Electric control box and heating and ventilation equipment

Abstract

The utility model discloses an electric control box and heating and ventilation equipment, the electric control box comprises a box body, a first circuit module, a second circuit module, a first box cover and a heat dissipation structure, the box body is provided with a first cavity and a second cavity which are mutually independent, and the first cavity and the second cavity are both provided with openings; the opening direction of the first cavity is opposite to the opening direction of the second cavity, the first circuit module is arranged in the first cavity, the second circuit module is electrically connected with the first circuit module and is arranged in the second cavity, the first box cover is connected with the box body and covers the opening of the first cavity to seal the first cavity, and the heat dissipation structure is connected with the box body. And the sealing cover covers the opening of the second cavity so as to seal the second cavity. According to the technical scheme, the cavity dividing design is carried out in the electric control box, so that different circuit modules in the electric control box are arranged in different cavities respectively, and the problem that an existing electric control box is difficult to maintain due to the fact that all modules are integrally assembled is solved.

Description

Technical Field

[0001] This application relates to the field of electrical control box 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 component of HVAC equipment, the electrical control unit is primarily responsible for controlling and managing the operation of HVAC equipment, especially the outdoor unit. Its main functions include controlling the operation of the compressor and fan, frequency converter control, and communication with other components. In related technologies, the various modules of the electrical control unit are typically assembled and protected within a single enclosure, commonly referred to as an electrical control box. However, some modules require maintenance after a period of use, and the complex and interwoven wiring between these modules makes maintenance prone to accidental activation, potentially leading to circuit faults or parameter malfunctions. This significantly increases the difficulty of maintaining the electrical control box. Utility Model Content

[0004] This application provides an electrical control box that solves the problem of difficult maintenance caused by the overall assembly of various modules in existing electrical control boxes.

[0005] In a first aspect, embodiments of this application provide an electronic control box, including:

[0006] The box body is provided with a first cavity and a second cavity that are independent of each other. Both the first cavity and the second cavity have openings, and the opening of the first cavity faces the opposite direction to the opening of the second cavity.

[0007] The first circuit module is located within the first cavity;

[0008] The second circuit module is electrically connected to the first circuit module and is disposed in the second cavity;

[0009] A first lid, connected to the box body, covers the opening of the first cavity to seal the first cavity; and

[0010] A heat dissipation structure is connected to the housing and covers the opening of the second cavity to seal the second cavity.

[0011] In one embodiment, the housing includes:

[0012] Peripheral sidewalls;

[0013] First cavity back wall;

[0014] The second cavity back wall, and the first cavity back wall, are disposed on two opposite sides of the peripheral side wall; and,

[0015] A partition wall is disposed within the space enclosed by the peripheral sidewalls, and the first cavity back wall, the partition wall, and the peripheral sidewalls constitute the first cavity, while the second cavity back wall, the peripheral sidewalls, and the partition wall constitute the second cavity.

[0016] In one embodiment, a first wiring port is provided on the back wall of the second cavity, and the electrical control box further includes:

[0017] The compressor connector passes through the first wiring port and is electrically connected to the second circuit module.

[0018] In one embodiment, a second wiring port is provided on the back wall of the second cavity, and the electrical control box further includes:

[0019] The fan connector is threaded through the second wiring port and electrically connected to the second circuit module.

[0020] In one embodiment, a positioning rib is provided on the back wall of the second cavity protruding on the side opposite to the first cavity, and the electrical control box further includes:

[0021] A wiring sealing cover is sleeved on the outside of the positioning rib, and the inner wall surface of the wiring sealing cover abuts against the circumferential surface of the positioning rib.

[0022] In one embodiment, a notch is provided on the side of the back wall of the second cavity near the first cavity, and the notch communicates with the first cavity. When the first cover is closed on the box body, the communication line connected to the first circuit module can pass through the notch and extend out of the first cavity.

[0023] In one embodiment, the partition wall is provided with a wire passage, which connects to the notch, so that the communication line electrically connected to the first circuit module can pass through the wire passage and the notch in sequence and extend out of the first cavity.

[0024] In one embodiment, the electrical control box further includes:

[0025] Power connector;

[0026] The heat dissipation structure extends out of the box body from the side away from the first cavity, and the portion of the heat dissipation structure extending out of the box body is provided with an electrical heat exchange section. The power supply terminal is located in the electrical heat exchange section and exchanges heat with the electrical heat exchange section.

[0027] In one embodiment, the electrical control box further includes:

[0028] The power protection cover has a power protection cavity for accommodating the power terminal block, located on one side of the box body, and covers the power-connecting heat exchange part.

[0029] In one embodiment, the electrical control box further includes:

[0030] The third circuit module, positioned opposite the second circuit module on opposite sides of the heat dissipation structure, exchanges heat with the heat dissipation structure. The power connector passes through the heat dissipation structure and is electrically connected to the third circuit module.

[0031] The second cover has a second cover cavity for accommodating the third circuit module. It is located on the side of the heat dissipation structure facing away from the box body and covers the heat dissipation structure.

[0032] In one embodiment, the second circuit module is a driver board, the third circuit module is a filter board, the first circuit module includes a main control power board and a main control board electrically connected to each other, and the control box further includes:

[0033] The electrical connection includes a power supply line and a signal line. The power supply line is used to electrically connect the main control power board and the filter board, and the signal line is used to electrically connect the main control board and the driver board.

[0034] In one embodiment, the first lid has a first hinge portion, and the box body has a second hinge portion, wherein the first hinge portion and the second hinge portion are hinged together.

[0035] In one embodiment, the heat dissipation structure includes a heat dissipation plate with heat dissipation channels for the flow of heat exchange medium.

[0036] In one embodiment, the heat sink includes a first plate and a second plate, wherein at least one of the first plate and the second plate is provided with a flow channel groove, and the other of the first plate and the second plate covers the flow channel groove to form a heat dissipation flow channel;

[0037] Alternatively, the heat sink may include a first plate, a second plate, and a flow channel, wherein the flow channel is confined between the first plate and the second plate, and the heat dissipation flow channel is provided inside the flow channel.

[0038] In one embodiment, within the projection range of the second cavity in the first direction, the heat dissipation channel extends in a meandering manner along the second direction, the first direction being perpendicular to the first plate, and the first direction being perpendicular to the second direction.

[0039] Secondly, embodiments of this application also provide a heating, ventilation, and air conditioning (HVAC) device, which includes a housing and the aforementioned electrical control box, wherein the electrical control box is disposed within the housing.

[0040] In one embodiment, the housing is provided with an access port, and the electrical control box is located at the access port; wherein, the first cavity is disposed facing the access port.

[0041] Based on the above embodiments, the electrical control box proposed in this application has a first cavity and a second cavity that are independent of each other and have opposite opening directions. That is, the electrical control box is designed with separate cavities, and the first circuit module and the second circuit module are arranged in separate cavities. The opening directions of the first cavity and the second cavity are designed to be opposite. This is conducive to setting the circuit modules that need to be maintained and installed in the first cavity, so that maintenance personnel can quickly identify each circuit module and the wiring between each circuit module is simpler and clearer. This allows for targeted inspection and maintenance of the modules that need to be maintained in daily life, improving maintenance efficiency. This solves the problem of difficult maintenance caused by the overall assembly of each module in existing electrical control boxes, and is also beneficial to the daily maintenance of electrical control boxes in HVAC equipment.

