Electric control box and heating device

Abstract

The application discloses an electric control box and a heating and ventilation device. The electric control box comprises a main box body, a main control module, a variable frequency drive module and a power supply wiring seat. The first cavity and the second cavity are arranged in the main box body, and the first cavity and the second cavity are arranged at intervals. The main box body is provided with a wire passing groove between the first cavity and the second cavity. The main control module is arranged in the second cavity, and the communication line connected with the main control module extends into the second cavity through the wire passing groove. The variable frequency drive module is arranged in the first cavity and electrically connected with the main control module. The power supply wiring seat is used for connecting an external power supply line, and is mounted on the main box body and electrically connected with the variable frequency drive module. The power supply wiring seat and the wire passing groove are respectively arranged on different sides of the first cavity. The application separates the power supply line and the communication line, avoids the interference of the strong current of the power supply line on the weak current signal of the communication line, and ensures the stability and reliability of the communication signal.

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 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 usually assembled and protected in a single enclosure. The power lines and communication lines are concentrated on the same side or in close proximity to the enclosure. This results in the high-voltage power lines being close to the low-voltage communication lines, which can easily generate electromagnetic interference, affecting the signal transmission stability of the main control module and consequently reducing the control accuracy and reliability of the electrical control box. Summary of the Invention

[0004] This application provides an electrical control box and HVAC equipment, which can improve the reliability of the electrical control box.

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

[0006] The main box body has a second cavity and a first cavity inside, the first cavity and the second cavity are spaced apart, and the main box body has a wire groove between the second cavity and the first cavity;

[0007] The main control module is disposed in the second cavity, and the communication line connected to the main control module extends into the second cavity through the cable tray;

[0008] The variable frequency drive module is disposed within the first cavity and is electrically connected to the main control module; and

[0009] A power connector is used to connect an external power cord. The power connector is installed in the main housing and electrically connected to the frequency converter drive module. The power connector and the cable tray are located on different sides of the first cavity.

[0010] In some embodiments, the power terminal block is located on the side of the first cavity away from the second cavity, and is disposed on opposite sides of the first cavity opposite to the wire guide groove.

[0011] In some embodiments, the main housing has a length direction, and the main control module, the frequency converter drive module, and the power terminal are arranged sequentially along the length direction.

[0012] In some embodiments, a central module and a central housing are also included. The central housing is independently disposed from the main housing. The central module is located in the central housing. The communication line includes a central communication line, which is connected to the central module. The central communication line is electrically connected to the central interface on the main control module via the cable tray.

[0013] In some embodiments, the cable tray extends through opposite sides of the main housing along its extension direction to form a first cable tray opening and a second cable tray opening;

[0014] The communication line also includes a peripheral communication line corresponding to an external device. The peripheral communication line enters the cable tray via the first cable port and is electrically connected to the peripheral interface on the main control module. The central communication line enters the cable tray via the second cable port and is electrically connected to the central interface.

[0015] In some embodiments, the main housing includes a lid and a heat dissipation structure, the lid and the heat dissipation structure being sealed together to form the first cavity and the second cavity.

[0016] In some embodiments, the first cavity includes a first sub-cavity and a second sub-cavity arranged at intervals along the thickness direction of the main housing, and the first sub-cavity and the second cavity are located on the same side of the heat dissipation structure;

[0017] The frequency conversion drive module includes a drive board and a filter board. The drive board is disposed in the first sub-cavity, and the filter board is disposed in the second sub-cavity. The power terminal extends into the second sub-cavity and is electrically connected to the filter board.

[0018] In some embodiments, the heat dissipation structure is provided with a mounting port communicating with the second sub-cavity. The mounting port is located below the first sub-cavity, and the power terminal is installed at the mounting port and partially exposed on the side of the heat dissipation structure facing away from the second sub-cavity.

[0019] In some embodiments, the projections of the first sub-cavity and the second sub-cavity along the thickness direction of the main housing overlap, the first sub-cavity has a first edge disposed away from the second cavity, and the second sub-cavity has a second edge disposed away from the second cavity, the second edge being disposed further away from the second cavity than the first edge;

[0020] The mounting port is located between the first edge and the second edge.

[0021] In some embodiments, the power connector includes an insulating base and a conductive post. The insulating base is connected to the heat dissipation structure and seals the mounting port. The conductive post passes through the insulating base, with one end extending into the second sub-cavity and connected to the filter plate, and the other end of the conductive post exposed on the surface of the insulating base facing away from the second sub-cavity.

[0022] In some embodiments, the insulating base includes an insulating body and a connecting flange protruding from the outer wall of the insulating body, the insulating body portion extending into the second sub-cavity, and the conductive post passing through the insulating body;

[0023] The heat dissipation structure has a limiting groove surrounding the mounting port on one side of the second sub-cavity. The connecting flange is embedded in the limiting groove and connected to the heat dissipation structure.

[0024] In some embodiments, the heat dissipation structure includes a cold plate body, a first enclosure plate, and a second enclosure plate that are integrally formed. The cold plate body is plate-shaped and has heat dissipation channels. The box cover includes a first box cover, a second box cover, and a third box cover. The cold plate body includes a first side and a second side.

[0025] The first box cover and the second box cover are respectively disposed on the first side and the second side of the cold plate body. The first box cover, the first enclosure plate and the first side of the cold plate body cooperate to form the first sub-cavity. The second box cover cooperates with the second side of the cold plate body to form the second sub-cavity. The third box cover cooperates with the second enclosure plate and the first side of the cold plate body to form the second cavity.

[0026] In some embodiments, a main control connection line and a cable bridge are also included. The main control connection line extends from the first cavity to the second cavity to electrically connect the main control module and the frequency converter drive module. The cable bridge is disposed in the first sub-cavity, and a portion of the main control connection line is arranged on the cable bridge.

[0027] In some embodiments, the cable bridge has a first cable routing channel and a second cable routing channel that are relatively independently configured; the main control connection line includes a power supply line and a signal line, wherein the portion of the power supply line located in the first sub-cavity is arranged in the first cable routing channel, and the portion of the signal line located in the first sub-cavity is arranged in the second cable routing channel.

[0028] In some embodiments, the main control module includes a main control power board and a main control board that are electrically connected. The main control board is located on the side of the main control power board facing the third cover. The main control connection line includes a power supply line and a signal line. The power supply line is connected to the main control power board, and the signal line is connected to the main control board.

[0029] In some embodiments, the cold plate body is provided with a second opening, the second opening connecting the first sub-cavity and the second sub-cavity, and located on the side of the second sub-cavity closer to the second cavity body;

[0030] The electrical control box also includes a main control connection line, and the main control module includes a main control power board and a main control board that are electrically connected; wherein, the power supply line in the main control connection line enters the first sub-cavity through the second opening from the second sub-cavity, and then extends into the second cavity to electrically connect the main control power board and the filter board, and the signal line in the main control connection line extends into the second cavity through the first sub-cavity to electrically connect the main control board and the drive board.

[0031] In some embodiments, a third enclosure is formed on the second side of the cold plate body, and the second cover is fitted onto the third enclosure to form the second sub-cavity.

[0032] In some embodiments, the drive board is provided with a fan interface and a compressor interface, and the first enclosure is provided with a fan wiring section and a compressor wiring section. The fan wiring section is provided with a wiring interface, which is electrically connected to the fan interface via a wire. The compressor wiring section is used for the compressor wire to pass through, and the compressor wire is also electrically connected to the compressor interface on the drive board.

[0033] In some embodiments, the fan wiring section and the compressor wiring section are disposed on at least one side of the wall on opposite sides of the first enclosure.

[0034] In some embodiments, two drive boards are laid flat in the first sub-cavity, and the two drive boards are centrally symmetrically arranged, and the main box body has a width direction;

[0035] The fan wiring section and compressor wiring section corresponding to one of the drive plates are located on one side wall of the first enclosure along the width direction, and the fan wiring section and compressor wiring section corresponding to the other drive plate are located on the other side wall of the first enclosure along the width direction.

[0036] In some embodiments, a first seal is also included, wherein the inner wall surface of the first enclosure forms a mating inner circumferential surface;

[0037] The first sealing element is disposed on the first box cover and presses against the inner peripheral surface of the mating joint.

[0038] In some embodiments, the first lid includes a lid body and a lid flange connected together;

[0039] The cover body is used to form part of the cavity wall of the first sub-cavity, and the cover body is in contact with the first enclosure plate, and the cover plate flange is located inside the first sub-cavity;

[0040] The first sealing element is installed on the flange of the cover plate and presses against the inner circumferential surface of the mating joint.

[0041] In some embodiments, the first seal includes a sealing body and a sealing lip;

[0042] The sealing body is installed on the flange of the cover plate, and the sealing lip is located on the side of the sealing body facing the inner circumferential surface of the mating joint, and the sealing lip abuts against the inner circumferential surface of the mating joint.

[0043] In some embodiments, the sealing lip extends obliquely from the sealing body toward the side where the cover body is located.

[0044] In some embodiments, a terminal block protective housing is also included, which is connected to the heat dissipation structure and located on the side of the first sub-cavity away from the second cavity;

[0045] The terminal block protective shell is provided with a protective cavity and a clearance opening communicating with the protective cavity. The part of the power terminal block exposed outside the main box extends into the protective cavity through the clearance opening.

[0046] In some embodiments, the bottom of the terminal block housing is provided with a power cord outlet.

[0047] Secondly, embodiments of this application provide a heating, ventilation, and air conditioning (HVAC) device, including a housing and an electrical control box as described in any of the above claims, wherein the electrical control box is disposed within the housing.

[0048] In some embodiments, the housing is further provided with an access port; the electrical control box is located at the access port, wherein the power terminal block is disposed facing the access port.

[0049] In some embodiments, the HVAC equipment includes a switching valve disposed within a housing, and a central housing in the electrical control box is mounted on the switching valve.

[0050] In some embodiments, the central housing is located on the rear side of the main housing opposite to the access port.

[0051] In some embodiments, the housing includes an outer shell and a chassis disposed at the bottom of the outer shell, the chassis having a wire pass-through opening facing upward;

[0052] The main box is located above the wiring port, and the power cord outlet on the electrical control box is positioned opposite the wiring port in the vertical direction.

[0053] In this embodiment, a cable tray is provided between the first and second cavities of the main housing. This cable tray connects to the outside, and the communication cable connected to the main control module extends into the second cavity via the cable tray. In other words, the cable tray provides a channel for the communication cable to enter the second cavity from the outside, allowing it to connect smoothly to the main control module and ensuring communication between the main control module and external devices. The power connector is used to connect an external power cord to provide power to the control box. The power connector is installed in the main housing and electrically connected to the frequency converter drive module, allowing external power to be transmitted to the frequency converter drive module, providing power support for its normal operation.

[0054] The power connector is located on the side of the first cavity furthest from the second cavity, and is positioned opposite the cable tray on opposite sides of the frequency converter drive module, making the paths of power and communication cables within the control box clearer. This layout avoids crossings between power and communication cables, reduces electromagnetic interference, and improves the stability and reliability of signal transmission. Furthermore, the relative arrangement of the power connector and cable tray makes the internal wiring zones of the control box more clearly defined. When maintenance or repair is required, technicians can quickly locate the power connector and cable tray, reducing the time spent searching for wiring and improving maintenance efficiency.

[0055] Furthermore, the power supply terminal block and the cable tray are located on different sides of the frequency converter drive module, which helps to separate the power supply line and the communication line, avoids the strong current of the power supply line from interfering with the weak current signal of the communication line, and ensures the stability and reliability of the communication signal. Attached Figure Description

[0056] 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.

[0057] Figure 1 This is a schematic diagram of the structure of a heating, ventilation, and air conditioning (HVAC) device according to an embodiment of this application;

[0058] Figure 2 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.

