A power cabinet

Abstract

This invention discloses a power cabinet, including a cabinet body, a heat exchange device, and a cooling fan. The cabinet body has an air passage cavity at the top, a main air intake on the side of the air passage cavity, and an exhaust port at the top. The heat exchange device has two heat exchange sections located within the air passage cavity. The two heat exchange sections are arranged at an angle, with one end intersecting each other along a first direction, and the other ends forming an opening. Each heat exchange section has a cooling section and several air passages, each air passage being adapted for horizontal airflow. The cooling fan drives the airflow from the air intake through the air passages to the exhaust port. This power cabinet ensures that the heat flow from an upstream power cabinet does not interfere with the heat flow from a downstream power cabinet, has a small footprint, is less prone to sand accumulation in the heat exchange sections, and has high heat exchange efficiency.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and more specifically to a power cabinet. Background Technology

[0002] Photovoltaic inverters, energy storage converters, and other power cabinets typically have high heat dissipation requirements. The air inlets and outlets of these power cabinets are often located at the front and rear, respectively. In practical applications, multiple power cabinets are often spaced out along the front-to-back direction. Therefore, airflow between the power cabinets can interfere with each other. For example, hot air from an upstream power cabinet can enter the cold air inlet of a downstream power cabinet; or hot air from two power cabinets can blow against each other, causing turbulent airflow and mutual interference. These factors often result in a "heat island" effect and increased equipment temperature, ultimately leading to equipment derating. Existing technologies often address this by increasing the distance between power cabinets and changing their layout. However, increasing the spacing between power cabinets increases the floor space required, and even with increased spacing, heat flow disturbances still have an impact. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned defects or problems in the background art and provide a power cabinet that prevents the heat flow of the upstream power cabinet from interfering with the downstream power cabinet, and has a small footprint, makes the heat exchange device of the power cabinet less prone to sand accumulation, and has high heat exchange efficiency.

[0004] To achieve the above objectives, the present invention and its preferred embodiments employ the following technical solutions, but the embodiments are not limited to the following solutions:

[0005] A power cabinet includes a cabinet body with an air passage cavity at the top, a main air intake opening on the side of the air passage cavity along a first horizontal direction, and an exhaust port at the top; a heat exchange device having two heat exchange sections located within the air passage cavity; the two heat exchange sections are arranged at an angle, with one end of each section intersecting each other along the first direction and the other end of each section forming an opening; each heat exchange section having a cooling section and several air passages, each air passage being adapted to allow airflow in a horizontal direction; and a cooling fan that drives airflow from the air intake opening through the air passages to the exhaust port.

[0006] In a preferred embodiment, the side of the air passage cavity is further provided with a first air inlet and a second air inlet that are opposite to each other along a second horizontal direction perpendicular to the first direction; the heat exchange section is a heat exchange plate extending in a vertical direction, and the heat exchange plate is inclined relative to both the first and second directions.

[0007] In a preferred embodiment, the heat exchange plates are provided with alternating coolant channels and air passages along the vertical direction, and each coolant channel forms the part to be cooled; the ends of the two heat exchange plates that intersect are close to the main air inlet; the heat exchange device is also provided with a coolant conveying component located between the two heat exchange plates for conveying coolant.

[0008] In a preferred embodiment, the projections of the first and second air inlets along the second direction cover the projections of the heat exchange plates along the second direction; the cooling fan is installed at the exhaust port and its projection along the vertical direction onto the horizontal plane is spaced apart from the two heat exchange plates along the first direction.

[0009] In a preferred embodiment, the coolant channels of the two heat exchange fins are connected in parallel via a coolant delivery device.

[0010] As a preferred embodiment, it also includes a heating element; the cabinet is also provided with a relatively sealed and independent protective cavity below the air passage cavity; the heat exchange device is also provided with a liquid cooling plate for dissipating heat from the heating element; the liquid inlet and outlet of the liquid cooling plate are connected to two heat exchange plates through a coolant delivery component.

[0011] As a preferred embodiment, it also includes an air heat exchanger; the cabinet is further provided with an air outlet connecting the protective cavity and the air passage cavity; the air outlet is away from the main air intake; the cabinet is provided with a first side wall and a second side wall that are parallel to each other and opposite to each other along a first direction, the main air intake is located on the first side wall, the exhaust port is close to the second side wall, and the protective cavity is provided with a third air inlet on the second side wall; the air heat exchanger is provided with a first airflow channel and a second airflow channel, the first airflow channel connecting the third air inlet and the air outlet, and the second airflow channel is provided with a cold air outlet for supplying cold air to the protective cavity and a hot air outlet for recovering hot air from the protective cavity; the first airflow channel and the second airflow channel exchange heat with each other to remove the heat from the second airflow channel.

[0012] In a preferred embodiment, the device further includes an electrical component, which includes a reactor extending in a vertical direction; the bottom of the cabinet is also provided with a heat dissipation cavity, the upper end of the heat dissipation cavity is provided with a first air inlet on a first side wall, the lower end of the heat dissipation cavity is provided with a first air outlet on a second side wall, the first air outlet is away from the third air inlet, and the first air inlet and the first air outlet are connected to form a first air duct; the reactor is placed in the first air duct.

[0013] As a preferred embodiment, it also includes a cover; the cabinet is provided with a partition plate, the upper surface and the lower surface of the partition plate forming the cavity walls of the protective cavity and the heat dissipation cavity, respectively; the cover is placed over the reactor and connects the first air inlet and the first air outlet to form the first air duct; there is a heat insulation gap between the cover and the partition plate.

[0014] In a preferred embodiment, the heating component includes a high-heat-generating component and a low-heat-generating component. The liquid cooling plate is used to dissipate heat from the high-heat-generating component, and the air heat exchanger is used to dissipate heat from the low-heat-generating component. The partition plate causes the heat dissipation cavity to form a first zone and a second zone that are connected along the air inlet direction. The first zone is higher than the second zone, and the reactor module is placed in the first zone. The partition plate also causes the protective cavity to form a third zone and a fourth zone that are connected along the air inlet direction. The third zone and the fourth zone are respectively located above the first zone and the second zone, and the high-heat-generating component is located above the fourth zone.