[0042] In addition, it also achieves physical isolation of electromagnetic interference, avoiding the risk of mutual electromagnetic interference caused by the common cavity arrangement of various modules. Furthermore, the first box cover seals the first cavity to improve protection performance, while the heat dissipation structure seals the second cavity, providing a dedicated heat dissipation channel for high-power modules while ensuring the protection level. In this way, it can protect different circuit modules and also facilitate targeted heat dissipation for high-power modules. Attached Figure Description

[0043] 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.

[0044] Figure 1 This is a schematic diagram of the overall structure of the outdoor unit of this application;

[0045] Figure 2 This is a partial assembly diagram of the electrical control box of this application;

[0046] Figure 3 This is a first-view structural diagram of the electrical control box of this application in the open state;

[0047] Figure 4 This is a structural schematic diagram of the electrical control box of this application in the open state from a second perspective.

[0048] Figure 5 This is an exploded view of the overall structure of the electrical control box in this application.

[0049] Explanation of icon numbers:

[0050] 100 - Electrical control box; 11 - Box body; 111 - First cavity; 112 - Second cavity; 113 - Peripheral side wall; 114 - Back wall of the first cavity; 115 - Back wall of the second cavity; 116 - Partition wall; 117 - Second hinge part; 118 - Notch; 1181 - Wiring port; 1191 - First wiring port; 1192 - Second wiring port; 110 - Positioning rib; 121 - First box cover; 1211 - First hinge part; 13 - Heat dissipation structure; 131 - First plate; 132 - Second plate; 133 - Flow channel groove; 134 - First opening; 135 - Electrical connection heat exchange part.

[0051] 2-Outdoor unit, 200-House casing, 201-Inspection door.

[0052] 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

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] Taking HVAC equipment as an example, the air conditioning system can be a multi-split system for buildings, that is, multiple indoor units are connected in parallel relative to one or more outdoor units 2, forming a refrigerant circuit so that the refrigerant can circulate. Figure 1 The diagram shows the outdoor unit 2 of the air conditioning system. The outdoor unit 2 has a casing 200, inside which are housed a compressor, switching valve, outdoor heat exchanger, outdoor expansion valve, and oil separator, etc. These components are connected by refrigerant piping. Additionally, an air supply fan is installed in the outdoor unit 2.

[0059] Furthermore, the outdoor unit 2 also includes an electrical control box 100. The housing 200 is the external structure of the HVAC equipment, protecting internal components, providing a mounting base, and optimizing airflow. The housing 200 can be made of metal or high-strength plastic, possessing good mechanical strength and corrosion resistance. The housing 200 can be rectangular and placed on the roof or ground. The housing 200 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 100 is the core control component in the HVAC equipment. Installed inside the housing 200, the electrical control box 100 facilitates maintenance and replacement, and also simplifies the installation and layout of the overall HVAC equipment structure. The electrical control box 100 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.

[0060] The housing 200 provides protection for the electronic components inside the control box 100, preventing dust, moisture, oil, and other external impurities from entering. It also protects the control box 100 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 100. The control box 100 contains high-voltage circuits and live components; housing them within the housing 200 prevents accidental contact by users, reducing the risk of electric shock and improving safety. Furthermore, the housing 200 also acts as shielding, reducing the impact of external electromagnetic interference on the electronic components inside the control box 100, ensuring the stability and reliability of the control system.

[0061] In this embodiment, the housing 200 is rectangular, while the electrical control box 100 has a length direction, which is arranged along the height direction (i.e., the vertical direction) of the housing 200. Therefore, the internal structure of the electrical control box 100 has a vertical arrangement. This vertical length arrangement can better meet the overall structural layout requirements of the equipment when the housing 200 has a large height and limited horizontal space, and is also conducive to heat dissipation and maintenance operations.

[0062] It should be noted that the present invention is not limited to the arrangement of the control box 100 along the height direction of the housing 200 in the above embodiments. In other embodiments, the control box 100 may also be arranged along the length direction of the housing 200, or the control box 100 may be arranged along the width direction of the housing 200. Furthermore, the control box 100 may not be a single form extending along the length direction; it may also vary according to the internal space of the housing 200, for example, it may be formed into an approximate "L" shape, "T" shape, etc.

[0063] In some embodiments, an air duct is formed within the housing 200. This air duct guides air to flow along a predetermined path, preventing disordered airflow within the housing 200 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 200, i.e., at the top of the air duct, and blows air upwards. Furthermore, the electrical control box 100 is located within the air duct, thus utilizing the airflow within the air duct to remove the heat generated by the electrical control box 100, ensuring effective heat dissipation for the electrical control box 100.

[0064] Please continue reading. Figure 1 In some embodiments, the housing 200 is provided with an access port. In one configuration, the housing 200 includes a housing body and an access door 201 rotatably connected to the housing body, allowing maintenance personnel to expose the access port by opening the access door 201. In another configuration, the housing 200 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. This application does not impose specific limitations on the manner in which the access port is exposed.

[0065] The electrical control box 100 is located at the access port, allowing maintenance personnel to quickly access it without having to extend excessively into the casing 200, thus greatly improving the efficiency of maintenance and repair.

[0066] This application optimizes the structure of the electrical control box 100. Please refer to the following for details. Figure 2 , Figure 3 and Figure 4The control box 100 includes a box body 11, a first circuit module, a second circuit module, a first cover 121, and a heat dissipation structure 13. The first circuit module can be an independent control unit or functional module that works in conjunction with the second circuit module. The box body 11 is provided with independent first cavities 111 and second cavities 112. Both the first cavity 111 and the second cavity 112 have openings, and the opening orientation of the first cavity 111 is opposite to that of the second cavity 112. The first circuit module is located in the first cavity 111, and the second circuit module is electrically connected to the first circuit module and located in the second cavity 112, thus achieving physical isolation between high and low power modules or different functional modules. The first cover 121 is connected to the box body 11 and covers the opening of the first cavity 111 to seal the first cavity 111, effectively preventing the intrusion of external impurities such as dust and liquids. Combined with the overall protection of the control box 100 by the housing 200, it further enhances the dustproof and waterproof rating of the first circuit module, especially suitable for first circuit modules with high protection requirements, preventing short circuits and other faults caused by external environmental interference. The heat dissipation structure 13 is connected to the box body 11 and covers the opening of the second cavity 112 to seal the second cavity 112. This effectively and quickly conducts the heat generated by the second circuit module away, ensuring the second cavity 112 is sealed while continuously removing heat, preventing heat accumulation in the second cavity 112, and ensuring the stable operation of the second circuit module.

[0067] Understandably, the box body 11 can be sealed to the edge of the first box cover 121 by means of a silicone sealing ring or an elastic sealing strip, and the box body 11 can be sealed to the edge of the heat dissipation structure 13 by means of a silicone sealing ring or an elastic sealing strip, thereby further improving the sealing performance of the first cavity 111 and the second cavity 112.