[0059] Figure 3 for Figure 2 A structural diagram from another angle of the structure;

[0060] Figure 4 This is a schematic diagram of the structure of an electrical control box according to an embodiment of this application (the central control box is omitted);

[0061] Figure 5 This is a schematic diagram of the electrical control box from another angle according to an embodiment of this application (the central housing is omitted);

[0062] Figure 6 for Figure 4 A schematic diagram of the exploded structure of the electrical control box (the central control box is omitted);

[0063] Figure 7 for Figure 6 A structural diagram of the structure from another angle (the central box is omitted);

[0064] Figure 8 This is a schematic diagram of a heat dissipation structure according to an embodiment of this application;

[0065] Figure 9 for Figure 8 A magnified view of a section at point A in the middle;

[0066] Figure 10 for Figure 8 A magnified view of a section at point B in the middle;

[0067] Figure 11 This is a schematic diagram of the power connection structure according to an embodiment of this application;

[0068] Figure 12 for Figure 11 A structural diagram from another angle of the structure;

[0069] Figure 13 This is an exploded view of a portion of the structure of the electrical control box according to an embodiment of this application;

[0070] Figure 14 for Figure 13 A schematic diagram of the structure from another perspective;

[0071] Figure 15 This is a cross-sectional schematic diagram of a portion of the structure of the electrical control box in this application;

[0072] Figure 16 This is a schematic diagram of the assembly structure of the power terminal block, terminal block protective shell, and cable outlet structure according to an embodiment of this application;

[0073] Figure 17 for Figure 16 A schematic diagram of the exploded structure in the image;

[0074] Figure 18 for Figure 17 A structural diagram of the structure from another perspective;

[0075] Figure 19 This is a further exploded structural diagram of a portion of the electrical control box in this application;

[0076] Figure 20 This is a side view of a portion of the electrical control box structure of this application;

[0077] Figure 21 for Figure 20 A sectional view along the CC line;

[0078] Figure 22 for Figure 21 A magnified view of a section at point D;

[0079] Figure 23 This is another exploded structural diagram of a portion of the electrical control box in this application;

[0080] Figure 24 This is a further exploded structural diagram of a portion of the electrical control box in this application;

[0081] Figure 25 This is a schematic diagram of the structure of the second sealing element according to an embodiment of this application;

[0082] Figure 26 This is a schematic diagram of the structure of a cross-bridge according to an embodiment of this application;

[0083] Figure 27 for Figure 8 A schematic diagram of the heat dissipation structure from another angle;

[0084] Figure 28 This is an exploded view of a portion of the structure of the electrical control box according to an embodiment of this application;

[0085] Figure 29 This is a schematic diagram of the structure of the electrical control box according to an embodiment of this application after removing the cover.

[0086] Explanation of icon numbers:

[0087] 100. Electrical control box; 10. Main box body; 10a. First cavity; 10a1. First sub-cavity; 10a11. First edge; 10a2. Second sub-cavity; 10a21. Second edge; 10b. Second cavity; 10c. Wiring groove; 10c1. First wiring port; 10c2. Second wiring port; 10d. First opening; 10d1. Clip; 10d2. Guide groove; 11. Heat dissipation structure; 11a. Mounting port; 11b. Limiting groove; 111. Cold plate body; 111a. Blocking groove; 1111. Cold plate substrate; 1112. Flow channel; 1113. Heat dissipation boss; 1113a. Heat-conducting surface; 112. First enclosure; 112a. Butt joint inner circumferential surface; 1121. Enclosure body; 1122. Enclosure flange ; 113. Second enclosure panel; 113a. First notch; 114. Mounting boss; 115. First support column; 1151. Connecting sub-part; 1152. Positioning sub-part; 1152a. First positioning protrusion; 116. Second support column; 1161. Second positioning protrusion; 117. Third support column; 118. Limiting protrusion; 119. Foolproof protrusion; 120. Flow channel connector; 120A. Mounting plate; 12. Box cover; 121. First box cover; 1211. Cover body; 1211a. Cover body part; 1211b. Flanged part; 1212. Cover plate flange; 1212a. Extension part; 1212b. Stop part; 122. Second box cover; 122a. Sealing groove; 1221. First connecting ear; 123. Third 20. Box cover; 21. Variable frequency drive module; 22. Drive board; 211. First substrate; 211a. First power connection hole; 211b. First mounting hole; 211c. First positioning hole; 22. Filter board; 221. Second substrate; 221a. Second power connection hole; 221b. Second mounting hole; 221c. Second positioning hole; 222. Common mode inductor; 30. Main control module; 31. Main control board; 32. Main control power board; 50. Cable bridge; 51. First bracket; 51a. First wiring channel; 52. Second bracket; 52a. Second wiring channel; 521. Wiring section; 522. Elastic buckle; 523. Wire clamping section; 60. Central housing; 70. Power terminal block; 70a. Sealing groove; 71. Insulating base; 711. Insulating body; 712, connecting flange; 712a, anti-fool hole; 72, conductive post; 91, fan wiring part; 92, compressor wiring part; 80, terminal block protective shell; 80a, protective cavity; 80b, clearance opening; 80c, power cord outlet; 81, first protective half shell; 82, second protective half shell; 94, cable outlet structure; 94a, cable outlet cavity; 941, first cable outlet seat; 9411, first cavity wall; 9411a, cable outlet notch; 942, second cable outlet seat; 9421, second cavity wall; 95, power connection structure; 951, insulating seat; 9511, seat body part; 9511a, guide protrusion; 9512, limiting part; 9513, snap-fit ​​part; 952, power connection post; 952a, 952a, first connecting hole;952b, Second connecting hole; 97, First seal; 971, Sealing body; 972, Sealing lip; 98, Second seal; 981, Sealing body; 981a, Slot; 982, Wiring passage; 982a, Wiring groove; 982b, Limiting hole; 991, Reactor; 992, First sealing ring; 993, Second sealing ring;

[0088] 2. Outdoor unit; 200. Casing; 200a. Inspection port; 210. Outer casing; 220. Chassis; 220a. Wiring port; 300. Air supply fan.

[0089] 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

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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 , Figure 2 and Figure 3 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, the outdoor unit 2 includes a blower fan 300.

[0096] 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.

[0097] 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.

[0098] like Figure 1 , Figure 2 and Figure 3 As shown, 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.

[0099] 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.

[0100] 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 300 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 of the electrical control box 100.

[0101] Please continue reading. Figure 1 , Figure 2 and Figure 3 In some embodiments, the housing 200 is provided with an access port 200a. In one configuration, the housing 200 includes a housing body and an access door rotatably connected to the housing body, allowing maintenance personnel to expose the access port 200a by opening the access door. 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 200a. This application does not impose specific limitations on the manner in which the access port 200a is exposed.

[0102] The electrical control box 100 is located at the access port 200a, allowing maintenance personnel to quickly access it without having to enter the housing 200 to operate it, thus greatly improving the efficiency of maintenance and repair.

[0103] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments, the electrical control box 100 includes a main box body 10 and a frequency converter drive module 20. The main box body 10 is the main structure of the electrical control box 100. A first cavity 10a is provided inside the main box body 10, and the frequency converter drive module 20 is disposed in the first cavity 10a. One of the main functions of the frequency converter drive module 20 is to perform frequency conversion processing on the power supply to meet the power frequency requirements of the compressor or fan and drive the compressor or fan to operate at the corresponding frequency. That is, the main box body 10 serves to support and protect the internal frequency converter drive module 20, preventing it from shifting or being damaged due to external vibration or collision during use. By setting the main box body 10, the frequency converter drive module 20 and other components are integrated into a unified structure, which is conducive to realizing the overall design and assembly of the electrical control box 100, and facilitates production and maintenance.

[0104] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, a second cavity 10b is also provided inside the main housing 10. The electrical control box 100 also includes a main control module 30 and a power terminal block 70. The main control module 30 is located inside the second cavity 10b and is the core control unit of the electrical control box 100. It is responsible for receiving and processing various signals and controlling and managing the operation of the entire electrical control box 100. The second cavity 10b is spaced apart from the first cavity 10a. The main control module 30 in the second cavity 10b and the frequency converter drive module 20 in the first cavity 10a can each perform their respective functions, reducing interference. The main housing 10 has a cable tray 10c between the second cavity 10b and the first cavity 10a. The cable tray 10c communicates with the outside, and the communication cable connected to the main control module 30 extends into the second cavity 10b through the cable tray 10c. In other words, the cable tray 10c provides a channel for the communication cable to enter the second cavity 10b from the outside, allowing the communication cable to be smoothly connected to the main control module 30, ensuring the communication function between the main control module 30 and devices outside the main housing 10. The power connector 70 is used to connect an external power cord to provide power to the control box 100. The power connector 70 is installed in the main housing 10 and electrically connected to the frequency converter drive module 20, allowing external power to be transmitted to the frequency converter drive module 20 through the power connector 70, providing power support for the normal operation of the frequency converter drive module 20.

[0105] The power connector 70 is located on the side of the first cavity 10a away from the second cavity 10b, and is positioned opposite the cable tray 10c on opposite sides of the first cavity 10a, making the paths of power cables and communication cables within the control box 100 clearer. This layout avoids crossing of power cables and communication cables, reduces electromagnetic interference, and improves the stability and reliability of signal transmission. Furthermore, the relative arrangement of the power connector 70 and the cable tray 10c makes the internal wiring zones of the control box 100 more clearly defined. When maintenance or repair is required, technicians can quickly locate the power connector 70 and the cable tray 10c, reducing the time spent searching for wiring and improving maintenance efficiency.

[0106] Furthermore, the power terminal block 70 and the cable tray 10c are located on different sides of the frequency converter drive module 20, which helps to separate the power line and the communication line, avoids the strong current of the power line from interfering with the weak current signal of the communication line, and ensures the stability and reliability of the communication signal.

[0107] Please continue reading. Figure 4 , Figure 5 , Figure 6 and Figure 7 Specifically, in one configuration, the first cavity 10a is spaced below the second cavity 10b, and the power terminal block 70 is located at the bottom of the main housing 10, opposite to the cable tray 10c on the upper and lower sides of the frequency converter drive module 20. Because the power cable is located at the bottom of the main housing 10, while the main control module 30 is located above, this vertical separation layout ensures that the high-voltage power cable connection will not interfere with the signal of the main control module 30 located above. The communication signal of the main control module 30 can remain stable, thereby ensuring the normal operation of the control and communication functions of the entire control box 100 and improving the reliability and stability of the system.

[0108] Furthermore, the power cord and communication cord are separated vertically, making power connection easier. When connecting the power cord and communication cord, operators can more clearly identify and distinguish between the two types of lines. The power cord and communication cord are not mixed together, reducing the possibility of wiring errors, improving wiring efficiency, and also facilitating subsequent maintenance and repair work.

[0109] In some embodiments, the power terminal block 70 is positioned facing the access port 200a, making it more convenient for maintenance personnel to perform wiring or maintenance operations. Maintenance personnel can directly access the power terminal block 70 from the access port 200a without needing to reach inside the electrical control box 100 or operate away from the access port 200a, thus reducing operational difficulty and time. When a power cord fault occurs, the power terminal block 70 facing the access port 200a allows maintenance personnel to quickly locate the problem, facilitating timely troubleshooting and repair, and reducing equipment downtime.

[0110] It should be noted that the side of the main housing 10 with the power terminal block 70 is defined as the front side of the control box 100, while the side facing away from the power terminal block 70 is defined as the rear side of the control box 100. The control box 100 can be vertically hung inside the housing 200 via a mounting plate on its back; alternatively, the housing 200 has a connecting bracket extending vertically, and the control box 100 has a length direction that extends along the connecting bracket and is connected to the bracket by screws. Furthermore, the cable tray 10c is located above the power terminal block 70; therefore, the side with the cable tray 10c is defined as the upper side of the control box 100, while the side with the power terminal block 70 is defined as the lower side of the control box 100. Further, from the perspective of a maintenance personnel facing the control box 100, the left and right sides of the control box 100 correspond to the left and right sides from which the maintenance personnel view the control box 100, respectively.

[0111] like Figure 3 As shown, in some embodiments, the electrical control box 100 further includes a central module and a central housing 60. The central module is responsible for handling specific control or communication tasks. The central housing 60 is independently configured from the main housing 10. The central module is located within the central housing 60, which provides installation space and protection for the central module, better protecting it from external environmental factors (such as dust and moisture). The independent configuration of the central housing 60 and the main housing 10 enables a modular design, making the assembly and maintenance of the electrical control box 100 more flexible and convenient. The positions of the central housing 60 and the main housing 10 can also be set according to actual needs. Furthermore, the independent configuration of the central housing 60 allows the central module to be replaced or upgraded according to different application requirements, improving the system's adaptability and flexibility. Due to the independence of the central module, maintenance and troubleshooting can be more centralized and efficient, reducing overall downtime.

[0112] The communication lines include a central communication line, which connects to the central module. The central communication line is electrically connected to the central interface on the main control module 30 via cable tray 10c, enabling data exchange and control signal transmission. This allows for centralized management of the communication lines, facilitating wiring and maintenance. It ensures efficient and stable communication between the central module and the main control module 30, which is particularly important for real-time control systems.

[0113] As mentioned above, the central housing 60 is independently configured from the main housing 10. In some embodiments, the central housing 60 may be located on the rear side of the main housing 10, away from the access port 200a. The central housing 60 typically contains important communication and / or control lines, and placing it on the rear side can prevent misoperation of these critical lines during maintenance. Furthermore, the high-voltage area (frequency converter drive module 20) and the low-voltage area (central module) are separated, which conforms to the principle of zoning management of electrical equipment and avoids electromagnetic interference between high-voltage and low-voltage lines.

