the heat dissipation cavity is away from the second side wall. The inner surface is provided with an air guide surface facing the cover body and parallel to the first side wall. A wind gap is formed between the air guide surface and the cover body and is spaced vertically from the inner partition.

Based on the seventh technical solution, there is also a technical solution eight. In the eighth technical solution, there is a heat insulation gap between the top surface of the cover and the cavity wall of the heat dissipation cavity.

Based on the eighth technical solution, there is also a technical solution nine. In the technical solution nine, the second heating element includes a fuse, a first connector and a second connector, and the fuse and the first connector are located on the third A heating element is located on one side of the first side wall close to the first side wall along the second direction, and the second connector is located on the other side of the first heating element close to the second side wall along the second direction; the fuse is close to the second side wall. In the air inlet, the first connector is located below the fuse; the first connector and the second connector extend through the inner partition into the lower air outlet chamber.

Based on technical solution nine, there is also technical solution ten. In technical solution ten, the cabinet includes a fan module; the fan module is installed on the first side wall and used to send air to the first air inlet and the second air inlet. The air supply volume to the first air inlet is greater than the air supply volume to the second air inlet.

From the above description of the present invention and its preferred embodiments, it can be seen that compared with the existing technology, the technical solution of the present invention and its preferred embodiments have the following beneficial effects by adopting the following technical means:

The applicant has learned through continuous observation, experimentation and research that the technical problem of "low heat dissipation efficiency of the first heating component and interference with other electrical components" in the existing technical solution is due to the following points. First, it is used for the second heating component. The air flow used to dissipate heat from a heating component may be hot air from the ground; secondly, the hot air flowing through the first heating component may interfere with other electrical components through radiation or other means.

In the first technical solution, the "ground" should be understood as the supporting surface of the power cabinet; the air passage section is only used for passing the wind, which means that no other heating components will be placed in the air passing section; the "wind gap" should be understood as being only used for passing the wind. Do not place other heating components in the air gap.

The first air inlet is higher than the first air outlet and away from the ground, the first heating element extends in the vertical direction and is placed in the accommodation section of the first air duct and forms a wind gap with the air duct wall of the first air duct, Its top is not higher than the input end of the accommodation section to allow the air flow from the first air inlet to take away the heat of the first heating element from top to bottom. On the one hand, it keeps the first air inlet away from the ground, thus preventing entry when the ground temperature is high. The air flow in the first air duct is hot air, which ensures that the air flow entering the first air duct is cold air away from the ground. Since the air passing section is only used for passing wind, there is a gap between the first heating element and the air duct wall of the first air duct. The wind gap is formed, and the heat of the first heating element is relatively concentrated. Therefore, the cold air flow from the first air inlet flows directly to the first heating element, and takes away the heat of the first heating element from top to bottom. When the air flow flows into the wind gap, the flow rate is is faster, so the air flow can quickly take away the heat of the first heating element, and the heat dissipation efficiency of the first heating element is high; on the other hand, because the first air outlet is closer to the ground, and because the first air outlet is lower, the first air outlet When the hot air comes out and moves upward, the movement trajectory is basically parabolic. This not only prevents the cabinet from opening an air inlet above the heat dissipation cavity on the same surface as the first air outlet, but also prevents the hot air from entering the air inlet and affecting the heat dissipation. It also allows multiple power cabinets to When used side by side in the horizontal direction, it is not easy to affect the air inlet of the adjacent power cabinet downstream; in addition, the first heating element is located in an independent heat dissipation cavity, and the hot air flowing through the first heating element is directly discharged without interfering with other electrical appliances. pieces. It can be seen that in this technical solution, the cold air temperature of the first heating element is low and the heat dissipation efficiency is high. At the same time, the hot air of the first heating element, that is, the hot air of the first air outlet, is as close to the ground as possible to avoid damaging the cabinet above the heat dissipation cavity. The first air outlet is located on the same surface as the air inlet or affects the downstream power cabinet.

In the second technical solution, the second air inlet and the first air inlet are located on the same surface, so that the air inlets of the cabinet are relatively concentrated, which is conducive to the overall layout design of the cabinet, especially when multiple power cabinets are used side by side in the horizontal direction; The second heating element is at least partially located in the second air duct. Since the second air inlet and the second air outlet are both located between the first air inlet and the first air outlet, and the second air inlet is higher than the second air outlet, therefore, The first air inlet is further away from the ground than the second air inlet, the second air outlet is further away from the ground than the first air outlet, the air inlet temperature of the first air inlet is lower than the temperature of the second air inlet, the first air outlet The air outlet temperature of the air outlet is higher than the air outlet temperature of the second air outlet. In this way, the cooler air flow can dissipate heat for the first heating element, the second colder air flow can dissipate heat for the second heating element, and the hotter air flow is closer to the ground. The secondary heat air flow is away from the ground. When the calorific value of the first heating element is greater than the calorific value of the second heating element, this arrangement allows the first heating element and the second heating element to have high heat dissipation efficiency at the same time. At the same time, due to the The hot air from the first air outlet is hotter than the hot air from the second air outlet, which also allows the hot air from the second air outlet to flow upward with the hot air from the first air outlet. The hot air is located at the bottom of the cabinet, which prevents the hot air from flowing into the first air outlet and the second air outlet when the cabinet has an air inlet above the heat dissipation cavity on the same surface as the first air outlet and the second air outlet. This also makes it difficult to affect the air inlet of the downstream adjacent power cabinet when multiple power cabinets are used side by side in the horizontal direction; wherein, the second heating element is at least partially located in the second air duct, and the second heating element can pass through the second The air duct dissipates heat with high heat dissipation efficiency. Since the heat dissipation of the second heating element is low, during the heat dissipation process, the second air duct can also take away the heat of the first air duct, thereby further improving the heat dissipation efficiency of the first heating element. . The first heating element and the second heating element are located in independent heat dissipation cavities, and the hot air flowing through the first heating element and the second heating element is directly discharged without disturbing other electrical components.