[0068] Based on the above method, when the control box 100 is working, the heat generated by the high-power module (such as the compressor control circuit) in the second cavity 112 can form a linkage heat dissipation mechanism through the heat dissipation structure 13 and the air duct inside the casing 200—the airflow driven by the air supply fan in the air duct (such as... Figure 1The air supply fan (located at the top of the housing 200, blowing upwards) can flow over the surface of the heat dissipation structure 13, using air convection to quickly remove the heat dissipated by the second cavity 112, solving the problem of poor heat dissipation in traditional fully enclosed structures. Simultaneously, the fully enclosed design of the first cavity 111 and the heat dissipation sealing design of the second cavity 112 form a functional partition, satisfying both the sealing requirements of the high-protection module and achieving effective heat dissipation for the high-power module, breaking the technical bottleneck of the traditional open-sealing method of the housing 11 where protection and heat dissipation are difficult to balance. Furthermore, the arrangement of the electrical control box 100 within the housing 200 can be optimized by considering its length and its compatibility with the height, length, or width of the housing 200, further optimizing the internal space utilization of the housing 200. The first cover 121 faces the access port, meaning the first cavity 111 is positioned facing the access port. This design fully considers the ease of operation for maintenance personnel. When maintenance is required, personnel can easily open the first cover 121 and directly access the second cavity 112, greatly improving maintenance efficiency. Meanwhile, the heat dissipation structure 13 faces away from the maintenance port, eliminating the need for frequent disassembly and reassembly during routine maintenance. This layout design effectively ensures the structural stability of the equipment during operation and guarantees that the heat dissipation structure 13 can continuously and efficiently perform its heat dissipation function, maintaining the equipment in good operating condition, extending the overall service life of the electrical control box 100, and ensuring the long-term stable operation of the HVAC equipment in complex environments.

[0069] In the above description, the heat dissipation structure 13 includes a heat sink with heat dissipation channels for the flow of heat exchange medium. In this way, the heat exchange medium (such as coolant) flowing in the heat dissipation channels within the heat sink can fully exchange heat with the heat generated by the second circuit module, quickly carrying the heat out of the channels. Combined with the airflow within the casing 200, this forms a dual heat dissipation path. On one hand, the forced circulation of the heat exchange medium within the channels significantly improves heat transfer efficiency, preventing localized heat accumulation within the second cavity 112. On the other hand, when the airflow passes over the surface of the heat sink, convection further enhances the heat dissipation effect, allowing the second circuit module to maintain a lower temperature even during high-power operation. This effectively prevents circuit performance degradation or component aging due to overheating, thereby ensuring the overall stability and reliability of the electrical control box 100 and extending its service life under complex operating conditions.

[0070] In this embodiment, please refer to the following for details. Figure 3 , Figure 4 and Figure 5The aforementioned heat dissipation structure 13 includes a first plate 131 and a second plate 132. The first plate 131 is precisely positioned over the opening of the second cavity 112 and tightly abuts against the housing 11. Its material is preferably aluminum alloy or copper alloy with high thermal conductivity. Through large-area contact with the inner wall of the second cavity 112, it achieves efficient heat conduction, quickly absorbing the heat generated by the second circuit module (such as a high-power frequency converter control module) during operation onto the surface of the first plate 131. The second plate 132 is located on the side of the first plate 131 facing away from the main body of the housing 11. It is sealed to the edge of the first plate 131 using a silicone sealing ring or elastic sealing strip, forming a double protective barrier for the second cavity 112, preventing dust and liquid from entering through the joint between the heat dissipation structure 13 and the housing 11.

[0071] The key lies in the design of a heat dissipation channel between the first plate 131 and the second plate 132. Specifically, at least one of the first plate 131 and the second plate 132 has a channel groove 133 on its surface. For example, the surface of the first plate 131 is milled with a serpentine or honeycomb groove, and the other plate 132 is fitted with the groove through a planar or complementary structure to jointly form a through-flow heat dissipation channel. This heat dissipation channel is used to guide the flow of refrigerant, such as air or liquid, i.e., to remove heat through air cooling or water cooling. When the refrigerant flows over the surface of the first plate 131, it quickly absorbs the heat generated by the high-power module, and its temperature rises. Then, carrying the heat, it flows out from the other end of the channel and enters the subsequent cooling stage. This cycle repeats continuously, building a highly efficient forced convection heat dissipation system. Compared to the inefficient method of relying on natural heat dissipation in traditional fully enclosed boxes 11, the flow rate of the refrigerant in the heat dissipation channel is significantly improved, greatly enhancing the heat exchange efficiency. This effectively stabilizes the temperature of the second cavity 112 within a safe threshold, effectively avoiding problems such as aging and failure of electronic components caused by overheating of high-power modules.

[0072] Preferably, within the projection range of the first direction A (i.e., the vertical spatial axis perpendicular to the surface of the first plate 131) of the second cavity 112, the heat dissipation channel extends in a meandering serpentine or wavy shape along the second direction B (such as horizontal) perpendicular to the first direction A. This spatial layout, through precise three-dimensional structural design, maximizes the path length of the heat dissipation channel within a limited projection area. When the refrigerant flows into the heat dissipation channel, the meandering path forces the fluid to change its flow direction multiple times, which not only prolongs the contact time between the refrigerant and the first plate 131, but also enhances the heat exchange efficiency through the turbulence effect caused by the sudden change in direction.

[0073] The core advantage of this design lies in achieving a geometric improvement in heat dissipation efficiency within a limited space: the vertical projection constraint in the first direction A ensures that the flow channel layout does not occupy additional internal space of the housing 200, adapting to the compact installation requirements of the electrical control box 100 and the housing 200; while the meandering extension in the second direction B compensates for the insufficient heat dissipation capacity of traditional straight-through flow channels by increasing the fluid path length and contact area. At the same time, the folding structure of the flow channel can form natural turbulence units, causing the refrigerant to generate vortices when turning, breaking down the boundary layer thermal resistance and further improving heat dissipation efficiency.

[0074] Understandably, the use of gradually expanding or turbulent structures within the heat dissipation channel can induce a strong turbulent effect in the refrigerant, further unlocking its heat dissipation potential. Furthermore, the second plate 132 can be made of an elastic material, which can flexibly compensate for the slight deformation of the first plate 131 caused by thermal expansion, ensuring that the heat dissipation channel maintains good sealing and reliability during long-term uninterrupted operation of the equipment.

[0075] Thus, the linkage design of the heat dissipation structure 13 and the air duct of the housing 200 successfully resolves the contradiction between protection and heat dissipation in existing electrical control devices. This allows the electrical control box 100 to not only cope with the challenges of dust and water resistance in complex environments, but also to provide long-lasting and efficient heat dissipation support for high-power modules. This extends the service life of HVAC equipment while comprehensively improving the stability and safety of HVAC equipment operation.

[0076] Understandably, the aforementioned heat sink can also take other structural forms. In other embodiments, the heat sink includes a first plate 131, a second plate 132, and a flow channel (not shown in the figure). The flow channel is confined between the first plate 131 and the second plate 132, and a heat dissipation channel is provided inside the flow channel. This simplifies the production process by prefabricating standardized flow channel tubes. This design can optimize the refrigerant flow resistance by utilizing the regular inner wall of the tube, and can flexibly adjust the heat dissipation capacity by replacing different specifications of flow channel tubes, further improving structural compatibility and maintenance convenience. At the same time, the combination and sealing of the first plate 131, the second plate 132, and the tube ensures both heat dissipation efficiency and protection performance.

[0077] In addition to the heat dissipation structure 13 that utilizes the first plate 131 and the second plate 132 in conjunction with the flow channel groove 133, an integrated finned heat dissipation structure 13 can also be used to achieve efficient heat dissipation. For example, the heat dissipation structure 13 can have an outwardly extending fin group composed of multiple parallel thin metal sheets (such as aluminum or copper sheets). When the fan drives air upward along the top of the housing 200, the high-speed airflow can directly wash over the fin surface, carrying away the heat absorbed by the fins through forced convection. This design does not require an additional second plate 132 and flow channel structure. By utilizing the fin group to increase the heat dissipation area, it can also enhance heat exchange efficiency and is equally suitable for high-power modules with concentrated heat sources. Furthermore, a graphene thermally conductive coating can be sprayed onto the surface of the fin group to further enhance the thermal radiation capability. Alternatively, micro heat pipes can be installed between the fins to quickly conduct heat to the condensation end outside the housing 200 using the phase change heat transfer principle, forming a composite heat dissipation system.