[0114] As mentioned above, a switching valve is installed inside the casing 200. A switching valve is a valve used to control the flow direction of fluids (such as refrigerant, air, etc.). It switches the flow direction of the fluid by changing the position of the valve core, thereby achieving the switching of different operating modes. Specifically, the switching valve can be a four-way valve. The four-way valve achieves the switching between cooling and heating modes by switching the flow direction of the refrigerant. The central housing 60 can be connected to the switching valve via a bracket. Understandably, various sensors and electronic valve bodies are installed on the refrigerant piping connected to the switching valve. This application installs the central housing 60 near the switching valve, allowing it to be closer to the sensors and electronic valve bodies in the outdoor unit 2. This results in shorter wiring between the central housing 60 and the sensors and electronic valve bodies in the outdoor unit 2, simplifying the overall wiring of the unit.

[0115] Specifically, the central module, as one of the core control units of the electrical control box 100, connects to various key components to monitor and control the operating status of the entire HVAC system. Specifically, the central module can be connected to a four-way valve assembly, a one-way solenoid valve assembly, and an electronic expansion valve assembly for precise control of the refrigerant flow direction and flow rate. The four-way valve assembly controls the switching of refrigerant flow direction, enabling the conversion between cooling and heating modes; the one-way solenoid valve assembly controls the on / off state of the refrigerant, ensuring stable system operation under different operating conditions; and the electronic expansion valve assembly optimizes the system's cooling efficiency through precise adjustment of the refrigerant flow rate.

[0116] The central module is also connected to temperature and pressure sensor wiring harnesses for real-time monitoring of temperature and pressure changes in the system. The temperature sensor wiring harnesses transmit the monitored temperature signals to the central module, while the pressure sensor wiring harnesses transmit data on the monitored system pressure to prevent system failures caused by abnormal pressure. The central module has a built-in signal processing unit for real-time analysis of the analog signals collected by the temperature and pressure sensor wiring harnesses and conversion into digital signals for transmission to the main control module 30.

[0117] The central housing 60 includes a main body and two cable conduits connected to and communicating with the main housing. The central module is housed within the main housing. One cable conduit is positioned close to the main housing 10, through which the central communication line, temperature sensor cable group, and pressure sensor cable group are run. The other cable conduit, containing the four-way valve cable group, single-way solenoid valve cable group, and electronic expansion valve cable group, is run through the other cable conduit away from the main housing 10. This arrangement of different types of wiring within separate conduits makes the wiring clearer and more organized. During installation and maintenance, operators can more easily identify and handle various cables, reducing the possibility of cable crossings and confusion, improving maintenance efficiency, and lowering maintenance costs.

[0118] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments, the cable tray 10c extends through the opposite sides of the main housing 10 along its extension direction to form a first cable port 10c1 and a second cable port 10c2. The main control module 30 includes a main control circuit board and a peripheral interface. The main control circuit board is the core part of the main control module 30, responsible for processing data from different parts and responding to maintain the normal operation of the system. The peripheral interface is the interface for the main control module 30 to communicate and control external devices.

[0119] The communication lines also include peripheral communication lines corresponding to external devices. These peripheral communication lines enter the cable tray 10c via the first cable port 10c1 and are electrically connected to the peripheral interface on the main control module 30. Peripheral communication lines can include engineering communication lines, which mainly include indoor unit communication lines and other outdoor unit communication lines. By concentrating the peripheral communication lines on the left side of the main housing 10, while the central communication lines enter the cable tray 10c via the second cable port 10c2 and are electrically connected to the central interface, the central communication lines (typically used for communication between internal modules) are concentrated on the other side. This allows users to more intuitively identify and distinguish the wiring areas for different functions. This clear zoning reduces user confusion and the possibility of incorrect operation during wiring. When installing or maintaining the equipment, users only need to focus on the peripheral communication line interface on one side, without having to search for the correct interface in a complex wiring environment. This simplified design makes the wiring process more efficient, reduces operation time and difficulty, and clearly distinguishes between the user-operable area and the internal maintenance area.

[0120] Furthermore, by positioning the central interface closer to the second cable port 10c2 and the peripheral interface closer to the first cable port 10c1, the peripheral communication lines and the central communication lines extend along their respective independent paths within the cable tray 10c, avoiding cross-layouts. This layout effectively reduces electromagnetic interference between lines and improves the stability and reliability of signal transmission. It ensures that both peripheral and central communication lines can reach their corresponding interfaces via the shortest possible path after entering the cable tray 10c. This design reduces the length of the signal transmission path, lowers signal loss during transmission, and improves signal transmission efficiency.

[0121] In this embodiment, the cable tray 10c extends through the left and right sides of the main housing 10 to form a first cable port 10c1 located on the left and a second cable port 10c2 located on the right. The central interface is located to the right of the peripheral interface, concentrating the peripheral communication lines on the left side of the main housing 10. The central communication line enters the cable tray 10c through the second cable port 10c2 and is electrically connected to the central interface. That is, the central communication line (usually used for communication between internal modules) is concentrated on the right side, allowing users to more intuitively identify and distinguish the wiring areas of different functions.

[0122] In other embodiments, the central interface can also be configured to be closer to the first cable port 10c1 than the peripheral interface. In this case, the peripheral communication line of the external device enters the cable tray 10c through the second cable port 10c2 and is electrically connected to the peripheral interface; while the central communication line enters the cable tray 10c through the first cable port 10c1 and is electrically connected to the central interface. The purpose is still to distinguish between the external wiring side and the internal wiring side, which will not be elaborated here.

[0123] Based on the above, it can be seen that the power terminal block 70 and the cable tray 10c are located on different sides of the first sub-cavity 10a1, which helps to separate the power line from the communication line (peripheral communication line, central communication line), avoids the strong current of the power line from interfering with the weak current signal of the communication line, and ensures the stability and reliability of the communication signal.

[0124] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments, the main housing 10 includes a cover 12 and a heat dissipation structure 11. The cover 12 and the heat dissipation structure 11 are sealed together to form a first cavity 10a and a second cavity 10b. The sealed fit between the heat dissipation structure 11 and the cover 12 effectively prevents external contaminants such as dust and moisture from entering the first cavity 10a and the second cavity 10b. This sealing not only protects internal components from corrosion and short-circuit risks but also improves the reliability of the electrical control box 100 in harsh environments.

[0125] Understandably, the heat dissipation structure 11 can serve as part of the cavity wall of the first cavity 10a and the second cavity 10b, thereby more effectively conducting the heat dissipated by the main control module 30 and the frequency conversion drive module 20 installed in the second cavity 10b and the first cavity 10a, increasing the heat exchange area, improving heat dissipation efficiency, and ensuring that the main control module 30 and the frequency conversion drive module 20 remain stable under high load operation.

[0126] Furthermore, by incorporating the heat dissipation structure 11 as part of the cavity wall of the second cavity 10b and the first cavity 10a, the overall structure of the electrical control box 100 becomes more compact, reducing wasted internal space. Compared to the traditional approach of placing a heat dissipation plate within the electrical control box 100, this design reduces the number of components and assembly steps. By using the heat dissipation structure 11 as part of the cavity wall of the second cavity 10b and the first cavity 10a, the need for additional heat dissipation components and connectors is reduced, thereby lowering production costs.

[0127] Furthermore, the heat dissipation structure 11 is used as part of the cavity wall of the first cavity 10a and the second cavity 10b. That is, the heat dissipation structure 11 directly participates in the formation of the outer shell wall of the main box 10. In this way, when the electronic control box 100 is located in the air duct, the airflow in the air duct can quickly flow through the outer wall surface of the electronic control box 100, thereby fully exchanging heat. This allows for a faster release of the heat generated by the electronic control box 100.

[0128] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments, the first cavity 10a includes a first sub-cavity 10a1 and a second sub-cavity 10a2 arranged at intervals along the thickness direction of the main housing 10. Understandably, the main housing 10 is a shell structure with a certain thickness, the first sub-cavity 10a1 and the second sub-cavity 10a2 are arranged at intervals relative to each other in the thickness direction of the main housing 10, and a portion of the heat dissipation structure 11 separates the first sub-cavity 10a1 and the second sub-cavity 10a2.

[0129] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the frequency converter drive module 20 includes a drive board 21 and a filter board 22. The drive board 21 is disposed in the first sub-cavity 10a1, and the filter board 22 is disposed in the second sub-cavity 10a2. By setting the first sub-cavity 10a1 and the second sub-cavity 10a2, the partitioned layout of different functional modules is realized. In this embodiment, the drive board 21 is disposed in the first sub-cavity 10a1, and the filter board 22 is disposed in the second sub-cavity 10a2. The thickness direction of the drive board 21 and the filter board 22 is consistent with the thickness direction of the main housing 10. When viewed from the thickness direction of the main housing 10 (i.e., from one side to the other), the drive board 21 and the filter board 22 are arranged sequentially along the thickness direction of the main housing 10, rather than being placed horizontally or diagonally. This layout allows the drive board 21 and the filter board 22 to make full use of the space in the thickness direction of the main housing 10, so that the internal space of the control box 100 is rationally utilized and the overall structure is more compact. This design can realize more functions in a limited space and is suitable for application scenarios with high space requirements.

[0130] From a heat dissipation perspective, the drive board 21 is located in the first sub-cavity 10a1, while the filter board 22 is located in the second sub-cavity 10a2. This compartmentalized design avoids heat accumulation within a single cavity. A portion of the heat dissipation structure 11 forms a shared cavity wall between the first and second sub-cavities 10a1 and 10a2. This cavity wall not only serves as a physical separator but also acts as a heat conduction channel. Specifically, the material and structural design of the cavity wall allow heat to be efficiently conducted from higher-temperature components (such as the drive board 21) to the heat dissipation structure 11, thereby achieving rapid heat dissipation. This design not only effectively avoids localized overheating caused by heat accumulation but also further optimizes the overall heat dissipation performance of the control box 100 by rationally distributing heat, ensuring the stability and reliability of the drive board 21 and filter board 22 during long-term operation.

[0131] The first sub-cavity 10a1 and the second cavity 10b are located on the same side of the heat dissipation structure 11. The second cavity 10b can be located above the first sub-cavity 10a1. Both the first sub-cavity 10a1 and the second cavity 10b are facing the access port 200a. The access port 200a of the first sub-cavity 10a1 facing the housing 200 allows maintenance personnel to quickly access the drive board 21 and the main control module 30 in the first sub-cavity 10a1 and the second cavity 10b, thereby improving the efficiency of maintenance and repair and reducing workload.

[0132] Since the driver board 21 is typically used to implement the main functions of the control box 100, such as frequency conversion, control, and drive, in this embodiment, the driver board 21 is located within the first sub-cavity 10a1. The filter board 22 is used to filter high-frequency noise in the power supply, smooth DC voltage, and suppress electromagnetic interference; that is, it filters the electrical signal to remove noise and interference, ensuring the purity of the electrical signal. In this embodiment, the filter board 22 is located within the second sub-cavity 10a2. Following the above, the driver board 21 is located on the side facing the access port 200a, and the filter board 22 is located on the side away from the access port 200a. The driver board 21 typically integrates multiple functional circuits; for example, the insulated gate bipolar transistor (IGBT) commonly found in the driver board 21 is a device with a high failure rate. Due to the complexity and high failure rate of the driver board 21, it requires more frequent maintenance; therefore, its location on the side facing the access port 200a makes it easier for maintenance personnel to maintain. Compared to the driver board 21, the filter board 22 has a relatively lower failure rate. Common problems are mostly related to electrical parameter adjustments or mechanical connection issues, which are relatively easy to resolve, resulting in a lower maintenance frequency. Furthermore, the driver board 21 generates more heat than the filter board 22. Therefore, when the filter board 22 is located on the back side, it can more effectively utilize the airflow in the duct to remove the corresponding heat, resulting in better heat dissipation efficiency.