In the third technical solution, the side walls of the cabinets other than the first side wall and the second side wall do not require air inlet or outlet, and do not require maintenance. Therefore, the side walls can be used to combine cabinets with other cabinets or along the first vertical and horizontal side walls. Used side by side at intervals in the direction, it will not affect the work, heat dissipation and maintenance of the power cabinet itself; on the basis that the cold air temperature of the first air inlet is lower than the cold air temperature of the second air inlet, the air volume of the first air inlet is greater than that of the second air inlet. The air volume of the air inlet, on the one hand, further enables the first heating element to have higher heat dissipation efficiency, and the heat radiation to the second heating element is smaller, so the second heating element has higher heat dissipation efficiency; on the other hand, it also makes the second heating element have higher heat dissipation efficiency. The air volume of the first air outlet is also greater than the air volume of the second air outlet, so that the hot air from the first air outlet can also carry the hot air from the second air outlet in a parabolic trajectory, away from other air inlets above the heat dissipation cavity or downstream power cabinets. air inlet; placing the second heating element that generates less heat in the second air duct with smaller air volume not only meets the heat dissipation needs of the second heating element, but also assists in heat dissipation for the first heating element.

In the fourth technical solution, the first air duct is formed of upper and lower parts, and the first heating element is located in the upper air outlet chamber, so that the lower air outlet chamber is separated between the first heating element and the ground, preventing the first heating element from being heated by the ground. The influence of radiation is beneficial to make the first air outlet located at the bottom of the heat dissipation cavity.

In the fifth technical solution, the lower air outlet chamber also forms a third air outlet and a fourth air outlet connected with the air outlet on the first abutting wall and the second abutting wall, so that the hot air flowing through the first heating element can pass through The flow out of the first air outlet can also flow out through the third air outlet and the fourth air outlet, thereby reducing the amount of hot air from the first air outlet and making it less likely to cause damage to the first air inlet and second air inlet of the downstream power cabinet. interference; it should be understood that both the first abutting wall and the second abutting wall are suitable for use when combined with other power cabinets. When multiple power cabinets are combined along the second direction to form a power group, only the outermost third The third and fourth air outlets of the power cabinet in the middle will blow out air, but the third and fourth air outlets of the power cabinet in the middle will not blow out the air due to the high wind pressure of the adjacent power cabinet.

In the sixth technical solution, the cabinet is provided with a cover to ensure the formation of the air passage section and the accommodation section of the first air duct.

In the seventh technical solution, an air gap is formed between the cover body and the first abutting wall and the second abutting wall, which is beneficial to the cold air flow from the second air inlet increasing when it passes outside the cover body, and the cold air flow flows to the guide The back of the wind surface collides with the air guide surface, and the flow speed further increases. The air flow colliding with the air guide surface flows downward along the outside of the cover body, thereby taking away the heat radiated from the first heating element to the cover body, further improving the efficiency of the second heat-generating element. The heat dissipation efficiency of a heating element; since the air guide surface is vertically spaced from the inner partition, the air flow that does not collide with the air guide surface continues to flow to the second air outlet.

In the eighth technical solution, there is a heat insulation gap between the top surface of the cover body and the cavity wall of the heat dissipation cavity. This heat insulation gap cooperates with the air gap between the cover body and the air guide surface, so that the heat of the first heating element is It is not easy to transfer upward through heat radiation, further avoiding the impact on other electrical components.

In the ninth technical solution, since the heat generated by the fuse is greater than that of the first connector and the second connector, the temperature resistance of the fuse is lower than that of the first connector and the second connector, and the fuse and the first connector are close to the first connector. On the side wall, the second connector is close to the second side wall, ensuring the heat dissipation of the fuse, and making the first connector and the second connector close to the first side wall and the second side wall respectively, which is conducive to external wiring; fuse The fuse is close to the second air inlet, and the first connector is located below the fuse, which is conducive to wiring and heat dissipation; the first connector and the second connector penetrate the inner partition and extend into the lower air outlet chamber, which is conducive to wiring operations.

In the tenth technical solution, the fan module is installed on the first side wall. Compared with the installation on the second side wall, the temperature of the fan module is not very high, so that the fan module is not easily damaged.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the drawings needed to be used in the description of the embodiments are briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the field, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of the prior art;

Figure 2 is a schematic diagram of a power cabinet according to an embodiment of the present invention;

Figure 3 is a schematic diagram two of the power cabinet according to the embodiment of the present invention;

Figure 4 is a top view of the power cabinet according to the embodiment of the present invention after the cabinet top plate is hidden;

Figure 5 is an internal schematic diagram of the power cabinet according to the embodiment of the present invention;

Figure 6 is an internal schematic diagram of the hidden part of the cover of the power cabinet according to the embodiment of the present invention.

