A power cabinet

Abstract

This invention discloses a power cabinet, including a cabinet body and a first heating element. The bottom of the cabinet body has a heat dissipation cavity, and the side of the heat dissipation cavity has a first air inlet and a first air outlet. The first air inlet and the first air outlet are connected to form a first air duct. The first air inlet is higher than the first air outlet and farther from the ground. The first air duct has a vertically extending receiving section and a passing section connecting the first air inlet and the input end of the receiving section. The passing section is only used for airflow. The first heating element extends vertically and is placed within the receiving section of the first air duct, forming a passing gap with the duct wall of the first air duct. Its top end is not higher than the input end of the receiving section to allow the airflow from the first air inlet to carry away the heat from the first heating element from top to bottom. The first heating element of this application has high heat dissipation efficiency and is less likely to adversely affect the airflow into the cabinet above the heat dissipation cavity or the airflow into the downstream power cabinet.

Description

Technical Field

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

[0002] Power cabinets such as photovoltaic inverters and energy storage converters typically include reactors. These reactors have high heat dissipation requirements, and due to their weight, they are generally placed at the bottom of the power cabinet. Power cabinets are usually used in combination, with several cabinets connected in parallel to form a power group, and multiple power groups arranged side-by-side. Currently, the heat dissipation method for reactors in power cabinets is mostly air cooling, as described in patent CN111465289A. Figure 1 The reactor module 8 is placed at the bottom of the cabinet, directly below the air inlet of the first air duct 24. Cool air flows through the reactor module 8, carrying away heat, and then exits the cabinet 1 through the first air duct 24. In this design, the first air duct 24, used for cooling the reactor module 8, extends into the main protection area, occupying space within the main protection area and causing the DC disconnect switches on both sides of the first air duct 24 to... Figure 1 (left side of the middle section) and capacitor busbar module ( Figure 1 The connection of the right-hand side section is inconvenient, and because the wall of the first air duct 24 can be made of sheet metal with good thermal conductivity, the sealing level is poor, resulting in air leakage. Furthermore, the heat from the reactor 8 is radiated through the wall of the first air duct 24 into the main protection area, raising the temperature of the main protection area 2. In addition, the power cabinet may be used outdoors, where the ground temperature is sometimes high. Therefore, the cold air entering from the bottom may be at a higher temperature. This heat dissipation method may allow hot air from the ground to enter the reactor, resulting in poor heat dissipation efficiency. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned defects or problems in the background art and to provide a power cabinet whose first heat-generating element has high heat dissipation efficiency and is not likely to affect the air intake of the cabinet above the heat dissipation cavity or the air intake of the downstream power cabinet.

[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] Technical Solution 1: A power cabinet includes a cabinet body with a heat dissipation cavity at its bottom. The side of the heat dissipation cavity has a first air inlet and a first air outlet, which are connected to form a first air duct. The first air inlet is higher than the first air outlet and far from the ground. The first air duct has a vertically extending receiving section and a passing section connecting the first air inlet and the input end of the receiving section. The passing section is only used for air passage. A first heating element extends vertically and is placed within the receiving section of the first air duct, forming an air passage gap with the duct wall of the first air duct. Its top end is not higher than the input end of the receiving section to allow the airflow from the first air inlet to carry away the heat of the first heating element from top to bottom.

[0006] Based on technical solution one, technical solution two is also provided. Technical solution two further includes a second heating element with a heat generation less than that of the first heating element; the side of the heat dissipation cavity is also provided with a second air inlet and a second air outlet located on the same surface as the first air inlet. 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. The second 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 is at least partially located in the second air duct.

[0007] Based on technical solution two, there is also technical solution three. In technical solution three, the air volume of the first air inlet is greater than that of the second air inlet. The heat dissipation cavity is provided with a first sidewall and a second sidewall that are parallel to each other and opposite to each other along the first direction. The first air inlet and the second air inlet are both located on the first sidewall, and the first air outlet and the second air outlet are both located on the second sidewall.