[0133] like Figure 7 , Figure 8 , Figure 9 and Figure 27 As shown, to achieve electrical connection between the drive board 21 in the first sub-cavity 10a1 and the filter board 22 in the second sub-cavity 10a2, the heat dissipation structure 11 is provided with a first opening 10d. The first opening 10d can be located in the middle part along the thickness direction of the heat dissipation structure 11. The first opening 10d connects the first sub-cavity 10a1 and the second sub-cavity 10a2. The electrical control box 100 also includes a power connection structure 95, which can be a conductive post, wire, or other conductive connector. The power connection structure 95 passes through the first opening 10d and can directly pass through the heat dissipation structure 11 with the shortest path, connecting the drive board 21 and the filter board 22 in the first sub-cavity 10a1 and the second sub-cavity 10a2. This design not only reduces the length of the power connection structure 95 and lowers material costs, but also reduces signal transmission losses and improves the efficiency and stability of the electrical connection. Because the path of the power connection structure 95 is the shortest, the internal space of the electrical control box 100 can be utilized more efficiently, reserving more space for other electronic components or functional modules.

[0134] Although the heat dissipation structure 11 between the drive board 21 and the filter board 22 has a first opening 10d, they are still physically isolated to a certain extent, which helps to maintain their respective working environments, such as temperature, vibration and pollution.

[0135] By providing a first opening 10d and a power connection structure 95 inside the heat dissipation structure 11, the connection between the driver board 21 and the filter board 22 can be completed inside the heat dissipation structure 11 without the need for external wiring. This reduces the need for external wiring between the driver board 21 and the filter board 22, 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 heat dissipation structure 11 can be reduced accordingly, which helps improve the sealing performance of the heat dissipation structure 11, thereby better protecting the internal circuit modules from the intrusion of dust, moisture, and other contaminants.

[0136] Since the drive board 21 and filter board 22 in the first sub-cavity 10a1 and the second sub-cavity 10a2 have relatively independent functions and are connected through the power connection structure 95, this cavity design makes the internal functional division of the control box 100 clearer, which is convenient for management and maintenance. When a certain circuit module needs to be maintained or repaired, the problem can be located more quickly, reducing the impact on other circuit modules and improving maintenance efficiency.

[0137] Furthermore, the drive board 21 and the filter board 22 are located in separate cavities and are electrically connected via the power connection structure 95. They are partially isolated by the heat dissipation structure 11. This layout effectively reduces signal interference between the drive board 21 and the filter board 22. In the control box 100, signal interference is one of the important causes of equipment instability and malfunction. The cavity design significantly reduces this interference and improves the reliability of the control box 100.

[0138] like Figure 8 , Figure 9 , Figure 11 and Figure 12 As shown, in some embodiments, the power-connecting structure 95 includes an insulating base 951 and a power-connecting post 952. The insulating base 951 is installed at the first opening 10d. Multiple latching slots 10d1 are spaced apart on the inner wall of the first opening 10d. The insulating base 951 includes a latching part 9513 adapted to the latching slot. By latching the latching part 9513 into the latching slot 10d1, the insulating base 951 is securely installed at the first opening 10d of the heat dissipation structure 11. In other embodiments, the insulating base 951 can also be installed at the first opening 10d by riveting, bonding, or other methods. The insulating base 951 serves as insulation, preventing current leakage or short circuits and ensuring electrical safety. The contact post 952 is mounted on the insulating base 951. The contact post 952 can be fixed to the insulating base 951 by crimping, welding, or pre-embedded in the cavity via injection molding, connecting to the insulating base 951 as a single unit during molding. In other words, the insulating base 951 provides fixation and support for the contact post 952, maintaining its connection stability and preventing loosening due to vibration or other reasons. The contact post 952 extends axially along the thickness direction of the main housing 10, passing through the first opening 10d, and connects to the drive plate 21 and filter plate 22 at both ends. The contact post 952 is typically made of conductive material, such as copper or copper alloy, effectively conducting current to transmit electrical signals and ensure normal circuit operation.

[0139] Multiple electrical terminals 952 are provided, arranged side by side along the left and right direction of the main box 10. All electrical terminals 952 are mounted on the insulating base 951. Multiple electrical terminals 952 can distribute the current and prevent a single electrical terminal 952 from overheating or being damaged due to excessive current, thereby extending the service life of the electrical terminals 952.

[0140] like Figure 8 , Figure 9 , Figure 11 and Figure 12As shown, specifically, the insulating base 951 includes a base body 9511 and a limiting part 9512 and a latching part 9513 respectively connected to the base body 9511. The base body 9511 is the main body of the insulating base 951 and is used to support the power connection post 952. The power connection post 952 passes through the base body 9511 and provides the basic structure for installing the limiting part 9512 and the latching part 9513. The limiting part 9512 protrudes from the outer wall surface of the base body 9511 and is arranged around the circumference of the base body 9511. The latching part 9513 and the limiting part 9512 are spaced apart along the depth direction of the first opening 10d. That is, the limiting part 9512 is located on one side of the base body 9511, while the latching part 9513 is closer to the other side of the base body 9511 than the limiting part 9512. When the insulating base 951 is installed in the first opening 10d, the limiting part 9512 abuts against the end face connecting the first opening 10d. The limiting part 9512 can limit the position of the insulating base 951 in the depth direction of the first opening 10d. This ensures that the insulating base 951 is accurately positioned on the heat dissipation structure 11 and prevents the insulating base 951 from shifting during installation.

[0141] Please continue reading. Figure 7 , Figure 8 , Figure 9 and Figure 11 The heat dissipation structure 11 also has a recessed groove 10d1 formed on the inner wall of the first opening 10d. The latching part 9513 is latched into the groove 10d1. The latching part 9513 is usually designed to have a certain degree of elasticity, so that it can be latched into the groove 10d1 of the heat dissipation structure 11 through elastic deformation. Multiple latching parts 9513 are provided, and multiple latching parts 9513 are spaced apart along the outer periphery of the base part 9511 to provide a more stable fixing force and prevent loosening caused by uneven local force. Moreover, the design of multiple latching parts 9513 improves the reliability of the overall structure. Even if one latching part 9513 fails due to external force or wear, the other latching parts 9513 can still keep the insulating base 951 fixed.

[0142] Furthermore, the limiting part 9512 and the snap-fit ​​part 9513 cooperate to clamp the heat dissipation structure 11. Specifically, the limiting part 9512 restricts the position of the insulating seat 951 on one side of the depth direction of the first opening 10d, while the snap-fit ​​part 9513 snaps into the snap-fit ​​groove 10d1 on the other side of the depth direction of the first opening 10d, so that the limiting part 9512 and the snap-fit ​​part 9513 cooperate to clamp the wall in the depth direction of the first opening 10d. This ensures that the insulating seat 951 is accurately positioned and firmly fixed on the heat dissipation structure 11, and will not loosen even under vibration or impact.

[0143] Please continue reading. Figure 7 , Figure 8 , Figure 9 and Figure 11Furthermore, in some embodiments, a guide protrusion 9511a is provided on one of the outer wall surface of the base portion 9511 and the inner wall surface of the first opening 10d, while a guide groove 10d2 is provided on the other of the outer wall surface of the base portion 9511 and the inner wall surface of the first opening 10d. The guide groove 10d2 extends along the insertion direction of the insulating base 951, and the guide protrusion 9511a is inserted into the guide groove 10d2. The cooperation between the guide protrusion 9511a and the guide groove 10d2 can significantly improve the accuracy and efficiency of installation. The guide protrusion 9511a and the guide groove 10d2 can smoothly guide the insulating base 951 into the first opening 10d of the heat dissipation structure 11 in the correct direction, ensuring the smooth progress of the installation process.

[0144] In this embodiment, a guide protrusion 9511a is disposed on the base portion 9511, and the guide protrusion 9511a extends along the depth direction of the first opening 10d. The depth direction of the first opening 10d is the same as the thickness direction of the main box 10. The guide protrusion 9511a is used to guide the insulating base 951 to be correctly inserted into the first opening 10d of the heat dissipation structure 11 during installation. The wire protrusion can be disposed between two adjacent snap-fit ​​portions 9513. During installation, the guide protrusion 9511a of the insulating base 951 is aligned with the guide groove 10d2 of the heat dissipation structure 11 to ensure that the guide protrusion 9511a can be inserted smoothly. At the same time, the snap-fit ​​portion 9513 is automatically aligned with the snap groove 10d1 on the heat dissipation structure 11. The snap-fit ​​portion 9513 is snapped into the snap groove 10d1 through elastic deformation, thus completing the fixation of the insulating base 951.

[0145] The guide protrusion 9511a is located on one side of the base portion 9511 along the height direction. This asymmetrical design gives the insulating base 951 a clear directionality during installation. Operators can easily determine the correct installation direction of the insulating base 951 by observing the positions of the guide protrusion 9511a and the guide groove 10d2, thus avoiding installation failure due to incorrect orientation.

[0146] like Figure 11 , Figure 12 , Figure 13 and Figure 14 As shown, to connect the driver board 21, filter board 22, and terminal 952, in some embodiments, the driver board 21 includes a first substrate 211, which is the main body of the driver board 21 and provides physical mounting positions for various electronic components (such as capacitors, resistors, chips, connectors, etc.) in the driver board 21. The filter board 22 includes a second substrate 221, which is the main body of the filter board 22 and provides a mounting platform for various electronic components (such as capacitors, resistors, chips, etc.) in the filter board 22, ensuring that these components remain stable during operation.

[0147] The first substrate 211 and the second substrate 221 are respectively mounted on the first and second sides of the heat dissipation structure 11 along the thickness direction. Their thickness direction is consistent with the thickness direction of the main housing 10, that is, they are arranged along the thickness direction of the main housing 10. This layout allows the larger surfaces of the first substrate 211 and the second substrate 221 to be close to the heat dissipation structure 11, ensuring that heat can be efficiently conducted from the first substrate 211 and the second substrate 221 to the heat dissipation structure 11. It also makes the internal structure of the electrical control box 100 more compact and saves space.

[0148] Please continue reading. Figure 11 , Figure 12 , Figure 13 and Figure 14 The first substrate 211 has a first power contact hole 211a, and the second substrate 221 has a second power contact hole 221a. The two ends of the power contact post 952 have a first connection hole 952a and a second connection hole 952b, respectively. The first connection hole 952a and the first power contact hole 211a are electrically connected by a connector. The connector 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 contact post 952 with the first connection hole 952a abuts against the position of the first substrate 211 with the first power contact hole 211a. Then, the connector is inserted into the first power contact hole 211a of the first substrate 211 and the first connection hole 952a of the power contact post 952, and the electrical connection is achieved by tightening the bolt. The spring washer is disposed between the first substrate 211 and the bolt to prevent the bolt from loosening and to provide a reliable electrical connection. The second connection hole 952b and the second electrical connection hole 221a are electrically connected via a connector. The specific installation method can be the same as or similar to the method described above, and will not be repeated here. By providing electrical connection holes on the first substrate 211 and the second substrate 221, and achieving electrical connection through the electrical connection post 952 and the connector, the connection between 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.

[0149] To ensure the accurate and secure connection of the first substrate 211 and the second substrate 221 to the heat dissipation structure 11, in some embodiments, the heat dissipation structure 11 is further provided with a first support post 115 and a second support post 116. The first support post 115 is located in the first sub-cavity 10a1, and the second support post 116 is located in the second sub-cavity 10a2. Specifically, the heat dissipation structure 11 includes a cold plate body 111, a first support post 115, and a second support post 116. The first support post 115 is connected to one side of the cold plate body 111 and extends toward the first substrate 211, and the second support post 116 is connected to the other side of the cold plate body 111 and extends toward the second substrate 221. The first substrate 211 is also provided with a first mounting hole 211b, and the second substrate 221 is provided with a second mounting hole 221b. Understandably, the first mounting hole 211b... The position of the first support post 115 corresponds to that of the second mounting hole 221b, and the position of the second mounting hole 221b corresponds to that of the second support post 116. The first support post 115 is connected to the first mounting hole 211b to support the first substrate 211, and the second support post 116 is connected to the second mounting hole 221b to support the second substrate 221. Screws or other fasteners can be locked in the first mounting hole 211b and the second mounting hole 221b to form a tight connection with the first support post 115 and the second support post 116. The first support post 115 and the second support post 116 provide additional support for the first substrate 211 and the second substrate 221. The first substrate 211 and the second substrate 221 are effectively supported on the heat dissipation structure 11, which helps to maintain the flatness and stability of the first substrate 211 and the second substrate 221, especially when carrying other electronic components or in a high vibration environment.

[0150] The first support pillar 115 and the second support pillar 116 respectively lift the first substrate 211 and the second substrate 221, ensuring that both substrates 211 and 221 maintain an appropriate distance from the heat dissipation structure 11. This increases the airflow space between the first substrate 211 and 221 and the heat dissipation structure 11, thus improving heat dissipation efficiency. Furthermore, the first support pillar 115 and the second support pillar 116 can also serve as part of the heat conduction path. For example, if the first support pillar 115 and the second support pillar 116 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 first substrate 211 and the second substrate 221 to the heat dissipation structure 11, thereby improving heat dissipation efficiency.