[0015] As can be seen from the above description of the present invention and its preferred embodiments, compared with the prior art, the technical solution of the present invention and its preferred embodiments have the following beneficial effects due to the adoption of the following technical means:

[0016] Through continuous observation, experimentation, and research, the applicant has determined that the reason for the "heat island effect between power cabinets" in the existing technical solutions is that the air outlet of the upstream power cabinet faces the air inlet of the downstream power cabinet. In this technical solution, the main air inlet is located on the side of the air passage cavity, and the exhaust outlet is located at the top of the air passage cavity. The hot air density is low, so the hot air flow discharged from the top of the air passage cavity mainly flows upward and not downward, thereby avoiding heat flow disturbance to the main air inlet of the downstream power cabinet. Based on this, when a heat exchange device is placed inside the air passage, in a conventional heat exchange device, the two heat exchange sections are V-shaped with their openings facing upwards. The fan is positioned above the area between the two heat exchange sections, which are inclined relative to the vertical direction. The air ducts within the heat exchange sections are also inclined relative to the vertical direction. After the fan operates, the airflow direction changes after passing through the air ducts, and the airflow from the two heat exchange sections blows against each other. Therefore, sand easily accumulates at the inner and outer angles at the bottom of the two heat exchange sections and within the air ducts of the heat exchange sections under the influence of gravity and airflow. After long-term operation, the air resistance is large, which greatly affects the heat exchange efficiency. The proposed solution addresses the issue of sand accumulation in the heat exchange section by locating the exhaust vent at the top of the cabinet. Specifically, the two heat exchange sections are positioned at an angle, with one end intersecting along the first direction and the other end opening away from each other. Each air duct is designed for horizontal airflow, ensuring that the airflow direction remains essentially unchanged as it passes through the ducts. This minimizes resistance within the ducts, allowing airflow from the main exhaust vent to directly blow away any accumulated sand. Since the opening formed by the angle between the two heat exchange sections is horizontal, sand is less likely to accumulate at the angle. Simultaneously, the air ducts effectively cool the section awaiting cooling. Furthermore, the angled arrangement of the two heat exchange sections provides both sections with a large airflow area and a small volume. Therefore, this technical solution avoids heat flow disturbance to the main exhaust vent of downstream power cabinets when multiple power cabinets are arranged side-by-side along the first direction, and also prevents sand accumulation in the heat exchange sections when air is exhausted from the top. This improves the heat exchange efficiency after long-term operation.

[0017] In the relevant technical solutions and their preferred embodiments, the placement of the first and second air inlets facilitates faster removal of heat from the coolant channels of the two heat exchange fins, thereby improving the heat exchange efficiency of the heat exchange fins. When multiple power cabinets are connected in parallel along the second direction, only the outermost first and second air inlets can receive air. Due to air pressure limitations, the air passage chambers of the middle power cabinets will not receive air from the first and second air inlets.

[0018] In the relevant technical solutions and their preferred embodiments, the coolant delivery component of the heat exchange device is placed in the area between the two heat exchange plates. This not only makes full use of the space between the two heat exchange plates, but also allows maintenance of the coolant delivery component to be performed only at the open ends of the two heat exchange plates. Since the ends of the two heat exchange plates that are close to each other are close to the main air inlet, the airflow first dissipates heat from the heat exchange plates and then dissipates heat from the liquid-cooled delivery component. This ensures the heat dissipation efficiency of the heat exchange plates while also achieving heat dissipation for the liquid-cooled delivery component.

[0019] In the relevant technical solutions and their preferred embodiments, the projections of the first and second air inlets along the second direction cover the projections of the heat exchange plates along the second direction, further increasing the air intake of the heat exchange plates; the cooling fan is installed at the exhaust port and the projection of the cooling fan along the vertical direction is spaced apart from the two heat exchange plates along the first direction, ensuring that the airflow completely passes through the air passage of the heat exchange plates.

[0020] In the relevant technical solutions and their preferred embodiments, since the coolant channels of the two heat exchange plates are connected in parallel through the coolant delivery components, the inlet of each heat exchange plate is the hottest liquid that has just come out of the liquid cooling plate (the temperature difference between the liquid inside the heat exchange plate and the outside cold air is the largest, and the heat exchange effect is the best). At the same time, each heat exchange plate only carries half of the total system flow, which greatly reduces the system flow resistance. This not only increases the heat exchange efficiency of the heat exchange plates but also reduces the system flow resistance.

[0021] In the relevant technical solutions and their preferred embodiments, the protective cavity is relatively independent and sealed, meaning that the protective cavity has a high level of protection (waterproof and dustproof), and also that the internal structure of the protective cavity does not encroach on other cavities (air passage cavity and heat dissipation cavity), such as the air duct of the heat dissipation cavity extending into the protective cavity. Therefore, the protective cavity has sufficient space for the installation of the heating components, making them less susceptible to heat radiation from electrical components and allowing for a layout most conducive to heat dissipation, thereby improving the heat dissipation efficiency of the heating components. The heating components within the protective cavity can dissipate heat at least partially through liquid cooling. Liquid cooling is easier to control than air cooling, has higher heat dissipation efficiency, and facilitates the formation of a relatively sealed structure within the protective cavity, thus improving the protective properties of the cavity.

[0022] In the relevant technical solutions and their preferred embodiments, the heat-generating components within the protective cavity are primarily cooled by liquid cooling and air cooling, resulting in high heat dissipation efficiency. Furthermore, since both the air heat exchanger and the heat exchange device utilize external circulation for heat dissipation, the protective cavity's protective properties are significantly enhanced. Therefore, the combined liquid and air cooling method maximizes the heat dissipation efficiency of the heat-generating components within the protective cavity, ensuring excellent protection. It also facilitates parallel operation of power cabinets or their horizontal arrangement, and reduces the spacing between power cabinets. The placement of the air vents allows hot air from the protective cavity to be discharged to the exhaust vent, further preventing the downstream power cabinet's main exhaust vent from being affected by the heat flow disturbance from the upstream power cabinet. The air vents are located far from the main exhaust vent, preventing the hot air from the protective cavity from interfering with the heat exchange plates.