[0078] After explaining the innovative design of the heat dissipation structure 13, we will now focus on the overall structure of the housing 11. Specifically, please refer to... Figures 2 to 5 As shown, the box 11 includes a peripheral side wall 113, a first cavity back wall 114, a second cavity back wall 115, and a partition wall 116. The peripheral side wall 113 serves as the outer supporting structure of the box 11 and can be injection molded from high-strength aluminum alloy or engineering plastic, combining lightweight and impact resistance. The first cavity back wall 114 and the second cavity back wall 115 are respectively fixed to the left and right sides (or the front and rear sides, adjusted according to the installation direction of the housing 200) of the peripheral side wall 113, forming a double-end support structure for the box 11. The materials of both can be insulating and flame-retardant glass fiber reinforced composite materials to ensure electrical safety, or they can be integrally molded with the peripheral side wall 113 to better ensure the overall structural strength of the box 11.

[0079] Please refer to the details. Figure 3 , Figure 4 and Figure 5 The aforementioned partition wall 116 not only provides mechanical support but also blocks electromagnetic interference between the two chambers through its insulating material, thereby improving the stability of the control system. Combined with the first cover 121 enclosing the first cavity 111 and the overall protection of the housing 200, it effectively resists the erosion of precision circuits by oil and corrosive gases. In some embodiments, the second cavity 112 can rapidly conduct the heat generated by the high-power module to the peripheral wall 113 and / or the heat dissipation structure 13 through the thermal conductivity design of the partition wall 116 and the peripheral sidewall 113 (such as a copper heat-conducting strip built into the partition wall 116). Combined with the airflow in the housing 200's air duct, this forms a multi-stage heat conduction path, further improving the heat diffusion efficiency of the housing 11.

[0080] Understandably, the partition wall 116 can be integrally formed with the peripheral side wall 113, the first cavity back wall 114, and the second cavity back wall 115. Furthermore, the partition wall 116 can be detachably connected to the peripheral side wall 113, using at least one connection method such as snap-fit ​​or bolt connection, facilitating later maintenance and significantly improving maintenance convenience. This housing 11, through precise matching of spatial division and material properties, systematically solves the contradiction between protection and heat dissipation in traditional electrical control devices, laying a solid structural foundation for the reliable operation of HVAC equipment under complex conditions.

[0081] After describing the overall structure of the box body 11, the focus shifts to the connection structure between the box body 11 and the first lid 121. The first lid 121 employs a hinged opening and closing design to enhance maintenance convenience. Specifically, the edge of the first lid 121 has a first hinge portion 1211, which can be made of corrosion-resistant stainless steel or engineering plastic, possessing wear-resistant and deformation-resistant properties. A second hinge portion 117 is provided on the corresponding side wall 113 of the box body 11. The two are hinged together by a pin or bushing structure, allowing the first lid 121 to rotate freely around the hinge axis. Compared to traditional screw fixing, this hinged connection method reduces the risk of screw loss during disassembly, while ensuring precise alignment between the first lid 121 and the box body 11 when closed, achieving a reliable seal in conjunction with the silicone sealing ring at the edge.

[0082] For further details, please refer to Figure 3 , Figure 4 and Figure 5 The heat dissipation structure 13 can be connected and fixed to the peripheral wall 113 via fasteners (such as countersunk screws). The spacing between the fasteners is precisely calculated based on the dimensions of the first plate 131 to ensure uniform compression and eliminate contact thermal resistance. For scenarios requiring frequent maintenance, a combination of quick-release clips and elastic pressure strips can be used for connection. That is, an L-shaped clip groove is provided on the outer side of the peripheral wall 113, and the protruding clips on the edge of the first plate 131 can be directly embedded into the groove for quick positioning. Then, the elastic pressure strip is rotated to lock, allowing for disassembly and assembly without tools, thus improving maintenance efficiency. In addition, the connection between the heat dissipation structure 13 and the peripheral wall 113 can be designed as a stepped mating surface. The stepped surface of the first plate 131 is embedded into the groove of the peripheral wall 113, forming a mechanical stop while enhancing the sealing performance.

[0083] In this embodiment, the second circuit module provides physical mounting locations for various electronic components (such as capacitors, resistors, chips, connectors, etc.). Additionally, the control box 100 also includes a third circuit module, which also provides a mounting platform for various electronic components (such as capacitors, resistors, chips, etc.) to ensure the stability of these components during operation.

[0084] The second and third circuit modules are positioned on opposite sides of the heat dissipation structure 13, with their thickness direction aligned with the thickness direction of the housing 11. This arrangement allows the larger surfaces of both the second and third circuit modules to be close to the heat dissipation structure 13 and to exchange heat with it, ensuring efficient heat transfer from the second and third circuit modules to the heat dissipation structure 13. Simultaneously, this makes the internal structure of the control box 100 more compact and saves space.

[0085] Specifically, please refer to Figure 3 , Figure 4 and Figure 5 The heat dissipation structure 13 is provided with a first opening 134, which can be located in the middle part of the heat dissipation structure 13. The electrical control box 100 also includes a power connection structure, which can be a conductive post, wire, or other conductive connector. The power connection structure passes through the first opening 134 and connects to the second circuit module and the third circuit module at its two ends, respectively, to electrically connect the first circuit module and the second circuit module. The first opening 134 and the power connection structure simplify the connection between circuits and reduce the complexity and length of internal wiring. Although the second circuit module and the third circuit module are electrically connected through the power connection structure, which reduces material costs and signal transmission losses and improves the efficiency and stability of the electrical connection, they still maintain a certain degree of physical isolation. This helps to maintain their respective working environments, such as temperature, vibration, and contamination.

[0086] By using the power connection structure and providing a first opening 134 on the heat dissipation structure 13, the connection between the second and third circuit modules can be completed inside the control box 100 without the need for external wiring. This reduces the need for external wiring between the second and third circuit modules, making the overall layout of the control box 100 simpler. Furthermore, due to the reduction in external wiring, the number and size of the wiring holes in the box 11 can be reduced accordingly, which helps improve the overall sealing of the control box 100, thereby better protecting the internal circuit modules from the intrusion of dust, moisture, and other contaminants.

[0087] In some embodiments, the electrical connection structure includes an insulating base and an electrical connection post. The insulating base is installed at the first opening 134. Multiple slots are spaced apart on the inner wall of the first opening 134. The insulating base includes a snap-fit ​​part that matches the slot. By snapping the snap-fit ​​part into the slot, the insulating base is securely installed at the first opening 134 of the heat dissipation structure 13. In other embodiments, the insulating base can also be installed at the first opening 134 by riveting, bonding, or other methods. The insulating base provides insulation, preventing current leakage or short circuits and ensuring electrical safety. The electrical connection post is mounted on the insulating base. The electrical connection post can be fixed to the insulating base by crimping, or it can be connected to the insulating base by welding. Alternatively, the electrical connection post can be pre-embedded in the cavity by injection molding, so that it is connected to the insulating base as a whole during the molding process. In other words, the insulating base also provides fixation and support for the electrical connection post, maintaining the connection stability of the electrical connection post and preventing loosening due to vibration or other reasons. The power connector extends axially along the thickness direction of the main housing 11, passes through the first opening 134, and connects to the first circuit module and the second circuit module at its two ends respectively. The power connector is usually made of conductive material, such as copper or copper alloy, which can effectively conduct current, realize the transmission of electrical signals, and ensure the normal operation of the circuit. The power connector is arranged in a straight line along the thickness direction of the main housing 11, making full use of the isolation structure space between the cavities and avoiding interference of external wiring with the space of other components inside the housing 200.

