frequency converter

Abstract

This application discloses a frequency converter, which includes a control module, a power module, a chassis, and a sealing assembly. The chassis includes a bottom shell, a middle shell, and a top shell, with the middle shell disposed between the bottom shell and the top shell. The bottom shell, middle shell, and top shell cooperate to form an accommodating space. The power module and the control module are disposed within the accommodating space. The bottom shell and the middle shell are sealed together by the sealing assembly, and the middle shell and the top shell are also sealed together by the sealing assembly. Thus, this application achieves sealed connections between the bottom shell and the middle shell, and between the middle shell and the top shell, through sealing assemblies. This helps reduce dust from entering the accommodating space, thereby protecting the control module and the power module. Furthermore, it enhances the overall dustproof and waterproof capabilities of the frequency converter, significantly improving its adaptability and reliability in complex industrial environments such as dusty and humid conditions.

Description

Technical Field

[0001] This application relates to the field of frequency conversion technology, and in particular to a frequency converter. Background Technology

[0002] A frequency converter is a power electronic device used to control the speed and torque of an AC motor. It achieves precise motor control by changing the frequency and voltage of the power supply. However, some frequency converters in this technology have poor sealing, allowing external contaminants such as dust and moisture to easily enter their interior. Utility Model Content

[0003] This application provides a frequency converter that can improve the sealing performance of the frequency converter.

[0004] This application provides a frequency converter, including a control module, a power module, a chassis, and a sealing assembly. The chassis includes a bottom shell, a middle shell, and a top shell. The middle shell is disposed between the bottom shell and the top shell. The bottom shell, middle shell, and top shell cooperate to form an accommodating space. The power module and the control module are disposed within the accommodating space. The bottom shell and the middle shell are sealed together by the sealing assembly, and the middle shell and the top shell are sealed together by the sealing assembly.

[0005] In some embodiments, the sealing assembly includes a first seal disposed at the open edge of the middle shell and abutting between the middle shell and the front shell;

[0006] The middle shell and / or the front shell form a first groove, and the first seal is embedded in the first groove.

[0007] In some embodiments, the sealing assembly includes a second seal disposed at the open edge of the bottom shell and abutting between the middle shell and the bottom shell;

[0008] The middle shell and / or bottom shell form a second groove, and the second seal is embedded in the second groove.

[0009] In some embodiments, the accommodating space includes a first cavity and a second cavity that are independent of each other; the middle shell and the front shell cooperate to form the first cavity, and the middle shell and the bottom shell cooperate to form the second cavity; the control module is disposed in the first cavity, and the power module includes a power board and a power component disposed on the power board, the power board is disposed in the middle shell, and the power component is disposed in the second cavity.

[0010] In some embodiments, the chassis further includes a partition disposed in the second cavity and dividing the second cavity into a first sub-cavity, a second sub-cavity, and a third sub-cavity that are independent of each other. The power components include a reactor and a capacitor disposed on the power board, with the reactor disposed in the first sub-cavity and the capacitor disposed in the second sub-cavity.

[0011] The frequency converter also includes a heat sink module, which is located in the third sub-cavity.

[0012] In some implementations, the inverter also includes a fan module connected to the end of the chassis and located outside the housing space, the fan module being configured to drive airflow toward the radiator module.

[0013] In some embodiments, the middle shell is provided with a through hole communicating with the first cavity, and the fan module is electrically connected to the power board located in the first cavity through a terminal, with the terminal passing through the through hole;

[0014] The sealing assembly also includes a third seal, which is disposed around the edge of the through hole and abuts against the fan module and the middle housing.

[0015] In some implementations, the inverter also includes a junction box module, which is connected to the end of the chassis and located outside the housing space.

[0016] In some implementations, the junction box module is connected to the first cavity;

[0017] The sealing assembly also includes a fourth seal, which is disposed around the connection between the junction box module and the middle housing and abuts against the middle housing and the junction box module.

