An inverter cabinet and frequency converter

Abstract

The application provides an inverter cabinet and a frequency converter. The inverter cabinet comprises a cabinet, a water pipeline assembly, a control assembly and at least one liquid-cooled inverter module arranged in the cabinet. A busbar conducting rail assembly is arranged on the first side of the liquid-cooled inverter module, and an output conducting rail assembly is arranged on the second side of the liquid-cooled inverter module. A heat exchanger and a fan are arranged in the liquid-cooled inverter module. The water pipeline assembly is communicated with the heat exchanger through a quick water pipe joint. The control assembly is installed on the cabinet and connected with the liquid-cooled inverter module through a line. The frequency converter comprises the above inverter cabinet. The application can realize quick installation of various devices in the inverter cabinet. When disassembling and maintaining, the liquid-cooled inverter module, the water pipeline assembly and the control assembly can be individually removed only by disassembling the quick water pipe joint and the line. Through reasonable water pipeline and air duct design, heat can be efficiently taken away, the heat dissipation effect of the inverter cabinet during high-power operation is ensured, and the stability and reliability of the equipment are improved.

Description

Technical Field

[0001] This application belongs to the field of electrical equipment technology, and more specifically, relates to an inverter cabinet and a frequency converter. Background Technology

[0002] In existing technologies, traditional inverter cabinets often integrate a large number of electrical components and wiring. The layout of these modules lacks systematic planning, resulting in low space utilization. This not only increases the difficulty of installation but also causes numerous inconveniences for subsequent maintenance and repair. In particular, when equipment malfunctions and requires troubleshooting or replacement of parts, operators often have to spend a lot of time searching for the target device in the complex structure, severely impacting work efficiency. Utility Model Content

[0003] The purpose of this application is to provide an inverter cabinet and a frequency converter to solve the technical problems of complex internal structure layout of cabinets and inconvenient installation and maintenance of device modules in the prior art.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: An inverter cabinet is provided, including a cabinet and a water pipe assembly, a control assembly, and at least one liquid-cooled inverter module disposed within the cabinet; a busbar assembly is disposed on the first side of the liquid-cooled inverter module, and an output busbar assembly is disposed on the second side of the liquid-cooled inverter module; a heat exchanger and a fan are disposed inside the liquid-cooled inverter module; the water pipe assembly is connected to the heat exchanger via a quick-connect water pipe joint; the control assembly is mounted on the cabinet and connected to the liquid-cooled inverter module via a line.

[0005] Furthermore, the cabinet includes a frame and a support frame, the support frame being connected to the frame, and the liquid-cooled inverter module being mounted on the support frame; the bottom of the liquid-cooled inverter module is an air inlet, and the support frame has a hollow area to avoid the air inlet.

[0006] Furthermore, the output bus assembly includes a three-phase output bus and a busbar. One end of the three-phase output bus is connected to the output end of the liquid-cooled inverter module, and the other end of the three-phase output bus passes through the support frame and is connected to the busbar.

[0007] Furthermore, the cabinet also includes a swing door structure assembly, one side of which is hinged to the frame; the swing door structure assembly is provided with the control assembly, which is used to control the liquid-cooled inverter module.

[0008] Furthermore, the swing door structure assembly includes a hinge structure and a movable door. One side of the hinge structure is connected to the frame, and the other side of the hinge structure is connected to the movable door. The movable door is located on the third side of the liquid-cooled inverter module, and the control component is installed on the movable door.

[0009] Furthermore, the water pipeline assembly includes a main inlet pipe, an inlet branch, a main return pipe, and a return branch; one end of the inlet branch is connected to the main inlet pipe, and the other end of the inlet branch is connected to the inlet of the heat exchanger; one end of the return branch is connected to the main return pipe, and the other end of the return branch is connected to the outlet of the heat exchanger.

[0010] Furthermore, the water inlet branch includes a first branch water inlet pipe and a second branch water inlet pipe, which are connected by a first quick water pipe connector; the water return branch includes a first branch water return pipe and a second branch water return pipe, which are connected by a second quick water pipe connector.