Explanation of main reference symbols:

Cabinet 10; air passage chamber 10A; air exhaust outlet 101; protective chamber 10B; heat dissipation chamber 10C; upper air outlet chamber 10D; lower air outlet chamber 10F; first air duct 01; second air duct 02; first side wall 11; main air inlet 111; first air inlet 112; second air inlet 113; second side wall 12; first air outlet 121; second air outlet 122; third air inlet 123; first abutting wall 13; The first air inlet 131; the third air outlet 132; the second abutment wall 14; the second air inlet 141; the fourth air outlet 142; the support plate 15; the air outlet 151; the partition plate 16; the air guide surface 161 ; Inner partition 17; Air flow port 171; Cover body 18; Fan module 19; First fan 191; Second fan 192; Insulation gap 03; Heat exchange device 20; Air-to-liquid heat exchanger 21; Liquid cooling plate 22; Exhaust module 30; high heating component 40; low heating component 50; DC electrical component 51; capacitor module 52; heat dissipation surface 521; AC electrical component 53; air heat exchanger 60; cold air outlet 61; hot air outlet 62; first heating element 70; second heating element 80; fuse 81; first connector 82; second connector 83.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is evident that the described embodiments are preferred embodiments of the invention and should not be regarded as exclusive of other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

In the claims, description and above-mentioned drawings of the present invention, unless otherwise expressly limited, the terms "first", "second" or "third" are used to distinguish different objects and are not used for Describe a specific sequence.

In the claims, description and above-mentioned drawings of the present invention, unless otherwise expressly limited, the terms "center", "horizontal", "vertical", "horizontal", "vertical" and "top" are used for directional terms. , "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise" and other directions or The positional relationships are based on the orientations and positional relationships shown in the drawings, and are only for convenience of describing the present invention 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. , therefore it cannot be understood as limiting the specific protection scope of the present invention.

In the claims, description and above-mentioned drawings of the present invention, unless otherwise expressly limited, if the terms "fixed connection" or "fixed connection" are used, they should be understood in a broad sense, that is, there is no displacement relationship or relative rotation relationship between the two. Any connection method, that is to say, including non-detachable fixed connection, detachable fixed connection, integration and fixed connection through other devices or components.

In the claims, description and above-mentioned drawings of the present invention, if the terms "include", "have" and their variations are used, the intention is to "include but not be limited to".

Referring to Figure 2-6, Figure 2-6 shows a power cabinet, including a cabinet 10, a heat exchange device 20, an exhaust module 30, an air heat exchanger 60, a first heating element 70 and a second heating element 80.

Referring to Figures 2-4, the cabinet 10 is in the shape of a rectangular parallelepiped. The cabinet 10 is provided with a first side wall 11 and a second side wall 12 that are parallel and opposite to each other along a first direction. The cabinet 10 is formed along a third side wall perpendicular to the first direction. The first abutment wall 13 and the second abutment wall 14 are arranged parallel and opposite to each other in two directions. The first direction is the up-down direction in FIG. 4 , and the second direction is the left-right direction in FIG. 4 .

In this embodiment, the cabinet 10 is provided with a support plate 15 and a partition plate 16. Refer to Figures 5-6. The support plate 15 divides the cabinet 10 into an upper area and a lower area. The upper area forms an air passage 10A. The partition plate 16. The lower area is divided into a middle area and a bottom area. The middle area forms a protective cavity 10B, and the bottom area forms a heat dissipation cavity 10C. That is, the top of the cabinet 10 is provided with an airflow cavity 10A, and the bottom is provided with a heat dissipation cavity 10C. A protective cavity 10B is provided between the air cavity 10A and the heat dissipation cavity 10C, and the protective cavity 10B is relatively sealed. Among them, the support plate 15 extends in the horizontal direction, and the partition plate 16 is Z-shaped as a whole. The partition plate 16 is formed by two horizontal sections and a vertical section, and the vertical section connects the two horizontal sections to form a Z-shaped partition plate.

In this embodiment, since the projection of the partition plate 16 along the second direction is Z-shaped, the partition plate 16 causes the heat dissipation cavity 10C to form a connected first area (left side in Figure 6) and a second area (left side in Figure 6) along the air inlet direction. The right side in Figure 6), the first area is higher than the second area, and the partition plate 16 also allows the protective cavity 10B to form a connected third area (left side in Figure 6) and a fourth area (the left side in Figure 6) along the air inlet direction. on the right), with the third and fourth zones located above the first and second zones respectively.

Referring to Figure 2-3, the air passage cavity 10A has a main air inlet 111 on the first side wall 11 along the first direction, and an air exhaust outlet 101 is provided on the top. The air outlet 101 is close to the second side wall 12; the air passage cavity 10A A first air inlet 131 and a second air inlet 141 are also provided on the first abutment wall 13 and the second abutment wall 14 respectively, that is, the side of the air passage chamber 10A is also provided with opposite air inlet 131 along the second direction. The first air induction outlet 131 and the second air induction outlet 141.

Referring to FIG. 3 , the protective cavity 10B has a third air inlet 123 on the second side wall 12 . Referring to Figure 5-6, the cabinet 10 is also provided with an air outlet 151 that connects the protective cavity 10B and the air passage cavity 10A. The air outlet 151 is away from the main air inlet 111 and close to the second side wall 12. In this embodiment, the air outlet 151 Opened on the support plate 15.

Referring to Figure 6, the heat dissipation cavity 10C is provided with a first air inlet 112 and a second air inlet 113 on the first side wall 11, and is provided with a first air outlet 121 and a second air outlet 122 on the second side wall 12; An air inlet 112 is higher than the first air outlet 121 and away from the ground. The second air inlet 113 is higher than the second air outlet 122 and away from the ground. The "ground" should be understood as the supporting surface of the power cabinet; wherein, the second air inlet 113 and the second air outlet 122 are located between the first air inlet 112 and the first air outlet 121. The first air inlet 112 and the first air outlet 121 are connected to form a first air duct 01. The first air duct 01 has a vertical The extended accommodation section and an air passage section connect the first air inlet 112 and the input end of the accommodation section. The air passage section is only used for air passage. The second air inlet 113 and the second air outlet 122 are connected to form a second air channel. 02. In FIG. 6 , the first air inlet 112 and the first air outlet 121 are respectively located at the upper end and the lower end of the heat dissipation cavity 10C. The air passage section is only used for passing wind, which means that no other heating components will be placed in the air passage section.