[0023] In the relevant technical solutions and their preferred embodiments, a liquid-cooled unit is placed inside the air passage cavity. The liquid-cooled unit may be at risk of leakage. A protective cavity is located between the air passage cavity and the heat dissipation cavity. Because the protective cavity is relatively independent and sealed, it completely separates the air passage cavity and the heat dissipation cavity. Therefore, the relatively sealed protective cavity improves its own protection, preventing leakage from the air passage cavity from entering the protective cavity. Furthermore, it acts as a partition to prevent leakage from entering the heat dissipation cavity, thereby preventing damage to electrical components. As for the leakage problem between the liquid-cooled unit and the liquid-cooled plate piping, this can be addressed by improving the protective properties of the connecting pipes, which is outside the scope of this application. The leakage problem of the liquid-cooled unit discussed in this application mainly addresses the leakage problem of the portion of the liquid-cooled unit inside the air passage cavity. The reactor is placed in the first air duct of the heat dissipation cavity. This is because the reactor is relatively heavy, and placing it at the bottom of the cabinet provides better load-bearing capacity. Furthermore, it keeps the first air inlet away from the ground while the first air outlet is closer to the ground. This prevents hot air from entering the first air duct when the ground temperature is high, ensuring that the airflow entering the first air duct is cool air away from the ground. This results in high heat dissipation efficiency for the reactor. Additionally, because the first air outlet is low, the hot air flowing upwards from the first outlet follows a roughly parabolic trajectory, preventing hot air from entering the third air inlet and affecting its performance. The soundproof enclosure also facilitates heat dissipation, making it less likely to affect the air inlets of downstream adjacent power cabinets when multiple power cabinets are used side by side along the first horizontal direction. Furthermore, since the reactor is placed in an independent first air duct, the heat is relatively concentrated, allowing the cool air entering the first air duct through the first air inlet to pass completely through the reactor from top to bottom, thereby quickly removing the heat from the reactor. The reactor has high heat dissipation efficiency. With this configuration, the hot air from the entire power cabinet is discharged from the exhaust vent at the top and the first air outlet at the bottom, making it less likely to cause turbulence to the air inlets of downstream power cabinets.

[0024] In the relevant technical solutions and their preferred embodiments, there is a heat insulation gap between the cover and the partition plate. The heat insulation gap reduces the heat conduction efficiency between the cover and the partition plate, thereby preventing the heat of the reactor from dissipating into the protective cavity through radiation and improving the heat dissipation efficiency of the entire cabinet.

[0025] In the relevant technical solutions and their preferred embodiments, the high-heat-generating component is placed in the fourth zone, and the reactor is placed in the first zone, arranged roughly diagonally to the high-heat-generating component. This keeps the two electrical components with high heat generation as far apart as possible, further improving heat dissipation efficiency. The high-heat-generating component is cooled by liquid cooling, which is highly efficient, while the low-heat-generating component is cooled by air cooling, which is also highly efficient. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments are briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the power cabinet according to an embodiment of the present invention. Figure 1 ;

[0028] Figure 2 This is a schematic diagram of the power cabinet according to an embodiment of the present invention. Figure 2 ;

[0029] Figure 3 This is a top view of the power cabinet after it is hidden behind the top plate of the cabinet, according to an embodiment of the present invention.

[0030] Figure 4 This is a schematic diagram of the power cabinet hidden behind the top plate of the cabinet according to an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the air-liquid heat exchanger for the power cabinet according to an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the internal structure of the power cabinet according to an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the interior of the hidden portion of the power cabinet in an embodiment of the present invention.

[0034] Explanation of key figure labels:

[0035] Cabinet 10; Air passage chamber 10A; Exhaust vent 101; Protective chamber 10B; Heat dissipation chamber 10C; Upper exhaust chamber 10D; Lower exhaust chamber 10F; First air duct 01; Second air duct 02; First side wall 11; Main air intake 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 abutment wall 13; First air intake 131; Third air outlet 132; Second abutment wall 14; Second air intake 141; Fourth air outlet 142; Support plate 15; Air passage 151; Partition plate 16; Air guide surface 161 ; Inner partition 17; Air vent 171; Cover 18; Fan module 19; First fan 191; Second fan 192; Insulation gap 03; Heat exchange device 20; Air-liquid heat exchanger 21; Heat exchange plate 211; Liquid cooling pipe 2111; Heat dissipation fins 2112; Liquid cooling plate 22; Coolant conveying component 23; Heat dissipation fan 30; High-heat-generating component 40; Low-heat-generating component 50; DC electrical component 51; Capacitor module 52; Heat dissipation surface 521; AC electrical component 53; Air heat exchanger 60; Cold air vent 61; Hot air vent 62; Reactor 70; Electrical connector 80; Fuse 81; First connector 82; Second connector 83. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are preferred embodiments of the present invention and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and accompanying drawings of this invention is for distinguishing different objects and not for describing a specific order.

[0038] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this invention, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to 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 limiting the specific scope of protection of this invention.

[0039] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this invention should be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection by other means or components.

[0040] In the claims, description and accompanying drawings of this invention, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0041] See Figure 1-7 , Figure 1-7 A power cabinet is shown, including a cabinet 10, a heat exchange device 20, a cooling fan 30, an air heat exchanger 60, a reactor 70, and an electrical connector 80.

[0042] See Figure 1-4 The cabinet 10 is rectangular in shape. Along a first direction, the cabinet 10 has a first sidewall 11 and a second sidewall 12 that are parallel and opposite to each other. Along a second direction perpendicular to the first direction, the cabinet 10 has a first abutment wall 13 and a second abutment wall 14 that are parallel and opposite to each other. The first direction is... Figure 3 The middle direction is up and down, and the second direction is... Figure 3 The center represents the left and right directions.

[0043] In this embodiment, the cabinet 10 is provided with a support plate 15 and a partition plate 16, see [link / reference] Figure 6-7 The support plate 15 divides the cabinet 10 into an upper region and a lower region. The upper region forms an air passage cavity 10A. The partition plate 16 divides the lower region into a middle region and a bottom region. The middle region forms a protective cavity 10B, and the bottom region forms a heat dissipation cavity 10C. That is, the top of the cabinet 10 has an air passage cavity 10A, and the bottom has a heat dissipation cavity 10C. The cabinet 10 has a protective cavity 10B between the air passage cavity 10A and the heat dissipation cavity 10C. The protective cavity 10B is relatively sealed. The support plate 15 extends horizontally, and the partition plate 16 is Z-shaped. The partition plate 16 is formed by two horizontal sections and one vertical section. The vertical section connects the two horizontal sections to form the Z-shaped partition plate.