[0088] The device has multiple electrical terminals arranged side by side along the left and right sides of the main box 11. All terminals are mounted on insulating bases. The multiple terminals can distribute the current and prevent individual terminals from overheating or being damaged due to excessive current, thereby extending the service life of the terminals.

[0089] Compared to external wiring solutions, this embodiment achieves integrated arrangement of inter-module connections through an internal power connection structure composed of insulating bases and power terminals. This internal wiring method has at least the following advantages: firstly, it simplifies the wiring process during assembly, as operators only need to complete the end connection of the power terminals to establish a circuit path; secondly, it eliminates the extra space required for external wiring, making the internal structure of the electrical control box 100 more compact.

[0090] Preferably, the insulating base includes a base body and a limiting part and a snap-fit ​​part respectively connected to the base body. The base body is the main body of the insulating base, used to support the grounding post. The grounding post passes through the base body and provides the basic structure for installing the limiting part and the snap-fit ​​part. The limiting part protrudes from the outer wall surface of the base body and is arranged circumferentially around the base body. The snap-fit ​​part and the limiting part are spaced apart along the depth direction of the first opening 134, that is, the limiting part is located on one side of the base body, while the snap-fit ​​part is closer to the other side of the base body than the limiting part. When the insulating base is installed in the first opening 134, the limiting part abuts against the end face connecting the first opening 134, and the limiting part can restrict the position of the insulating base in the depth direction of the first opening 134. This ensures that the insulating base is accurately positioned on the heat dissipation structure 13 and prevents the insulating base from shifting during installation.

[0091] In other embodiments, the heat dissipation structure 13 also has a recessed groove formed on the inner wall of the first opening 134. The latching part is engaged in the latching groove. The latching part is usually designed to have a certain degree of elasticity, so that it can be engaged in the latching groove of the heat dissipation structure 13 through elastic deformation. Multiple latching parts are provided, and the multiple latching parts are spaced apart along the outer circumference of the base, providing a more stable fixing force and preventing loosening caused by uneven local force. Moreover, the design of multiple latching parts improves the reliability of the overall structure. Even if one latching part fails due to external force or wear, the other latching parts can still keep the insulating base fixed.

[0092] Furthermore, the limiting part and the snap-fit ​​part cooperate to clamp the heat dissipation structure 13. Specifically, the limiting part restricts the position of the insulating seat on one side of the depth direction of the first opening 134, while the snap-fit ​​part snaps into the snap-fit ​​groove on the other side of the depth direction of the first opening 134, so that the limiting part and the snap-fit ​​part cooperate to clamp the wall in the depth direction of the first opening 134. This ensures that the insulating seat is accurately positioned and firmly fixed on the heat dissipation structure 13, and will not loosen even under vibration or impact.

[0093] In some embodiments, a guide protrusion is provided on one of the outer wall surface of the base portion and the inner wall surface of the first opening 134, while a guide groove is provided on the other of the outer wall surface of the base portion and the inner wall surface of the first opening 134. The guide groove extends along the insertion direction of the insulating base, and the guide protrusion is inserted into the guide groove. The cooperation between the guide protrusion and the guide groove can significantly improve the accuracy and efficiency of installation. The guide protrusion and the guide groove can smoothly guide the insulating base to be inserted into the first opening 134 of the heat dissipation structure 13 in the correct direction, ensuring the smooth progress of the installation process.

[0094] In this embodiment, a guide protrusion is provided on the base body and extends along the depth direction of the first opening 134. The depth direction of the first opening 134 is the same as the thickness direction of the main box 11. The guide protrusion is used to guide the insulating base to be correctly inserted into the first opening 134 of the heat dissipation structure 13 during installation. The wire protrusion can be provided between two adjacent snap-fit ​​parts. During installation, the guide protrusion of the insulating base is aligned with the guide groove of the heat dissipation structure 13 to ensure that the guide protrusion can be inserted smoothly. At the same time, the snap-fit ​​part is automatically aligned with the snap groove on the heat dissipation structure 13. The snap-fit ​​part is snapped into the snap groove through elastic deformation to complete the fixing of the insulating base.

[0095] The guide protrusion is located on one side of the base body along the height direction. This asymmetrical design gives the insulating base a clear directionality during installation. Operators can easily determine the correct installation direction of the insulating base by observing the position of the guide protrusion and guide groove, avoiding installation failures caused by incorrect orientation.

[0096] In the above description, the second circuit module is provided with a first power connection hole, and the third circuit module is provided with a second power connection hole. The two ends of the power connection post are respectively provided with a first connecting hole and a second connecting hole. The first connecting hole and the first power connection hole are electrically connected by a connector, which can be a bolt, nut, washer, or other conductive connector. In this embodiment, the connector is a bolt and a spring washer. During installation, the end of the power connection post with the first connecting hole abuts against the position of the second circuit module with the first power connection hole. Then, the connector is inserted into the first power connection hole of the second circuit module and the first connecting hole of the power connection post, and the electrical connection is achieved by tightening the bolt. The spring washer is placed between the second circuit module and the bolt to prevent the bolt from loosening and to provide a reliable electrical connection. The second connecting hole and the second power connection hole are electrically connected by the connector. The specific installation method can be the same as or similar to the above method, and will not be repeated here. By providing power connection holes on the second and third circuit modules and achieving electrical connection through the power connection post and connector, the connection between the circuit modules is ensured to be more stable. The use of the connector further enhances the reliability of the connection and reduces failures caused by poor contact.

[0097] To ensure the accurate and secure connection of the second and third circuit modules to the heat dissipation structure 13, in some embodiments, the heat dissipation structure 13 is further provided with a first support column and a second support column. The first support column is located in a first cavity, and the second support column is located in a second cavity. Specifically, the heat dissipation structure 13 includes a cold plate body, a first support column, and a second support column. The first support column is connected to one side of the cold plate body and extends towards the second circuit module, while the second support column is connected to the other side of the cold plate body and extends towards the third circuit module. The second circuit module is also provided with a first mounting hole, and the third circuit module is provided with a second mounting hole. Understandably, the first mounting hole and the first... The positions of the support columns are corresponding, and the positions of the second mounting holes are corresponding to the positions of the second support columns. The first support column connects to the first mounting hole to support the second circuit module, and the second support column connects to the second mounting hole to support the third circuit module. Screws or other fasteners can be tightened in the first and second mounting holes to form a tight connection with the first and second support columns. The first and second support columns provide additional support for the second and third circuit modules. The second and third circuit modules are effectively supported on the heat dissipation structure 13, which helps to maintain the flatness and stability of the second and third circuit modules, especially when carrying other electronic components or in high vibration environments.

[0098] The first and second support columns respectively lift the second and third circuit modules, maintaining an appropriate distance between them and the heat dissipation structure 13. This increases the airflow space between the second and third circuit modules and the heat dissipation structure 13, helping to improve heat dissipation efficiency. Furthermore, the first and second support columns can also serve as part of the heat conduction path. For example, if the first and second support columns are made of copper or aluminum alloy, they possess high thermal conductivity and good mechanical properties, helping to more effectively conduct the heat generated by the second and third circuit modules to the heat dissipation structure 13, thereby improving heat dissipation efficiency.