Specifically, referring to FIGS. 5-6 , the heat dissipation cavity 10C is provided with an inner partition 17 between the first air outlet 121 and the second air outlet 122 to separate the heat dissipation cavity 10C from the first air inlet 112 and the second air outlet 122 . The upper air outlet chamber 10D corresponding to the air inlet 113 and the second air outlet 122 and the lower air outlet chamber 10F corresponding to the first air outlet 121; the inner partition 17 is provided with a connecting first air inlet 112 and the first air outlet 121. The air flow port 171 forms the output end of the accommodation section of the first air duct 01, and the air flow port 171 and the first air outlet 121 form another part of the first air duct 01; the upper air outlet chamber 10D is The part outside the first air duct 01 forms the second air duct 02. Therefore, the first air duct 01 is partially located in the second air duct 02 . Referring to FIGS. 2-3 , the lower air outlet chamber 10F also forms third air outlets 132 and fourth air outlets 142 on the first abutment wall 13 and the second abutment wall 14 that communicate with the air flow outlet 171 .

In this embodiment, the cabinet 10 is provided with a cover 18. One end of the cover 18 is connected to the first air inlet 112, and the other end is connected to the air outlet 171 to form a part of the first air duct 01. The projection of the cover body 18 along the second direction is L-shaped and is provided with a horizontal section and a vertical section. The horizontal section forms the air passage section of the first air duct 01 , and the vertical section forms the accommodation section of the first air duct 01 .

In the preferred embodiment, the cover 18 is located in the first area of the heat dissipation cavity 10C, and an airflow gap is formed between the cover 18 and the first abutment wall 13 and the second abutment wall 14; the heat dissipation cavity 10C is away from the second side The inner surface of the wall 12 is provided with an air guide surface 161 facing the cover body 18 and parallel to the first side wall 11 . A wind gap is formed between the air guide surface 161 and the cover body 18 and vertically connected to the inner partition 17 . directions are spaced apart. There is a heat insulation gap 03 between the top surface of the cover body 18 and the cavity wall of the heat dissipation cavity 10C. The wind gap between the cover body 18 and the air guide surface 161 can also realize the heat insulation function and is also the heat insulation gap 03 . In this embodiment, the surface of the vertical section of the partition plate 16 facing the first side wall 11 forms the air guide surface 161 .

Specifically, in this embodiment, the cabinet 10 includes a fan module 19 corresponding to the heat dissipation cavity 10C; the fan module 19 is installed on the first side wall 11 and is used to supply air to the first air inlet 112 and the second air inlet 113 , and the air supply volume to the first air inlet 112 is greater than the air supply volume to the second air inlet 113 . In this embodiment, the fan module 19 includes a first fan 191 opposite the first air inlet 112 and a second fan 192 opposite the second air inlet 113. Both the first fan 191 and the second fan 192 are air supply fans. The power of the first fan 191 is greater than the power of the second fan 192 . The fan module 19 is installed on the first side wall 11. Compared with being installed on the second side wall 12, the temperature of the fan module 19 is not very high, so that the fan is less likely to be damaged.

Referring to Figures 3-6, the heat exchange device 20 includes an air-to-liquid heat exchanger 21 placed in the air passage chamber 10A and supported by a support plate 15 and a liquid cooling plate 22 placed in the protective chamber 10B and dissipating heat for the high-heating component 40. The air-to-liquid heat exchanger 21 is connected with the liquid inlet and the liquid outlet of the liquid cooling plate 22, thereby transporting cold liquid to the liquid cooling plate 22 and recovering hot liquid from the liquid cooling plate to realize a liquid cooling cycle. The air-to-liquid heat exchanger 21 Existing technology can be used, which will not be described again here. The air extraction module 30 is placed at the air outlet 101 to drive the air flow from the air inlet 111 through the air duct to the air outlet 101 . It should be understood that in this embodiment, the exhaust module 30 should have a higher protection level. The air-to-liquid heat exchanger 21 dissipates heat through the main air inlet 111, the first air inlet 131, the second air inlet 141, the air extraction module 30 and the air exhaust outlet 101, and the heat exchange efficiency is high. When multiple power cabinets are paralleled in the second direction, only the outermost first air inlet 131 and the second air inlet 141 can enter the air. Due to the limitation of wind pressure, the first air inlet 131 and the second air inlet 141 of the wind cavity 10A of the power cabinet in the middle will not allow air to enter.

Still referring to Figures 5-6, the heating component is placed in the protective cavity 10B and includes a high heating component 40 and a low heating component 50; the high heating component 40 is dissipated by the liquid cooling plate 22, and the high heating component 40 is an inverter in this embodiment. module, so the water pipe of the air-liquid heat exchanger 21 also penetrates the support plate 15 and is connected to the liquid cooling plate 22; the low-heating component 50 includes a DC electrical component 51, an AC electrical component 53 and a capacitor module 52, and the DC electrical component 51 is close to the first The side wall 11 and the AC electrical component 53 are placed at the bottom of the protection cavity 10B near the second side wall 12 and located below the air heat exchanger 60; the capacitor module 52 is located between the DC electrical component 51 and the AC electrical component 53 and is located between the high-heating Piece 40 below. In this embodiment, the lower surface of the capacitor module 52 is provided with a heat dissipation surface 521 parallel to the horizontal direction.