[0151] Understandably, multiple first support pillars 115 and multiple second support pillars 116 can be provided. Multiple first support pillars 115 can be spaced apart on the circumferential direction near the outer edge of the first substrate 211. If the second substrate 221 has a square plate structure, multiple second support pillars 116 can be provided on the four corners of the second substrate 221. Multiple first support pillars 115 and multiple second support pillars 116 can provide a uniformly distributed support force, thereby improving the stability of supporting the first substrate 211 and the second substrate 221.

[0152] Please see Figure 10 , Figure 13 and Figure 14 In some embodiments, the first support post 115 is further provided with a first positioning protrusion 1152a, and the first substrate 211 is also provided with a first positioning hole 211c corresponding to the first positioning protrusion 1152a. During installation, the first positioning protrusion 1152a is inserted into the first positioning hole 211c, ensuring the precise positioning of the first substrate 211 on the first support post 115, preventing the first substrate 211 from shifting on the first support post 115, and maintaining the relative position stability between the substrate and the heat dissipation structure 11. Furthermore, the position of the first substrate 211 is pre-positioned, reducing the difficulty of subsequently installing screws or other fasteners in the first mounting hole 211b.

[0153] Specifically, the first support column 115 includes a connecting sub-part 1151 and a positioning sub-part 1152 connected to each other. Both the connecting sub-part 1151 and the positioning sub-part 1152 are connected to the cold plate body 111 and extend toward the first substrate 211. Their axes are relatively parallel. The end of the positioning sub-part 1152 away from the cold plate body 111 has the aforementioned first positioning protrusion 1152a. The first positioning protrusion 1152a can pass through the first positioning hole 211c. The end of the connecting sub-part 1151 away from the cold plate body 111 abuts against the first substrate 211 and is connected to the first mounting hole 211b by screws or other fasteners. In this embodiment, a screw is used to fasten the connecting sub-part 1151 to the first substrate 211. The end of the connecting sub-part 1151 facing the first substrate 211 has a threaded hole. During assembly, the first substrate 211 is first placed on one side of the cold plate body 111, so that the first positioning protrusion 1152a of the positioning sub-part 1152 is aligned with the first positioning hole 211c of the first substrate 211. The first substrate 211 is gently pressed down so that the first positioning protrusion 1152a passes through the first positioning hole 211c, thus achieving the initial positioning of the first substrate 211. Subsequently, the screw is passed through the threaded hole of the connecting sub-part 1151 and engages with the first mounting hole 211b. The screw is then tightened to fix the first substrate 211.

[0154] In some embodiments, the second support post 116 is further provided with a second positioning protrusion 1161, and the second substrate 221 is also provided with a second positioning hole 221c corresponding to the second positioning protrusion 1161, into which the second positioning protrusion 1161 is inserted. This design has a similar effect to the first positioning protrusion 1152a, enabling pre-positioning of the second substrate 221, reducing the installation difficulty of locking the second support post 116 and the second substrate 221, and requiring no assistance from others. The specific structure of the second support post 116 can be the same as or similar to that of the first support post 115; therefore, it will not be described in detail here.

[0155] Furthermore, two drive boards 21 are laid flat in the first sub-cavity 10a1. The two drive boards 21 can be arranged at intervals along the vertical direction of the main box 10, so that the drive boards 21 can make full use of the space of the first sub-cavity 10a1, improve the space utilization rate, effectively reduce electromagnetic interference between drive boards 21, and facilitate heat dissipation.

[0156] There are two power connection structures 95. The two power connection structures 95 are respectively located on the side of the two drive plates 21 that are close to each other. The two power connection structures 95 are respectively located on the side of the two drive plates 21 that are relatively close to each other in the vertical direction (i.e., the lower side of the upper drive plate 21 and the upper side of the lower drive plate 21). This layout makes the positions of the two power connection structures 95 relatively concentrated, which facilitates unified operation during the assembly process. When installing the power connection structures 95, the operator can more easily operate the two power connection structures 95 simultaneously, reducing assembly time and labor intensity.

[0157] The two driver boards 21 are electrically connected to the filter board 22 through a corresponding power connection structure 95. This design ensures that each driver board 21 can independently transmit signals to the filter board 22, thereby improving the stability and reliability of signal transmission.

[0158] In some embodiments, the two drive boards 21 are centrally symmetrically arranged. In this embodiment, the two drive boards 21 are located on the upper and lower sides of the first sub-cavity 10a1, respectively, and are symmetrical about a central point. Since each side of the components on the drive boards 21 is symmetrical, the current distribution can be balanced, thereby reducing the asymmetry of the electromagnetic field and improving the performance and stability of the circuit. The centrally symmetrical arrangement simplifies the layout and wiring of the circuit board, making the wiring neater and more orderly. This layout helps to reduce the complexity of wiring, improve wiring efficiency, and help reduce electromagnetic interference.

[0159] Alternatively, the two grounding structures 95 can be arranged symmetrically. This symmetrical arrangement makes wiring more intuitive and simpler, reducing complexity and error rates, simplifying assembly, and decreasing assembly time and labor intensity. During high-frequency signal transmission, the distribution and propagation characteristics of the electromagnetic field are affected by structural symmetry. When the grounding structures 95 are symmetrical, interference signals will generate components with opposite phases along the symmetrical path. These components cancel each other out during propagation, thus reducing interference intensity. Therefore, two symmetrical grounding structures 95 can reduce high-frequency interference.

[0160] Alternatively, the two driver boards 21 and the two power connection structures 95 can be arranged symmetrically at the center. This design combines the advantages of the two arrangements mentioned above, further optimizing the overall performance of the control box 100. Specifically, this layout not only simplifies the layout and wiring of the driver boards 21 and improves circuit performance and stability, but also reduces electromagnetic interference, optimizes the signal transmission path, reduces high-frequency interference, and improves the system's anti-interference capability. At the same time, this design also facilitates assembly and maintenance, improving system reliability. Further details are omitted here.

[0161] like Figure 13 , Figure 14 , Figure 15 and Figure 16 As shown, in some embodiments, the heat dissipation structure 11 is provided with a mounting port 11a communicating with the second sub-cavity 10a2. The power connector 70 is installed at the mounting port 11a, which is located on the side of the first sub-cavity 10a1 away from the second cavity 10b. In this embodiment, the first sub-cavity 10a1 and the second cavity 10b are arranged at intervals along the length of the electrical control box 100, and the second cavity 10b is located above the first sub-cavity 10a1. Understandably, the mounting port 11a is located below the first sub-cavity 10a1. The vertical space on the heat dissipation structure 11 is fully utilized, making the overall structure of the electrical control box 100 more compact and saving space, which is particularly suitable for application scenarios with high space requirements. It also achieves electrical isolation between the power connector 70 and the drive board 21, reducing the risk of electrical short circuits. The power connector 70 is partially exposed on the side of the heat dissipation structure 11 facing away from the second sub-cavity 10a2, making the connection and disconnection of the power cord more convenient. Maintenance personnel can easily access the power terminal block 70 from the outside without disassembling the entire electrical control box 100, thus improving maintenance efficiency.

[0162] Furthermore, a portion of the power connector 70 extends into the second sub-cavity 10a2 and is electrically connected to the filter board 22. This ensures that after the external power cable is connected, the power signal is first filtered by the filter board 22, such as removing high-frequency noise and suppressing harmonics, before being transmitted to the driver board 21 and the main control module 30. This layout reduces the length of the power cable within the control box 100, avoiding interference during power signal transmission. The power connector 70 provides a stable power input, and centralized management of the power cables through the power connector 70 makes the power cable connections more standardized, reducing tangled power cables and improving the tidiness inside the control box 100.

[0163] like Figure 14 , Figure 16 , Figure 17 and Figure 18 The electrical control box 100 also includes a first sealing ring 992. The first sealing ring 992 is disposed on the side of the heat dissipation structure 11 facing the second sub-cavity 10a2 and is arranged around the mounting port 11a in the circumferential direction. The power terminal block 70 has a sealing groove 70a. Part of the first sealing ring 992 is embedded in the sealing groove 70a and seals against the bottom wall of the limiting groove 11b, effectively preventing liquids (such as water) and dust from entering the second sub-cavity 10a2 and protecting the electronic components in the second sub-cavity 10a2 from contamination and damage.

[0164] like Figure 14 , Figure 15 ,and Figure 16 In some embodiments, the projections of the first sub-cavity 10a1 and the second sub-cavity 10a2 along the thickness direction of the main housing 10 overlap, which can utilize the internal space of the main housing 10 more efficiently, reduce the overall volume, and make the electrical control box 100 more compact. The first sub-cavity 10a1 has a first edge 10a11 disposed vertically away from the second cavity 10b, while the second sub-cavity 10a2 has a second edge 10a21 disposed vertically away from the second cavity 10b. Understandably, the first edge 10a11 and the second edge 10a21 are the lower edges of the first sub-cavity 10a1 and the second sub-cavity 10a2 respectively in the vertical direction, and the first edge 10a11 is closer to the second cavity 10a21 than the second edge 10a21. The 0b setting, where the second edge 10a21 of the second sub-cavity 10a2 is further away from the first edge 10a11 of the first sub-cavity 10a1, avoids excessive overlap or interference between the second sub-cavity 10a2 and the first sub-cavity 10a1. At the same time, it provides sufficient space for the drive board 21 in the first sub-cavity 10a1 and the filter board 22 in the second sub-cavity 10a2 according to actual needs, ensuring the normal installation and operation of the drive board 21 and the filter board 22.

[0165] The mounting port 11a is located between the first edge 10a11 of the first sub-cavity 10a1 and the second edge 10a21 of the second sub-cavity 10a2, making the mounting port 11a a relatively independent and easy-to-operate area. The power terminal block 70 can be installed vertically between the first sub-cavity 10a1 and the second sub-cavity 10a2. Under the premise of realizing the electrical connection between the filter board 22 and the drive board 21, the wiring between the power terminal block 70 and the filter board 22 is also more convenient, without needing to occupy the external space of the control box 100.

[0166] like Figure 16 , Figure 17 and Figure 18 In some embodiments, the power terminal block 70 includes an insulating base 71 and a conductive post 72. The insulating base 71 is connected to the heat dissipation structure 11 and seals the mounting port 11a. The main function of the insulating base 71 is to provide electrical insulation to prevent accidental current flow between different conductive parts, thereby ensuring the safety and reliability of the power terminal block 70. The conductive post 72 passes through the insulating base 71, that is, the insulating base 71 also serves to support and fix the conductive post 72, ensuring the stable installation of the conductive post 72.

[0167] Furthermore, the conductive post 72 extends along the thickness direction of the main housing 10, with one end of the conductive post 72 extending into the second sub-cavity 10a2 and connecting to the filter plate 22. The conductive post 72 is used to realize the electrical connection between the power cord and the internal circuit of the control box 100 (such as the filter plate 22). Specifically, the filter plate 22 has a third connection hole, and the conductive post 72 has a fourth connection hole on the side facing the filter plate 22. The third connection hole and the fourth connection hole are electrically connected by a connector, which can be a bolt, nut, washer, or other conductive connector. The other end of the conductive post 72 is exposed on the surface of the second sub-cavity 10a2 via the insulating base 71, facilitating the connection of the external power cord.

[0168] The insulating base 71 can be made of polycarbonate (PC), which has good insulation properties and mechanical strength. The conductive post 72 can be made of copper alloy, which has good electrical conductivity.

[0169] like Figure 13 , Figure 16 , Figure 17 and Figure 18 In some embodiments, the insulating base 71 includes an insulating body 711 and a connecting flange 712 protruding from the outer wall of the insulating body 711. The insulating body 711 is the main part of the insulating base 71 and is mainly used to provide electrical insulation to prevent accidental current flow between different conductive parts and to ensure the safety and reliability of the power terminal block 70. The insulating body 711 extends into the second sub-cavity 10a2, and the conductive post 72 passes through the insulating body 711.

[0170] The heat dissipation structure 11 has a limiting groove 11b surrounding the mounting opening 11a on one side of the second sub-cavity 10a2. The connecting flange 712 is embedded in the limiting groove 11b, meaning the limiting groove 11b is used to accommodate the connecting flange 712 of the insulating base 71. The connecting flange 712 ensures a stable connection between the insulating base 71 and the heat dissipation structure 11. This design not only enhances the stability of the structure but also improves the reliability of installation through the embedded connection method.

