Electric control box and heating equipment

Abstract

The application discloses an electric control box and a heating and ventilation equipment. The electric control box comprises a box cover, a heat dissipation cold plate in a plate structure and a variable frequency drive module. The heat dissipation cold plate and the box cover cooperatively form an installation cavity. The heat dissipation cold plate is internally provided with a heat dissipation flow channel for the flow of a heat exchange medium, and the heat dissipation flow channel flows through the plate body part of the heat dissipation cold plate cooperatively forming the installation cavity. The variable frequency drive module is connected with the heat dissipation cold plate and located in the installation cavity. In this way, the heat dissipation flow channel is internally arranged in the heat dissipation cold plate, and the heat exchange medium can circulate and flow in the flow channel, thereby effectively cooling the variable frequency drive module. In addition, the heat dissipation flow channel is arranged in the plate body part of the heat dissipation cold plate and the box cover cooperatively forming the installation cavity, so that the distance between the heat dissipation flow channel and the installation cavity is relatively short, and the heat generated by the variable frequency drive module can be quickly conducted to the heat dissipation cold plate and quickly taken away through the heat exchange medium, thereby more helping to improve the heat dissipation efficiency of the variable frequency drive module.

Description

Technical Field

[0001] This application relates to the field of heating, ventilation and air conditioning (HVAC) equipment technology, and in particular to an electrical control box and HVAC equipment. Background Technology

[0002] Heating, ventilation, and air conditioning (HVAC) systems are an important component of building environmental control, encompassing multiple systems such as heating, ventilation, and air conditioning. They are widely used in residential, commercial, and industrial buildings. Their main function is to create a comfortable and healthy living and working environment by regulating parameters such as indoor temperature, humidity, and airflow.

[0003] As a key control component of HVAC equipment, the electrical control box typically integrates circuit modules such as the main control module and the variable frequency drive module to control the operation of components (such as compressors and fans) within the HVAC system. However, in related technologies, the variable frequency drive module generates a significant amount of heat, and the heat dissipation methods of the HVAC system through air ducts cannot meet the heat dissipation requirements of the variable frequency drive module, resulting in the inability to transfer the heat from the variable frequency drive module in a timely manner. Utility Model Content

[0004] This application provides an electrical control box and HVAC equipment that enables the frequency converter drive module to dissipate heat quickly.

[0005] In a first aspect, embodiments of this application provide an electrical control box, which includes a cover, a heat dissipation cold plate with a plate-like structure, and a frequency conversion drive module. The heat dissipation cold plate and the cover cooperate to form an installation cavity. The heat dissipation cold plate is provided with a heat dissipation channel for the flow of heat exchange medium, and the heat dissipation channel flows through the plate part of the heat dissipation cold plate that cooperates to form the installation cavity. The frequency conversion drive module is connected to the heat dissipation cold plate and is located in the installation cavity.

[0006] In some embodiments, the mounting cavity includes a first cavity and a second cavity that are connected to each other;

[0007] The box cover includes a first cover and a second cover respectively disposed on opposite sides of the heat dissipation plate. The first cover and the heat dissipation plate cooperate to form a first cavity, and the second cover and the heat dissipation plate cooperate to form a second cavity.

[0008] The variable frequency drive module includes a filter module and a drive module. The drive module is installed in the first cavity, and the filter module is installed in the second cavity.

[0009] In some embodiments, the drive module includes a drive board and one or more of the following disposed on the drive board: a fan drive module, a compressor drive module, a fan drive chip, a compressor drive chip, a module power supply, a film capacitor, or an electrolytic capacitor. The fan drive module and the compressor module are located on the side of the drive board facing the heat dissipation plate, while the fan drive chip, the compressor drive chip, the module power supply, the film capacitor, and the electrolytic capacitor are all located on the side of the drive board away from the heat dissipation plate.

[0010] In some implementations, both the fan drive module and the compressor drive module are in contact with the heat sink.

[0011] In some embodiments, the heat dissipation plate is provided with heat dissipation channels surrounding the edges of the fan drive module and the compressor drive module.

[0012] In some implementations, the frequency converter drive module includes a filter board and one or more of a varistor, a differential-mode capacitor, or a common-mode capacitor disposed on the filter board, wherein the varistor, differential-mode capacitor, and common-mode capacitor are all located on the side of the filter board facing the heat dissipation plate.

[0013] In some embodiments, the control box also includes a main control module, and the first cover has a third cavity in which the main control module is installed.

[0014] In some embodiments, the first cover of the third cavity, which forms the third cavity, protrudes outward from the heat dissipation plate along the arrangement direction of the first cavity and the second cavity.

[0015] In some embodiments, the open edge of the third cavity is formed with a wire-passing groove, and the groove wall of the wire-passing groove is configured with a wire-passing hole connecting the first cavity and the third cavity; the electrical control box also includes an electrical connection wire, one end of which is connected to the drive module, and the other end of which extends into the third cavity through the wire-passing hole and is connected to the main control module.

[0016] In some embodiments, the first cover also has a sealing groove surrounding the open edge of the first cavity, and a heat dissipation plate closes the opening of the sealing groove.

[0017] In some embodiments, the mounting cavity includes a first cavity;

[0018] The box cover includes a first cover body, which cooperates with a heat dissipation plate to form a first cavity, which is located on one side of the heat dissipation plate;

[0019] The variable frequency drive module includes a filter module and a drive module, both of which are installed in the first cavity.