Among them, the DC electrical component 51 is placed in the third area, the AC electrical component 53 is placed in the fourth area, and the capacitor module 52 spans the third area and the fourth area. The high heating element 40 is located above the fourth area. The electrical connection relationship in the protective cavity 10B is that the DC electrical component 51 is connected to the capacitor module 52 , the capacitor module 52 is connected to the high-heat-generating component 40 , and the high-heat-generating component 40 is connected to the AC electrical component 53 .

The air heat exchanger 60 is installed on the inner surface of the second side wall 12; the air heat exchanger 60 is provided with a cold air outlet 61 that delivers cold air to the protective cavity 10B and a hot air outlet 62 that recovers hot air from the protective cavity 10B; wherein, the hot air outlet 62 and the cold air outlet 61 are both facing the first side wall 11, and the hot air outlet 62 is higher than the cold air outlet 61. In practical applications, the hot air outlet 62 is also equipped with an exhaust fan. The axis of the exhaust fan is parallel to the first direction, and the air heat exchange The device 60 is provided with a first air flow channel and a second air flow channel. The first air flow channel is connected to the third air inlet 123 and the air outlet 151. The second air flow channel is provided with a cold air outlet 61 and a hot air outlet 62; the exhaust module 30 also drives the air from The third air inlet 123 flows to the air outlet 101 through the air outlet 151; the first air flow channel and the second air flow channel exchange heat with each other to take away the heat of the second air flow channel. Among them, the high heating element 40 is close to the hot air outlet 62 .

In this embodiment, the electrical components in the protective cavity 10B mainly dissipate heat through liquid cooling and air cooling. Among them, the high-heat-generating components 40 dissipate heat through liquid cooling. The liquid-cooling heat dissipation method has high heat dissipation efficiency, and the low-heat-generating components 50 use air cooling. Heat dissipation, since both the air heat exchanger 60 and the air-liquid heat exchanger 21 dissipate heat through external circulation, the protection of the protective cavity 10B can be greatly improved; the high-heating part 40 is close to the hot air outlet 62 of the air heat exchanger 60, so the air The cold airflow flowing out of the cold air outlet 61 of the heat exchanger 60 can first take away the heat of the low-heat-generating components 50 in the protective cavity 10B, and then take away the heat of the high-heat-generating components 40, thereby ensuring the heat dissipation efficiency of the low-heat-generating components 50. Among them, the combined heat dissipation method of liquid cooling and air cooling can maximize the heat dissipation efficiency of the heating components in the protective cavity 10B, and the protective cavity 10B has good protection.

In this embodiment, since the hot air outlet 62 of the air heat exchanger 60 is higher than the cold air outlet 61, the cold air of the air heat exchanger 60 can gradually take away the heat of the heating components in the protective cavity 10B while flowing upward in the protective cavity 10B. , the air flow circulation is good; the high-heating part 40 is lower than the hot air outlet 62, so the resistance of the hot air when it returns is small, and because the density of the hot air in the air flow is smaller than that of the air, when the high-heating part 40 passes through the backflow, the cold air is at the bottom and the hot air is at the top. , so that the air heat exchanger 60 can dissipate heat for the low-heat-generating component 50 and also dissipate heat for the high-heat-generating component 40 .

In this embodiment, the air heat exchanger 60 and the air-to-liquid heat exchanger 21 share the exhaust module 30 and thus the exhaust outlet 101, so that the hot air generated by the protective cavity 10B is discharged from the exhaust outlet 101 on the top of the cabinet 10, thereby When multiple power cabinets are used side by side along the first direction, the hot air from the air outlet 101 of the upstream power cabinet will not affect the main air inlet 111 of the downstream power cabinet; wherein, the air heat exchanger 60 is attached to the second The inner surface of the side wall 12 is more beautiful than the outer surface of the second side wall 12. If the air heat exchanger 60 is installed on the outer surface of the second side wall 12, the hot air from the first air flow channel can easily flow in. The main air inlet 111 of the downstream cabinet 10.

The capacitor module 52 generates the largest amount of heat among the low-heat-generating components 50. The capacitor module 52 is located between the DC electrical component 51 and the AC electrical component 53 and below the high-heat-generating component 40, which is convenient for routing, and the cold air from the air heat exchanger 60 passes through the AC The electrical component 53, the capacitor module 52, and the DC electrical component 51 flow through the high-heating component 40 and are recycled to the hot air outlet 62. Since the heat generated by the AC electrical component 53 is small, the temperature of the cold air is still low after passing through the AC electrical component 53, so that it can The heat of the capacitor module 52 is well taken away, and since the DC electrical component 51 is close to the first side wall 11 , the heat of the DC electrical component 51 can be radiated outward through the first side wall 11 , so that the heat dissipation efficiency of the low heat-generating component 50 is high.

In this embodiment, the lower surface of the capacitor module 52 is provided with a heat dissipation surface 521 parallel to the horizontal direction, which not only facilitates the electrical coupling between the upper surface of the capacitor module 52 and the high-heating component 40 , but also allows the cold air to better circulate the capacitor module 52 heat dissipation.