[0018] In some embodiments, the faceplate has an opening communicating with the first cavity, and a portion of the control module is exposed through the opening;

[0019] The sealing assembly also includes a fifth seal, which abuts between the control module and the faceplate;

[0020] The control module and / or the faceplate are provided with a third groove, and the fifth seal is embedded in the third groove.

[0021] The frequency converter provided in this application includes a control module, a power module, a chassis, and a sealing assembly. The chassis includes a bottom shell, a middle shell, and a top shell. The middle shell is disposed between the bottom shell and the top shell. The bottom shell, middle shell, and top shell cooperate to form an accommodating space. The power module and the control module are disposed within the accommodating space. The bottom shell and the middle shell are sealed together by the sealing assembly, and the middle shell and the top shell are also sealed together by the sealing assembly. Thus, this application achieves sealed connections between the bottom shell and the middle shell, and between the middle shell and the top shell, through sealing assemblies. This helps reduce dust from entering the accommodating space, thereby protecting the control module and the power module. Furthermore, it enhances the overall dustproof and waterproof capabilities of the frequency converter, significantly improving its adaptability and reliability in complex industrial environments such as dusty and humid conditions. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, 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 the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the exploded structure of the frequency converter in the embodiments of this application.

[0024] Figure 2 This is a schematic diagram of the exploded structure of the frequency converter in another embodiment of this application.

[0025] Figure 3 This is a schematic diagram of the exploded structure of the frequency converter in another embodiment of this application.

[0026] Explanation of icon numbers:

[0027] 10. Frequency converter; 100. Control module; 200. Power module; 210. Power component; 211. Reactor; 212. Capacitor; 220. Power board; 300. Chassis; 300a. Accommodation space; 301. First cavity; 302. Second cavity; 303. First sub-cavity; 303a. Second sub-cavity; 304. Third sub-cavity; 305. First groove; 307. Through hole; 308. Opening; 309. Third groove; 310. Bottom shell; 320. Middle shell; 330. Front shell; 340. Partition; 400. Sealing assembly; 410. First seal; 430. Third seal; 440. Fourth seal; 450. Fifth seal; 500. Radiator module; 600. Fan module; 700. Junction box module.

[0028] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0030] Where the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0031] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] A frequency converter is a power electronic device used to control the speed and torque of an AC motor. It achieves precise motor control by changing the frequency and voltage of the power supply. However, some frequency converters in this technology have poor sealing, allowing external contaminants such as dust and moisture to easily enter their interior.

[0034] In view of this, please refer to Figures 1 to 3 This application provides a frequency converter 10, which includes a control module 100, a power module 200, a chassis 300, and a sealing assembly 400. The chassis 300 includes a bottom shell 310, a middle shell 320, and a front shell 330. The middle shell 320 is disposed between the bottom shell 310 and the front shell 330. The bottom shell 310, the middle shell 320, and the front shell 330 cooperate to form an accommodating space 300a. The power module 200 and the control module 100 are disposed within the accommodating space 300a. The bottom shell 310 and the middle shell 320 are sealed together by the sealing assembly 400, and the middle shell 320 and the front shell 330 are sealed together by the sealing assembly 400.

[0035] Thus, this application achieves sealed connections between the bottom shell 310 and the middle shell 320, and between the middle shell 320 and the front shell 330, through sealing components 400. This helps reduce dust from entering the accommodating space 300a, thereby helping to protect the control module 100 and the power module 200. This, in turn, helps to enhance the overall dustproof and waterproof capabilities of the inverter 10, significantly improving its adaptability and reliability in complex industrial environments such as dusty and humid conditions.

[0036] Please see Figure 2In some embodiments, the sealing assembly 400 includes a first seal 410 disposed at the open edge of the middle shell 320 and abutting between the middle shell 320 and the front shell 330, the first seal 410 being used to form an effective sealing barrier at the junction of the middle shell 320 and the front shell 330.

[0037] The first seal 410 can be made of a material with excellent elasticity and weather resistance, such as rubber, EVA (ethylene-vinyl acetate copolymer), EPDM (ethylene propylene diene monomer rubber) or foam, which can meet the usage requirements under different temperature and humidity conditions.