[0008] Based on technical solution three, technical solution four is also provided. In technical solution four, an inner partition is provided in the heat dissipation cavity between the first air outlet and the second air outlet to divide the heat dissipation cavity into an upper air outlet chamber corresponding to the first air inlet, the second air inlet and the second air outlet, and a lower air outlet chamber corresponding to the first air outlet. An air flow port is provided on the inner partition to connect the first air inlet and the first air outlet. The air flow port forms the output end of the receiving section of the first air duct. The air flow port and the first air outlet form another part of the first air duct. The first heating element is located in the upper air outlet chamber. The part of the upper air outlet chamber outside the first air duct forms the second air duct.

[0009] Based on technical solution four, there is also technical solution five. In technical solution five, the cabinet is provided with a first abutting wall and a second abutting wall that are parallel to each other and opposite to each other along a second direction perpendicular to the first direction. The lower air outlet chamber also forms a third air outlet and a fourth air outlet on the first abutting wall and the second abutting wall that are connected to the air flow outlet.

[0010] Based on technical solution five, there is also technical solution six. In technical solution six, the cabinet is provided with a cover, one end of which is connected to the first air inlet and the other end is connected to the air outlet. The projection of the cover along the second direction is L-shaped and has a horizontal section and a vertical section. The horizontal section forms the air passage section of the first air duct, and the vertical section forms the receiving section of the first air duct.

[0011] Based on technical solution six, there is also technical solution seven. In technical solution seven, air passage gaps are formed between the cover and the first abutting wall and the second abutting wall. The inner surface of the heat dissipation cavity away from the second side wall is provided with an air guide surface facing the cover and parallel to the first side wall. The air guide surface forms an air passage gap with the cover and is spaced vertically from the inner partition.

[0012] Based on technical solution seven, there is also technical solution eight, in which a heat insulation gap exists between the top surface of the cover and the cavity wall of the heat dissipation cavity.

[0013] Based on technical solution eight, technical solution nine is also provided. In technical solution nine, the second heating element includes a fuse, a first connector and a second connector. The fuse and the first connector are located on the side of the first heating element along the second direction near the first sidewall, and the second connector is located on the other side of the first heating element along the second direction near the second sidewall. The fuse is close to the second air inlet, and 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.

[0014] Based on technical solution nine, technical solution ten is also provided. In technical solution ten, the cabinet includes a fan module. The fan module is installed on the first side wall and is used to supply air to the first air inlet and the second air inlet, and the air supply volume to the first air inlet is greater than the air supply volume to the second air inlet.

[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 come to the conclusion that the technical problem of "low heat dissipation efficiency of the first heat-generating component and interference with the heat dissipation of other electrical components" in the existing technical solution is due to the following points: First, the airflow used to dissipate heat from the first heat-generating component may be hot air from the ground; Second, the hot air flowing through the first heat-generating component may interfere with other electrical components through radiation or other means.

[0017] In technical solution one, "ground" should be understood as the supporting surface of the power cabinet; the air passage section is only used for air passage, meaning that no other heat-generating components will be placed in the air passage section; the "air passage gap" should be understood as only used for air passage, and no other heat-generating components can be placed in the air passage gap.