Referring to Figure 6, the first heating element 70 extends in the vertical direction. The first heating element 70 is placed in the accommodation section of the first air duct 01 and forms an airflow gap with the air duct wall of the first air duct 01. Its top is not higher than the input end of the accommodating section to allow the air flow of the first air inlet 112 to take away the heat of the first heating element 70 from top to bottom. The first heating element 70 is located in the upper air outlet chamber 10D, mainly in the upper air outlet chamber 10D. Placed in the vertical section of the cover body 18 , the bottom end of the first heating element 70 is higher than the first air outlet 121 . That is, the first heating element 70 is placed in the first area. The "wind gap" should be understood as being only used for passing the wind, and other heating components cannot be placed in the wind gap. In this embodiment, the first heating element 70 is a reactor, and the first heating element 70 is placed in the first air duct 01 of the heat dissipation cavity 10C. On the one hand, the first heating element 70 is heavy and is placed in the cabinet 10 The bottom has better load-bearing capacity. On the other hand, it also makes the hot air discharged from the first air outlet 121 of the first air duct 01 as far away from the third air inlet 123 as possible. The movement trajectory of the hot air from the first air outlet 121 is parabolic, thereby avoiding the first The hot air generated by the heating element 70 disturbs the cold air from the third air inlet 123 . The first heating element 70 is located in the upper air outlet chamber 10D, so that the lower air outlet chamber 10F is separated between the first heating element 70 and the ground, thereby preventing the first heating element 70 from being affected by thermal radiation from the ground.

Since the air gap is formed between the cover body 18 and the first abutment wall 13 and the second abutment wall 14, it is beneficial for the cold air flow from the second air inlet 113 to pass through the cover body 18, so that the air flow velocity increases, and the cold air flow is After flowing to the air guide surface 161, it collides with the air guide surface 161, and the flow speed further increases. The air flow that collides with the air guide surface 161 flows downward along the outside of the cover body 18, thereby taking away the heat radiation of the first heating element 70 to the cover. The heat of the body 18 further improves the heat dissipation efficiency of the first heating element 70; since the air guide surface 161 is vertically spaced from the inner partition 17, the air flow that does not collide with the air guide surface 161 continues to flow to the second air outlet 122.

Since there is a heat insulation gap 03 between the top surface of the cover body 18 and the cavity wall of the heat dissipation cavity 10C, the heat insulation gap 03 cooperates with the wind gap between the cover body 18 and the air guide surface 161 to reduce the size of the cover body. 18 and the partition plate 16, thereby preventing the heat of the first heating element 70 from dissipating into the protection cavity 10B through radiation, and further avoiding the impact on the electrical components in the protection cavity 10B. The heat dissipation efficiency of the entire cabinet 10 is improved, making it difficult for the heat of the first heating element 70 to be transferred upward through thermal radiation.

The second heating element 80 is at least partially located in the second air duct 02 . The second heating element 80 has less heat than the first heating element 70 . The second heating element 80 includes a fuse 81 , a first connector 82 and a second connector 83 . The fuse 81 is used for electrical coupling with the DC electrical component 51 . The first connector 82 is a DC electrical connector, and the second connector 83 is an AC electrical connector connected to the AC electrical component 53 . Since the heat generated by the fuse 81 is greater than that of the first connector 82 and the second connector 83 , the temperature resistance of the fuse 81 is lower than that of the first connector 82 and the second connector 83 . The fuse 81 and the first connector 82 The second connector 83 is located on one side of the first heating element 70 close to the first side wall 11 along the second direction, and the second connector 83 is located on the other side of the first heating element 70 close to the second side wall 12 along the second direction, which is conducive to the first The wiring operation of the connector 82 and the DC electrical component 51 and the wiring operation of the second connector 83 and the AC electrical component 53 as well as the fuse 81 , the first connector 82 and the second connector 83 . The fuse 81 is close to the second air inlet 113 , and the first connector 82 is located below the fuse 81 . The first connector 82 and the second connector 83 extend through the inner partition 17 into the lower air outlet chamber 10F to improve heat dissipation efficiency. Correspondingly, a wiring hole for extending the DC electrical components 51 may be provided at the bottom end of the first side wall 11 , and a wiring hole for extending the AC electrical components 53 may also be provided at the bottom end of the second side wall 12 .

In this embodiment, the first heating element 70 extends in the vertical direction, is placed in the accommodation section of the first air duct 01 and forms an air passage gap with the air duct wall of the first air duct 01, and its top end is not is higher than the input end of the accommodating section to allow the air flow of the first air inlet 112 to take away the heat of the first heating element 70 from top to bottom. On the one hand, the first air inlet 112 is kept away from the ground, thereby preventing entry when the ground temperature is high. The air flow in the first air duct 01 is hot air, which ensures that the air flow entering the first air duct 01 is cold air away from the ground. Since the wind passage section is only used for passing wind, the air flow between the first heating element 70 and the first air duct 01 An air gap is formed between the duct walls, and the heat of the first heating element 70 is relatively concentrated. Therefore, the cold air flow from the first air inlet 112 flows directly to the first heating element 70 and takes away the heat of the first heating element 70 from top to bottom. When the air flow flows into the wind gap, the flow speed is faster, so the air flow can quickly take away the heat of the first heating element 70, and the heat dissipation efficiency of the first heating element 70 is high. On the other hand, since the first air outlet 121 is closer to the ground, The first air outlet 121 is relatively low so that when the hot air from the first air outlet 121 moves upward after coming out, the movement trajectory is basically parabolic, which prevents the cabinet 10 from opening an air inlet on the same surface as the first air outlet 121 above the heat dissipation cavity. (The third air inlet 123), hot air enters the air inlet to affect heat dissipation, and also makes it difficult to affect the air inlet of the downstream adjacent power cabinet when multiple power cabinets are used side by side in the horizontal direction; in addition, the first heating element 70 is located in an independent heat dissipation cavity, and the hot air flowing through the first heating component 70 is directly discharged without disturbing other electrical components. It can be seen that in this technical solution, the cold air temperature of the first heating element 70 is low and the heat dissipation efficiency is high. At the same time, the hot air of the first heating element 70, that is, the hot air of the first air outlet 121, is as close to the ground as possible to avoid heat dissipation of the cabinet 10. The air inlet above the cavity and located on the same surface as the first air outlet 121 affects or affects the downstream power cabinet.