[0011] Furthermore, the first quick water pipe connector includes a male connector and a female connector that are detachably connected to each other, and both the male connector and the female connector are provided with valves; when the male connector and the female connector are separated, the valves are closed; when the male connector and the female connector are connected, the valves are open.

[0012] Furthermore, the inverter cabinet also includes a fuse and a common-mode filter magnetic ring; the input terminal of the fuse is connected to the busbar conductor assembly; the input terminal of the common-mode filter magnetic ring is connected to the output terminal of the fuse.

[0013] This application also provides a frequency converter, which includes the inverter cabinet described above.

[0014] The advantages of the inverter cabinet and frequency converter provided in this application are as follows: Compared with the prior art, the inverter cabinet of this application integrates the heat exchanger and fan inside the liquid-cooled inverter module. It also features a busbar assembly on the first side of the liquid-cooled inverter module, an output busbar assembly on the second side, as well as water piping and control components. Therefore, during installation, only the liquid-cooled inverter module, water piping assembly, and control components need to be installed. Furthermore, during connection, the water piping assembly is connected to the heat exchanger via quick-connect water pipes, and the control components are connected to the liquid-cooled inverter module via wiring. This allows for rapid installation of the components within the inverter cabinet. During disassembly and maintenance, only the quick-connect water pipes and wiring need to be removed to individually remove the liquid-cooled inverter module, water piping assembly, and control components. During installation, the connection paths of each component are clear, allowing operators to quickly and accurately complete wiring and securing work, thus reducing installation difficulty. When maintenance and repair are required, the clearly defined locations and rational layout of each module allow operators to quickly locate the target device without repeatedly searching through complex structures, significantly reducing maintenance time. In particular, the liquid-cooled inverter module integrates a heat exchanger and fan, connected to a water piping system. Through a well-designed water and air duct system, heat is efficiently dissipated, ensuring effective heat dissipation during high-power operation and improving equipment stability and reliability. The output busbar assembly ensures smooth power output. The compact overall structure and coordinated operation of all parts effectively solve the technical problems of complex internal cabinet layouts and inconvenient installation and maintenance of device modules in existing technologies. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a front view of the structural layout of the inverter cabinet provided in an embodiment of this application;

[0017] Figure 2 This is a side view of the structural layout of the inverter cabinet provided in an embodiment of this application;

[0018] Figure 3 A schematic diagram of the water pipe assembly in the inverter cabinet provided in this embodiment of the application;

[0019] Figure 4 This is a diagram showing the internal airflow in an inverter cabinet provided in an embodiment of this application.

[0020] Figure 5Detailed diagram of the swing door structure component in the inverter cabinet provided in the embodiments of this application;

[0021] Figure 6 A detailed view of the support frame in the inverter cabinet provided in the embodiment of this application.

[0022] The following are the labeling elements in the figure:

[0023] 100 - Server rack; 101 - Frame; 102 - Support bracket;

[0024] 200-Fuse;

[0025] 300-Common-Mode Filtering Magnetic Ring;

[0026] 400 - Liquid-cooled inverter module; 401 - Heat exchanger; 402 - Fan;

[0027] 500 - Water pipe assembly; 501 - Main inlet pipe; 502 - Main return pipe; 531 - First branch inlet pipe; 532 - Second branch inlet pipe; 541 - First branch return pipe; 542 - Second branch return pipe; 505 - First quick water pipe connector; 506 - Second quick water pipe connector;

[0028] 600 - Output busbar assembly; 601 - Three-phase output busbar; 602 - Busbar;

[0029] 701 - Positive busbar conductor; 702 - Negative busbar conductor;

[0030] 800 - Screw door structural component; 801 - Hinge structural component; 802 - Movable door. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0032] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0033] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0035] Please refer to the following: Figure 1 and Figure 2 The inverter cabinet provided in this application embodiment will now be described. The inverter cabinet includes a cabinet 100 and a water pipe assembly 500, a control component, and at least one liquid-cooled inverter module 400 disposed within the cabinet 100. A busbar assembly is disposed on the first side of the liquid-cooled inverter module 400, and an output busbar assembly 600 is disposed on the second side. A heat exchanger 401 and a fan 402 are disposed inside the liquid-cooled inverter module 400. The water pipe assembly 500 is connected to the heat exchanger 401 via a quick-connect water pipe joint. The control component is mounted on the cabinet 100 and connected to the liquid-cooled inverter module 400 via wiring.