[0020] In some embodiments, the control box also includes a flow channel connector extending along the length of the heat sink plate, the flow channel connector being connected to the heat sink flow channel.

[0021] In some embodiments, the frequency converter drive module is provided with a terminal block, and the side of the cover away from the heat dissipation plate has a first opening that connects the mounting cavity to the outside, with the terminal block exposed in the first opening;

[0022] The electrical control box also includes a first cover plate, which is detachably connected to the box cover to cover or expose the first opening.

[0023] In some embodiments, the lid is provided with a connecting rib that surrounds the edge of the first opening, and the first cover plate is detachably connected to the connecting rib. When the first cover plate is connected to the connecting rib, the connecting rib, the lid, and the first cover plate cooperate to form a second opening, through which the first opening communicates with the outside.

[0024] In some implementations, the second opening is located at the bottom of the lid.

[0025] In some embodiments, the electrical control box also includes a seal connected between the connecting rib and the first cover plate to seal the connection between the connecting rib and the first cover plate.

[0026] Secondly, this application provides a heating, ventilation, and air conditioning (HVAC) device, which includes a housing and an electrical control box according to any of the above embodiments, with the electrical control box disposed inside the housing.

[0027] In some implementations, the housing is provided with an access port; the electrical control box is located at the access port.

[0028] The electrical control box and HVAC equipment provided in this application include a cover, a plate-shaped heat dissipation cold plate, and a frequency converter drive module. The heat dissipation cold plate and the cover cooperate to form a mounting cavity. The heat dissipation cold plate has a heat dissipation channel for the flow of heat exchange medium, and the heat dissipation channel flows through the plate portion of the mounting cavity formed by the heat dissipation cold plate. The frequency converter drive module is connected to the heat dissipation cold plate and located within the mounting cavity. Thus, the heat dissipation cold plate has a heat dissipation channel inside, allowing the heat exchange medium to circulate within the channel, thereby effectively cooling the frequency converter drive module. Furthermore, the heat dissipation channel is located on the plate portion of the mounting cavity formed by the heat dissipation cold plate and the cover, making the distance between the heat dissipation channel and the mounting cavity relatively short. This allows the heat generated by the frequency converter drive module to be quickly conducted to the heat dissipation cold plate and quickly carried away by the heat exchange medium, further improving the heat dissipation efficiency of the frequency converter drive module. Attached Figure Description

[0029] 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.

[0030] Figure 1 This is a schematic diagram of the exposed access panel of a heating, ventilation, and air conditioning (HVAC) device according to an embodiment of this application.

[0031] Figure 2 This is a schematic diagram of the structure of an electrical control box according to an embodiment of this application;

[0032] Figure 3 for Figure 2 A schematic diagram of the exploded structure of the central control box;

[0033] Figure 4 for Figure 2 A schematic diagram of part of the structure of the central electrical control box;

[0034] Figure 5 for Figure 4 An exploded structural diagram of some parts of the central control box;

[0035] Figure 6 for Figure 5 A schematic diagram of the structure of the first cover body;

[0036] Figure 7 for Figure 6 A structural schematic diagram of the first cover body from another perspective;

[0037] Figure 8 This is a schematic diagram of the structure of the electrical control box according to another embodiment of this application;

[0038] Explanation of icon numbers:

[0039] 10. Outdoor unit; 20. Housing; 20a. Inspection port; 30. Electrical control box; 100. Variable frequency drive module; 101. Terminal block; 110. Drive board; 200. Heat dissipation plate; 201. Heat dissipation channel; 210. First plate; 220. Second plate; 300. Cover; 301. Mounting cavity; 302. First opening; 303. Second opening; 304. First cavity; 306. Third cavity; 307. Wiring groove; 308. Wiring hole; 309. Sealing groove; 310. Connecting rib; 320. First cover; 330. Second cover; 400. First cover plate; 500. Second cover plate; 600. Main control module; 710. Channel connector;

[0040] 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

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] Heating, ventilation, and air conditioning (HVAC) systems are used to regulate the indoor environment, including functions such as heating, ventilation, and air conditioning. Their main purpose is to provide users with a comfortable and healthy indoor environment by controlling parameters such as temperature, humidity, and airflow. Common HVAC equipment includes air conditioners, radiators, and ventilation systems. These devices are widely used in residential, commercial buildings, and industrial settings.

[0046] Taking HVAC equipment as an example, an air conditioning system can be a multi-split system for buildings, that is, multiple indoor units are connected in parallel with one or more outdoor units to form a refrigerant circuit so that the refrigerant can circulate. Figure 1 The diagram shows the structure of the outdoor unit 10 of the air conditioning system. The outdoor unit 10 has a casing 20, which houses a compressor, switching valve, outdoor heat exchanger, outdoor expansion valve, and oil separator, among other components. These components are connected by refrigerant piping. Additionally, the outdoor unit 10 includes a blower fan.