Further, the second heating element 80 is at least partially located in the second air duct 02, because the second air inlet 113 and the second air outlet 122 are both located between the first air inlet 112 and the first air outlet 121, and the second air inlet 113 is located between the first air inlet 112 and the first air outlet 121. The air outlet 113 is higher than the second air outlet 122. Therefore, the first air inlet 112 is further away from the ground than the second air inlet 113. The second air outlet 122 is further away from the ground than the first air outlet 121. The first air inlet 113 is further away from the ground than the second air outlet 121. The inlet air temperature of 112 is lower than the temperature of the second air inlet 113 , and the outlet air temperature of the first air outlet 121 is higher than the outlet temperature of the second air outlet 122 . In this way, the colder air flow can be used for the first heating element 70 Heat dissipation, the second cold air flow dissipates heat for the second heating element 80, the hotter air flow is closer to the ground, and the second hot air flow is away from the ground. When the calorific value of the first heating element 70 is greater than the calorific value of the second heating element 80, this An arrangement enables the first heating element 70 and the second heating element 80 to have high heat dissipation efficiency at the same time. At the same time, because the hot air from the first air outlet 121 is hotter than the hot air from the second air outlet 122, it also makes the second air outlet 122 The hot air can flow upward with the hot air from the first air outlet 121. Since the hot air discharged from the first air outlet 121 and the second air outlet 122 of the cabinet 10 is located at the bottom of the cabinet 10, it avoids the cabinet 10 being in the heat dissipation cavity. When an air inlet is opened on the same surface as the first air outlet 121 and the second air outlet 122, the hot air flows into the first air outlet 121 and the second air outlet 122, which also allows multiple power cabinets to be arranged side by side in the horizontal direction. When in use, it is not easy to affect the air inlet of the adjacent power cabinet downstream; among them, the second heating element 80 is at least partially located in the second air duct 02, and the second heating element 80 can dissipate heat through the second air duct 02, thereby improving the heat dissipation efficiency. High, because the second heating element 80 generates less heat, during the heat dissipation process, the second air duct 02 can also take away the heat of the first air duct 01 , thereby further improving the heat dissipation efficiency of the first heating element 70 . The first heating element 70 and the second heating element 80 are located in independent heat dissipation cavities. The hot air flowing through the first heating element 70 and the second heating element 80 is directly discharged without disturbing other electrical components.

More preferably, on the basis that the cold air temperature of the first air inlet 112 is lower than the cold air temperature of the second air inlet 113, the air volume of the first air inlet 112 is greater than the air volume of the second air inlet 113. On the one hand, the first heating element 70 has higher heat dissipation efficiency, and the heat radiation to the second heating element 80 is smaller, so the heat dissipation efficiency of the second heating element 80 is also higher; on the other hand, the air volume of the first air outlet 121 is also larger than that of the second heating element 80. The air volume of the air outlet 122 allows the hot air from the first air outlet 121 to carry the hot air from the second air outlet 122 to move in a parabolic trajectory, away from other air inlets above the heat dissipation cavity 10C or the air inlet of the downstream power cabinet; The second heating element 80 that generates less heat is placed in the second air duct 02 with smaller air volume, which not only meets the heat dissipation requirement of the second heating element 80 , but also assists in heat dissipation for the first heating element 70 .

In this embodiment, the lower air outlet chamber 10F also forms a third air outlet 132 and a fourth air outlet 142 on the first abutting wall 13 and the second abutting wall 14 that are connected with the air outlet 151 and the air outlet 171, so that the air flow is In addition to flowing out through the first air outlet 121, the hot air passing through the first heating element 70 can also flow out through the third air outlet 132 and the fourth air outlet 142, so that the amount of hot air in the first air outlet 121 is reduced and is less likely to flow downstream. The first air inlet 112 and the second air inlet 113 of the power cabinet cause interference; it should be understood that the first abutment wall 13 and the second abutment wall 14 are suitable for use when combined with other power cabinets. When the cabinets are combined along the second direction to form a power group, only the third air outlet 132 and the fourth air outlet 142 located on the outermost side will discharge air. The third air outlet 132 and the fourth air outlet 142 of the power cabinet located in the middle are due to The adjacent power cabinets have high wind pressure and will not let the air flow out.

After this arrangement, the hot air of the entire power cabinet is discharged from the air exhaust port 101 at the top and the first air outlet 121 at the bottom, making it less likely to disturb the air inlet of the downstream power cabinet. In this embodiment, the high-heating component 40 is placed in the fourth area, and the first heating component 70 is placed in the first area. They are arranged basically diagonally with the first heating component 70 so that the two electrical components that generate large amounts of heat are as far away as possible. , further improving the heat dissipation efficiency; and the DC electrical components 51 are placed in the third area, the AC electrical components 53 are placed in the fourth area, and the capacitor module 52 spans the third area and the fourth area, which is also conducive to wiring.