[0099] In some embodiments, the second circuit module is a driver board, which typically implements the main functions of the control box 100, such as control and driving. The third circuit module is a filter board, which is used to filter high-frequency noise in the power supply, smooth DC voltage, and suppress electromagnetic interference, that is, to filter the electrical signal, remove noise and interference, and ensure the purity of the electrical signal. The driver board typically integrates multiple functional circuits; for example, the insulated gate bipolar transistor (IGBT) commonly found in driver boards is a device with a high failure rate. Since the filter board generates more heat than the driver board, when the filter board is located on the back side, the airflow in the duct can more effectively carry away the corresponding heat, resulting in better heat dissipation efficiency.

[0100] The first circuit module specifically includes a main control power board and a main control board that are electrically connected. The main control power board is responsible for providing a stable power supply to the main control module. It can monitor and adjust parameters such as current, voltage, and power to ensure stable power output. The main control board is the control center of the electrical control box 100, responsible for directing and controlling the operation of various components. It can process and transmit control signals to achieve precise control of other components.

[0101] Understandably, the electrical control box 100 also includes electrical connection wires, which can be multi-strand copper wires or coaxial cables, possessing good conductivity and anti-interference performance. In this embodiment, the electrical connection wires include power supply wires and signal wires. Power supply wires typically carry a large current and are classified as high-voltage, while signal wires typically carry a small current and are classified as low-voltage. The power supply wires are connected to the main control power board to provide stable power to the main control module. The signal wires are connected to the main control board for transmitting control signals and data. The separate layout of the main control board and the main control power board allows the power supply wires and signal wires to be connected more directly to their respective target boards, reducing interference from the power supply wires to the signal wires, simplifying internal wiring, and reducing cable length and complexity. Furthermore, the power supply wires in the electrical connection wires extend from the driver board to the second cavity 112 and then to the first cavity 111 to electrically connect to the main control power board and the filter board, while the signal wires still extend from the second cavity 112 to the first cavity 111 to electrically connect to the main control board and the driver board.

[0102] Optionally, the partition wall 116 is provided with a wire-through hole for passing through and connecting an electrical connection wire, so that the electrical connection wire is electrically connected to the first circuit module. In the above, the power supply wire can extend from the second cavity 112 through the wire-through hole into the first cavity 111, and the signal wire can also extend from the second cavity 112 through the wire-through hole into the first cavity 111.

[0103] Furthermore, the electrical control box 100 also includes a second cover, which enhances the protection and heat dissipation of the second circuit module. Specifically, the second cover adopts a cover design adapted to the shape of the heat dissipation structure 13, but this application is not limited to the shape of the second cover. An inner cavity for accommodating the third circuit module is formed inside the cover. The size of this cavity is pre-planned according to the height of the electronic components of the third circuit module to avoid interference between the third circuit module and the inner wall of the cover. It should be noted that the second cover can be tightly fitted to the heat dissipation structure 13 by screw fixing, snap-fit ​​connection, or other fixing devices, so that the second cover is installed on the side of the heat dissipation structure 13 facing away from the box body 11, and its edge forms a secondary seal with the second plate 132 of the heat dissipation structure 13, ensuring that the second cavity 112 can maintain dustproof and waterproof performance even under complex vibration environments.

[0104] Thus, an independent closed chamber is formed between the second cover and the heat dissipation structure 13. Since the heat generation and heat dissipation requirements of the second circuit module and the third circuit module may be different, by placing them in independent chambers, customized designs can be made according to the specific heat dissipation requirements of the second circuit module and the third circuit module. This also effectively avoids heat cross-interference between the second circuit module and the third circuit module, ensuring that the second circuit module and the third circuit module each have a better matching heat dissipation settings, thereby improving the heat dissipation efficiency of the entire control box 100.

[0105] It should be explained that the third circuit module can be in close contact with the heat dissipation structure 13 through surface-mounted thermally conductive pads, allowing heat to be quickly dissipated directly through the heat dissipation structure 13. Simultaneously, it can guide airflow within the casing 200's air duct to flow over the outside of the second cover, further carrying away heat transferred from the third circuit module to the surface of the second cover through air convection – a combined heat dissipation pathway. Furthermore, the detachable second cover design (e.g., using quick-release clips) facilitates direct access for maintenance personnel to the third circuit module for component testing or replacement without disassembling the heat dissipation structure 13 or damaging the sealing system, significantly reducing maintenance time. This is particularly suitable for industrial HVAC equipment requiring frequent adjustments. The integrated design of the second cover and the heat dissipation structure 13, through optimized spatial layout and material performance matching, systematically solves the heat dissipation, protection, and maintenance problems of high-power modules, providing comprehensive protection for the long-term reliable operation of the electrical control box 100 in harsh environments such as high dust and strong vibration.

[0106] Understandably, multiple first and second support columns can be provided. Multiple first support columns can be spaced apart on the circumference of the second circuit module near the outer edge. If the third circuit module is a square plate structure, multiple second support columns can be provided at the four corners of the third circuit module. Multiple first and multiple second support columns can provide evenly distributed support force, improving the stability of supporting the second and third circuit modules.

[0107] In some embodiments, the first support column is further provided with a first positioning protrusion, and the second circuit module is further provided with a first positioning hole corresponding to the first positioning protrusion. During installation, the first positioning protrusion is inserted into the first positioning hole, ensuring the precise positioning of the second circuit module on the first support column, preventing the second circuit module from shifting on the first support column, and maintaining the relative position stability between the substrate and the heat dissipation structure 13. Furthermore, the position of the second circuit module is pre-positioned, reducing the difficulty of subsequently installing screws or other fasteners in the first mounting hole.

[0108] Specifically, the first support column includes a connecting sub-part and a positioning sub-part connected together. Both the connecting sub-part and the positioning sub-part are connected to the cold plate body and extend towards the second circuit module, with their axes parallel to each other. The end of the positioning sub-part facing away from the cold plate body has the aforementioned first positioning protrusion, which can pass through the first positioning hole. The end of the connecting sub-part facing away from the cold plate body abuts against the second circuit module and is connected to the first mounting hole by screws or other fasteners. In this embodiment, screws are used to lock the connecting sub-part and the second circuit module. The end of the connecting sub-part facing the second circuit module has a threaded hole. During assembly, the second circuit module is first placed on one side of the cold plate body, aligning the first positioning protrusion of the positioning sub-part with the first positioning hole of the second circuit module. The second circuit module is gently pressed down, allowing the first positioning protrusion to pass through the first positioning hole, achieving initial positioning of the second circuit module. Subsequently, the screw is passed through the threaded hole of the connecting sub-part and engages with the first mounting hole, and the screw is tightened to fix the second circuit module.

[0109] In some embodiments, the second support column is further provided with a second positioning protrusion, and the third circuit module is also provided with a second positioning hole corresponding to the second positioning protrusion, with the second positioning protrusion inserted into the second positioning hole. This design has a similar effect to the first positioning protrusion, enabling pre-positioning of the third circuit module and reducing the installation difficulty of locking the second support column and the third circuit module without requiring assistance from others. The specific structure of the second support column can be the same as or similar to that of the first support column; therefore, it will not be described in detail here.