[0038] Please see Figure 2 and Figure 3 The middle shell 320 and / or the front shell 330 form a first groove 305, and the first seal 410 is embedded in the first groove 305, thereby achieving a stable and reliable sealing fit. The shape of the first groove 305 can be adapted to the shape of the first seal 410. By providing the first groove 305 at the contact point between the middle shell 320 and the front shell 330, and embedding the first seal 410 therein, displacement or detachment of the first seal 410 during assembly can be effectively prevented, improving the installation accuracy and overall structural stability of the sealing assembly 400. Simultaneously, the first groove 305 also helps to enhance the fit between the first seal 410 and the connection points of the middle shell 320 and the front shell 330, maintaining good sealing performance even under external pressure or vibration, thereby significantly improving the inverter 10's resistance to external contaminants (such as dust, moisture, etc.).

[0039] In some embodiments, the sealing assembly 400 includes a second seal (not shown) disposed at the open edge of the bottom shell 310 and abutting between the middle shell 320 and the bottom shell 310, for forming an effective sealing interface after the two are assembled.

[0040] The second seal is made of materials with good elasticity and weather resistance, such as rubber, EVA (ethylene-vinyl acetate copolymer), EPDM (ethylene propylene diene monomer rubber), or foam, which can adapt to the usage requirements under different environmental conditions.

[0041] The middle shell 320 and / or the bottom shell 310 form a second groove (not shown in the figure), and the second seal is embedded in the second groove, thereby effectively improving the positioning accuracy of the seal during the assembly process, preventing it from shifting or falling off, and ensuring the integrity and reliability of the sealing structure. At the same time, the design of the second groove helps to improve the fit between the second seal and the connection between the middle shell 320 and the bottom shell 310, so that the inverter 10 can still maintain a good sealing effect when it is subjected to external pressure, vibration or temperature difference changes, thereby significantly enhancing the inverter 10's resistance to external contaminants (such as dust, water vapor, etc.).

[0042] In some embodiments, the accommodating space 300a includes a first cavity 301 and a second cavity 302 that are independent of each other; the middle shell 320 and the front shell 330 cooperate to form the first cavity 301, and the middle shell 320 and the bottom shell 310 cooperate to form the second cavity 302; the control module 100 is disposed in the first cavity 301, and the power module 200 includes a power board 220 and a power component 210 disposed in the power board 220. The power board 220 is disposed in the middle shell 320, and the power component 210 is disposed in the second cavity 302. A portion of the power board 220 may be disposed in the first cavity 301, and another portion may be disposed in the second cavity 302. The power board 220 disposed in the second cavity 302 can be electrically connected to the power board 220 disposed in the first cavity 301 via wires, connectors, etc., wherein the wires and connectors can pass through the middle shell 320.

[0043] By placing the control module 100 and the power component 210 in the first cavity 301 formed by the middle shell 320 and the front shell 330 and the second cavity 302 formed by the middle shell 320 and the bottom shell 310 respectively, effective isolation of different functional modules is achieved, thereby helping to reduce the impact of heat and electromagnetic interference generated by the power component 210 during operation on the sensitive electronic components in the control module 100.

[0044] The control module 100 typically contains sophisticated electronic components such as a microprocessor, signal processing unit, and communication interface, and is highly sensitive to its operating environment. By placing it within a separate first cavity 301, external environmental factors (such as dust and moisture) as well as heat and electromagnetic interference generated by the power module 200 can be effectively avoided, thereby improving the stability and reliability of the control system.

[0045] The power module 200 primarily performs electrical energy conversion functions, such as rectification and inversion. During operation, it generates a large amount of heat and may be accompanied by strong electromagnetic radiation. Placing the power components of the power module 200 in a separate second cavity 302 not only facilitates centralized heat dissipation design but also prevents it from interfering with the control module 100, achieving physical isolation between functional modules and improving the overall operational safety of the frequency converter 10.