The above descriptions of the specification and examples are used to explain the scope of protection of the present invention, but do not constitute a limitation of the scope of protection of the present invention. Through the inspiration of the present invention or the above-mentioned embodiments, a person of ordinary skill in the art can obtain the conclusions about the embodiments of the present invention through logical analysis, reasoning or limited testing based on common sense, common technical knowledge in the field and/or existing technology. Or modifications, equivalent substitutions or other improvements of some of the technical features shall be included in the protection scope of the present invention.

Claims (10)

1. A power cabinet, comprising:

The cabinet body (10) is provided with a heat dissipation cavity (10C) at the bottom, a first air inlet (112) and a first air outlet (121) are arranged at the side part of the heat dissipation cavity (10C), the first air inlet (112) and the first air outlet (121) are communicated to form a first air channel (01), the first air inlet (112) is higher than the first air outlet (121) and far away from the ground, the first air channel (01) is provided with a vertically extending accommodating section and an air passing section communicated with the first air inlet (112) and the input end of the accommodating section, and the air passing section is only used for passing air; and

the first heating element (70) extends along the vertical direction, is arranged in the accommodating section of the first air duct (01) and forms an air passing gap with the air duct wall of the first air duct (01), and the top end of the first heating element is not higher than the input end of the accommodating section so as to allow the air flow of the first air inlet (112) to take away the heat of the first heating element (70) from top to bottom.

2. A power cabinet according to claim 1, further comprising a second heat generating element (80) having a lower heat generating capacity than the first heat generating element (70);

the side part of the heat dissipation cavity (10C) is also provided with a second air inlet (113) and a second air outlet (122) which are positioned on the same surface with the first air inlet (112), the second air inlet (113) and the second air outlet (122) are communicated to form a second air duct (02) and are positioned between the first air inlet (112) and the first air outlet (121), and the second air inlet (113) is higher than the second air outlet (122); the first air duct (01) is at least partially positioned in the second air duct (02); the second heating element (80) is arranged in the heat dissipation cavity (10C) and at least partially positioned in the second air duct (02).

3. A power cabinet according to claim 2, wherein the air volume of the first air inlet (112) is larger than the air volume of the second air inlet (113), the heat dissipation chamber (10C) is provided with a first side wall (11) and a second side wall (12) which are parallel and opposite to each other along a first direction, the first air inlet (112) and the second air inlet (113) are both located on the first side wall (11), and the first air outlet (121) and the second air outlet (122) are both located on the second side wall (12).

4. A power cabinet according to claim 3, wherein an inner partition (17) is arranged between the first air outlet (121) and the second air outlet (122) in the heat dissipation chamber (10C) to divide the heat dissipation chamber (10C) into an upper air outlet chamber (10D) corresponding to the first air inlet (112), the second air inlet (113) and the second air outlet (122) and a lower air outlet chamber (10F) corresponding to the first air outlet (121); a flow air port (171) which is communicated with the first air inlet (112) and the first air outlet (121) is formed in the inner partition plate (17), the flow air port (171) forms an output end of the accommodating section of the first air channel (01), and the other part of the first air channel (01) is formed between the flow air port (171) and the first air outlet (121); the first heating element (70) is positioned in the upper air outlet chamber (10D); the second air duct (02) is formed at a part outside the first air duct (01) in the upper air outlet chamber (10D).

5. A power cabinet according to claim 4, wherein the cabinet body (10) is provided with a first abutting wall (13) and a second abutting wall (14) which are parallel and opposite to each other along a second direction perpendicular to the first direction, and the lower air outlet chamber is further provided with a third air outlet (132) and a fourth air outlet (142) which are communicated with the air outlet (171) on the first abutting wall (13) and the second abutting wall (14).

6. A power cabinet according to claim 5, characterized in that the cabinet body (10) is provided with a cover body (18), one end of the cover body (18) is communicated with the first air inlet (112), the other end is communicated with the air outlet (171), the projection of the cover body (18) along the second direction is L-shaped and is provided with a horizontal section and a vertical section, the horizontal section forms an air passing section of the first air duct (01), and the vertical section forms a containing section of the first air duct (01).

7. A power cabinet according to claim 6, characterized in that the cover (18) forms an overwind gap with both the first abutment wall (13) and the second abutment wall (14); the inner surface of the heat dissipation cavity (10C) deviating from the second side wall (12) is provided with an air guide surface (161) facing the cover body (18) and being parallel to the first side wall (11), and an air passing gap is formed between the air guide surface (161) and the cover body (18) and is spaced from the inner partition plate (17) along the vertical direction.

8. A power cabinet according to claim 7, characterized in that a thermal insulation gap (03) is present between the top surface of the cover (18) and the cavity wall of the heat dissipation cavity (10C).

9. A power cabinet according to claim 8, wherein the first heat generating element (70) is a reactor, the second heat generating element (80) comprises a fuse (81), a first connector (82) and a second connector (83), the fuse (81), the first connector (82) are located at one side of the first heat generating element (70) close to the first side wall (11) along the second direction, and the second connector (83) is located at the other side of the first heat generating element (70) close to the second side wall (12) along the second direction; the fuse (81) is close to the second air inlet (113), and the first connector (82) is positioned below the fuse (81); the first connector (82) and the second connector (83) penetrate through the inner partition plate (17) and extend into the lower air outlet chamber (10F).

10. A power cabinet according to claim 1, characterized in that the cabinet body (10) comprises a fan module (19); the fan module (19) is arranged on the first side wall (11) and used for supplying air to the first air inlet (112) and the second air inlet (113), and the air supply amount to the first air inlet (112) is larger than that to the second air inlet (113).