[0044] 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 along the air intake direction. Figure 7 (middle left) and second zone ( Figure 7 (Right side), the first zone is higher than the second zone, and the partition plate 16 also makes the protective cavity 10B form a connected third zone along the air inlet direction ( Figure 7 (middle left) and fourth zone ( Figure 7(Right side of the middle section), with the third and fourth sections located above the first and second sections, respectively. It should be understood that both the support plate 15 and the partition plate 16 should be sealed to the side panels of the cabinet 10, thus making the protective cavity 10B relatively independent and sealed. This relative independence and sealing of the protective cavity 10B means that it has a high level of protection (waterproof and dustproof), and also means that the internal structure of the protective cavity 10B does not encroach on other cavities (air passage cavity and heat dissipation cavity), such as the air duct of the heat dissipation cavity 10C extending into the protective cavity. Therefore, the protective cavity 10B has sufficient space for the installation of the heating components described below, ensuring that the heating components are not easily affected by the heat radiation from the electrical components and can form a layout most conducive to heat dissipation, thereby improving the heat dissipation efficiency of the heating components.

[0045] See Figure 1-2 The air passage cavity 10A has a main air intake 111 on the first side wall 11 along the first horizontal direction, and an exhaust 101 on the top, which is close to the second side wall 12. The air passage cavity 10A also has a first air intake 131 and a second air intake 141 on the first abutting wall 13 and the second abutting wall 14, respectively. That is, the side of the air passage cavity 10A also has a first air intake 131 and a second air intake 141 facing each other along the second horizontal direction.

[0046] See Figure 2 The protective cavity 10B has a third air inlet 123 on the second side wall 12. (See also...) Figure 6-7 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 far away from the main air inlet 111 and close to the second side wall 12. In this embodiment, the air outlet 151 is opened on the support plate 15.

[0047] See Figure 7 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 a first air outlet 121 and a second air outlet 122 on the second side wall 12; the first air inlet 112 and the first air outlet 121 are connected to form a first air duct 01, and the second air inlet 113 and the second air outlet 122 are connected to form a second air duct 02.

[0048] Specifically, see Figure 6-7An inner partition 17 is provided within the heat dissipation cavity 10C between the first air outlet 121 and the second air outlet 122 to divide the heat dissipation cavity 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. An airflow outlet 171 is provided on the inner partition 17 to connect the first air inlet 112 and the first air outlet 121. A portion of the first air duct 01 is formed between the first air inlet 112 and the airflow outlet 171, and another portion of the first air duct 01 is formed between the airflow outlet 171 and the first air outlet 121. The portion of the upper air outlet chamber 10D outside the first air duct 01 forms a second air duct 02. Therefore, a portion of the first air duct 01 is located within the second air duct 02. (See also...) Figure 1-2 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, which are connected to the air outlet 171.

[0049] In this embodiment, the cabinet 10 is provided with a cover 18, one end of which is connected to the first air inlet 112 and the other end is connected to the air outlet 171 to form part of the first air duct 01. The projection of the cover 18 along the second direction is L-shaped and has a horizontal section and a vertical section.

[0050] In a preferred embodiment, the cover 18 is located in the first region of the heat dissipation cavity 10C, and an air passage gap is formed between the cover 18 and the first abutment wall 13 and the second abutment wall 14. The inner surface of the heat dissipation cavity 10C facing away from the second side wall 12 is provided with an air guide surface 161 facing the cover 18 and parallel to the first side wall 11. An air passage gap is formed between the air guide surface 161 and the cover 18, and it is vertically spaced from the inner partition 17. A heat insulation gap 03 exists between the top surface of the cover 18 and the cavity wall of the heat dissipation cavity 10C. The air passage gap between the cover 18 and the air guide surface 161 can also achieve a heat insulation function, and is also a heat insulation gap 03. In this embodiment, the surface of the vertical section of the partition 16 facing the first side wall 11 forms the air guide surface 161.

[0051] See also Figure 7 The first air inlet 112 and the first air outlet 121 are located at the upper and lower ends of the heat dissipation cavity 10C, respectively. 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 higher than the second air outlet 122.

[0052] Specifically, in this embodiment, the cabinet 10 includes a fan module 19 corresponding to the heat dissipation cavity 10C. The fan module 19 is mounted 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 volume supplied to the first air inlet 112 is greater than the air volume supplied to the second air inlet 113. In this embodiment, the fan module 19 includes a first fan 191 opposite to the first air inlet 112 and a second fan 192 opposite to the second air inlet 113. Both the first fan 191 and the second fan 192 are air supply fans, and the power of the first fan 191 is greater than the power of the second fan 192. The fan module 19 is mounted on the first side wall 11, and compared with being mounted on the second side wall 12, the temperature of the fan module 19 will not be very high, thus making the fan less prone to damage.

[0053] The heat exchanger 20 is at least partially located within the air passage 10A, specifically, see [link to relevant documentation]. Figure 6 The heat exchange device 20 includes an air-liquid heat exchanger 21 placed in the air passage 10A and a liquid cooling plate 22 placed in the protective cavity 10B to dissipate heat from the high-heat-generating component 40. The air-liquid heat exchanger 21 is connected to the inlet and outlet of the liquid cooling plate 22, thereby supplying cool liquid to the liquid cooling plate 22 and recovering hot liquid from the liquid cooling plate, realizing liquid cooling circulation. See also Figure 4-5 The air-liquid heat exchanger 21 has two heat exchange sections located in the air passage 10A. The two heat exchange sections are arranged at an angle, with one end of each section intersecting each other along the first direction and the other end of each section forming an opening away from each other. Each heat exchange section has a section to be cooled and several air passages. Each air passage is adapted to allow air to pass in the horizontal direction. Specifically, the heat exchange section is a heat exchange plate 211 extending in the vertical direction. The heat exchange plate 211 is inclined relative to both the first and second directions. The two heat exchange plates 211 are combined to form a V-shape. The V-shaped opening faces the second side wall 12. The end of the two heat exchange plates 211 that intersects each other is close to the main air inlet 111. The heat exchange plate 211 extends in the vertical direction and is alternately provided with coolant flow channels and air passages in the vertical direction. Each coolant flow channel forms a section to be cooled. The coolant flow channel extends along the length of the heat exchange plate 211. The air passage is adapted to allow air to pass in the horizontal direction. Figure 5 In the process, the coolant flow channel is formed by a liquid cooling pipe 2111 extending along the length of the heat exchange fin 211, and serrated heat dissipation fins 2112 are provided in the air duct to increase heat dissipation efficiency; still referring to Figure 4The projections of the first air inlet 131 and the second air inlet 141 along the second direction cover the projection of the heat exchange plate 211 along the second direction. It should be understood that the heat exchange device 20, in addition to the air-liquid heat exchanger 21 and the liquid cooling plate 22, also includes other components such as the coolant delivery component 23. The coolant delivery component 23 can be a pump, a water tank, and water pipes, etc. This part is prior art and will not be described in detail in this embodiment. Since the ends where the two heat exchange plates 211 intersect are close to the main air inlet 111, placing the coolant delivery component 23 of the heat exchange device 20 in the area between the two heat exchange plates 211 not only makes full use of the space between the two heat exchange plates 211, but also allows maintenance of the coolant delivery component 23 only at the open ends of the two heat exchange plates 211. Furthermore, since the airflow first dissipates heat from the heat exchange plates 211 and then from the coolant delivery component 23, the heat dissipation efficiency of the heat exchange plates 211 is ensured. The heat exchange fins 211 are inclined relative to both the first and second directions, ensuring that each heat exchange fin 211 has a large air passage area while having a small volume.