[0036] Compared with the prior art, the inverter cabinet provided in this application integrates the heat exchanger 401 and fan 402 inside the liquid-cooled inverter module 400. It also features a busbar assembly on the first side of the liquid-cooled inverter module 400, an output busbar assembly 600 on the second side, a water pipe assembly 500, and a control assembly. Therefore, during installation, only the liquid-cooled inverter module 400, the water pipe assembly 500, and the control assembly need to be installed. Furthermore, during connection, the water pipe assembly 500 is connected to the heat exchanger 401 via a quick-connect water pipe, and the control assembly is connected to the liquid-cooled inverter module 400 via wiring. This allows for rapid installation of the components within the inverter cabinet. During disassembly and maintenance, only the quick-connect water pipe and wiring need to be removed to individually remove the liquid-cooled inverter module 400, the water pipe assembly 500, and the control assembly. The connection paths of each component are clear during installation, allowing operators to quickly and accurately complete wiring and securing work, thus reducing installation difficulty. When maintenance and repair are required, the clear location and reasonable layout of each module allow operators to quickly locate the target device without repeatedly searching through complex structures, significantly reducing maintenance time. In particular, the liquid-cooled inverter module 400 integrates the heat exchanger 401 and fan 402, connected to the water pipe assembly 500. Through a rational water and air duct design, it efficiently removes heat, ensuring effective heat dissipation during high-power operation and improving equipment stability and reliability. The output busbar assembly 600 ensures smooth power output. The overall structure is compact, with all parts working collaboratively, effectively solving the technical problems of complex internal layout of the cabinet 100 and inconvenient installation and maintenance of device modules in existing technologies.

[0037] In one embodiment of this application, please refer to the following: Figure 2 and Figure 6 The cabinet 100 includes a frame 101 and a support frame 102. The support frame 102 is connected to the frame 101. The liquid-cooled inverter module 400 is installed on the support frame 102. The bottom of the liquid-cooled inverter module 400 is an air inlet. The support frame 102 has a hollow area to avoid the air inlet.

[0038] In this embodiment, the frame 101 serves as the main support structure of the cabinet 100, providing a stable framework foundation for the entire inverter cabinet and ensuring structural stability when bearing the weight of each component. The connection between the support bracket 102 and the frame 101 can be achieved by bolting or welding, ensuring connection strength while facilitating positional adjustments based on the dimensions of the liquid-cooled inverter module 400. After the liquid-cooled inverter module 400 is installed on the support bracket 102, its bottom air inlet faces the perforated area on the support bracket 102. This design allows external air to enter the liquid-cooled inverter module 400 without obstruction through the perforated area, providing a smooth airflow channel for the fan 402 and effectively preventing reduced heat dissipation efficiency due to obstructed airflow. Simultaneously, the perforated area reduces the overall weight of the support bracket 102, achieving lightweight design while maintaining structural strength, meeting the requirements of modern electrical equipment for compact structure and high energy efficiency.

[0039] Specifically, the frame 101 can be made of nine-fold profile. The nine-fold profile has high structural strength and rigidity, which can provide stable and reliable support for the cabinet 100. At the same time, its standardized cross-section design facilitates the installation and positioning of various components. It can be quickly assembled into the frame 101 by means of bolt connection or riveting to meet the structural requirements of cabinets 100 of different specifications.

[0040] In one embodiment of this application, please refer to Figure 6 The output busbar assembly 600 includes a three-phase output busbar 601 and a busbar 602. One end of the three-phase output busbar 601 is connected to the output end of the liquid-cooled inverter module 400, and the other end of the three-phase output busbar 601 passes through the support frame 102 and is connected to the busbar 602.