[0110] As a preferred embodiment of this invention, such as Figure 3 As shown, the second cavity back wall 115 has a recessed notch 118 structure on the side near the first cavity 111. The notch 118 can be a rectangular groove or an elliptical groove, and its size is reserved with an appropriate margin according to the diameter of the central communication line harness. Further, the partition wall 116 is provided with a wire passage 1181. The shape and size of the wire passage 1181 are preferably adapted to the notch 118, and the wire passage 1181 is connected to the notch 118. Through the cooperation of the notch 118 and the wire passage 1181, it is ensured that when the first cover 121 is tightly closed to the box body 11, one end of the central communication line is connected to the first circuit module, and the other end of the central communication line passes through the wire passage 1181 and the notch 118 in sequence and extends to the outside of the first cavity 111. The notch 118 structure provides a clear guiding path for the central communication line, so that the central communication line can be neatly and orderly led out from the inside of the first cavity 111. In addition, the location of the notch 118 is close to the inspection port, which allows maintenance personnel to directly access the main control line connector without opening the first box cover 121, quickly complete the line inspection or replacement, improve maintenance efficiency, and prevent the insulation layer of the central communication line from being damaged due to repeated bending, thus ensuring the electrical reliability and maintenance convenience of the HVAC equipment during long-term operation.

[0111] Based on the improved internal module layout and connection design of the electrical control box 100, its functionality and heat dissipation performance have been further expanded. For details, please refer to... Figures 2 to 5 As shown, the control box 100 also integrates a power connector for connecting an external power cord. The power connector provides a connection point between the external power cord and the internal circuitry of the control box 100, enabling the control box 100 to receive external power. The heat dissipation structure 13 extends in a cantilevered manner from the peripheral wall 113 of the box 11 on the side away from the first cavity 111. A heat exchange section 135 is provided on the portion of the heat dissipation structure 13 extending from the box 11, and the power connector is located on the heat exchange section 135. That is, the control box 100 has a length direction, which is vertically oriented. The first circuit module, the second circuit module, and the power connector are arranged sequentially along the length direction. In this case, the power connector is located below the second circuit module, effectively preventing interference between the power cord and other circuit modules. For ease of connection to the external power cord, the power connector is located at the bottom outer side of the box 11. This layout effectively avoids electromagnetic interference between the power cord and other circuit modules, improving the stability and reliability of signal transmission.

[0112] Meanwhile, this vertically separated layout ensures that the high-voltage wiring of the power cord will not interfere with the signal of the first and second circuit modules located above, guaranteeing the stability of the first and second circuit modules. This, in turn, ensures the normal operation of the control and communication functions of the entire electrical control box 100, improving the system's reliability and stability. Furthermore, the separation of power and communication lines vertically makes power connection operations more convenient. When connecting power and communication lines, operators can more clearly identify and distinguish between the two types of lines; they are not mixed together, reducing the possibility of wiring errors, improving wiring efficiency, and facilitating subsequent maintenance and repair work.

[0113] The power connector incorporates a heat dissipation structure 13 and is electrically connected to the filtering components in the third circuit module. This ensures that after an external power cable is connected, the power signal first undergoes filtering processing by the third circuit module, such as removing high-frequency noise and suppressing harmonics, before being transmitted to other circuit modules. This layout reduces the length of the power cable within the control box 100, preventing interference during power signal transmission. The power connector provides a stable power input, and centralized management of the power cables through the connector makes the connections more standardized, reducing tangled power cables and improving the overall neatness of the control box 100.

[0114] It should be noted that the power terminal block is also positioned facing the access panel, making wiring and maintenance operations more convenient for maintenance personnel. Maintenance personnel can directly access the power terminal block from the access panel without needing to reach inside the control box 100 or operate away from the access panel, thus reducing operational difficulty and time. When a power cord fault occurs, the power terminal block facing the access panel allows maintenance personnel to quickly locate the problem, facilitating timely troubleshooting and repair, and minimizing equipment downtime.

[0115] It should also be noted that, in this embodiment, the power terminal block includes an insulating base and conductive posts. The insulating base is connected to the heat dissipation structure 13. The main function of the insulating base is to provide electrical insulation and prevent current from flowing accidentally between different conductive parts, thereby ensuring the safety and reliability of the power terminal block. The conductive posts pass through the insulating base, that is, the insulating base also plays the role of supporting and fixing the conductive posts, ensuring the stable installation of the conductive posts.

[0116] Furthermore, please combine Figures 2 to 5 As shown, the heat exchange section 135 of the heat dissipation structure 13 has pre-drilled through holes adapted to the conductive posts. Insulating bushings are embedded in these through holes to prevent leakage. The conductive posts extend along the thickness direction of the housing 11 and pass through the through holes of the heat dissipation structure 13 before being directly soldered to the corresponding positions on the third circuit module, achieving electrical connection with the filter components in the third circuit module. This method provides a stable connection, capable of withstanding certain vibrations and shocks, ensuring the stability of power signal transmission.

[0117] The insulating base can be made of polycarbonate (PC), which has good insulation properties and mechanical strength. The conductive posts can be made of copper alloy, which has good electrical conductivity.

[0118] When the external power cord is connected to the power connector, a large current flows through it. The Joule heat generated by the power connector and the conductive post can be directly conducted to the heat exchange section 135, where it exchanges heat. This design incorporates the heat source of the power connector into the overall heat dissipation system of the control box 100, avoiding problems such as aging of the insulation base or poor contact due to overheating. At the same time, the cantilever structure of the heat exchange section 135 fully exposes it to the airflow in the duct, enhancing the convective heat dissipation effect. This avoids thermal interference from the power cord and power connector to adjacent circuit modules, ensuring the stable operation of the first and second circuit modules and improving the electrical safety and system reliability of the HVAC equipment under high load conditions.

[0119] To further enhance electrical safety, the electrical control box 100 is also equipped with a power protection cover, which forms a power protection cavity to accommodate the power terminal block. This power protection cover is attached to the outside of the heat exchange section 135, i.e., the bottom of the outer side of the box body 11, via a snap-lock or screw connection. A rubber sealing strip is embedded in the gap between its edge and the heat exchange section 135, effectively preventing dust, water droplets, or small animals from entering and touching the live parts, in conjunction with the overall sealing design of the heat dissipation structure 13. The power protection cover is made of insulating and flame-retardant polycarbonate material, and a conductive coating is sprayed on the inside to form an electromagnetic shielding layer.

[0120] This design not only prevents accidental electric shocks from external personnel touching the power connector, but also suppresses electromagnetic radiation from the high current at the terminals that could interfere with nearby circuit modules. Furthermore, the detachable design of the power protection cover, combined with the location of the access port on the housing 200, allows maintenance personnel to quickly open the cover and directly operate the power connector without tools. The integrated design of this power protection cover and the heat exchange unit 135 systematically solves the problems of safety protection, electromagnetic compatibility, and ease of maintenance at the power connection points. It is particularly suitable for scenarios in industrial HVAC equipment where frequent start-stop cycles cause large current fluctuations, providing comprehensive safety assurance for the long-term reliable operation of the control box 100 in complex environments.

[0121] Of course, the electrical control box 100 also includes a compressor connector. The second circuit module adds a compressor connector as a key electrical interface and serves as a hub connecting the electrical control box 100 and the compressor, ensuring that the compressor can operate normally according to system requirements. Specifically, a first wiring port 1191 is provided on the back wall 115 of the second cavity. The diameter of the port is customized according to the size of the compressor connector, allowing the compressor connector to pass through the first wiring port 1191 and connect electrically to the second circuit module. This layout optimizes the wiring path, reduces wiring length, avoids messy wiring, and reduces line impedance and heat loss during high current transmission.