[0171] like Figure 14 , Figure 17 and Figure 18 As shown, to ensure the correct assembly of the power connector 70 and the limiting groove 11b, in some embodiments, a foolproof protrusion 119 is provided on the bottom wall of the limiting groove 11b, and a foolproof hole 712a is provided on the connecting flange 712 to cooperate with the foolproof protrusion 119, effectively preventing assembly problems caused by operator negligence or error, such as incorrect assembly direction or incorrect position. The foolproof protrusion 119 extends along the thickness direction of the main housing 10 and passes through the foolproof hole 712a, which can also limit the position of the power connector 70 from the vertical direction.

[0172] like Figure 4 , Figure 16 , Figure 17 and Figure 18 As shown, in some embodiments, the electrical control box 100 further includes a terminal block protective shell 80. The terminal block protective shell 80 is connected to the heat dissipation structure 11 and is located on the side of the first sub-cavity 10a1 away from the second cavity 10b. In this embodiment, the second cavity 10b, the first sub-cavity 10a1, and the terminal block protective shell 80 are arranged sequentially along the length of the electrical control box 100, which is set vertically. Therefore, the terminal block protective shell 80 is located below the first sub-cavity 10a1. The main function of the terminal block protective shell 80 is to provide additional protection for part of the structure of the power terminal block 70, preventing damage to the power terminal block 70 from the external environment (such as dust, moisture, mechanical impact, etc.), providing a relatively protected environment, and reducing the risk of electrical faults caused by external factors. Furthermore, the terminal block protective shell 80 makes the maintenance and inspection of the power terminal block 70 more convenient, without the need to disassemble the entire electrical control box 100.

[0173] like Figure 16 , Figure 17 and Figure 18As shown, the terminal block protective housing 80 is provided with a protective cavity 80a and a clearance opening 80b communicating with the protective cavity 80a. The terminal block protective housing 80 includes a first protective half-shell 81 and a second protective half-shell 82 that are mutually overlapping. The first protective half-shell 81 and the second protective half-shell 82 can be firmly connected by fastening screws. The second protective half-shell 82 is further connected to the heat dissipation structure 11 by fastening screws. The first protective half-shell 81 is located on the front side along the thickness direction of the main housing 10, while the second protective half-shell 82 is located on the rear side along the thickness direction of the main housing 10. That is, compared with the first protective half-shell 81, the second protective half-shell 82 is located closer to the heat dissipation structure 11. The first protective half-shell 81 and the second protective half-shell 82 together enclose the protective cavity 80a, which is the internal space of the terminal block protective housing 80 and is used to accommodate part of the power terminal block 70. The clearance opening 80b is located on the side of the second protective half-shell 82 facing the heat dissipation structure 11. The terminal block protective shell 80 also includes a reinforcing strip structure, which surrounds the clearance opening 80b in the circumferential direction and is located inside the protective cavity 80a. This can significantly enhance the overall structural strength of the terminal block protective shell 80 and effectively prevent the protective shell from deforming or being damaged when subjected to external mechanical impact or vibration, thereby improving the durability and reliability of the terminal block protective shell 80.

[0174] like Figure 16 , Figure 17 and Figure 18 As shown, the portion of the power connector 70 exposed outside the main housing 10 extends into the protective cavity 80a via the clearance opening 80b. When the power connector 70 requires maintenance and inspection, it is not necessary to disassemble the entire connector protective shell 80; instead, only the first protective half-shell 81 needs to be removed to expose the portion of the power connector 70. Furthermore, the connector protective shell 80 makes the appearance of the electrical control box 100 neater and more uniform, improving the product's overall appearance quality.

[0175] Furthermore, the bottom of the terminal block protective housing 80 is provided with a power cord outlet 80c, which is defined by the first protective half-shell 81 and the second protective half-shell 82, so that the power cord can be directly led out from the bottom of the terminal block protective housing 80, avoiding the messy arrangement of the power cord inside the protective housing and making the wiring neater and more beautiful.

[0176] like Figure 3 , Figure 7 and Figure 16As shown, to improve the convenience of power cord wiring, in some embodiments, the housing 200 includes an outer shell 210 and a chassis 220 disposed at the bottom of the outer shell 210. The chassis 220 is provided with a wire pass-through port 220a opening upwards. The main box 10 is located above the wire pass-through port 220a, and the power cord outlet 80c of the control box 100 is arranged opposite to the wire pass-through port 220a in the vertical direction, so as to shorten the distance between the power cord and the power terminal block 70. The power cord can directly enter the power terminal block 70 inside the main box 10 from the wire pass-through port 220a of the chassis 220, avoiding the circuitous wiring of the power cord inside the housing 200, making the wiring operation more convenient.

[0177] In this embodiment, the control box 100 has a length direction, which is arranged vertically. The main control module 30, the frequency converter drive module 20, and the power terminal block 70 are arranged sequentially along the length direction. Specifically, the power terminal block 70 is located below the drive board 21, that is, the power terminal block 70 and the cable tray 10c are located on opposite sides of the frequency converter drive module 20 in the vertical direction. This layout allows the power cable to pass through the cable inlet 220a and directly connect to the power terminal block 70 through the power cable outlet 80c at the bottom of the main box 10, without excessive crossing with other circuit modules (such as the main control power board 32 and the main control board 31). This design effectively avoids electromagnetic interference between the power cable and other circuit modules, improving the stability and reliability of signal transmission.

[0178] A portion of the power connector 70 extends into the second sub-cavity 10a2 and is electrically connected to the filter board 22. This ensures that after an external power line is connected, the power signal is first filtered by the filter board 22, such as removing high-frequency noise and suppressing harmonics, before being transmitted to other circuit modules. This layout reduces the length of the power lines within the control box 100, avoiding interference during power signal transmission. The power connector 70 provides a stable power input, and centralized management of the power lines through the power connector 70 makes the power line connections more standardized, reducing tangled power lines and improving the tidiness of the control box 100.

[0179] like Figure 6 , Figure 16 , Figure 17 and Figure 18 As shown, in some embodiments, the electrical control box 100 further includes a cable outlet structure 94, which is connected to the terminal block protective shell 80 and located inside the protective cavity 80a. The cable outlet structure 94 is disposed opposite to the power cord outlet 80c, and a cable outlet cavity 94a communicating with the power cord outlet 80c is formed on the cable outlet structure 94. The power cord can pass through the protective cavity 80a in sequence through the cable outlet cavity 94a and the power cord outlet 80c, providing an orderly channel for the power cord and ensuring that the power cord can safely and stably pass out from the inside of the electrical control box 100.

[0180] like Figure 16 , Figure 17 and Figure 18 As shown, specifically, the cable exit structure 94 includes a first cable exit base 941 and a second cable exit base 942 connected together. The first cable exit base 941 is connected to the second protective half-shell 82. The cable exit structure 94 is locked by screws that are sequentially inserted through the second cable exit base 942, the first cable exit base 941, and the second protective half-shell 82. The cable exit cavity 94a has a first cavity wall 9411 and a second cavity wall 9421 arranged opposite to each other. The first cavity wall 9411 is formed on the first cable exit base 941, and the second cavity wall 9421 is formed on the second cable exit base 942. It can be understood that the power cord can be clamped between the first cavity wall 9411 and the second cavity wall 9421. Among them, the first cavity wall 9411 has a plurality of spaced cable exit recesses 9411a. The plurality of cable exit recesses 9411a can accommodate a plurality of power cords respectively, making the layout of the power cord more orderly and avoiding messy wire bundles. Furthermore, the outlet notch 9411a can effectively guide the direction of the power cord, preventing the power cord from twisting or being damaged during the outgoing process.

[0181] like Figure 6 , Figure 7 and Figure 8 As shown, in some embodiments, the heat dissipation structure 11 further includes a first enclosure 112 and a second enclosure 113 integrally formed with the aforementioned cold plate body 111. The integrated heat dissipation structure 11 enhances the overall strength and durability, reducing the risk of damage due to vibration or impact. The cold plate body 111 is plate-shaped and is typically made of a material with good thermal conductivity (such as aluminum alloy or copper alloy) to ensure efficient heat conduction. The heat dissipation structure 11 has heat dissipation channels for the flow of heat exchange medium. These channels are mainly formed on the cold plate body 111, meaning the cold plate body 111 is equipped with heat dissipation channels. Heat can be carried away by coolant or air flow. The design of the heat dissipation channels can effectively absorb the heat generated by electronic components and conduct and dissipate it through the channels, maintaining the internal temperature of the electrical control box 100 within a reasonable range.

[0182] The heat dissipation channel includes multiple straight segments and multiple curved segments, which are interwoven to increase the contact area between the cooling medium (such as air or coolant) and the heat dissipation surface, thereby improving heat dissipation efficiency.

[0183] The box cover 12 includes a first box cover 121, a second box cover 122, and a third box cover 123. The cold plate body 111 includes a first side and a second side. The first box cover 121 and the second box cover 122 are respectively disposed on the first side and the second side of the cold plate body 111. The first side panel 112 and the second side panel 113 are connected to the same side of the cold plate body 111. The first side panel 112 and the second side panel 113 are arranged at intervals in the vertical direction. The first box cover 121 and the first side panel 112 are located away from the cold plate body 111. One side is sealed to form the first sub-cavity 10a1, the second cover 122 is sealed to the second side of the cold plate body 111 to form the second sub-cavity 10a2, and the third cover 123 is sealed to the second enclosure 113 and the first side of the cold plate body 111 to form the second cavity 10b. This sealing fit can effectively prevent dust and moisture from entering and protect the drive board 21 in the first sub-cavity 10a1, the main control module 30 in the second cavity 10b, and the filter board 22 in the second sub-cavity 10a2.

[0184] To facilitate maintenance personnel in opening the first cover 121 and the third cover 123, both the first cover 121 and the third cover 123 are configured such that their upper ends are rotatably connected to the heat dissipation structure 11, and their lower ends are secured to the heat dissipation structure 11 by screws. This allows for maintenance or inspection without completely disassembling the first cover 121 and the third cover 123; simply loosening the screws allows the first cover 121 and the third cover 123 to be flipped to a suitable angle. A suspension member can also be provided on the inner side of the third cover 123. The heat dissipation structure 11 has a suspension hole that allows the suspension member to abut. One end of the suspension member is connected to the third cover 123, and the other end is movable and can be partially inserted into the suspension hole, so that the third cover 123 remains in a flipped state, facilitating operation by maintenance personnel.

[0185] From a heat dissipation perspective, the drive board 21 and filter board 22 generate heat during operation. At least one side of each board faces the cold plate body 111. Since the thickness direction of the drive board 21 and filter board 22 is consistent with the thickness direction of the main housing 10, the side facing the cold plate body 111 is usually the larger side of the drive board 21 and filter board 22. The heat from these sides is mainly transferred to the cold plate body 111 through thermal conduction, and then dissipated to the external environment through the heat dissipation function of the cold plate body 111. Through the thermal conduction and convection heat dissipation function of the cold plate body 111, the heat generated by the drive board 21 and filter board 22 can be quickly removed, maintaining the internal temperature of the electrical control box 100 within a reasonable range. The sides of the drive board 21 and filter board 22 facing away from the cold plate body 111 face the first cover 121 and the second cover 122, respectively. These sides can dissipate heat to the surrounding environment through radiation. This comprehensive heat dissipation strategy not only improves the efficiency of heat transfer but also ensures the stability and reliability of the equipment during long-term operation.

[0186] In this embodiment, the second cover 122 is sealed to the side of the cold plate body 111 facing away from the first enclosure 112 to form the second sub-cavity 10a2. Since the second cover 122 is directly sealed to the side of the cold plate body 111 facing away from the first enclosure 112, there is no need to set up an additional enclosure. The process is simpler, which can improve production efficiency and reduce manufacturing costs.

[0187] like Figure 14 As shown, specifically, the cold plate body 111 has a mounting boss 114 protruding on the side facing the second cover 122. The second cover 122 covers the mounting boss 114, and the second cover 122 and the mounting boss 114 together form the second sub-cavity 10a2. The mounting boss 114 is provided with a limiting protrusion 118, which surrounds the circumference of the mounting boss 114 and defines the installation area of ​​the filter plate 22. The inner wall of the second cover 122 is located outside the limiting protrusion 118. The side of the second cover 122 facing the mounting boss 114 has a sealing groove 122a. The electrical control box 100 also includes a second sealing ring 993. Part of the second sealing ring 993 is embedded in the sealing groove 122a and seals against the mounting boss 114, effectively preventing external dust, moisture and other impurities from entering the second sub-cavity 10a2.