[0047] Furthermore, the outdoor unit 10 also includes an electrical control box 30. The housing 20 is the external structure of the HVAC equipment, protecting internal components, providing a mounting base, and optimizing airflow. The housing 20 can be made of metal or high-strength plastic, possessing good mechanical strength and corrosion resistance. The housing 20 can be rectangular and placed on the roof or ground. The housing 20 isolates internal live components from the outside environment, preventing direct contact by users and reducing the occurrence of safety accidents such as electric shock. The electrical control box 30 is the core control component of the HVAC equipment. Installed inside the housing 20, the electrical control box 30 facilitates maintenance and replacement, and also simplifies the installation and layout of the overall HVAC equipment structure. The electrical control box 30 is responsible for the precise control of the HVAC equipment's operation. It is equipped with various control circuits, using various electronic components and wiring to achieve control functions for the HVAC equipment, including starting, stopping, temperature adjustment, and mode switching.

[0048] The housing 20 provides protection for the electronic components inside the control box 30, preventing dust, moisture, oil, and other external impurities from entering. It also protects the control box 30 from extreme environmental conditions (such as temperature, humidity, and chemical corrosion), ensuring normal operation in various environments and extending the lifespan of the control box 30. The control box 30 contains high-voltage circuits and live components; housing them within the housing 20 prevents accidental contact by users, reduces the risk of electric shock, and improves safety. Furthermore, the housing 20 acts as a shield, reducing the impact of external electromagnetic interference on the electronic components inside the control box 30 and ensuring the stability and reliability of the control system.

[0049] like Figure 1 As shown, in this embodiment, the housing 20 is rectangular, while the electrical control box 30 has a length direction, which is arranged along the height direction (i.e., the vertical direction) of the housing 20. Therefore, the internal structure of the electrical control box 30 has a vertical arrangement. This vertical length arrangement can better meet the overall structural layout requirements of the equipment when the housing 20 has a large height and limited horizontal space, and is also conducive to heat dissipation and maintenance operations.

[0050] It should be noted that the present invention is not limited to the arrangement of the control box 30 along the height direction of the housing 20 in the above embodiments. In other embodiments, the control box 30 may also be arranged along the length direction of the housing 20, or the control box 30 may also be arranged along the width direction of the housing 20. Furthermore, the control box 30 may not be a single form extending along the length direction; it may also vary according to the internal space of the housing 20, for example, it may be formed into an approximate "L" shape, "T" shape, etc.

[0051] In some embodiments, an air duct is formed within the housing 20. This air duct guides air to flow along a predetermined path, preventing disordered airflow within the housing 20 and thus improving heat dissipation efficiency. Specifically, as exemplarily shown in the figure, the air supply fan is located at the top of the housing 20, i.e., at the top of the air duct, and blows air upwards. Furthermore, the electrical control box 30 is located within the air duct, thus utilizing the airflow within the air duct to remove the heat generated by the electrical control box 30, ensuring effective heat dissipation for the electrical control box 30.

[0052] Please continue reading. Figure 1 In some embodiments, the housing 20 is provided with an access port 20a. In one configuration, the housing 20 includes a housing body and an access door rotatably connected to the housing body, allowing maintenance personnel to expose the access port 20a by opening the access door. In another configuration, the housing 20 includes a housing body and a front panel connected to the housing body. The front panel is fixedly connected to the housing body by screws, allowing maintenance personnel to separate the front panel from the housing body by removing the screws to expose the access port 20a. This application does not impose specific limitations on the manner in which the access port 20a is exposed.

[0053] The electrical control box 30 is located at the access port 20a, allowing maintenance personnel to quickly access the electrical control box 30 without having to extend excessively into the casing 20, which greatly improves the efficiency of maintenance and repair.

[0054] Please see Figure 2 and Figure 3 In some embodiments, the control box 30 may include a cover 300, a plate-shaped heat dissipation plate 200, and a frequency converter drive module 100. The heat dissipation plate 200 and the cover 300 cooperate to form a mounting cavity 301. The heat dissipation plate 200 has a heat dissipation channel 201 for the flow of heat exchange medium, and the heat dissipation channel 201 flows through the plate portion of the heat dissipation plate 200 that forms the mounting cavity 301. The frequency converter drive module 100 is connected to the heat dissipation plate 200 and located within the mounting cavity 301. Thus, the heat dissipation plate 200 has a heat dissipation channel 201 inside, allowing the heat exchange medium to circulate within the channel, thereby achieving effective cooling of the frequency converter drive module 100. In addition, the heat dissipation channel 201 is disposed on the plate part of the heat dissipation cold plate 200 and the cover 300 to form the mounting cavity 301, so that the heat dissipation channel 201 is closer to the mounting cavity 301, which allows the heat generated by the frequency converter drive module 100 to be quickly conducted to the heat dissipation cold plate 200 and quickly carried away by the heat exchange medium, thereby further improving the heat dissipation efficiency of the frequency converter drive module 100.

[0055] Please see Figures 2 to 4The cover 300 and the heat dissipation plate 200 form the main structure of the electrical control box 30, serving to support and protect the frequency converter drive module 100, reducing the risk of displacement or damage to the frequency converter drive module 100 due to external vibration or impact during use. Integrating the frequency converter drive module 100 into a unified structure through the heat dissipation plate 200 and the cover 300 facilitates the overall design and assembly of the electrical control box 30, simplifying production and maintenance.

[0056] In addition, the control box 30 can isolate the frequency converter drive module 100 (high-voltage module) from other low-voltage control modules (such as the main control module 600) by placing the frequency converter drive module 100 separately in an independent mounting cavity 301 formed by the heat dissipation plate 200 and the box cover 300. This helps to reduce electromagnetic interference between modules and thus improves the stability and reliability of the entire control box 30.