[0041] In this embodiment, the three-phase output busbar 601 efficiently outputs the three-phase AC power converted by the liquid-cooled inverter module 400. Its precise connection to the output terminal of the liquid-cooled inverter module 400 ensures initial stability of power transmission, while its other end passes through the support frame 102 and connects to the busbar 602, forming a clear and short conductive path. Appropriate openings or slots can be provided on the support frame 102 at the positions where the three-phase output busbar 601 passes through. These not only limit and fix the busbar, preventing displacement due to vibration during equipment operation, but also reduce unnecessary contact between the busbar and other components, lowering the risk of short circuits. The busbar 602, as a key node for power collection and distribution, aggregates the three-phase output current from multiple liquid-cooled inverter modules 400 and outputs it uniformly, effectively solving the current convergence problem when multiple modules are connected in parallel, and ensuring the uniformity and stability of the output current.

[0042] In one embodiment of this application, please refer to the following: Figure 1 and Figure 2 The cabinet 100 also includes a swing door structure assembly 800, one side of which is hinged to the frame 101; the swing door structure assembly 800 is equipped with a control assembly for controlling the liquid-cooled inverter module 400.

[0043] In this embodiment, the hinged design of the swing door structure component 800 and the frame 101 allows the swing door to rotate flexibly, providing operators with a convenient operating angle. When maintenance or parameter adjustment of the liquid-cooled inverter module 400 is required, simply rotating the swing door outward to the appropriate position allows direct access to the control components mounted on the movable door 802, without needing to penetrate deep into the cabinet 100, effectively reducing operational difficulty. Simultaneously, the control components are integrated into the swing door structure component 800, making the control section relatively independent yet closely connected to the main body of the liquid-cooled inverter module 400. This shortens the connection distance of the control lines, reduces signal interference, and facilitates individual maintenance or replacement of the control module, further enhancing the overall practicality and ease of operation of the inverter cabinet.

[0044] In one embodiment of this application, please refer to Figure 5 The swing door structure assembly 800 includes a hinge structure 801 and a movable door 802. One side of the hinge structure 801 is connected to the frame 101, and the other side of the hinge structure 801 is connected to the movable door 802. The movable door 802 is located on the third side of the liquid-cooled inverter module 400, and the control component is installed on the movable door 802.

[0045] In this embodiment, the design of the movable door 802 located on the third side of the liquid-cooled inverter module 400 allows the operator to directly face the liquid-cooled inverter module 400 after opening the door, with an unobstructed view, facilitating real-time observation of the operating status of the liquid-cooled inverter module 400, such as indicator light displays, abnormal sounds, or leaks. The hinge structure 801, as a key component connecting the frame 101 and the movable door 802, is firmly connected to the frame 101 on one side and tightly integrated with the movable door 802 on the other, providing reliable support for the flexible rotation of the movable door 802. The control components are installed on the movable door 802, making control operations more intuitive and convenient. Operators can control the liquid-cooled inverter module 400 by starting, stopping, and adjusting parameters from the front of the cabinet 100 using the control components on the movable door 802. Furthermore, the rotational characteristics of the movable door 802 simplify the installation, wiring, and maintenance of the control components, eliminating the need to delve into the complex internal space of the cabinet 100, further optimizing the human-machine interface and improving the overall ease of operation and maintenance efficiency of the equipment.

[0046] The placement of the movable door 802 not only ensures that operators can directly observe the operating status of the liquid-cooled inverter module 400 during maintenance, but also achieves stable rotation through its cooperation with the hinge structure 801.

[0047] Specifically, the hinge structure 801 can adopt a long-row hinge structure, the length of which can be customized according to the size of the sliding door 802. The long-row hinge structure is flexible in rotation and has a strong load-bearing capacity, ensuring that the sliding door 802 is subjected to uniform force during rotation, further reducing the sinking and twisting phenomenon on the non-hinge installation side. The long-row hinge structure can meet the maximum rotation angle of 180°, which can fully meet the requirement of maintaining the liquid-cooled inverter module 400 without disassembling the sliding door 802; it can effectively reduce the maintenance difficulty of the liquid-cooled inverter module 400 and reduce maintenance costs.