[0054] In this embodiment, the coolant channels of the two heat exchange plates 211 are connected in parallel through the coolant delivery component 23. That is, the liquid inlet of each heat exchange plate 211 is the hottest liquid that has just come out of the liquid cooling plate 22 (the temperature difference between the liquid inside the heat exchange plate 211 and the outside cold air is the largest, and the heat exchange effect is the best). At the same time, only half of the total system flow is on each heat exchange plate 211, which greatly reduces the system flow resistance. This not only increases the heat exchange efficiency of the heat exchange plate 211, but also reduces the system flow resistance.

[0055] A cooling fan 30 is positioned at the exhaust port 101 to drive airflow through the intake port 111 and into the exhaust port 101. The vertical projection of the cooling fan 30 is spaced apart from the two heat exchange fins 211 along a first direction, ensuring that the airflow passes completely through the airflow duct of the heat exchange fins 211. It should be understood that in this embodiment, the cooling fan 30 is an exhaust fan and should have a high protection level.

[0056] In this embodiment, the main exhaust vent 111 is located on the side of the air passage cavity 10A, and the exhaust vent 101 is located at the top of the air passage cavity 10A. Since the hot air density is low, the hot air discharged from the top of the air passage cavity 10A mainly flows upwards and not downwards, thus avoiding heat flow disturbance to the main exhaust vent 111 of the downstream power cabinet. Based on this, when a heat exchange device 20 is placed inside the air passage cavity 10A, the two heat exchange plates of a conventional heat exchange device 20 are inclined relative to the vertical direction. The fan is positioned above the area between the two heat exchange plates. During fan operation, the airflow direction changes after passing through the heat exchange plates. Because the liquid cooling pipes inside the heat exchange plates extend along their length, when the heat exchange plates are inclined relative to the vertical direction, the air ducts of the heat exchange plates are also inclined relative to the vertical direction. After the fan operates, the airflow direction changes after passing through the air ducts, and the airflow from the two heat exchange sections blows against each other. Therefore, sand is easily trapped under the influence of gravity and airflow at the inner and outer angles of the bottom of the two heat exchange sections and within the air ducts of the heat exchange sections. Sand accumulation and increased air resistance after long-term operation significantly affect heat exchange efficiency. This embodiment addresses this issue by placing the exhaust vent 101 at the top of the cabinet 10. Specifically, the two heat exchange sections are arranged at an angle, with one end intersecting along the first direction and the other end forming an opening. The airflow through the heat exchange section 211 is horizontal, resulting in low resistance. Airflow from the main exhaust vent 111 can directly blow away the accumulated sand from the airflow through the duct. Since the opening formed by the angle between the two heat exchange sections is horizontal, sand is less likely to accumulate at the angle. Simultaneously, heat exchange between the airflow through the duct and the coolant flow channel is facilitated. In other words, this embodiment avoids heat flow to the main exhaust vent 111 of the downstream power cabinet when multiple power cabinets are arranged side-by-side along the first direction, and also prevents sand accumulation on the heat exchange section 211 when air is exhausted from the top, thus improving the heat exchange efficiency after long-term operation.

[0057] In this embodiment, the placement of the first air inlet 131 and the second air inlet 141 facilitates faster removal of heat from the coolant channels of the two heat exchange fins 211, thereby improving the heat exchange efficiency of the heat exchange fins 211. The side walls of the cabinet 10 other than the first side wall 11 and the second side wall 12, namely the first abutting wall 13 and the second abutting wall 14, do not require air intake or exhaust and require no maintenance. Therefore, these side walls can be used to connect with other cabinets 10 without affecting the operation, heat dissipation, and maintenance of the power cabinet itself. When multiple power cabinets are connected in parallel along the second direction, only the outermost first air inlet 131 and second air inlet 141 can receive air. Due to air pressure limitations, the air passage cavity 10A of the power cabinet located in the middle will not receive air through the first air inlet 131 and the second air inlet 141.

[0058] See also Figure 6-7The heating element is placed inside the protective cavity 10B and includes a high-heat-generating component 40 and a low-heat-generating component 50. The high-heat-generating component 40 is cooled by a liquid-cooled plate 22. In this embodiment, the high-heat-generating component 40 is an inverter module, so the water pipe of the air-liquid heat exchanger 21 also passes through the support plate 15 and communicates with the liquid-cooled plate 22. The low-heat-generating component 50 includes a DC electrical component 51, an AC electrical component 53, and a capacitor module 52. The DC electrical component 51 is located near the first side wall 11, and the AC electrical component 53 is located near the second side wall 12 at the bottom of the protective cavity 10B and 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 below the high-heat-generating component 40. The lower surface of the capacitor module 52 is provided with a heat dissipation surface 521 parallel to the horizontal direction.

[0059] The high-heat-generating component 40 is located above the fourth zone. The DC electrical component 51 is located in the third zone, the AC electrical component 53 is located in the fourth zone, and the capacitor module 52 spans the third and fourth zones and is vertically positioned between the AC electrical component 53 and the high-heat-generating component 40. The electrical connections within the protective cavity 10B are as follows: 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.

[0060] In this embodiment, the air-liquid heat exchanger 21 of the heat exchange device 20 is placed in the air passage 10A at the top. Therefore, the air inlet of the heat exchange device 20 is also located at the top. The air inlet is far from the ground and has a lower air inlet temperature, which makes the heat dissipation efficiency of the air-liquid heat exchanger 21 high, thereby ensuring that the high heat-generating component 40 has a high heat dissipation efficiency. Since the air-liquid heat exchanger 21 has no water inlet concerns, the air outlet can be opened at the top of the cabinet 10, so that when multiple power cabinets are used in parallel, it is not easy to cause heat flow disturbance to the downstream power cabinet. Since the air-liquid heat exchanger 21 is placed at the top, the side of the cabinet 10 is not occupied, which facilitates the parallel operation of multiple power cabinets or their side-by-side use in the horizontal direction.