[0057] Moreover, since the frequency converter drive module 100 is arranged independently, it helps to reduce the risk of wiring chaos caused by multiple modules being concentrated, thereby helping to simplify the internal wiring process of the control box 30.

[0058] Please see Figure 4 and Figure 6 The cover 300 has a first opening 302 on the side away from the heat dissipation plate 200, which connects the mounting cavity 301 and the outside. The frequency converter drive module 100 is provided with a terminal block 101, which is exposed in the first opening 302, so that the terminal block 101 is exposed to the outside through the first opening 302, which facilitates the connection and disconnection of external lines to the frequency converter drive module 100.

[0059] The electrical control box 30 also includes a first cover plate 400, which is detachably connected to the box cover 300 to cover or expose the first opening 302. This helps to effectively seal and protect the mounting cavity 301, preventing dust, impurities, etc. from the external environment from entering the electrical control box 30 and affecting the normal operation of the frequency converter drive module 100.

[0060] When wiring, debugging, replacement, or other maintenance operations are required for the frequency converter drive module 100, the user can remove the first cover plate 400 to open the first opening 302, thereby exposing the terminal block 101 of the frequency converter drive module 100 located in the mounting cavity 301, facilitating electrical connections or maintenance work. Under normal operating conditions, the first cover plate 400 can seal the mounting cavity 301, improving the overall dustproof and waterproof rating of the electrical control box 30 and ensuring the stable and reliable operation of the frequency converter drive module 100, etc.

[0061] The connection between the first cover plate 400 and the box cover 300 can be a snap-fit ​​connection, a screw connection, a plug-in structure, or other detachable connection methods suitable for repeated assembly and disassembly. These connection methods not only ensure the stability of the connection between the first cover plate 400 and the box cover 300, but also improve assembly efficiency and ease of later maintenance.

[0062] Furthermore, the first cover plate 400 may also be provided with an identification area for marking information such as module model, electrical parameters, and wiring instructions to facilitate identification and operation; or, the first cover plate 400 may also be provided with an observation window, which may be made of transparent or semi-transparent material, for observing the operating status indicator lights or key components of the module in the mounting cavity 301, thereby completing preliminary fault diagnosis and status monitoring without opening the cover plate, further improving human-machine interaction performance and the intelligence level of the equipment.

[0063] In some implementations, the first opening 302 may face the access port 20a, thereby facilitating the operator's maintenance of the electrical control box 30.

[0064] Please see Figure 6 The cover 300 is also provided with a connecting rib 310, which surrounds the edge of the first opening 302. The connecting rib 310 can be a raised structure with a certain height and thickness, and can be integrally formed with the cover 300, for example, by injection molding or stamping, and has good structural strength and processing convenience. The first cover plate 400 is detachably connected to the top or side of the connecting rib 310 to cover or expose the first opening 302. When the first cover plate 400 is connected to the connecting rib 310, the connecting rib 310, the cover 300 and the first cover plate 400 together form a second opening 303. The first opening 302 is connected to the external environment through the second opening 303, so that external cables can be electrically connected through the second opening 303 and the terminal block 101 installed on the first opening 302.

[0065] The presence of the connecting rib 310 provides the first cover plate 400 with higher positioning accuracy and support rigidity, making it less prone to displacement or shaking after installation, thereby improving the stability of the connection and the overall sealing performance, which is conducive to improving the dustproof and waterproof rating of the electrical control box 30; the setting of the second opening 303 not only provides guiding space for the entry and exit of cables, but also avoids the wear or squeezing problems that may be caused by the cables directly passing through the first opening 302, improving the safety and convenience of the wiring process.

[0066] Because the connecting rib 310 has a certain thickness and height, the first cover plate 400, when installed on the connecting rib 310, does not directly adhere to the surface of the box cover 300, but rather forms a certain gap between them. That is, the first cover plate 400 and the box cover 300 are not in tight contact, but are supported and lifted by the connecting rib 310, thus maintaining a distance between them. This gap also provides an additional buffer area for cable entry paths, helping to prevent cables from being squeezed or bent during insertion, further improving the safety and convenience of wiring operations. Furthermore, when the electrical control box 30 is in operation, the gap also facilitates air circulation, improving local heat dissipation to some extent, helping to reduce local temperature rise inside the box cover 300, and improving the reliability of electrical connections.

[0067] In some embodiments, the second opening 303 is located at the bottom of the cover 300. That is, when the control box 30 is in use, the second opening 303 is located at the bottom of the cover 300, facing the ground. When the first cover plate 400 is connected to the connecting rib 310 on the cover 300, the second opening 303 formed by the connecting rib 310, the cover 300, and the first cover plate 400 is located in the lower region of the cover 300, which can be the side near the ground or the mounting base. This helps guide external cables to be introduced from the bottom of the control box 30, avoiding rainwater infiltration or dust accumulation problems that may occur if cables enter from the top or side, thereby effectively improving the overall protection level of the control box 30 and enhancing its adaptability in humid or dusty environments. In addition, introducing external cables from the bottom of the cover 300 is more in line with the direction of gravity, which can reduce the bending angle of the cables, reduce mechanical stress damage caused by excessive bending, and improve the safety of wiring and the service life of the cables.