[0018] The first air inlet is higher than the first air outlet and farther from the ground. The first heating element extends vertically and is placed within the receiving section of the first air duct, forming an air passage gap with the duct wall. Its top end is not higher than the input end of the receiving section to allow the airflow from the first air inlet to carry away the heat of the first heating element from top to bottom. This design keeps the first air inlet away from the ground, preventing hot air from entering the first air duct when the ground temperature is high, ensuring that the airflow entering the first air duct is cold air away from the ground. Furthermore, since the air passage section is only used for air passage, the air passage gap between the first heating element and the duct wall of the first air duct concentrates the heat of the first heating element. Therefore, the cold airflow from the first air inlet flows directly to the first heating element and carries it away from top to bottom. The heat from the first heating element is quickly carried away by the airflow through the air gap due to its high flow rate, resulting in high heat dissipation efficiency. Furthermore, because the first air outlet is closer to the ground, its low position causes the hot air to move upwards in a near-parabolic trajectory. This prevents hot air from entering the air inlet on the same surface as the heat dissipation cavity above the outlet, thus avoiding interference with heat dissipation. It also minimizes the impact on the air inlets of downstream adjacent power cabinets when multiple power cabinets are used horizontally side-by-side. Additionally, the first heating element is located in an independent heat dissipation cavity, allowing the hot air flowing through it to be directly discharged without interfering with other electrical components. Therefore, in this technical solution, the first heating element has a low-temperature cold air component and high heat dissipation efficiency. Simultaneously, the hot air from the first outlet is positioned as close to the ground as possible to avoid affecting the air inlets on the same surface as the outlet above the heat dissipation cavity or downstream power cabinets.

[0019] In technical solution two, the second air inlet and the first air inlet are located on the same surface, making the air inlets of the cabinet relatively concentrated, which is beneficial for the overall layout design of the cabinet, especially when multiple power cabinets are used side by side in a horizontal direction. The second heating element is at least partially located in the second air duct. Since both the second air inlet and the second air outlet are located between the first air inlet and the first air outlet, and the second air inlet is higher than the second air outlet, the first air inlet is farther from the ground than the second air inlet, and the second air outlet is farther from the ground than the first air outlet. The inlet temperature of the first air inlet is lower than that of the second air inlet, and the outlet temperature of the first air outlet is higher than that of the second air outlet. In this way, the cooler airflow can dissipate heat for the first heating element, and the slightly cooler airflow can dissipate heat for the second heating element. The hotter airflow is closer to the ground, and the slightly hotter airflow is farther from the ground. This arrangement is effective when the heat output of the first heating element is greater than that of the second heating element. This design ensures that both the first and second heating elements have high heat dissipation efficiency. Furthermore, since the hot air from the first air outlet is hotter than that from the second air outlet, the hot air from the second outlet can carry the hot air from the first outlet upwards. Because the hot air discharged from both the first and second air outlets is located at the bottom of the cabinet, it prevents hot air from flowing into the first and second air outlets when the cabinet has an air inlet on the same surface above the heat dissipation cavity. This also minimizes the impact on the air inlets of downstream adjacent power cabinets when multiple power cabinets are used side-by-side horizontally. The second heating element is at least partially located within the second air duct, allowing it to dissipate heat efficiently. Due to the lower heat output of the second heating element, the second air duct also carries away heat from the first air duct during the heat dissipation process, further improving the heat dissipation efficiency of the first heating element. The first and second heating elements are located in independent heat dissipation cavities, and the hot air flowing through them is directly discharged without interfering with other electrical components.

[0020] In technical solution three, the side walls of the cabinet other than the first and second side walls do not require air inlets or outlets or maintenance. Therefore, these side walls can be used to connect with other cabinets or to be used side-by-side at intervals along a first direction perpendicular to the horizontal, without affecting the operation, heat dissipation, or maintenance of the power cabinet itself. Since the cold air temperature at the first air inlet is lower than that at the second air inlet, the airflow at the first air inlet is greater than that at the second air inlet. This further enhances the heat dissipation efficiency of the first heating element and reduces heat radiation to the second heating element, thus also increasing its heat dissipation efficiency. Furthermore, it also ensures that the airflow at the first air outlet is greater than that at the second air outlet, allowing the hot air from the first outlet to carry the hot air from the second outlet in a parabolic trajectory, thus moving it away from other air inlets above the heat dissipation cavity or the air inlets of downstream power cabinets. Placing the less heat-generating second heating element within a smaller airflow duct satisfies its heat dissipation needs and also provides auxiliary heat dissipation for the first heating element.

[0021] In technical solution four, the first air duct is formed by two parts, upper and lower. The first heating element is located in the upper air outlet chamber, which separates the first heating element from the ground through the lower air outlet chamber. This avoids the first heating element being affected by ground heat radiation and also helps to place the first air outlet at the bottom of the heat dissipation cavity.