[0048] In one embodiment of this application, please refer to the following: Figure 2 and Figure 3 The water pipe assembly 500 includes a main inlet pipe 501, an inlet branch, a main return pipe 502, and a return branch; one end of the inlet branch is connected to the main inlet pipe 501, and the other end of the inlet branch is connected to the inlet of the heat exchanger 401; one end of the return branch is connected to the main return pipe 502, and the other end of the return branch is connected to the outlet of the heat exchanger 401.

[0049] In this embodiment, the main inlet pipe 501 serves as the main input terminal of the water system, stably receiving external coolant. The coolant is then precisely distributed to the inlet of the heat exchanger 401 via inlet branches, ensuring uniform coolant flow into the heat exchange area. After heat exchange is completed, the coolant carrying heat flows through the outlet into the return branch, ultimately converging at the main return pipe 502 for discharge, forming a complete and efficient coolant circulation path. This branched water system design not only shortens the coolant's flow distance within the cabinet, reducing pressure loss, but also allows for flexible adjustment of the flow rate of each branch according to the heat dissipation needs of different areas, further optimizing heat dissipation efficiency and ensuring stable heat dissipation performance of the liquid cooling system under various operating conditions.

[0050] In one embodiment of this application, please refer to Figure 3 The water inlet branch includes a first branch water inlet pipe 531 and a second branch water inlet pipe 532, which are connected by a first quick water pipe connector 505; the water return branch includes a first branch water return pipe 541 and a second branch water return pipe 542, which are connected by a second quick water pipe connector 506.

[0051] In this embodiment, the first quick-connect water pipe joint 505 and the second quick-connect water pipe joint 506 enable modular splicing of the inlet and return water branches, greatly simplifying the installation and disassembly process of the water pipe assembly 500. During equipment assembly, operators can quickly and accurately connect the first branch inlet pipe 531 and the second branch inlet pipe 532, and the first branch return pipe 541 and the second branch return pipe 542 without the need for complex tools, effectively improving production assembly efficiency. Furthermore, during later maintenance or pipe replacement, the quick-connect joints allow for rapid separation of the branch pipes, facilitating the inspection or replacement of specific pipes, reducing maintenance downtime, and improving maintenance efficiency.

[0052] In this embodiment, the first branch water inlet pipe 531, the second branch water inlet pipe 532, the first branch water return pipe 541, and the second branch water return pipe 542 all use crimped hoses. Crimped hoses have good flexibility and corrosion resistance, enabling them to adapt to the complex spatial layout inside the cabinet 100, while effectively resisting the chemical corrosion that may result from long-term coolant flushing. The crimped connection method ensures the sealing of the pipe interfaces, preventing coolant leakage and further guaranteeing the stable operation of the water system.

[0053] In one embodiment of this application, the first quick water pipe connector 505 includes a male connector and a female connector that are detachably connected to each other, and both the male connector and the female connector are provided with valves; when the male connector and the female connector are separated, the valves are closed; when the male connector and the female connector are connected, the valves are open.

[0054] In this embodiment, the interlocking design of the valves inside the male and female connectors enables automatic on / off control of the water circuit. When the male and female connectors are separated, their internal valves remain closed, effectively preventing coolant leakage during disassembly. This protects the cleanliness of the equipment's internal environment and reduces coolant waste and safety hazards. Once the male and female connectors are properly connected, the valves open synchronously upon connection, automatically opening the water circuit and ensuring smooth coolant flow without the need for manual operation, further enhancing operational convenience and reliability. This structural design is particularly suitable for liquid-cooled systems with high requirements for sealing and operational efficiency, providing strong support for the stable operation of high-power liquid-cooled inverter cabinets.

[0055] In this embodiment, the structure of the second quick-connect water pipe joint 506 is the same as that of the first quick-connect water pipe joint 505, and it also has the characteristic of detachable connection between the male and female connectors. Furthermore, the linkage control logic of the internal valves is completely consistent with that of the first quick-connect water pipe joint 505. When the male and female connectors of the second quick-connect water pipe joint 506 are in a separated state, the valves inside both automatically close, effectively preventing coolant leakage during the disassembly of the relevant pipelines. After the male and female connectors are successfully connected, the valves open simultaneously, ensuring smooth flow of coolant in the corresponding water circuit.