[0068] The electrical control box 30 also includes a seal (not shown in the figure), which is connected between the connecting rib 310 and the first cover plate 400 to seal the connection between them. The seal is positioned between the mating surfaces of the two parts and is compressed after the first cover plate 400 is installed, thus forming a reliable sealing interface. In this way, the seal not only effectively improves the overall dustproof and waterproof rating of the electrical control box 30, but also prevents dust, moisture, and other external impurities from entering the box cover 300 and affecting the normal operation of the frequency converter drive module 100 and other control components. Furthermore, it significantly enhances the equipment's adaptability to complex environments such as humid, dusty, or outdoor conditions, improving system stability and service life.

[0069] In addition, the seal also has a certain buffering effect. While achieving good sealing performance, it can absorb gaps caused by processing errors or installation deviations during assembly, reducing structural stress concentration problems caused by improper assembly. At the same time, the seal can also buffer the impact of external vibrations on the connection part of the first cover plate 400 to a certain extent, enhancing the connection stability between the first cover plate 400 and the connecting rib 310, thereby improving the mechanical strength and vibration resistance of the entire electrical control box 30 structure.

[0070] The seal can be made of elastic materials, such as rubber, silicone, or foam sealing strips, and has good compression resilience, aging resistance, and environmental adaptability. The seal can be configured as a ring structure arranged around the first opening 302, or it can be designed as multiple segmented sealing strips according to the actual structural requirements.

[0071] Please see Figure 2 The mounting cavity 301 includes a first cavity 304 and a second cavity (not shown) that are connected to each other. The cover 300 includes a first cover 320 and a second cover 330, which are respectively disposed on opposite sides of the heat dissipation plate 200. The first cover 320 cooperates with one side of the heat dissipation plate 200 to form a first cavity 304 for accommodating the main power circuit section of the frequency converter drive module 100, which generates significant heat. The second cover 330 cooperates with the other side of the heat dissipation plate 200 to form a second cavity for accommodating the relatively low-power, electromagnetically sensitive filter circuit section. The frequency converter drive module 100 includes a filter module and a drive module. The drive module, as the core control and power output unit, is installed within the first cavity 304, close to or near the heat dissipation plate 200, to achieve good heat conduction and heat dissipation. The filter module is used to filter the incoming power supply to suppress electromagnetic interference and improve system stability. The filter module is installed in the second cavity, away from the strong current path, thereby ensuring the accuracy of signal acquisition and control.

[0072] The terminal block 101 is fixedly connected to the drive module. The drive module is provided with the terminal block 101. The terminal block 101 is used to make electrical connections with external power sources or loads (such as fans or compressors). It is exposed to the external environment through the first opening 302 provided on the first cover 320 to facilitate the access and connection of external cables.

[0073] The first opening 302 is located on the side of the first cover 320 away from the heat dissipation plate 200, so that external cables can be introduced from the side of the first cover 320 to the drive module in the first cavity 304, while the second cavity where the filter module is located remains relatively closed, thereby achieving spatial isolation and functional decoupling between strong and weak currents.

[0074] In some embodiments, the variable frequency drive module 100 includes a drive board 110 and one or more of the following disposed on the drive board 110: a fan drive module, a compressor drive module, a fan drive chip, a compressor drive chip, a module power supply, a film capacitor, and an electrolytic capacitor. The electronic components disposed on the drive board 110 can be rationally distributed on different sides of the drive board 110 according to their heat generation, installation location requirements, and connection relationship with external loads.

[0075] Among them, the fan drive module and compressor drive module, as the main circuit components for power output, generate a high amount of heat. To improve their heat dissipation efficiency, the fan drive module and compressor drive module are positioned on the side of the drive plate 110 facing the heat dissipation plate 200, and form a good heat conduction path with the heat dissipation plate 200 through thermal pads, thermal adhesives, or direct bonding, thereby dissipating the heat generated during operation in a timely manner and preventing local overheating from affecting system stability.

[0076] The fan drive chip, compressor drive chip, module power supply, film capacitors, and electrolytic capacitors are located on the side of the drive board 110 away from the heat dissipation plate 200. These electronic components generate relatively little heat, and some are control or energy storage devices that are sensitive to electromagnetic interference. Placing them away from the heat dissipation plate 200 helps avoid performance degradation caused by high-temperature environments and also facilitates electromagnetic isolation from other low-voltage modules.

[0077] Thus, the aforementioned partitioned arrangement of components also helps simplify the assembly process. For example, modules with high power and requiring good heat dissipation can be preferentially installed on the side closer to the heat sink 200 for easy fixing and wiring; while control chips and capacitors are concentrated on the other side, which helps to unify the power supply line routing, reduce interference caused by cross wiring, and improve overall electrical performance.

[0078] In some implementations, both the fan drive module and the compressor drive module are in contact with the heat sink 200. For example, the contact between the fan drive module and the compressor drive module and the heat sink 200 can be point contact or surface contact. The fan drive module and the compressor drive module are in direct contact or indirect contact through thermally conductive interface materials (such as thermal pads, thermal adhesives, etc.), thereby establishing an efficient heat conduction path from the frequency converter drive module 100 to the heat sink 200.

[0079] The heat generated by the frequency converter drive module 100 during operation can be quickly transferred to the heat dissipation plate 200 and further dissipated into the environment through convection, radiation or external air cooling, effectively avoiding component aging, performance degradation or system failure caused by local overheating, and significantly improving the overall heat dissipation capacity and operational reliability of the control box 30.