[0022] In technical solution five, the lower air outlet chamber also forms a third air outlet and a fourth air outlet on the first and second abutment walls, which are connected to the airflow outlet. This allows the hot air flowing through the first heating element to flow out not only through the first air outlet but also through the third and fourth air outlets, thereby reducing the amount of hot air at the first air outlet and making it less likely to interfere with the first and second air inlets of the downstream power cabinet. It should be understood that both the first and second abutment walls are suitable for use when paralleled with other power cabinets. When multiple power cabinets are paralleled along the second direction to form a power group, only the outermost third and fourth air outlets will discharge air. The third and fourth air outlets of the power cabinets in the middle will not discharge air due to the higher air pressure of the adjacent power cabinets.

[0023] In technical solution six, the cabinet is equipped with a cover to ensure the formation of the air passage section and the containment section of the first air duct.

[0024] In technical solution seven, air gaps are formed between the cover and both the first and second abutting walls, which facilitates an increase in the flow velocity of the cold airflow from the second air inlet as it passes through the cover. After the cold airflow reaches the air guide surface, it collides with the air guide surface, further increasing its flow velocity. The airflow that collides with the air guide surface flows downward along the outside of the cover, thereby carrying away the heat radiated from the first heating element to the cover, further improving the heat dissipation efficiency of the first heating element. Since the air guide surface and the inner partition are vertically spaced, the airflow that does not collide with the air guide surface continues to flow towards the second air outlet.

[0025] In technical solution eight, there is a heat insulation gap between the top surface of the cover and the cavity wall of the heat dissipation cavity. This heat insulation gap is matched with the air passage gap between the cover and the air guide surface, so that the heat of the first heating element is not easily transferred upward through heat radiation, further avoiding the impact on other electrical components.

[0026] In technical solution nine, 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. The fuse and the first connector are close to the first side wall, and the second connector is close to the second side wall, which ensures the heat dissipation of the fuse. Furthermore, the first connector and the second connector are close to the first side wall and the second side wall, respectively, which is beneficial for external wiring. The fuse is close to the second air inlet, and the first connector is located below the fuse, which is beneficial for wiring and heat dissipation. The first connector and the second connector extend through the inner partition into the lower air outlet chamber, which is beneficial for wiring operations.

[0027] In technical solution ten, the fan module is installed on the first side wall. Compared with the fan module being installed on the second side wall, the temperature of the fan module will not be very high, thus making the fan less prone to damage. Attached Figure Description

[0028] 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.

[0029] Figure 1 This is a schematic diagram of the existing technology;

[0030] Figure 2 This is a schematic diagram of the power cabinet according to an embodiment of the present invention. Figure 1 ;

[0031] Figure 3 This is a schematic diagram of the power cabinet according to an embodiment of the present invention. Figure 2 ;

[0032] Figure 4 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.

[0033] Figure 5 This is a schematic diagram of the internal structure of the power cabinet according to an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the interior of the hidden portion of the power cabinet in an embodiment of the present invention.

[0035] Explanation of key figure labels:

[0036] 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 1 51; partition plate 16; air guide surface 161; inner partition plate 17; air outlet 171; cover 18; fan module 19; first fan 191; second fan 192; heat insulation gap 03; heat exchange device 20; air-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 component 70; second heating component 80; fuse 81; first connector 82; second connector 83. Detailed Implementation

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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."

[0042] See Figure 2-6 , Figure 2-6 A power cabinet is shown, including a cabinet body 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.

[0043] See Figure 2-4 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 4 The middle direction is up and down, and the second direction is... Figure 4 The center represents the left and right directions.

[0044] In this embodiment, the cabinet 10 is provided with a support plate 15 and a partition plate 16, see [link / reference] Figure 5-6 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.

[0045] 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 6 (middle left) and the second zone ( Figure 6 (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 6 (middle left) and fourth zone ( Figure 6 (Right side of the middle), the third and fourth zones are located above the first and second zones respectively.