[0046] The inverter 10's chassis 300 consists of three parts: a bottom shell 310, a middle shell 320, and a front shell 330. This three-section design allows each functional module to be housed in a separate cavity, facilitating modular layout. Furthermore, the three-section structure aids in component positioning and disassembly / maintenance during assembly, improving production efficiency and ease of subsequent maintenance.

[0047] The middle shell 320 is positioned between the bottom shell 310 and the top shell 330, serving as a key structural component connecting the two. The middle shell 320 not only provides support and separation but also offers a structural foundation for the installation of the sealing assembly 400. Through a well-designed external shape and internal structure, a good spatial isolation effect can be achieved between different cavities, while simultaneously providing an installation location for the sealing structure.

[0048] The middle shell 320 and the front shell 330 cooperate to form a closed or semi-closed space, namely the first cavity 301. The first cavity 301 is mainly used to accommodate the control module 100, thereby keeping the control module 100 in a relatively clean and stable environment, reducing external interference, and improving control accuracy and system stability.

[0049] The middle shell 320 and the bottom shell 310 work together to form another closed or semi-closed space, namely the second cavity 302. The second cavity 302 is mainly used to accommodate the power components 210 of the power module 200. Since the power module 200 generates a lot of heat, the design of the second cavity 302 can also be combined with heat dissipation structures (such as fans, heat sinks, etc.) to achieve effective thermal management and improve the overall thermal stability of the inverter 10.

[0050] The sealing assembly 400 is typically made of materials with good elasticity and weather resistance, such as rubber, EVA, and EPDM, and is installed in the groove at the connection point of the chassis 300. The sealing assembly 400 effectively prevents external dust, moisture, and other contaminants from entering the equipment, thereby improving the protection level of the frequency converter 10.

[0051] Please see Figure 2 In some embodiments, the chassis 300 further includes a partition 340, which is used to functionally partition the second cavity 302, improving space utilization efficiency and thermal management performance. The partition 340 is fixedly installed inside the second cavity 302 and divides the second cavity 302 into three independent sub-cavities: a first sub-cavity 303, a second sub-cavity 303a, and a third sub-cavity 304. This multi-cavity structure design enables refined layout and isolation management of different functional components inside the inverter 10.

[0052] The power component 210 includes a reactor 211 and a capacitor 212. The reactor 211 is located in the first sub-cavity 303, and the capacitor 212 is located in the second sub-cavity 303a. The reactor 211, as a key component in the power circuit, suppresses current fluctuations and stabilizes voltage; it generates heat during operation. The capacitor 212 is used for filtering and energy storage and is sensitive to the temperature stability of its operating environment. By placing the reactor 211 and capacitor 212 in different cavities, differentiated control of their respective operating environments can be achieved, reducing thermal and electromagnetic interference between them and improving the stability and safety of the inverter 10.

[0053] The inverter 10 also includes a heat sink module 500, which is disposed within the third sub-cavity 304 and is used for efficient heat dissipation of the power components 210, especially high-heat-generating elements. The heat sink module 500 is typically made of a thermally conductive metal material, such as aluminum alloy or copper alloy, and has multiple heat dissipation fins on its surface to increase the heat dissipation efficiency by increasing the contact area with air. A heat conduction path can be established between the heat sink module 500 and the power board 220 through thermal pads, thermal adhesive, or direct bonding, allowing the heat generated by the power components 210 to be quickly conducted to the heat sink module 500, and the fan module 600 drives airflow to accelerate heat dissipation.

[0054] In addition, a sealing structure or heat insulation material is provided between the partition 340 and the chassis 300 to prevent airflow mixing and cross-propagation of contaminants between the sub-cavities, while enhancing the overall protection level and long-term reliability of the inverter 10. The partition 340 can also serve as a support structure for fixing components such as the reactor 211 and capacitor 212, improving the overall structural stability and assembly efficiency.