[0056] Understandably, most existing inverter cabinets control the flow of water through valves, which means that liquid-cooled inverters need to have the coolant drained through valves during regular maintenance or long-term storage, making the maintenance process extremely cumbersome and inconvenient.

[0057] In this embodiment, the use of a first quick-connect water pipe connector 505 and a second quick-connect water pipe connector 506 effectively solves the above-mentioned problems. During periodic disassembly and maintenance, taking advantage of the characteristic that both ends of the first quick-connect water pipe connector 505 and the second quick-connect water pipe connector 506 can be disconnected without leakage, the liquid-cooled inverter module 400 and one end of the first quick-connect water pipe connector 505 and the second quick-connect water pipe connector 506 can be removed from the cabinet together for maintenance without the need for drainage, which is convenient and quick.

[0058] In one embodiment of this application, there are multiple liquid-cooled inverter modules 400, multiple water inlet branches, and multiple water return branches; the liquid-cooled inverter modules 400, water inlet branches, and water return branches are configured in a one-to-one correspondence.

[0059] In this embodiment, the independent configuration of multiple liquid-cooled inverter modules 400 allows the inverter cabinet to flexibly expand or reduce its operational quantity according to actual power requirements, improving equipment adaptability and energy utilization efficiency. Each liquid-cooled inverter module 400 undergoes cooling circulation through dedicated inlet and return water branches, effectively avoiding the uneven flow distribution problem that may occur when multiple modules share pipelines. This ensures that each inverter module receives a stable supply of cooling medium, thereby guaranteeing its heat dissipation effect and operational stability under high load conditions. Simultaneously, this one-to-one pipeline design facilitates independent maintenance of individual liquid-cooled inverter modules 400. When a particular inverter module requires maintenance, simply closing its corresponding inlet and return water branch valves allows the maintenance operation to be completed without affecting the normal operation of other inverter modules, significantly improving the convenience of equipment maintenance and the continuity of overall operation.

[0060] Specifically, the number of liquid-cooled inverter modules 400 can be determined based on the dimensions of the rack 100. For example, a single liquid-cooled inverter module 400 can be placed in a 400mm wide rack 100, two liquid-cooled inverter modules 400 can be placed in a 600mm wide rack 100, and three liquid-cooled inverter modules 400 can be placed in an 800mm wide rack 100. Each liquid-cooled inverter module 400 in the rack 100 can be connected to a load individually, or multiple liquid-cooled inverter modules 400 can be connected to a load after being paralleled. Furthermore, when the power demand exceeds that of a single liquid-cooled inverter module 400, multiple standardized inverter cabinets can be installed in parallel to achieve greater power expansion. The modular and standardized design of the inverter cabinets makes the expansion of high-power rack systems as simple and convenient as building with building blocks.

[0061] In one embodiment of this application, the liquid-cooled inverter module 400 further includes a bus capacitor module, an IGBT module, and an output current-sharing reactor. These core components, along with the heat exchanger 401 and fan 402, form a highly integrated modular structure. The bus capacitor module stabilizes the DC bus voltage and absorbs the ripple current generated during the switching process of the IGBT module, reducing the impact of voltage fluctuations on the system. The IGBT module, as the core switching device of the inverter circuit, achieves efficient DC-to-AC conversion through precise control signals, and its performance directly determines the output power and conversion efficiency of the inverter cabinet. The output current-sharing reactor effectively suppresses harmonic components in the output current, improves the output waveform quality, and plays a current-sharing role when multiple modules are connected in parallel, ensuring balanced load on each module and improving the overall system stability and reliability. This integrated design not only significantly reduces the module size and shortens the internal wiring length, reducing line losses and electromagnetic interference, but also facilitates rapid device replacement and maintenance, further optimizing the overall performance of the inverter cabinet.