[0046] See 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 exhaust outlet 101 on the top, which is close to the second side wall 12. The air passage cavity 10A also has a first air inlet 131 and a second air inlet 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 inlet 131 and a second air inlet 141 arranged opposite to each other along the second direction.

[0047] See Figure 3 The protective cavity 10B has a third air inlet 123 on the second side wall 12. (See also...) 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 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.

[0048] See 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 a first air outlet 121 and a second air outlet 122 on the second side wall 12. The first air inlet 112 is higher than the first air outlet 121 and away from the ground, and 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 support surface of the power cabinet. 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. 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 vertically extending accommodating section and a passing section connecting the first air inlet 112 and the input end of the accommodating section. The passing 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 duct 02. Figure 6 In the heat dissipation cavity 10C, 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 air passage section is only used for air passage, which means that no other heat-generating components will be placed in the air passage section.

[0049] Specifically, see Figure 5-6An 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, connecting the first air inlet 112 and the first air outlet 121. The airflow outlet 171 forms the output end of the receiving section of the first air duct 01, and the area between the airflow outlet 171 and the first air outlet 121 forms another part of the first air duct 01. The portion of the upper air outlet chamber 10D outside the first air duct 01 forms the second air duct 02. Therefore, the first air duct 01 portion is located within the second air duct 02. (See also...) Figure 2-3 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.

[0050] 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, so as 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. The horizontal section forms the air passage section of the first air duct 01, and the vertical section forms the receiving section of the first air duct 01.

[0051] 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.

[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] See Figure 3-6 The heat exchange device 20 includes an air-liquid heat exchanger 21 placed in the air passage cavity 10A and supported by a support plate 15, 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 liquid 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 to achieve liquid cooling circulation. The air-liquid heat exchanger 21 can adopt existing technology, which will not be described in detail here. The exhaust module 30 is placed at the exhaust port 101 to drive the airflow through the air passage 111 to the exhaust port 101. It should be understood that in this embodiment, the exhaust module 30 should have a high protection level. The air-liquid heat exchanger 21 dissipates heat through the main exhaust port 111, the first exhaust port 131, the second exhaust port 141, the exhaust module 30, and the exhaust port 101, resulting in high heat exchange efficiency. When multiple power cabinets are connected in parallel along the second direction, only the outermost first air intake 131 and second air intake 141 can take in air. Due to air pressure limitations, the air passage 10A of the power cabinet located in the middle will not take in air through the first air intake 131 and second air intake 141.

[0054] See also Figure 5-6 The 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. In this embodiment, the lower surface of the capacitor module 52 is provided with a heat dissipation surface 521 parallel to the horizontal direction.

[0055] In this configuration, DC electrical component 51 is located in the third zone, AC electrical component 53 is located in the fourth zone, and capacitor module 52 spans both zones. High-heat component 40 is located above the fourth zone. The electrical connections within the protective cavity 10B are as follows: DC electrical component 51 is connected to capacitor module 52, capacitor module 52 is connected to high-heat component 40, and high-heat component 40 is connected to AC electrical component 53.

[0056] An air heat exchanger 60 is installed on the inner surface of the second side wall 12. The air heat exchanger 60 has 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. Both the hot air inlet 62 and the cold air inlet 61 face the first side wall 11, with the hot air inlet 62 higher than the cold air inlet 61. In practical applications, an exhaust fan is also installed at the hot air inlet 62, with its axis parallel to the first direction. The air heat exchanger 60 has a first airflow channel and a second airflow channel. The first airflow channel connects the third air inlet 123 and the air outlet 151, while the second airflow channel has both the cold air inlet 61 and the hot air inlet 62. The exhaust module 30 also drives 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 heat from the second airflow channel. The high-heat-generating component 40 is located near the hot air inlet 62.

[0057] 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.