[0188] like Figure 6 , Figure 7 and Figure 14 As shown, further, the second cover 122 is provided with a plurality of first connecting ears 1221 spaced apart in the circumferential direction. The first connecting ears 1221 have first threaded holes. The heat dissipation structure 11 is provided with second threaded holes that are opposite to the first threaded holes. The second threaded holes are located on the outside of the mounting boss 114. The electrical control box 100 also includes screws that pass through the first threaded holes and the second threaded holes, so that the second cover 122 is tightly connected to the heat dissipation structure 11, thereby improving the sealing performance of the second sub-cavity 10a2.

[0189] In another configuration, the heat dissipation structure 11 may also include a third enclosure plate, which is also integrally formed with the cold plate body 111, significantly enhancing the integrity and stability of the heat dissipation structure 11. This design makes the heat dissipation structure 11 more robust and better able to withstand the heat generated by the internal circuit modules and external mechanical pressure. The third enclosure plate is connected to the side of the cold plate body 111 facing away from the first enclosure plate 112, and the second cover 122 is sealed to the side of the third enclosure plate away from the cold plate body 111 to form a second sub-cavity 10a2, which can better seal the second sub-cavity 10a2, preventing dust, moisture and other external impurities from entering and improving the protection level of the electrical control box 100.

[0190] like Figure 8As shown, the cold plate body 111, the first enclosure plate 112, and the second enclosure plate 113 can be integrally formed using a die-casting process, reducing assembly steps and improving production efficiency. It also allows for precise control of the shape and size of the heat dissipation channels, thereby optimizing heat dissipation performance. Specifically, the cold plate body 111 includes a cold plate substrate 1111 and a channel portion 1112. Along the thickness direction of the cold plate substrate 1111, the channel portion 1112 protrudes from at least one side relative to the cold plate substrate 1111 towards the cold plate substrate 1111, thereby forming the aforementioned heat dissipation channels within the channel portion 1112. In this embodiment, the heat dissipation channel 1112 protrudes towards the first sub-cavity 10a1, meaning the heat dissipation channel is mainly arranged in the portion of the cold plate body 111 that forms the first sub-cavity 10a1, and this portion also forms the second sub-cavity 10a2. Furthermore, the heat dissipation channel can also be arranged circumferentially around the first enclosure 112, effectively guiding heat dissipation from all directions of the first enclosure 112 and reducing heat accumulation in local areas. Since the drive board 21 typically contains high-power electronic components, such as power conversion modules and drive modules, these components generate a large amount of heat during operation. Therefore, the heat dissipation requirement of the first sub-cavity 10a1 is relatively high. Although the filter board 22 in the second sub-cavity 10a2 also generates heat, its heat dissipation requirement is relatively lower than that of the drive board 21. Therefore, the second sub-cavity 10a2 and the first sub-cavity 10a1 share a heat dissipation channel, which can effectively utilize heat dissipation resources. While the main control board 31 and main control power board 32 inside the second cavity 10b also generate heat during operation, their heat dissipation requirements are relatively low. Therefore, the heat dissipation requirements of the second cavity 10b are not high, and the efficiency of radiative heat dissipation can be increased by coating the inner surface of the second cavity 10b with a coating of high emissivity.

[0191] Please continue reading. Figure 8 In some embodiments, the cold plate body 111 has a heat dissipation protrusion 1113, which is located in the flow channel portion 1112, meaning that part of the heat dissipation flow channel is located inside the heat dissipation protrusion 1113. The heat dissipation protrusion 1113 protrudes towards the side facing the first sub-cavity 10a1. It should be noted that the cross-sectional area of ​​the heat dissipation flow channel located inside the heat dissipation protrusion 1113 is larger than the cross-sectional area of ​​the heat dissipation flow channel located outside the heat dissipation protrusion 1113. Furthermore, a heat-conducting surface 1113a is formed on the side of the heat dissipation protrusion 1113 facing the first cover 121. The electrical control box 100 also includes a fan drive and a compressor drive. The main function of the fan drive is to control the operation of the fan in the HVAC equipment. It receives instructions from the main control board 31 to adjust the fan speed and operating status, thereby controlling the airflow. The main function of the compressor drive is to control the operation of the compressor in the HVAC equipment. The compressor is a core component of the refrigeration or heating system, transferring heat by compressing the refrigerant.

[0192] The fan drive and compressor drive are both connected to the drive plate 21 and attached to the heat-conducting surface 1113a. That is, the fan drive and compressor drive are located between the heat dissipation boss 1113 and the drive plate 21. Since the fan drive and compressor drive will generate a lot of heat during operation, the heat generated by the fan drive and compressor drive can be quickly carried away by the heat exchange medium in the heat dissipation channel, avoiding performance degradation caused by heat accumulation.

[0193] Furthermore, the heat dissipation structure 11 also includes a flow channel connector 120, which communicates with the heat dissipation flow channel. The flow channel connector 120 can guide the cooling medium (such as coolant or air) to enter and exit the heat dissipation flow channel more efficiently. The flow channel connector 120 is arranged circumferentially along the first enclosure plate 112, and the flow channel structure and the first enclosure plate 112 are an integral structure, making the heat dissipation structure 11 more compact, reducing external connecting parts, and lowering installation difficulty and maintenance costs.

[0194] like Figure 6 and Figure 19 As shown, to improve the sealing effect between the first cover 121 and the first enclosure 112, in some embodiments, the electrical control box 100 further includes a first sealing element 97. The inner wall surface of the first enclosure 112 forms a mating inner circumferential surface 112a. The first sealing element 97 is disposed on the first cover 121 and can be fitted onto the first cover 121 so that the first sealing element 97 does not fall out of the preset position. The first sealing element 97 presses against the mating inner circumferential surface 112a, that is, the first sealing element 97 fits tightly with the mating inner circumferential surface 112a of the first enclosure 112 through elastic deformation, forming a good sealing effect and further improving the overall sealing performance of the first sub-cavity 10a1. Understandably, the formation of the first sealing element 97 is adapted to the shape of the first enclosure 112. For example, when the first enclosure 112 is roughly square, the first sealing element 97 is set as a square sealing ring so that the first sealing element 97 fits more closely with the inner wall surface of the first enclosure 112.

[0195] like Figure 20 , Figure 21 ,and Figure 22 As shown, in some embodiments, the first cover 121 includes a cover body 1211 and a cover flange 1212 connected together. The cover body 1211 is used to form part of the cavity wall of the first sub-cavity 10a1, and the cover body 1211 is in contact with the first enclosure 112. The cover flange 1212 is located in the first sub-cavity 10a1. The first sealing member 97 is installed on the cover flange 1212, and the cover flange 1212 provides good support and positioning for the sealing member, which facilitates quick installation.

[0196] The cover body 1211 includes a cover portion 1211a and a flange portion 1211b connected together. The cover portion 1211a is used to form part of the cavity wall of the first sub-cavity 10a1. The cover portion 1211a has a portion that is generally parallel to the cold plate body 111 and a portion that is generally perpendicular to the cold plate body 111. The flange portion 1211b is connected to the end of the cover portion 1211a, that is, the portion that is perpendicular to the cold plate body 111, and extends in the left and right direction of the main box body 10. The cover flange 1212 is connected to the connection between the cover portion 1211a and the flange portion 1211b. The first enclosure 112 includes an enclosure body 1121 and an enclosure flange 1122 connected to the outside of the enclosure body 1121. The cover flange 1212 passes through the enclosure body 1121 so that the flange portion 1211b abuts against the enclosure flange 1122.

[0197] The cover flange 1212 includes an extension 1212a and a stop 1212b connected together. The extension 1212a is arranged approximately parallel to the main body 1121 of the enclosure, while the stop 1212b is arranged at an angle to the extension 1212a. The stop 1212b extends from the position connected to the extension 1212a toward the main body 1121 of the enclosure, and a limiting space is defined between the stop 1212b, the extension 1212a, and the main body 1121 of the enclosure. The first sealing member 97 is disposed in the limiting space, and the stop 1212b can prevent the first sealing member 97 from disengaging from the limiting space along the thickness direction of the main box 10.

[0198] like Figure 20 , Figure 21 ,and Figure 22 As shown, in some embodiments, the first seal 97 includes a sealing body 971 and a sealing lip 972. The sealing body 971 is mounted on the cover flange 1212. The sealing body 971 provides stable support for the first seal 97, ensuring that the first seal 97 maintains a preset position during use and will not shift due to vibration or external force. A sealing lip 972 is provided on the side of the sealing body 971 facing the mating inner circumferential surface 112a. The sealing lip 972 can be provided in multiple rings. The multiple rings of sealing lips 972 are arranged on the sealing body 971 along the thickness direction of the main box 10, and the sealing lips 972 press against the mating inner circumferential surface 112a. The design of the sealing lip 972 can closely fit the inner circumferential surface of the first enclosure 112, block the gap between the enclosure body 1121 and the cover flange 1212, form a more effective sealing barrier, and prevent dust, moisture and other pollutants from entering the first sub-cavity 10a1. The sealing lip 972 can adapt to the unevenness of the surface of the first enclosure 112 and produce corresponding elastic deformation to improve the sealing effect.

[0199] like Figure 20 , Figure 21 ,and Figure 22As shown, the sealing lip 972 extends obliquely from the sealing body 971 toward the side where the cover body 1211 is located, that is, the sealing lip 972 is obliquely inclined away from the cold plate body 111. When the sealing lip 972 is obliquely inclined toward the cover body 1211, it can effectively guide the inflowing water along the inclined surface of the sealing lip 972 to the outside, instead of entering and flowing into the first sub-cavity 10a1. If the sealing lip 972 is obliquely inclined toward the cold plate body 111, it may cause water to accumulate between the cover flange and the first enclosure 112, and guide the inflowing water toward the cold plate body 111. Therefore, obliquely inclining the sealing lip 972 toward the cover body 1211 is a more reasonable structural design, which can effectively prevent water from entering the first sub-cavity 10a1 and protect the internal components inside the first sub-cavity 10a1.

[0200] In some embodiments, at least one side of the upper and lower ends of the flange 1211b can be securely connected to the flange 1122 of the surrounding plate by means of a screw. The tightening action of the screw can ensure that the flange 1211b and the flange 1122 of the surrounding plate are tightly fitted, further enhancing the sealing performance and ensuring that the first seal 97 is properly pressed during installation.

[0201] In one configuration, the lower side of the flange 1211b is connected to the flange 1122 of the surrounding plate by means of fastening screws. The heat dissipation structure 11 also includes a support base, which can be connected to the cold plate body 111 and protrudes towards the side of the first cover 121. The upper side of the flange 1211b is rotatably connected to the support base. When maintenance personnel need to inspect the first sub-cavity 10a1, they can remove the screws on the lower side of the flange 1211b and then flip the flange 1211b to expose the internal drive plate 21, which reduces the steps of disassembly and reinstallation and improves maintenance efficiency.

[0202] Specifically, a rotating shaft is provided on the upper side of the flange 1211b, and a plug-in hole is provided on the support base. The two ends of the rotating shaft pass through the plug-in hole so that the first cover 121 is rotatably connected to the support base. Furthermore, the electrical control box 100 also includes a damping element, which is sleeved on the rotating shaft and located between the outer wall of the rotating shaft and the inner wall of the plug-in hole. When the rotating shaft rotates in the plug-in hole, the damping element provides a certain resistance, allowing the first cover 121 to be suspended at any angle, so that maintenance personnel do not need assistance from others when performing maintenance, facilitating the maintenance work.

[0203] like Figure 23 , Figure 24 and Figure 25As shown, to improve the sealing effect between the third cover 123 and the second enclosure 113, in some embodiments, a first notch 113a is formed on the side of the second enclosure 113 facing the third cover 123. The first notch 113a connects the outside to the second cavity 10b. The electrical control box 100 also includes a second sealing element 98, which is installed in and covers the first notch 113a. The second sealing element 98 can reduce the entry of external moisture, dust and other impurities into the second cavity 10b. The second seal 98 presses against the second enclosure 113 to connect the second seal 98 to the second enclosure 113. The second seal 98 has a wiring groove 982a or a wiring hole. One end of the communication line is connected to the main control module 30, and the other end of the communication line is guided out of the second cavity 10b by the wiring groove 982a or the wiring hole. The wiring groove 982a or the wiring hole provides a clear guide path for the communication line, so that the communication line can be neatly and orderly led out from the inside of the second cavity 10b. The neat arrangement of the communication line makes subsequent maintenance and inspection more convenient.