[0062] Compared to externally mounted heat exchanger 401, integrating it into the liquid-cooled inverter module 400 significantly simplifies the internal structure of the inverter cabinet, reduces the use of water connection devices and pipes, lowers cabinet costs, and shortens the cabinet production cycle. By dissipating heat within the cabinet through the internal heat exchanger 401, the operating environment of various components and modules within the cabinet is optimized and improved, extending the overall service life.

[0063] The heat exchanger 401 has ample heat dissipation margin, not only meeting the heat dissipation needs of the liquid-cooled inverter module 400 itself, but also allowing the remaining heat dissipation capacity to be used for cooling other components inside the cabinet, thereby improving the internal ambient temperature and extending the lifespan of the internal components. By directly placing the liquid-cooled inverter module 400, which integrates the heat exchanger 401 and fan 402, inside the cabinet, the internal air circulation duct design is essentially completed within the cabinet. Compared to the case where the water-air heat exchanger 401 is externally placed in the cabinet, this method results in a simpler cabinet structure design and a shorter completion cycle. The airflow within the cabinet is driven by the fan 402, specifically as follows... Figure 4 As shown, fan 402 drives airflow to circulate inside cabinet 100. Hot airflow inside cabinet 100 enters the liquid-cooled inverter module 400 through the perforated area on the support frame 102. Inside the liquid-cooled inverter module 400, it first passes through heat exchanger 401, exchanging heat with the cold water introduced into heat exchanger 401. The cooled airflow then absorbs heat from the internal environment of the liquid-cooled inverter module 400, becoming hot air before flowing out of the liquid-cooled inverter module 400. After passing outside, it re-enters the liquid-cooled inverter module 400 through the perforated area, thus completing the cycle. Furthermore, the number of fans 402 can be increased inside the cabinet to improve airflow rate, thereby further enhancing the heat dissipation efficiency inside the cabinet.

[0064] In one embodiment of this application, please refer to Figure 1 The inverter cabinet also includes a fuse 200 and a common-mode filter magnetic ring 300; the input terminal of the fuse 200 is connected to the busbar conductor assembly; the input terminal of the common-mode filter magnetic ring 300 is connected to the output terminal of the fuse 200.

[0065] In this embodiment, the fuse 200 is used to quickly disconnect the circuit in case of overload or short circuit, protecting the safety of subsequent electrical components (such as the common-mode filter magnetic ring 300, liquid-cooled inverter module 400, etc.) and preventing damage to components or even safety accidents caused by excessive current. Its input terminal is connected to the input busbar assembly, providing the first line of safety protection against externally input current. When the current exceeds a set threshold, the fuse element inside the fuse 200 melts, thereby disconnecting the circuit and preventing the fault from spreading.

[0066] In this embodiment, the common-mode filter magnetic ring 300 is used to suppress common-mode interference. By exhibiting high impedance characteristics to common-mode current, it effectively attenuates common-mode noise signals generated in the circuit due to external electromagnetic radiation or the operation of internal components. Its input terminal is connected to the output terminal of the fuse 200, which further filters the current after it passes through the fuse 200, reducing the impact of common-mode interference on core components such as the subsequent liquid-cooled inverter module 400. This improves the stability of the liquid-cooled inverter module 400 and the overall electromagnetic compatibility of the inverter cabinet, ensuring that the inverter cabinet can still operate reliably in complex electromagnetic environments.

[0067] In one embodiment of this application, please refer to Figure 1 The input busbar assembly includes a positive busbar 701 and a negative busbar 702. The positive and negative busbars 701 and 702 are arranged parallel to each other and fixed together by insulating supports to ensure electrical safety distance in high-voltage operating environments. One end of the positive busbar 701 is connected to the positive terminal of an external DC power supply, and the other end is connected to the input terminal of a fuse 200. One end of the negative busbar 702 is connected to the negative terminal of an external DC power supply, and the other end is also connected to the input terminal of the fuse 200, forming a complete DC input circuit. This dual-busbar structure design effectively distributes the current load, reduces the temperature rise of the busbars, and reduces losses during power transmission. The insulating supports are made of high-strength epoxy fiberglass cloth, possessing excellent insulation performance and mechanical strength. They not only reliably isolate the positive and negative busbars 702 to prevent short-circuit accidents but also bear the weight of the busbars and connecting components, ensuring the structural stability of the entire input busbar assembly.