[0080] Please see Figure 5 In some embodiments, the heat dissipation channel 201 surrounds the edges of the fan drive module and the compressor drive module. Thus, the position of the heat dissipation channel 201 corresponds to the edges of the fan drive module and the compressor drive module, effectively removing heat from the heat conduction surface and preventing the cooling medium from directly impacting the sensitive electronic components of the frequency converter drive module 100. This ensures good heat dissipation performance while also considering electrical safety and structural stability.

[0081] In some embodiments, the overall outline of the heat dissipation plate 200 is generally plate-shaped. The heat dissipation plate 200 is made of a metal material with good thermal conductivity, used for effective heat conduction and dissipation from the frequency converter drive module 100. The heat dissipation plate 200 and the cover 300 cooperate to form a mounting cavity 301. The frequency converter drive module 100 is disposed within the mounting cavity 301 and is in contact with or close to the heat dissipation plate 200 to achieve efficient heat transfer from the frequency converter drive module 100 to the heat dissipation plate 200. Thus, the control box 30 can achieve effective temperature control of the frequency converter drive module 100, ensuring its stability and reliability under high load operation. The structural design of the heat dissipation plate 200 improves the overall system's thermal management capability, while providing a good mounting foundation and protective environment for the frequency converter drive module 100.

[0082] The heat dissipation plate 200 has a flat surface, facilitating direct mounting of the drive board 110 or other heat-generating components in the frequency converter drive module 100. For example, the drive board 110 is fixed to the heat dissipation plate 200 with fasteners, ensuring a stable heat conduction path between them. Alternatively, a thermally conductive pad or adhesive may be provided between the drive board 110 and the heat dissipation plate.

[0083] The heat exchange medium circulates within the heat dissipation channel 201 to actively remove heat. The heat dissipation channel 201 is connected to an external cooling system to achieve continuous heat exchange. The outer surface of the heat dissipation plate 200 is also provided with multiple heat dissipation fins or heat dissipation structures to increase the contact area with air and improve the heat dissipation effect under natural heat dissipation or air cooling conditions.

[0084] The heat dissipation plate 200 may include a first plate 210 and a second plate 220. The first plate 210 may be stacked with the second plate 220. The heat dissipation channel 201 may be disposed on the first plate 210 and / or the second plate 220.

[0085] In some embodiments, the control box 30 further includes a flow channel connector 710, which is connected to the heat dissipation flow channel 201. The flow channel connector 710 is used to introduce and export the heat exchange medium, allowing the heat exchange medium to circulate between the external cooling system and the heat dissipation plate 200, thereby continuously removing the heat generated during the operation of the frequency converter drive module 100.

[0086] The flow channel connector 710 is arranged along the length of the heat dissipation plate 200, so that the extension direction of the flow channel connector 710 is consistent with the extension direction of the heat dissipation plate 200. This helps to achieve spatial coordination between the flow channel connector 710 and the heat dissipation plate 200, and avoids occupying extra installation space due to pipe bends or cross arrangements, so that the flow channel connector 710 and the heat dissipation plate 200 can be arranged more compactly.

[0087] In some embodiments, the frequency converter drive module 100 further includes one or more of a varistor, a differential-mode capacitor, or a common-mode capacitor, all located on the side of the filter board facing the heat dissipation plate 200. The varistor absorbs transient voltage surges that may occur at the power input terminal, preventing damage to downstream circuits due to voltage fluctuations; the differential-mode capacitor suppresses differential-mode interference signals, improving power quality; and the common-mode capacitor suppresses common-mode noise, further enhancing the system's electromagnetic compatibility performance. Thus, the varistor, differential-mode capacitor, and common-mode capacitor are all positioned on the side of the filter board facing the heat dissipation plate 200. This design allows the filtering components to be closer to the power circuitry on the drive board 110 side, thereby shortening the power input path, reducing line impedance and high-frequency noise radiation, and improving filtering efficiency. In addition, the varistors, differential mode capacitors and common mode capacitors are all located on the side of the filter board facing the heat dissipation plate 200. This not only helps to achieve a compact layout and reduce cable length and connection nodes, but also helps to provide auxiliary heat dissipation for some heat-generating components through the heat dissipation plate 200, avoiding excessive local temperature rise that could affect the filtering performance.

[0088] Please see Figure 3 In some embodiments, the control box 30 further includes a main control module 600. The first cover 320 has a third cavity 306, and the main control module 600 is installed inside the third cavity 306. The third cavity 306 is preferably an independent space formed by a partial recess or partition of the first cover 320, which has a certain degree of sealing and protection, and can effectively prevent external electromagnetic interference and dust from entering, thereby ensuring the stable operation of the main control module 600.

[0089] The opening of the third cavity 306 faces the same direction as the first opening 302. That is, the opening of the third cavity 306 is located on the side of the first cover 320 away from the heat dissipation plate 200, so that the main control module 600 and the first cavity 304 where the drive board 110 are located are consistent in spatial layout, which facilitates the unification of wiring direction, simplifies the external wiring path, and is beneficial to on-site construction and later maintenance.

[0090] In addition, since the main control module 600 is a low-voltage control unit and is sensitive to electromagnetic interference, it is independently set in the third cavity 306 inside the first cover 320. This not only achieves physical isolation between it and the high-voltage module, but also helps to reduce the electromagnetic coupling effect between the two and improve control accuracy and system stability.