[0122] In addition, the electrical control box 100 also includes a fan connector, with the second circuit module adding a fan connector as another key electrical interface. A second wiring port 1192 is provided on the back wall 115 of the second cavity, its diameter customized according to the size of the fan connector, allowing the fan connector to pass through the second wiring port 1192 and connect electrically to the second circuit module, ensuring the fan can operate normally according to system requirements. This layout optimizes the wiring path, reduces wiring length, avoids messy wiring, and reduces line impedance and heat loss during high current transmission. At this time, both the first wiring port 1191 and the second wiring port 1192 face the maintenance port, meaning both are directly facing the user, facilitating wiring of the fan and compressor.

[0123] Further, please refer to Figure 2 and Figure 3 The electrical control box 100 also includes a wiring sealing cover, the inner side of which has a sealing groove with a depth adapted to the height of the compressor connector or the fan connector. The wiring sealing cover ensures that both the compressor connector and the fan connector can be completely accommodated in the groove. Of course, the wiring sealing cover can also cover other parts of the back wall 115 of the second cavity to accommodate other components. In the thickness direction of the box body 11, the back wall 115 of the second cavity has a positioning rib 110 protruding from the side opposite to the first cavity 111. Its height can match the depth of the sealing groove, and the surface is processed with anti-slip texture to enhance the friction with the sealing cover. When the wiring sealing cover is placed on the back wall 115 of the second cavity, the positioning rib 110 is precisely embedded in the sealing groove, so that the wiring sealing cover is fitted on the outside of the positioning rib 110 through interference fit. At the same time, the inner wall surface of the wiring sealing cover tightly abuts the circumferential surface of the positioning rib 110 through elastic deformation, thereby effectively preventing rainwater and other substances from entering the second cavity 112 from the gap of the first wiring port 1191. The positioning rib 110 not only provides a precise installation reference for the wiring seal cover, preventing seal failure due to human error and thus improving the protection level, but also features a flange structure on the outer side of the seal cover for easy finger gripping, allowing for quick disassembly and assembly without tools. Combined with the access port design, this enables maintenance personnel to quickly check the sealing status of the first wiring port 1191 or clean the connector, significantly improving on-site maintenance efficiency. This combination of the wiring seal cover and positioning rib 110 systematically solves the sealing problem of the traditional first wiring port 1191 in high humidity and dusty environments. It is particularly suitable for outdoor-installed HVAC equipment control boxes 100, providing all-weather protection for the electrical connections of critical components such as compressors, effectively reducing the equipment failure rate caused by environmental factors.

[0124] The above is an explanation of the electrical control box 100 proposed in the embodiments of this application. Since the HVAC equipment proposed in the embodiments of this application adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be repeated here.

[0125] 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.

[0126] 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: The box body is provided with a first cavity and a second cavity that are independent of each other. Both the first cavity and the second cavity have openings, and the opening of the first cavity faces the opposite direction to the opening of the second cavity. The first circuit module is located within the first cavity; The second circuit module is electrically connected to the first circuit module and is disposed in the second cavity; A first lid is connected to the box body and covers the opening of the first cavity to seal the first cavity; as well as A heat dissipation structure is connected to the housing and covers the opening of the second cavity to seal the second cavity.

2. The electrical control box as described in claim 1, characterized in that, The housing includes: Peripheral sidewalls; First cavity back wall; The second cavity back wall, and the first cavity back wall, are disposed on two opposite sides of the peripheral side wall; and, A partition wall is disposed within the space enclosed by the peripheral sidewalls, and the first cavity back wall, the partition wall, and the peripheral sidewalls constitute the first cavity, while the second cavity back wall, the peripheral sidewalls, and the partition wall constitute the second cavity.

3. The electrical control box as described in claim 2, characterized in that, The second cavity back wall is provided with a first wiring port, and the electrical control box further includes: The compressor connector passes through the first wiring port and is electrically connected to the second circuit module.

4. The electrical control box as described in claim 3, characterized in that, The second cavity back wall is provided with a second wiring port, and the electrical control box further includes: The fan connector is threaded through the second wiring port and electrically connected to the second circuit module.

5. The electrical control box as described in claim 4, characterized in that, The second cavity back wall has a positioning rib protruding on the side opposite to the first cavity, and the electrical control box also includes: A wiring sealing cover is sleeved on the outside of the positioning rib, and the inner wall surface of the wiring sealing cover abuts against the circumferential surface of the positioning rib.

6. The electrical control box as described in claim 2, characterized in that, The second cavity back wall has a notch on the side close to the first cavity, and the notch connects to the first cavity. When the first box cover is closed on the box, the communication line connected to the first circuit module can pass through the notch and extend out of the first cavity.

7. The electrical control box as described in claim 6, characterized in that, The partition wall is provided with a wire passage, which is connected to the notch, so that the central communication line electrically connected to the first circuit module can pass through the wire passage and the notch in sequence and extend out of the first cavity.

8. The electrical control box as described in any one of claims 1 to 7, characterized in that, Also includes: Power connector; The heat dissipation structure extends out of the box body from the side away from the first cavity, and the portion of the heat dissipation structure extending out of the box body is provided with an electrical heat exchange section. The power supply terminal is located in the electrical heat exchange section and exchanges heat with the electrical heat exchange section.

9. The electrical control box as described in claim 8, characterized in that, Also includes: The power protection cover has a power protection cavity for accommodating the power terminal block, located on one side of the box body, and covers the power-connecting heat exchange part.

10. The electrical control box as described in claim 8, characterized in that, Also includes: The third circuit module is placed on opposite sides of the heat dissipation structure, and exchanges heat with the heat dissipation structure. The power terminal block passes through the heat dissipation structure and is electrically connected to the third circuit module. and The second cover has a second cover cavity for accommodating the third circuit module. It is located on the side of the heat dissipation structure facing away from the box body and covers the heat dissipation structure.

11. The electrical control box as described in claim 10, characterized in that, The second circuit module is a driver board, the third circuit module is a filter board, the first circuit module includes a main control power board and a main control board that are electrically connected, and the control box further includes: The electrical connection includes a power supply line and a signal line. The power supply line is used to electrically connect the main control power board and the filter board, and the signal line is used to electrically connect the main control board and the driver board.

12. The electrical control box as described in claim 1, characterized in that, The first box lid has a first hinge portion, and the box body is provided with a second hinge portion, wherein the first hinge portion and the second hinge portion are hinged together.

13. The electrical control box as described in claim 1, characterized in that, The heat dissipation structure includes a heat dissipation plate, which has heat dissipation channels for supplying heat exchange medium.

14. The electrical control box as described in claim 13, characterized in that, The heat sink includes a first plate and a second plate, wherein at least one of the first plate and the second plate is provided with a flow channel groove, and the other of the first plate and the second plate covers the flow channel groove to form a heat dissipation flow channel. Alternatively, the heat sink may include a first plate, a second plate, and a flow channel, wherein the flow channel is confined between the first plate and the second plate, and the heat dissipation flow channel is provided inside the flow channel.

15. The electrical control box as described in claim 14, characterized in that, Within the projection range of the second cavity in the first direction A, the heat dissipation channel extends in a meandering manner along the second direction B. The first direction A is perpendicular to the first plate, and the first direction A and the second direction B are perpendicular to each other.

16. 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 15, wherein the electrical control box is disposed within the housing.

17. The HVAC equipment as described in claim 16, characterized in that, The housing is provided with an access port, and the electrical control box is located at the access port; The first cavity is positioned facing the inspection port.

Images