[0061] An 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 inlet 61 for supplying cold air to the protective cavity 10B and a hot air inlet 62 for recovering hot air from the protective cavity 10B. The hot air inlet 62 and the cold air inlet 61 are both facing the first side wall 11, and the hot air inlet 62 is higher than the cold air inlet 61. In actual application, an exhaust fan is also installed at the hot air inlet 62. The axis of the exhaust fan is parallel to the first direction. The air heat exchanger 60 is provided with a first airflow channel and a second airflow channel. The first airflow channel connects the third air inlet 123 and the air outlet 151. The second airflow channel is provided with a cold air inlet 61 and a hot air inlet 62. The cooling fan 30 also drives the air to flow from the third air inlet 123 through the air outlet 151 to the exhaust outlet 101. The first airflow channel and the second airflow channel exchange heat with each other to remove the heat from the second airflow channel. The hot air vent 62 is higher than the cold air vent 61. As the cold air from the air heat exchanger 60 flows upward in the protective cavity 10B, it can gradually remove the heat from the heating components inside the protective cavity 10B, resulting in good airflow circulation. The air heat exchanger 60 is mounted on the inner surface of the second side wall 12, which is more aesthetically pleasing than mounting it on the outer surface of the second side wall 12. If the air heat exchanger 60 is mounted on the outer surface of the second side wall 12, the hot air from the first airflow channel can easily flow into the main air vent 111 of the downstream cabinet 10.

[0062] In this embodiment, the air heat exchanger 60 and the air-liquid heat exchanger 21 share the same cooling fan 30, and thus share the same exhaust port 101. This ensures that the hot air generated by the protective cavity 10B is discharged from the exhaust port 101 at the top of the cabinet 10. As a result, when multiple power cabinets are used side by side along the first direction, the hot air from the exhaust port 101 of the upstream power cabinet will not affect the main exhaust port 111 of the downstream power cabinet.

[0063] The high-heat-generating component 40 is located near the hot air outlet 62 of the air heat exchanger 60. Therefore, the cold airflow from the cold air outlet 61 of the air heat exchanger 60 can first carry away the heat from the low-heat-generating component 50 within the protective cavity 10B, and then carry away the heat from the high-heat-generating component 40, thus ensuring the heat dissipation efficiency of the low-heat-generating component 50. The high-heat-generating component 40 is located below the hot air outlet 62, resulting in low resistance during hot air recirculation. Furthermore, because the density of hot air in the airflow is less than that of air, the cold air is below the hot air when passing the high-heat-generating component 40 during recirculation, allowing the air heat exchanger 60 to dissipate heat for both the low-heat-generating component 50 and the high-heat-generating component 40 simultaneously.

[0064] The capacitor module 52 in the low-heat-generating component 50 generates the most heat. 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 facilitates wiring. The cold air from the air heat exchanger 60 flows through the AC electrical component 53, the capacitor module 52, and the DC electrical component 51, then passes through the high-heat-generating component 40 and is returned to the hot air outlet 62. Since the AC electrical component 53 generates little heat, the cold air remains at a low temperature after passing through it, thus effectively carrying away the heat from the capacitor module 52. As the DC electrical component 51 is close to the first side wall 11, its heat can radiate outward through the first side wall 11, resulting in high heat dissipation efficiency for the low-heat-generating component 50.

[0065] In this embodiment, the lower surface of the capacitor module 52 is provided with a heat dissipation surface 521 parallel to the horizontal direction. This facilitates the electrical coupling between the upper surface of the capacitor module 52 and the high-heat-generating component 40, and also allows the cool air to better dissipate heat from the capacitor module 52. An air gap is formed between the liquid cooling plate 22 and the upper surface of the capacitor module 52. The airflow velocity in the air gap is the fastest, allowing the cool air to simultaneously remove heat from both the capacitor module 52 and the high-heat-generating component 40. Since the capacitor module 52 is basically horizontally positioned, the airflow can circulate around the entire capacitor module 52, resulting in high heat dissipation efficiency. Furthermore, the capacitor module 52 can guide the airflow to the DC electrical component 51, which is away from the cold air outlet 61 of the air heat exchanger 60, thereby improving the heat dissipation efficiency of the DC electrical component 51.

[0066] In this embodiment, the electrical components within the protective cavity 10B are primarily cooled by liquid cooling and air cooling. The high-heat-generating component 40 is cooled by liquid cooling, which is highly efficient. The low-heat-generating component 50 is cooled by air cooling. Since both the air heat exchanger 60 and the air-liquid heat exchanger 21 utilize external circulation for cooling, the protective properties of the protective cavity 10B are significantly improved. The high-heat-generating component 40 is located near the hot air outlet 62 of the air heat exchanger 60. Therefore, the cold airflow from the cold air outlet 61 of the air heat exchanger 60 can first remove the heat from the low-heat-generating component 50 within the protective cavity 10B, and then remove the heat from the high-heat-generating component 40, thus ensuring the efficient cooling of the low-heat-generating component 50. This combined liquid cooling and air cooling maximizes the cooling efficiency of the heat-generating components within the protective cavity 10B, resulting in excellent protection for the cavity.

[0067] See Figure 7The electrical components include a reactor 70 and an electrical connector 80. The reactor 70 extends vertically and is placed within the first air duct 01. The reactor 70 is located in the upper air outlet chamber 10D, primarily within the vertical section of the enclosure 18. A passage gap is formed between the reactor 70 and the vertical section of the enclosure 18. This passage gap should be understood as being solely for airflow; no other heat-generating components can be placed within it. The horizontal section of the enclosure 18 is also solely for airflow. In other words, the reactor 70 is placed in the first zone. The reactor 70 is placed in the first air duct 01 of the heat dissipation cavity 10C. This is because the reactor 70 is relatively heavy, providing better load-bearing capacity when placed at the bottom of the cabinet 10. Furthermore, it ensures that the hot air discharged from the first air outlet 121 of the first air duct 01 is kept as far away as possible from the third air inlet 123. The trajectory of the hot air from the first air outlet 121 is parabolic, thus preventing the hot air generated by the reactor 70 from turbulently affecting the cold airflow of the third air inlet 123. The reactor 70 is located in the upper air outlet chamber 10D, which separates the reactor 70 from the ground through the lower air outlet chamber 10F, thus preventing the reactor 70 from being affected by ground heat radiation.