[0091] A second cover plate 500 is provided at the opening of the third cavity 306, and the second cover plate 500 at least covers a portion of the wire passage groove 307. The second cover plate 500 at least covers a portion of the wire passage groove 307, preferably completely covering the wire passage groove 307 and its provided wire passage hole 308. This design effectively prevents dust, moisture, or other impurities from entering the third cavity 306 through the wire passage groove 307 when the second cover plate 500 is installed, thereby avoiding adverse effects on the main control module 600 and ensuring its operational stability and safety.

[0092] The second cover plate 500 is fixed to the first cover 320 in a detachable manner using snap-fit ​​connections, screw connections, or plug-in connections, allowing users to quickly open it when debugging, replacing, or maintaining the main control module 600 is required. Furthermore, the second cover plate 500 may also be equipped with sealing elements (such as rubber strips or silicone sealing rings) to enhance the sealing performance between it and the first cover 320, further improving the overall protection level of the electrical control box 30.

[0093] The outer contour of the second cover plate 500 is adapted to the open shape of the third cavity 306, and a partial protrusion or avoidance structure can be provided at the position corresponding to the wire groove 307 so as not to affect the passage of electrical connection wires and the arrangement of wiring paths while covering.

[0094] Please see Figure 5 and Figure 8 In some embodiments, the first cover 320 forming the third cavity 306 protrudes outward from the heat dissipation plate 200 along the arrangement direction of the first cavity 304 and the second cavity. That is, the third cavity 306 is formed by an extension structure of the heat dissipation plate 200 of the first cover 320.

[0095] Since the main control module 600 generates relatively little heat during operation and has lower requirements for heat dissipation performance, it does not need to be directly installed on the heat dissipation plate 200 with heat dissipation function. By placing the main control module 600 within the third cavity 306, which maintains a certain distance from the heat dissipation plate 200, direct contact between the main control module 600 and the heat dissipation plate 200 is avoided. This helps prevent condensation caused by the surface temperature of the heat dissipation plate 200 being lower than the dew point temperature when there are large changes in ambient temperature and humidity. This reduces the risk of the main control module 600 becoming damp, short-circuited, or corroded, and improves the overall operational stability and safety of the electrical control box 30.

[0096] Please see Figure 6 and Figure 7 In some embodiments, the open edge of the third cavity 306 is formed with a wire-passing groove 307, and the groove wall of the wire-passing groove 307 is configured with a wire-passing hole 308 connecting the first cavity 304 and the third cavity 306; the electrical control box 30 also includes an electrical connection wire (not shown in the figure), one end of the electrical connection wire is connected to the drive module, and the other end of the electrical connection wire extends into the third cavity 306 through the wire-passing hole 308 and is connected to the main control module 600.

[0097] The first cavity 304 and the third cavity 306 are spaced apart along the length of the first cover 320. One side wall of the first cavity 304 constitutes one side wall of the third cavity 306. That is, the first cavity 304 and the third cavity 306 are physically separated by sharing a side wall. The wire-passing groove 307 is formed at the connection between the shared side wall and the outer wall of the first cavity 304 (i.e., the L-shaped corner area). The wire-passing hole 308 is opened on the bottom wall of the groove.

[0098] The wire passage hole 308 can be formed at the center of the bottom wall of the wire passage groove 307, and multiple holes can be set. The wire passage hole 308 is directly connected to the second cavity through it.

[0099] The electrical connection wires leading from the drive module in the first cavity 304 enter the cable guide groove 307 along the shared sidewall, bend and turn within the groove, extend into the third cavity 306 through the cable guide hole 308, and then connect to the main control module 600. The entire wiring path is roughly a "Z" shaped structure, with a compact and orderly wiring layout. Simultaneously, the concealed wiring in the cable guide groove 307 avoids cable crossing and tangling within the cavities, making the internal structure more regular and facilitating modular assembly.

[0100] In some embodiments, the first cover 320 further includes a sealing groove 309, which surrounds the open edge of the first cavity 304. The heat dissipation plate 200 closes the opening of the sealing groove 309. The sealing groove 309 can have a rectangular or trapezoidal cross-sectional shape and can be formed on the first cover 320 using processes such as injection molding, CNC milling, or stamping. When the heat dissipation plate 200 is placed over the open edge of the first cavity 304, the edge of the heat dissipation plate 200 covers and closes the opening of the sealing groove 309, creating a relatively independent sealed space. The heat dissipation plate 200 and the first cover 320 can be fixed by bolts, snap-fit ​​connections, or welding.

[0101] In this embodiment, the sealing groove 309 is filled with sealing material, such as an elastic sealing ring or liquid sealant. When the heat dissipation plate 200 is assembled with the first cover 320, the sealing material is compressed, resulting in elastic deformation or a curing reaction, filling the tiny gap between the sealing groove 309 and the heat dissipation plate 200, forming a continuous sealing barrier, thereby preventing external dust, moisture, etc. from entering the first cavity 304 and protecting the internal electronic components such as the drive board 110.

[0102] In some embodiments, the mounting cavity 301 includes a first cavity 304, which is formed by a first cover 320 in the cover 300 and a heat dissipation plate 200. The first cover 320 is located on one side of the heat dissipation plate 200, and the first cover 320 and the heat dissipation plate 200 fit tightly together to form a well-sealed first cavity 304 for housing key electronic components in the frequency converter drive module 100.