[0058] 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 from the air heat exchanger 60 can gradually carry away the heat of the heating components in the protective cavity 10B as it flows upward in the protective cavity 10B, resulting in good airflow circulation. The high-heat-generating component 40 is lower than the hot air outlet 62, so the resistance is small when the hot air returns. Also, since the density of hot air in the airflow is less than that of air, the cold air is below and the hot air is above when it passes the high-heat-generating component 40 during the return flow. This allows the air heat exchanger 60 to dissipate heat for both the low-heat-generating component 50 and the high-heat-generating component 40.

[0059] In this embodiment, the air heat exchanger 60 and the air-liquid heat exchanger 21 share the exhaust module 30, and thus share the 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 in 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. 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 will easily flow into the main exhaust port 111 of the downstream cabinet 10.

[0060] 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.

[0061] 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-heat-generating component 40, but also allows the cool air to better dissipate heat from the capacitor module 52.

[0062] See Figure 6The first heating element 70 extends vertically and is placed within the receiving section of the first air duct 01, forming an air passage gap with the duct wall of the first air duct 01. Its top end is not higher than the input end of the receiving section to allow the airflow from the first air inlet 112 to carry away the heat from the first heating element 70 from top to bottom. The first heating element 70 is located in the upper air outlet chamber 10D, mainly within the vertical section of the cover 18, and its bottom end is higher than the first air outlet 121. That is, the first heating element 70 is placed in the first zone. The "air passage gap" should be understood as being solely for air passage, and no other heating elements may be placed within it. In this embodiment, the first heating element 70 is a reactor. The first heating element 70 is placed in the first air duct 01 of the heat dissipation cavity 10C. This is because the first heating element 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 is as far away as possible from the third air inlet 123, resulting in a parabolic trajectory for the hot air from the first air outlet 121. This prevents the hot air generated by the first heating element 70 from turbulently affecting the cold air inlet 123. The first heating element 70 is located in the upper air outlet chamber 10D, separated from the ground by the lower air outlet chamber 10F, thus avoiding the influence of ground heat radiation on the first heating element 70.

[0063] 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 first heating element 70 to the cover 18, and further improving the heat dissipation efficiency of the first heating element 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.

[0064] Because there is a heat insulation gap 03 between the top surface of the cover 18 and the cavity wall of the heat dissipation cavity 10C, and this heat insulation gap 03 cooperates with the air passage gap between the cover 18 and the air guide surface 161, the heat conduction efficiency between the cover 18 and the partition plate 16 is reduced, thereby preventing the heat of the first heating element 70 from dissipating into the protective cavity 10B through radiation, and further avoiding the impact on the electrical components inside the protective cavity 10B. This improves the heat dissipation efficiency of the entire cabinet 10, making it less likely for the heat of the first heating element 70 to be transferred upwards through thermal radiation.

[0065] The second heating element 80 is at least partially located within the second air duct 02. The heat generated by the second heating element 80 is less than that of 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 for connection with 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 are located on the side of the first heating element 70 along the second direction near the first sidewall 11, and the second connector 83 is located on the other side of the first heating element 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 wiring hole for the DC electrical component 51 to extend can be provided at the bottom end of the first side wall 11, and a wiring hole for the AC electrical component 53 to extend can also be provided at the bottom end of the second side wall 12.