[0055] Please see Figure 2 In some embodiments, the inverter 10 further includes a fan module 600, which is connected to the end of the chassis 300 and located outside the receiving space 300a. The fan module 600 is configured to drive airflow to the radiator module 500. The fan module 600 is detachably mounted to the side or top end area of ​​the chassis 300 via clips, screws, or flange structures, facilitating on-site installation and subsequent maintenance. Because the fan module 600 is located outside the chassis 300, it not only helps to prevent its own heat from affecting the internal environment of the chassis 300, but also effectively reduces the overall internal space occupancy rate and improves the rationality of the structural layout. At the same time, this arrangement also facilitates the direct entry of cool air into the chassis 300, improving airflow utilization and overall heat dissipation efficiency.

[0056] A sealing component 400 is provided at the contact point between the fan module 600 and the housing to prevent external dust or moisture from entering the equipment, and also helps to improve the overall protection level of the machine.

[0057] When the fan module 600 is operating, it draws cool external air into the chassis 300 and guides the airflow across the surface of the heatsink module 500, thereby accelerating heat dissipation. The heatsink module 500 is typically made of metal and has a large surface area, enabling it to efficiently conduct the heat generated by the power module 200 into the air. Through the forced air cooling effect of the fan module 600, the operating temperature of the power module 200 can be significantly reduced, preventing performance degradation or component damage due to overheating.

[0058] The fan module 600 can be intelligently controlled to start and stop based on the real-time temperature of the power module 200. For example, data is collected by a temperature sensor and fed back to the control system to achieve on-demand operation, thereby reducing energy consumption while ensuring heat dissipation. In addition, the top layout of the fan module 600 also facilitates the rapid exhaust of hot air, further improving the overall ventilation efficiency and heat dissipation performance of the unit.

[0059] Please continue reading. Figure 2 In some embodiments, the middle shell 320 is provided with a through hole 307 communicating with the first cavity 301. The fan module 600 is electrically connected to the power board 220 located in the first cavity 301 through terminals, with the terminals passing through the through hole 307. The fan module 600 is electrically connected to the power board 220 located in the first cavity 301 through terminals, and the terminals pass through the through hole 307 for wiring, thereby realizing the control and monitoring of the operating status of the fan module 600.

[0060] The sealing assembly 400 also includes a third seal 430, which is disposed around the edge of the through hole 307 and abuts against the fan module 600 and the middle shell 320, thereby helping to seal the gap around the through hole 307, preventing dust, moisture and other substances from entering the first cavity 301, and maintaining good sealing performance when the terminal is inserted, thus taking into account both functionality and protection.

[0061] The third seal 430 is made of a material with elasticity and good weather resistance, such as rubber, EVA (ethylene-vinyl acetate copolymer), EPDM (ethylene propylene diene monomer rubber), or foam. This seal can be pre-embedded in the annular groove on the middle shell 320, and after the terminal is inserted, it can still tightly wrap around the outer wall of the terminal, forming a reliable sealing interface. In addition, the third seal 430 also has a certain buffering effect, maintaining a stable sealing effect when the equipment is subjected to vibration or temperature changes, improving the environmental adaptability of the overall structure.

[0062] Please see Figure 2In some embodiments, the inverter 10 further includes a junction box module 700, which is connected to the end of the chassis 300 and located outside the housing space 300a. The junction box module 700 is used for centralized access and connection management of external power lines, control signal lines, and other electrical circuits. The junction box module 700 is mounted on the side or bottom end area of ​​the chassis 300 and is electrically connected to the power module 200 or control module 100 inside the chassis 300 via terminals. This external arrangement of the module not only facilitates on-site wiring operations but also helps reduce the space occupied inside the chassis 300, improving the overall layout rationality. Simultaneously, since the junction box module 700 is located outside the chassis 300, it effectively avoids the risk of short circuits caused by dripping water or condensation accumulation, improving the safety and reliability of the inverter 10 operation.