[0103] The variable frequency drive module 100 includes a filter board and a drive board 110. The drive board 110 integrates core components such as drive circuits, power devices, and drive control chips, and is responsible for driving and controlling load equipment such as fans and compressors. The filter board is used to filter the power signal, suppress high-frequency noise, and improve the system's stability and anti-interference capability. In this embodiment, the filter board and the drive board 110 are both installed inside the same first cavity 304, that is, they share a sealed space, which helps to simplify the overall layout, reduce the overall size of the electrical control box 30, and facilitate unified thermal management and electromagnetic shielding design.

[0104] 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.

[0105] 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. An electrical control box, characterized in that, include: Box lid; A heat dissipation cold plate with a plate-like structure, wherein the heat dissipation cold plate and the cover cooperate to form a mounting cavity, wherein the heat dissipation cold plate is provided with heat dissipation channels for the flow of heat exchange medium, and the heat dissipation channels flow through the plate body portion of the heat dissipation cold plate that cooperates to form the mounting cavity; and The frequency converter drive module is connected to the heat dissipation plate and located inside the mounting cavity.

2. The electrical control box as described in claim 1, characterized in that, The mounting cavity includes a first cavity and a second cavity that are connected to each other; The box cover includes a first cover body and a second cover body respectively disposed on opposite sides of the heat dissipation plate. The first cover body cooperates with the heat dissipation plate to form the first cavity, and the second cover body cooperates with the heat dissipation plate to form the second cavity. The frequency conversion drive module includes a filter module and a drive module. The drive module is installed in the first cavity, and the filter module is installed in the second cavity.

3. The electrical control box as described in claim 2, characterized in that, The drive module includes a drive board and one or more of the following disposed on the drive board: a fan drive module, a compressor drive module, a fan drive chip, a compressor drive chip, a module power supply, a film capacitor, or an electrolytic capacitor. The fan drive module and the compressor module are located on the side of the drive board facing the heat dissipation plate, while the fan drive chip, the compressor drive chip, the module power supply, the film capacitor, and the electrolytic capacitor are all located on the side of the drive board away from the heat dissipation plate.

4. The electrical control box as described in claim 3, characterized in that, Both the fan drive module and the compressor drive module are in contact with the heat dissipation plate.

5. The electrical control box as described in claim 4, characterized in that, The heat dissipation plate is provided with heat dissipation channels, which surround the edges of the fan drive module and the compressor drive module.

6. The electrical control box as described in claim 2, characterized in that, The variable frequency drive module includes a filter board and one or more of a varistor, a differential-mode capacitor, or a common-mode capacitor disposed on the filter board. The varistor, the differential-mode capacitor, and the common-mode capacitor are all located on the side of the filter board facing the heat dissipation plate.

7. The electrical control box as described in claim 2, characterized in that, The electrical control box also includes a main control module, and the first cover has a third cavity in which the main control module is installed.

8. The electrical control box as described in claim 7, characterized in that, Along the arrangement direction of the first cavity and the second cavity, the first cover forming the third cavity protrudes outward from the heat dissipation plate.

9. The electrical control box as described in claim 7, characterized in that, The open edge of the third cavity forms a wire-passing groove, and the groove wall of the wire-passing groove forms a wire-passing hole that connects the first cavity and the third cavity; the electrical control box also includes an electrical connection wire, one end of which is connected to the drive module, and the other end of which extends into the third cavity through the wire-passing hole and is connected to the main control module.

10. The electrical control box as described in claim 2, characterized in that, The first cover also has a sealing groove, which is arranged around the open edge of the first cavity, and the heat dissipation plate closes the opening of the sealing groove.

11. The electrical control box as described in claim 1, characterized in that, The mounting cavity includes a first cavity; The box cover includes a first cover body, which cooperates with the heat dissipation plate to form the first cavity, and the first cavity is located on one side of the heat dissipation plate; The frequency conversion drive module includes a filter module and a drive module, both of which are installed in the first cavity.

12. The electrical control box as described in claim 1, characterized in that, The electrical control box also includes a flow channel connector extending along the length of the heat dissipation plate, and the flow channel connector is connected to the heat dissipation flow channel.

13. The electrical control box as described in any one of claims 1 to 12, characterized in that, The frequency conversion drive module is provided with a terminal block, and the side of the cover away from the heat dissipation plate has a first opening that connects the mounting cavity to the outside, and the terminal block is exposed in the first opening; The electrical control box also includes a first cover plate, which is detachably connected to the box cover to cover or expose the first opening.

14. The electrical control box as described in claim 13, characterized in that, The box lid is provided with a connecting rib, which surrounds the edge of the first opening. The first cover plate is detachably connected to the connecting rib. When the first cover plate is connected to the connecting rib, the connecting rib, the box lid, and the first cover plate cooperate to form a second opening, through which the first opening communicates with the outside world.

15. The electrical control box as described in claim 14, characterized in that, The second opening is located at the bottom of the lid.

16. The electrical control box as described in claim 14, characterized in that, The electrical control box also includes a sealing element connected between the connecting rib and the first cover plate to seal the connection between the connecting rib and the first cover plate.

17. A heating, ventilation, and air conditioning (HVAC) device, characterized in that, It includes a housing and an electrical control box as described in any one of claims 1 to 16, wherein the electrical control box is disposed within the housing.

18. The HVAC equipment as described in claim 17, characterized in that, The housing is provided with an inspection port; the electrical control box is located at the inspection port.

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