[0068] The main circuit topology of the inverter cabinet provided in this embodiment is as follows: DC power is input from the top through the positive busbar 701 and the negative busbar 702, flows through the fuse 200 and the common mode filter magnetic ring 300 to the DC input terminal of the liquid-cooled inverter module 400, and then flows from the AC output terminal of the liquid-cooled inverter module 400 to the load motor through the output busbar assembly 600 and connecting cable.

[0069] This application also provides a frequency converter, which includes the inverter cabinet described above.

[0070] The frequency converter in this embodiment adopts the aforementioned integrated and modular inverter cabinet structure, which not only inherits the advantages of inverter cabinets in harmonic suppression, current sharing control, heat dissipation performance, and maintenance convenience, but also further improves its overall integration and operational reliability. The collaborative working mechanism of its internal components ensures a highly efficient conversion process from DC power input to AC power output, meeting the power quality and control accuracy requirements of different load motors, and is suitable for various application scenarios such as industrial drives and new energy power generation.

[0071] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An inverter cabinet, characterized in that, Includes the server rack and the components housed within it: At least one liquid-cooled inverter module, wherein a busbar assembly is provided on the first side of the liquid-cooled inverter module, and an output busbar assembly is provided on the second side of the liquid-cooled inverter module; a heat exchanger and a fan are provided inside the liquid-cooled inverter module; A water pipe assembly, wherein the water pipe assembly is connected to the heat exchanger via a quick water pipe connector; A control component is installed on the cabinet and connected to the liquid-cooled inverter module via wiring.

2. The inverter cabinet as described in claim 1, characterized in that, The cabinet includes a frame and a support frame, the support frame is connected to the frame, and the liquid-cooled inverter module is installed on the support frame; the bottom of the liquid-cooled inverter module is an air inlet, and the support frame has a hollow area to avoid the air inlet.

3. The inverter cabinet as described in claim 2, characterized in that, The output bus assembly includes a three-phase output bus and a busbar. One end of the three-phase output bus is connected to the output end of the liquid-cooled inverter module, and the other end of the three-phase output bus passes through the support frame and is connected to the busbar.

4. The inverter cabinet as described in claim 2, characterized in that, The cabinet also includes a swing door structure assembly, one side of which is hinged to the frame; the swing door structure assembly is provided with the control assembly, which is used to control the liquid-cooled inverter module.

5. The inverter cabinet as described in claim 4, characterized in that, The swing door structure assembly includes a hinge structure and a movable door. One side of the hinge structure is connected to the frame, and the other side of the hinge structure is connected to the movable door. The movable door is located on the third side of the liquid-cooled inverter module, and the control component is installed on the movable door.

6. The inverter cabinet as described in claim 1, characterized in that, The water pipeline assembly includes a main inlet pipe, an inlet branch pipe, a main return pipe, and a return branch pipe; one end of the inlet branch pipe is connected to the main inlet pipe, and the other end of the inlet branch pipe is connected to the inlet of the heat exchanger; one end of the return branch pipe is connected to the main return pipe, and the other end of the return branch pipe is connected to the outlet of the heat exchanger.

7. The inverter cabinet as described in claim 6, characterized in that, The water inlet branch includes a first branch water inlet pipe and a second branch water inlet pipe, which are connected by a first quick water pipe connector; The return water branch includes a first branch return water pipe and a second branch return water pipe, which are connected by a second quick water pipe connector.

8. The inverter cabinet as described in claim 7, characterized in that, The first quick water pipe connector includes a male connector and a female connector that are detachably connected to each other. Both the male connector and the female connector are equipped with valves. When the male connector and the female connector are separated, the valves are closed. When the male connector and the female connector are connected, the valves are open.

9. The inverter cabinet as described in claim 1, characterized in that, The inverter cabinet also includes: A fuse, the input terminal of which is connected to the busbar assembly; A common-mode filter magnetic ring, the input end of which is connected to the output end of the fuse.

10. A frequency converter, characterized in that, Including the inverter cabinet as described in any one of claims 1-9.

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