[0063] The junction box module 700 has multiple inlet and outlet holes on its housing and can be configured with waterproof connectors to meet different protection levels according to different application requirements. A sealing component 400, such as a rubber gasket or elastic sealing strip, is also provided between the housing and the middle shell 320 or the bottom shell 310 to ensure good isolation between the wiring area and other cavities inside the equipment, preventing external contaminants from entering the inside of the frequency converter 10 through the wiring ports.

[0064] In some embodiments, the junction box module 700 is connected to the first cavity 301. Specifically, the junction box module 700 not only serves as an interface for external power lines and control signal lines, but also communicates with the first cavity 301 located above the middle shell 320 through a specific channel, facilitating electrical connection and signal transmission between the internal control module 100 and external lines.

[0065] The sealing assembly 400 also includes a fourth seal 440, which is disposed around the connection between the junction box module 700 and the middle housing 320 and abuts against the middle housing 320 and the junction box module 700. The fourth seal 440 surrounds the connection edge between the two and abuts against the middle housing 320 and the junction box module 700 in the assembled state, forming a stable sealing interface.

[0066] The fourth seal 440 is made of a material with good elasticity and weather resistance, such as rubber, EVA (ethylene-vinyl acetate copolymer), EPDM (ethylene propylene diene monomer rubber), or foam, which can adapt to the usage requirements under different ambient temperature and humidity conditions. This seal can be embedded in a pre-set annular groove on the middle shell 320 or junction box module 700. During assembly, it achieves a tight fit through compression deformation, thereby effectively sealing the joint gaps and improving the dustproof and waterproof rating of the inverter 10.

[0067] Furthermore, by connecting the junction box module 700 to the first cavity 301 and setting a fourth seal 440 at the connection point, not only is effective protection of critical electrical connection paths achieved, but the modular design requirements of the whole machine structure are also taken into account, improving assembly efficiency and the convenience of later maintenance.

[0068] Please see Figure 2 and Figure 3 In some embodiments, the faceplate 330 has an opening 308 communicating with the first cavity 301, through which a portion of the control module 100 is exposed. The control module 100 exposes some of its functional components (such as an operation panel, display screen, or keyboard) through this opening 308, allowing the user to operate and view its status. The opening 308 is located on the front surface of the faceplate 330, and its shape and size are adapted to the specific structure of the control module 100 to ensure a clear display of the interface and easy touch operation.

[0069] To achieve the exposed control module 100 while maintaining good sealing performance of the first cavity 301 and preventing external contaminants from entering the device through the opening 308, this embodiment of the application also provides a fifth seal 450 between the control module 100 and the housing 330. This fifth seal 450 is installed at the contact point between the two and forms a tight fit in the assembled state, thereby constructing an effective sealing barrier.

[0070] Specifically, the fifth seal 450 can be made of rubber, EVA (ethylene-vinyl acetate copolymer), EPDM (ethylene propylene diene monomer rubber), or other elastic and weather-resistant materials, possessing good compression resilience and environmental adaptability. The fifth seal 450 can be pre-embedded in the groove on the edge of the control module 100, or directly adhered to the inside of the opening 308 of the faceplate 330. After the control module 100 is installed in place, a reliable seal is achieved through the pressing action between the faceplate 330 and the control module 100.

[0071] Furthermore, the design of the fifth seal 450 also takes into account both ease of assembly and long-term stability. During equipment operation, even when affected by external factors such as vibration and temperature changes, this sealing structure can still maintain a good sealing effect, effectively preventing dust, moisture and other contaminants from entering the first chamber 301, and protecting the safe operation of the internal electronic components of the control module 100.

[0072] To further enhance the stability and reliability of the sealing connection between the control module 100 and the housing 330, this invention provides a third groove 309 on the control module 100 and / or the housing 330, and embeds the fifth sealing element 450 within this third groove 309. This structural design not only improves the positioning accuracy of the sealing element during assembly but also enhances the fit between the sealing assembly 400 and the housing, maintaining good sealing performance even under external pressure or vibration.