[0066] In this embodiment, the first heating element 70 extends vertically and is placed within the receiving section of the first air duct 01, forming an air passage gap with the duct wall of the first air duct 01. Its top end is not higher than the input end of the receiving section to allow the airflow from the first air inlet 112 to carry away the heat from the first heating element 70 from top to bottom. This keeps the first air inlet 112 away from the ground, preventing hot air from entering the first air duct 01 when the ground temperature is high, ensuring that the airflow entering the first air duct 01 is cold air away from the ground. Furthermore, since the air passage section is only used for air passage, the air passage gap between the first heating element 70 and the duct wall of the first air duct 01 concentrates the heat of the first heating element 70. Therefore, the cold airflow from the first air inlet 112 flows directly to the first heating element 70 and carries away the heat from the first heating element 70 from top to bottom. Heat is drawn from the first heating element 70 quickly as airflow enters the air gap at a relatively high velocity, resulting in high heat dissipation efficiency. Furthermore, because the first air outlet 121 is closer to the ground, its lower position causes the upward trajectory of the hot air exiting the outlet to be essentially parabolic. This prevents hot air from entering the air inlet (third air inlet 123) on the same surface as the first air outlet 121 above the heat dissipation cavity, thus avoiding interference with heat dissipation. It also minimizes the impact on the air inlets of downstream adjacent power cabinets when multiple power cabinets are used side-by-side horizontally. Additionally, the first heating element 70 is located within an independent heat dissipation cavity, allowing the hot air flowing through it to be directly discharged without interfering with other electrical components. As can be seen, 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, i.e. the hot air of the first air outlet 121, is as close to the ground as possible to avoid affecting the air inlet of the cabinet 10 located on the same surface as the first air outlet 121 above the heat dissipation cavity or affecting the downstream power cabinet.

[0067] Furthermore, the second heating element 80 is at least partially located within the second air duct 02. Since both 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, and the second air inlet 113 is higher than the second air outlet 122, the first air inlet 112 is farther from the ground than the second air inlet 113, and the second air outlet 122 is farther from the ground than the first air outlet 121. The inlet temperature of the first air inlet 112 is lower than the temperature of the second air inlet 113, and the outlet temperature of the first air outlet 121 is higher than the outlet temperature of the second air outlet 122. This allows the cooler airflow to dissipate heat from the first heating element 70, and the slightly cooler airflow to dissipate heat from the second heating element 80. The hotter airflow is closer to the ground, and the slightly hotter airflow is farther from the ground. When the heat output of the first heating element 70 is greater than that of the second heating element 80, this arrangement allows both the first heating element 70 and the second heating element 80 to simultaneously have high heat dissipation efficiency. Simultaneously, because... The hot air from the first air outlet 121 is hotter than the hot air from the second air outlet 122, and the hot air from the second air outlet 122 can carry the hot air from the first air outlet 121 upwards. Since the hot air discharged from the first air outlet 121 and the second air outlet 122 of the cabinet 10 are both located at the bottom of the cabinet 10, it avoids the hot air from the first air outlet 121 and the second air outlet 122 flowing into the air inlet when the cabinet 10 has an air inlet on the same surface as the first air outlet 121 and the second air outlet 122 above the heat dissipation cavity. It also makes it less likely to affect the air inlet of the downstream adjacent power cabinet when multiple power cabinets are used side by side in the horizontal direction. The second heating element 80 is at least partially located in the second air duct 02. The second heating element 80 can dissipate heat through the second air duct 02, and the heat dissipation efficiency is high. Since the heat generated by the second heating element 80 is low, the second air duct 02 can also carry away the heat of the first air duct 01 during the heat dissipation process, 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 chambers. The hot air flowing through the first heating element 70 and the second heating element 80 is directly discharged without interfering with other electrical components.

[0068] More preferably, with the cold air temperature at the first air inlet 112 being lower than that at the second air inlet 113, the airflow at the first air inlet 112 is greater than that at the second air inlet 113. This results in the first heating element 70 having higher heat dissipation efficiency and less heat radiation to the second heating element 80, thus also resulting in higher heat dissipation efficiency for the second heating element 80. Furthermore, it also results in the airflow at the first air outlet 121 being greater than that at the second air outlet 122. This allows the hot air from the first air outlet 121 to carry the hot air from the second air outlet 122 along a parabolic trajectory, thus keeping it away from other air inlets above the heat dissipation cavity 10C or the air inlets of the downstream power cabinet. Placing the second heating element 80, which generates less heat, within the second air duct 02 with a smaller airflow not only satisfies the heat dissipation requirements of the second heating element 80 but also provides auxiliary heat dissipation for the first heating element 70.

[0069] 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 first heating element 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.

[0070] 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 air intake of downstream power cabinets. In this embodiment, the high-heat-generating component 40 is placed in the fourth zone, and the first heat-generating component 70 is placed in the first zone, arranged roughly diagonally to the first heat-generating component 70. This keeps the two electrical components with high heat generation 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.