[0068] Because a gap is formed between the cover 18 and the first abutting wall 13 and the second abutting wall 14, it is beneficial for the cold airflow from the second air inlet 113 to pass through the outside of the cover 18, which increases the airflow velocity. After the cold airflow reaches the air guide surface 161, it collides with the air guide surface 161, and the flow velocity increases further. The airflow that collides with the air guide surface 161 flows downward along the outside of the cover 18, thereby carrying away the heat radiated from the reactor 70 to the cover 18, and further improving the heat dissipation efficiency of the reactor 70. Since the air guide surface 161 and the inner partition 17 are spaced in the vertical direction, the airflow that does not collide with the air guide surface 161 continues to flow to the second air outlet 122.

[0069] A heat insulation gap 03 exists between the top surface of the enclosure 18 and the cavity wall of the heat dissipation cavity 10C. This heat insulation gap 03 cooperates with the air passage gap between the enclosure 18 and the air guide surface 161, reducing the heat conduction efficiency between the enclosure 18 and the partition plate 16. This prevents the heat from the reactor 70 from dissipating into the protective cavity 10B through radiation, further avoiding any impact on the electrical components inside the protective cavity 10B. This improves the overall heat dissipation efficiency of the cabinet 10, making it less likely for the heat from the reactor 70 to be transferred upwards through thermal radiation.

[0070] Electrical connector 80 is at least partially located within the second air duct 02. Electrical connector 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 for connection to the AC electrical component 53. Because 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 are located on the side of the reactor 70 along the second direction near the first sidewall 11, and the second connector 83 is located on the other side of the reactor 70 along the second direction near the second sidewall 12. This facilitates the wiring operations of the first connector 82 and the DC electrical component 51, as well as the wiring operations of the second connector 83 and the AC electrical component 53, and also facilitates the wiring operations of the fuse 81, the first connector 82, and the second connector 83. The fuse 81 is located near 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 wire passage hole for the DC electrical component 51 to extend can be opened at the bottom end of the first side wall 11, and a wire passage hole for the AC electrical component 53 to extend can also be opened at the bottom end of the second side wall 12.

[0071] In this embodiment, the reactor 70 is placed inside the first air duct 01, and the electrical connector 80 is at least partially located inside the second air duct 02. Since the first air inlet 112 and the first air outlet 121 of the first air duct 01 are located at the upper and lower ends of the heat dissipation cavity 10C respectively, and 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, with the second air inlet 113 being higher than the second air outlet 122, the first air inlet 112 is further from the ground than the second air inlet 113. The inlet temperature of the first air inlet 112 is lower than the temperature of the second air inlet 113, allowing the cooler airflow to dissipate heat from the reactor 70. Since the heat generated by the reactor 70 is greater than the heat generated by the electrical connector 80, the temperature of the first air outlet 121 is higher than the temperature of the second air outlet 122. Because the first air outlet 121 is located at the lower end of the heat dissipation cavity 10C, therefore, in When multiple power cabinets are used side-by-side along the first direction, the hot air from the first air outlet 121 moves upward in a basically parabolic trajectory, which is unlikely to affect the first air inlet 112 and the second air inlet 113 of the downstream adjacent power cabinets. At the same time, the reactor 70 is placed in a separate first air duct 01, and the airflow in the first air duct 01 is greater than that in the second air duct 02, so the heat of the reactor 70 is more concentrated and can be quickly carried away, resulting in high heat dissipation efficiency. The heat radiation to the electrical connector 80 is also small, so the heat dissipation efficiency of the electrical connector 80 is also high. Among them, the electrical connector 80 is at least partially located in the second air duct 02, and the electrical connector 80 can dissipate heat through the second air duct 02, resulting in high heat dissipation efficiency. Since the heat generation of the electrical connector 80 is low, during the heat dissipation process, the second air duct 02 can also carry away the heat of the first air duct 01, thereby further improving the heat dissipation efficiency of the reactor 70. Furthermore, the reactor 70 and the electrical connector 80 are located in an independent heat dissipation cavity 10C. The hot air flowing through the reactor 70 and the electrical connector 80 is directly discharged without interfering with other electrical components. It can be seen that in this embodiment, the power cabinet is easily paralleled. The reactor 70 and the electrical connector 80 are respectively located in the first air duct 01 and the second air duct 02. By placing the first air inlet 112 and the first air outlet 121 at the upper and lower ends of the heat dissipation cavity 10C, the cold air temperature of the reactor 70 is low, resulting in high heat dissipation efficiency. At the same time, the hot air from the reactor 70, i.e., the hot air from the first air outlet 121, is brought as close to the ground as possible to avoid affecting the downstream power cabinet. Combined with the independent first air duct 01 for the reactor 70, the heat dissipation efficiency of the reactor 70 is greatly improved. Placing the low-heat electrical connector 80 in the second air duct 02 with a small airflow not only meets the heat dissipation requirements of the electrical connector 80 but also provides auxiliary heat dissipation for the reactor 70.

[0072] 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, which are connected to the air outlet 171 of the air passage 151. This allows the hot air flowing through the reactor 70 to flow out not only through the first air outlet 121, but also through the third air outlet 132 and the fourth air outlet 142. This reduces the amount of hot air at the first air outlet 121 and makes it less likely to interfere with the first air inlet 112 and the second air inlet 113 of the downstream power cabinet. It should be understood that the first abutting wall 13 and the second abutting wall 14 are both 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 third air outlet 132 and the fourth air outlet 142 located on the outermost side will vent air. The third air outlet 132 and the fourth air outlet 142 of the power cabinet located in the middle will not vent air out due to the larger air pressure of the adjacent power cabinet.