[0073] Specifically, the third groove 309 can be located on the outer edge of the control module 100, or on the edge region of the opening 308 on the faceplate 330 corresponding to the control module 100. The shape of this groove matches the fifth seal 450, typically being an annular or U-shaped structure, with its depth and width rationally designed according to the compression characteristics of the sealing material. The fifth seal 450 is made of a material with good elasticity and weather resistance, such as rubber, EVA (ethylene-vinyl acetate copolymer), EPDM (ethylene propylene diene monomer rubber), or foam, and is pre-embedded in the third groove 309. After the control module 100 is installed in place, a tight fit is achieved through the pressing action between the faceplate 330 and the control module 100, forming a stable sealing interface.

[0074] Please see Figure 2 In some implementations, the fan module 600 adopts a modular design, facilitating assembly, replacement, and maintenance. The fan module 600 is used to introduce external cool air into the chassis 300 and guide the airflow over the surfaces of the power module 200 and the heat sink module 500 to accelerate heat dissipation and improve the heat dissipation efficiency of the equipment.

[0075] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0076] The above are merely preferred embodiments of this application and are 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. A frequency converter, characterized in that The device includes a control module, a power module, a chassis, and a sealing assembly. The chassis includes a bottom shell, a middle shell, and a top shell. The middle shell is disposed between the bottom shell and the top shell. The bottom shell, the middle shell, and the top shell cooperate to form an accommodating space. The power module and the control module are disposed within the accommodating space. The bottom shell and the middle shell are sealed together by the sealing assembly, and the middle shell and the top shell are sealed together by the sealing assembly. The accommodating space includes a first cavity and a second cavity that are independent of each other; the middle shell and the front shell cooperate to form the first cavity, and the middle shell and the bottom shell cooperate to form the second cavity; the control module is disposed in the first cavity, and the power module includes a power board and a power component disposed on the power board, the power board is disposed in the middle shell, and the power component is disposed in the second cavity.

2. The frequency converter of claim 1, wherein, The sealing assembly includes a first seal, which is disposed at the open edge of the middle shell and abuts against the middle shell and the front shell; The middle shell and / or the front shell form a first groove, and the first seal is embedded in the first groove.

3. The frequency converter of claim 1, wherein, The sealing assembly includes a second seal, which is disposed at the open edge of the bottom shell and abuts against the middle shell and the bottom shell; The middle shell and / or the bottom shell form a second groove, and the second seal is embedded in the second groove.

4. The frequency converter of claim 1, wherein, The chassis also includes a partition, which is disposed in the second cavity and divides the second cavity into three independent sub-cavities: a first sub-cavity, a second sub-cavity, and a third sub-cavity. The power components include a reactor and a capacitor disposed on the power board. The reactor is disposed in the first sub-cavity, and the capacitor is disposed in the second sub-cavity. The frequency converter also includes a heat sink module, which is disposed in the third sub-cavity.

5. The frequency converter of claim 4, wherein, The inverter also includes a fan module connected to the end of the chassis and located outside the housing space, the fan module being configured to drive airflow toward the radiator module.

6. The frequency converter of claim 5, wherein, The middle shell is provided with a through hole communicating with the first cavity. The fan module is electrically connected to the power board located in the first cavity through a terminal, and the terminal passes through the through hole. The sealing assembly further includes a third seal, which is disposed around the edge of the through hole and abuts against the fan module and the middle housing.

7. The frequency converter of claim 1, wherein, The inverter also includes a junction box module, which is connected to the end of the chassis and located outside the housing space.

8. The frequency converter of claim 7, wherein, The junction box module is connected to the first cavity; The sealing assembly further includes a fourth seal, which is disposed around the connection between the junction box module and the middle shell and abuts against the middle shell and the junction box module.

9. The frequency converter of claim 1, wherein, The faceplate has an opening that communicates with the first cavity, and a portion of the control module is exposed through the opening; The sealing assembly further includes a fifth seal, which abuts between the control module and the faceplate; The control module and / or the faceplate are provided with a third groove, and the fifth sealing element is embedded in the third groove.

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