[0071] 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 it comprises: The cabinet (10) has a heat dissipation cavity (10C) at its bottom. The heat dissipation cavity (10C) has a first air inlet (112) and a first air outlet (121) on its side. The first air inlet (112) and the first air outlet (121) are connected to form a first air duct (01). The first air inlet (112) is higher than the first air outlet (121) and farther from the ground. The first air duct (01) has a vertically extending receiving section and a passing section connecting the first air inlet (112) and the input end of the receiving section. The passing section is only used for airflow. The first heating element (70) extends vertically and is placed within the receiving section of the first air duct (01) to form an air passage gap with the air duct wall of the first air duct (01). Its top end is not higher than the input end of the receiving section so that the airflow from the first air inlet (112) can carry away the heat of the first heating element (70) from top to bottom.

2. A power cabinet as described in claim 1, characterized in that, It also includes a second heating element (80) with a heat output lower than that of the first heating element (70); The side of the heat dissipation cavity (10C) is also provided with a second air inlet (113) and a second air outlet (122) located on the same surface as the first air inlet (112). The second air inlet (113) and the second air outlet (122) are connected to form a second air duct (02) and both are located between the first air inlet (112) and the first air outlet (121). The second air inlet (113) is higher than the second air outlet (122). The first air duct (01) is at least partially located in the second air duct (02). The second heating element (80) is placed in the heat dissipation cavity (10C) and is at least partially located in the second air duct (02).

3. A power cabinet as described in claim 2, characterized in that, The air volume of the first air inlet (112) is greater than that of the second air inlet (113). The heat dissipation cavity (10C) is provided with a first sidewall (11) and a second sidewall (12) that are parallel to each other and opposite to each other along the first direction. The first air inlet (112) and the second air inlet (113) are both located on the first sidewall (11), and the first air outlet (121) and the second air outlet (122) are both located on the second sidewall (12).

4. A power cabinet as described in claim 3, characterized in that, An inner partition (17) is provided inside 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); the inner partition (17) is provided with a connection between the first air inlet (112) and the second air outlet (122). The air outlet (171) of the first air outlet (121) forms the output end of the receiving section of the first air duct (01), and the air outlet (171) and the first air outlet (121) form another part of the first air duct (01); the first heating element (70) is located in the upper air outlet chamber (10D); the part of the upper air outlet chamber (10D) outside the first air duct (01) forms the second air duct (02).

5. A power cabinet as described in claim 4, characterized in that, The cabinet (10) is provided with a first abutting wall (13) and a second abutting wall (14) that are parallel to each other and opposite to each other along a second direction perpendicular to the first direction. The lower air outlet chamber 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 to the air outlet (171).

6. A power cabinet as described in claim 5, characterized in that, 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). The projection of the cover (18) along the second direction is L-shaped and has 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 receiving section of the first air duct (01).

7. A power cabinet as described in claim 6, characterized in that, A ventilation gap is formed between the cover (18) and the first abutting wall (13) and the second abutting wall (14); the inner surface of the heat dissipation cavity (10C) away from the second side wall (12) is provided with a guide surface (161) facing the cover (18) and parallel to the first side wall (11), and a ventilation gap is formed between the guide surface (161) and the cover (18) and is spaced apart from the inner partition (17) in the vertical direction.

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

9. A power cabinet as described in claim 8, characterized in that, The first heating element (70) is a reactor, and the second heating element (80) includes a fuse (81), a first connector (82), and a second connector (83). The fuse (81) and the first connector (82) are located on the side of the first heating element (70) along the second direction near the first sidewall (11), and the second connector (83) is located on the other side of the first heating element (70) along the second direction near the second sidewall (12). 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).

10. A power cabinet as described in claim 1, characterized in that, The cabinet (10) includes a fan module (19); 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 to the first air inlet (112) is greater than the air supply to the second air inlet (113).

Images