[0073] With this configuration, the hot air from the entire power cabinet is exhausted from the top exhaust vent 101 and the bottom first exhaust vent 121, minimizing turbulence on the intake air of downstream power cabinets. In this embodiment, the high-heat-generating component 40 is placed in the fourth zone, and the reactor 70 is placed in the first zone, arranged roughly diagonally to the reactor 70. This keeps the two high-heat-generating electrical components as far apart as possible, further improving heat dissipation efficiency. Furthermore, the DC electrical component 51 is placed in the third zone, the AC electrical component 53 is placed in the fourth zone, and the capacitor module 52 spans both the third and fourth zones, which also facilitates wiring. A liquid-cooled unit is housed within the air passage cavity 10A. This liquid-cooled unit may be at risk of leakage. A protective cavity 10B is located between the air passage cavity 10A and the heat dissipation cavity 10C. Because the protective cavity 10B is relatively independent and sealed, it completely separates the air passage cavity 10A from the heat dissipation cavity 10C. Therefore, the relatively sealed protective cavity 10B improves its own protection, preventing leakage from the air passage cavity 10A from entering the protective cavity 10B. Furthermore, it acts as a partition to prevent leakage from entering the heat dissipation cavity 10C, thereby preventing damage to electrical components. Regarding the leakage problem between the liquid-cooled unit and the pipes of the liquid-cooled plate 22, this can be addressed by improving the protective properties of the connecting pipes, which is beyond the scope of this application. The leakage problem of the liquid-cooled unit discussed in this application mainly concerns the leakage problem of the portion of the liquid-cooled unit within the air passage cavity 10A.

[0074] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this invention, but does not constitute a limitation on the scope of protection of this invention. Modifications, equivalent substitutions, or other improvements to the embodiments of this invention or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this invention or the foregoing embodiments, in conjunction with common knowledge, general technical knowledge, and / or existing technology, should all be included within the scope of protection of this invention.

Claims

1. A power cabinet, characterized in that, include The cabinet (10) has an air passage cavity (10A) on its top, and a main air intake (111) is opened on the side of the air passage cavity (10A) along a first horizontal direction, and an exhaust port (101) is provided on the top. A heat exchange device (20) is provided with two heat exchange sections located within an air passage cavity (10A); the two heat exchange sections are arranged at an angle, with one end of each other intersecting along a first direction and the other ends of each other forming an opening; each heat exchange section is provided with a cooling section and several air passages, each air passage being adapted to allow air to pass in a horizontal direction; and The cooling fan (30) drives the airflow through the air inlet (111) to the exhaust outlet (101) via the air duct.

2. The power cabinet as described in claim 1, characterized in that, The side of the air passage (10A) is also provided with a first air inlet (131) and a second air inlet (141) facing each other along a second horizontal direction perpendicular to the first direction; the heat exchange part is a heat exchange plate (211) extending in a vertical direction, and the heat exchange plate (211) is inclined relative to both the first and second directions.

3. A power cabinet as described in claim 2, characterized in that, The heat exchange plate (211) is provided with alternating coolant channels and air passages along the vertical direction, and each coolant channel forms the part to be cooled; the ends of the two heat exchange plates (211) that intersect each other are close to the main air inlet (111); the heat exchange device (20) is also provided with a coolant conveying component (23) located between the two heat exchange plates (211) and used to convey coolant.

4. A power cabinet as described in claim 3, characterized in that, The projections of the first air inlet (131) and the second air inlet (141) along the second direction cover the projection of the heat exchange plate (211) along the second direction; the cooling fan (30) is installed at the exhaust port (101) and its projection along the vertical direction on the horizontal plane is spaced apart from the two heat exchange plates (211) along the first direction.

5. A power cabinet as described in claim 4, characterized in that, The coolant channels of the two heat exchange fins (211) are connected in parallel through the coolant delivery component (23).

6. A power cabinet as described in claim 5, characterized in that, It also includes a heating element; the cabinet (10) is also provided with a relatively sealed and independent protective cavity (10B) below the air passage cavity (10A); the heat exchange device (20) is also provided with a liquid cooling plate (22) for dissipating heat for at least part of the heating element; the liquid inlet and outlet of the liquid cooling plate (22) are connected to two heat exchange plates (211) through the coolant delivery component.

7. A power cabinet as described in claim 6, characterized in that, It also includes an air heat exchanger (60); the cabinet (10) is further provided with an air outlet (151) connecting the protective cavity (10B) and the air passage cavity (10A); the air outlet (151) is away from the main air intake (111); the cabinet (10) is provided with a first side wall (11) and a second side wall (12) that are parallel to each other and opposite to each other along a first direction, the main air intake (111) is located on the first side wall (11), the exhaust port (101) is close to the second side wall (12), and the protective cavity (10B) is located on the second side wall (12). The protective cavity (10B) is provided with a third air inlet (123) on the second side wall (12); the air heat exchanger (60) is provided with a first airflow channel and a second airflow channel, the first airflow channel is connected to the third air inlet (123) and the air outlet (151), the second airflow channel is provided with a cold air outlet (61) for supplying cold air to the protective cavity (10B) and a hot air outlet (62) for recovering hot air from the protective cavity (10B); the first airflow channel and the second airflow channel exchange heat with each other to remove the heat of the second airflow channel.

8. A power cabinet as described in claim 7, characterized in that, It also includes electrical components, including a reactor (70) extending in a vertical direction; the bottom of the cabinet (10) is also provided with a heat dissipation cavity (10C), the upper end of the heat dissipation cavity (10C) is provided with a first air inlet (112) on the first side wall (11), the lower end of the heat dissipation cavity (10C) is provided with a first air outlet (121) on the second side wall (12), the first air outlet (121) is away from the third air inlet (123), and the first air inlet (112) and the first air outlet (121) are connected to form a first air duct (01); the reactor (70) is placed in the first air duct (01).

9. A power cabinet as described in claim 8, characterized in that, It also includes a cover (18); the cabinet (10) is provided with a partition (16), the upper surface and the lower surface of the partition (16) respectively form the cavity walls of the protective cavity (10B) and the heat dissipation cavity (10C); The cover (18) is placed over the reactor (70) and connects the first air inlet (112) and the first air outlet (121) to form the first air duct (01); there is a heat insulation gap (03) between the cover (18) and the partition plate (16).

10. A power cabinet as described in claim 9, characterized in that, The heating component includes a high-heating component (40) and a low-heating component (50), the liquid cooling plate (22) is used to dissipate heat for the high-heating component (40); the air heat exchanger (60) is used to dissipate heat for the low-heating component (50); The partition plate (16) causes the heat dissipation cavity (10C) to form a first zone and a second zone connected along the air intake direction, the first zone being higher than the second zone, and the reactor (70) being placed in the first zone; The partition plate (16) also causes the protective cavity (10B) to form a connected third zone and a fourth zone along the air inlet direction, the third zone and the fourth zone being located above the first zone and the second zone respectively, and the high-heat-generating element (40) being located above the fourth zone.

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