[0204] like Figure 23 , Figure 24 and Figure 25 As shown, specifically, the second seal 98 includes an integrally constructed sealing body 981 and a wire-passing portion 982. The sealing body 981 is located closer to the second enclosure 113 than the wire-passing portion 982. The sealing body 981 has a slot 981a that engages with the second enclosure 113, allowing the sealing body 981 to be inserted into the second enclosure 113. Therefore, the second seal 98 can be tightly connected to the second enclosure 113. The wire-passing portion 982 has the aforementioned wiring groove 982a or wiring hole. The wire-passing portion 982 is located on the side near the third cover 123, so that maintenance personnel can directly access the communication cable passing through the wire-passing portion 982 after removing the third cover 123, facilitating maintenance work.

[0205] Furthermore, the slot 981a has a first groove wall and a second groove wall arranged opposite to each other. The first groove wall is located inside the second cavity 10b and is in close contact with the inner wall surface of the second enclosure 113, while the second groove wall is located outside the second cavity 10b and is in contact with the outer wall surface of the second enclosure 113. The relative arrangement of the first groove wall and the second groove wall forms a clamping space, which can firmly fix the second seal 98 on the second enclosure 113 and prevent it from loosening or shifting during use.

[0206] In some embodiments, the second seal 98 is made of an elastic material, such as rubber or silicone, to accommodate communication cables of different thicknesses. A wiring groove 982a is provided on the cable guide 982, with its opening facing the third cover 123 and extending vertically through the cable. A limiting hole 982b is formed on the bottom wall of the wiring groove 982a to limit the communication cable's movement. The communication cable can be squeezed into the wiring groove 982a, allowing the opposite sides of the wiring groove 982a to deform according to the diameter of the communication cable. The wiring groove 982a can also guide the communication cable to finally be placed into the limiting hole 982b.

[0207] The diameter of the limiting hole 982b is larger than the width of the wiring groove 982a, which can reduce the communication line passing through the limiting hole 982b from moving out through the wiring groove 982a, and ensure that the communication line always stays in the correct position during use.

[0208] Furthermore, the cable guide section 982 is provided with multiple spaced wiring slots 982a, which are arranged sequentially along the left and right direction of the cable guide section 982. This avoids entanglement and confusion between multiple communication lines, making the wiring process more orderly. It can also effectively isolate different communication lines, reduce electromagnetic interference between signals, and improve the quality of signal transmission.

[0209] like Figure 23 and Figure 26 As shown, in some embodiments, the electrical control box 100 also includes a main control connection line and a cable bridge 50. The main control connection line extends from the first cavity 10a to the second cavity 10b to electrically connect the main control module 30 and the frequency converter drive module 20. It can be seen that the main control connection line is responsible for transmitting control signals and data to ensure that the main control module 30 can accurately control and adjust the frequency converter drive module 20.

[0210] The cable bridge 50 is installed within the first sub-cavity 10a1, and some of the main control connection lines are arranged in the cable bridge 50. The cable bridge 50 is used to support and guide the arrangement of the main control connection lines. The cable bridge 50 not only provides support for the main control connection lines, but also plays a role in protecting and reducing line clutter.

[0211] like Figure 23 and Figure 26As shown, in some embodiments, the cable bridge 50 has a first cable routing channel 51a and a second cable routing channel 52a that are relatively independently configured. These independently configured channels can effectively separate different types of main control connection cables. This makes the arrangement of the main control connection cables within the electrical control box 100 more organized and orderly, reducing wiring clutter and improving the overall neatness of the electrical control box 100. Furthermore, the design of the first cable routing channel 51a and the second cable routing channel 52a can reduce the number of cable routing holes required on the electrical control box 100, thereby reducing the manufacturing cost of the electrical control box 100.

[0212] The main control connection includes power supply lines and signal lines. Power supply lines typically carry a larger current and are classified as high-voltage, while signal lines typically carry a smaller current and are classified as low-voltage. The portion of the power supply line within the first sub-cavity 10a1 is arranged in the first wiring channel 51a, and the portion of the signal line within the first sub-cavity 10a1 is arranged in the second wiring channel 52a. This separation of high-voltage and low-voltage signals effectively reduces electromagnetic interference from high-voltage signals to low-voltage signals, improving the stability and reliability of signal transmission. This separation helps reduce electromagnetic interference and improves the electromagnetic compatibility of the control box 100, enabling it to operate stably in various electromagnetic environments. Furthermore, the separate first wiring channel 51a and second wiring channel 52a facilitates cable maintenance or replacement, allowing for individual handling of either the power supply or signal line without affecting the other. The independent first and second wiring channels 51a and 52a also simplify maintenance and repair of the power supply and signal lines, reducing difficulties caused by cross-connections.

[0213] like Figure 23 and Figure 26 As shown, in some embodiments, the cable bridge 50 includes a first bracket 51 and a second bracket 52. The first bracket 51 has a first cable routing channel 51a for arranging power supply lines. The first bracket 51 can reduce the power supply lines from deviating from the preset wiring path due to vibration or other external forces. The first bracket 51 is located in the middle of the first sub-cavity 10a1, spans the side of the drive board 21 near the third circuit module facing away from the second sub-cavity 10a2, and extends from the position of the corresponding power connection structure 95 on the drive board 21 toward the third circuit module, that is, toward the second cavity 10b. This ensures that the path of the power supply lines is clear and fixed, making the arrangement of the power supply lines in the control box 100 more neat and orderly, reducing interference between the power supply lines and other components, reducing the problem of messy wiring, and improving the cleanliness inside the control box 100.

[0214] The second bracket 52 has the aforementioned second wiring channel 52a formed inside, which is used to arrange signal lines. The second bracket 52 can reduce the signal lines from deviating from the preset wiring path due to vibration or other external forces. The second bracket 52 extends along the gap between the edge of the drive board 21 and the heat dissipation structure 11 and the gap between the two drive boards 21. One end of the second bracket 52 extends towards the second cavity 10b, making full use of the space inside the control box 100, ensuring that the path of the signal lines is clear and fixed, reducing interference between the signal lines and other components, reducing the problem of messy wiring, and improving the cleanliness inside the control box 100.

[0215] The first bracket 51 and the second bracket 52 can be made of insulating materials, such as ABS plastic or rubber, to ensure electrical safety. The power supply lines and signal lines are arranged relatively independently in the first bracket 51 and the second bracket 52. This separation design effectively reduces electromagnetic interference from high-voltage to low-voltage signals. The paths of the power supply lines (high-voltage) and signal lines (low-voltage) within the control box 100 are clearly distinguished, avoiding signal interference caused by line crossings and improving the stability and reliability of signal transmission. The independent design of the first bracket 51 and the second bracket 52 makes the maintenance and repair of the power supply lines and signal lines more convenient. Maintenance personnel can quickly identify and operate specific lines, reducing the difficulties in maintenance caused by line crossings.

[0216] like Figure 23 and Figure 26 As shown, in some embodiments, the first bracket 51 is connected to the second bracket 52. Specifically, the end of the first bracket 51 facing away from the second cavity 10b is connected to the end of the second bracket 52 facing away from the second cavity 10b, making the entire cable bridge 50 structure more stable and reducing loosening caused by vibration or other external forces. The first bracket 51 and the second bracket 52 can be integrally formed, reducing assembly difficulty. Integral forming reduces the number of connection points between the first bracket 51 and the second bracket 52, thereby reducing potential points of failure and the risk of loosening due to vibration or other external forces.

[0217] like Figure 23 and Figure 26As shown, the second bracket 52 is also provided with elastic buckles 522 for engaging with the drive plate 21. Specifically, the second bracket 52 includes a wiring section 521 and a plurality of elastic buckles 522 connected to the wiring section 521. The wiring section 521 extends along the gap between the edge of the drive plate 21 and the heat dissipation structure 11 and the gap between the two drive plates 21, and has a second wiring channel 52a. The plurality of elastic buckles 522 are arranged at intervals along the extension direction of the wiring section 521. The elastic buckles 522 are connected to the side of the wiring section 521 away from the first cover 121 and extend toward the drive plate 21. Through the engagement of the elastic buckles 522 with the drive plate 21, the second bracket 52 can be provided with stable support, and the installation and disassembly of the second bracket 52 can be completed quickly. The wiring section 521 located between the two drive boards 21 is provided with elastic buckles 522 on both sides facing the two drive boards 21. The elastic buckles 522 can provide a stable connection force to ensure that the drive boards 21 will not loosen due to vibration or other external forces during operation.

[0218] The second bracket 52 also includes a wire clamping part 523, which is connected to the wiring part 521 and is spaced apart from the bottom wall of the second wiring channel 52a. Understandably, the signal line is disposed between the wire clamping part 523 and the bottom wall of the second wiring channel 52a. The main function of the wire clamping part 523 is to fix the signal line, ensure that the signal line is stably arranged in the second wiring channel 52a, and prevent the signal line from loosening due to vibration or other external forces during operation.

[0219] In some embodiments, the first bracket 51 may not be provided. Specifically, the heat dissipation structure 11 is also provided with a second opening (not shown in the figure). The second opening connects the first sub-cavity 10a1 and the second sub-cavity 10a2 and is located on the side of the second sub-cavity 10a2 near the second cavity 10b. That is, the second opening is located above the power connection structure 95 and is covered by the second cover 122, making full use of the space inside the electrical control box 100.

[0220] The power supply line of the main control connection enters the first sub-cavity 10a1 from the second sub-cavity 10a2 through the second opening, and then extends into the second cavity 10b to electrically connect the main control power board 32 and the filter board 22. The design of the second opening allows the power supply line to enter the first sub-cavity 10a1 directly from the second sub-cavity 10a2 without the need for additional support from the first bracket 51, thus making more efficient use of the internal space of the control box 100. The signal line in the main control connection extends from the first sub-cavity 10a1 into the second cavity 10b to electrically connect the main control board 31 and the drive board 21.

[0221] In this embodiment, since the first bracket 51 is not provided, the number of parts can be reduced, the manufacturing cost can be lowered, and the overall structure of the electrical control box 100 can be made simpler, making it easier to produce and maintain.

[0222] like Figure 6 As shown, in some embodiments, the main control module 30 is disposed within the second cavity 10b, specifically including a main control power board 32 and a main control board 31 electrically connected. The main control power board 32 is responsible for providing a stable power supply to the main control module 30. It can monitor and adjust parameters such as current, voltage, and power to ensure stable power output. The main control board 31 is the control center of the electrical control box 100, responsible for directing and controlling the operation of various components, processing and transmitting control signals, and realizing precise control of other components.

[0223] like Figure 6 As shown, both the main control board 31 and the main power supply board 32 are housed within the second cavity 10b and are arranged at intervals along the thickness direction of the main housing 10. This helps reduce the impact of electromagnetic interference generated by the main power supply board 32 on sensitive signals on the main control board 31, improving the stability and accuracy of signal processing. Furthermore, the main control board 31 is located on the side of the main power supply board 32 facing the third housing cover 123. Because the main control board 31 is positioned closer to the third housing cover 123, it is easier for maintenance personnel to directly open the third housing cover 123 for operation when maintenance or replacement of the main control board 31 is required, without needing to reach into the main housing 10, thus saving maintenance time.

[0224] The power supply line connects to the main control power board 32 to provide a stable power supply to the main control module 30. The signal line connects to the main control board 31 to transmit control signals and data. The separate layout of the main control board 31 and the main control power board 32 allows the power supply line and signal line to be connected more directly to their respective target boards, reducing interference between the power supply line and the signal line, simplifying internal wiring, and reducing cable length and complexity.

[0225] like Figure 6 and Figure 7 As shown, in some embodiments, the first enclosure 112 is provided with a fan wiring section 91 and a compressor wiring section 92. The fan wiring section 91 is used to connect the power supply and signal lines for controlling the fan, ensuring that the fan can operate normally according to system requirements. The compressor wiring section 92 is used to connect the power supply and control signal lines for the compressor, ensuring that the compressor can operate normally according to system requirements. The fan wiring section 91 and the compressor wiring section 92 are located on at least one side of the wall on opposite sides of the first enclosure 112. Since both the fan wiring section 91 and the compressor wiring section 92 need to be connected to the drive plate 21 in the first sub-cavity 10a1, it is more convenient to connect the fan wiring section 91 and the compressor wiring section 92 to the filter plate 22 by setting them on opposite sides of the first enclosure 112.

[0226] In this embodiment, the first enclosure 112 has left and right sides arranged opposite to each other in the left and right direction. The fan wiring part 91 and the compressor wiring part 92 are arranged on the wall in the left and right direction of the first enclosure 112, which makes full use of the space on the left and right sides of the first enclosure 112, avoids the space waste caused by the centralized arrangement of the fan wiring part 91 and the compressor wiring part 92, and improves the overall space utilization of the electrical control box 100.

[0227] Specifically, the drive board 21 is equipped with a fan interface and a compressor interface, and the fan wiring section 91 is equipped with a wiring section interface. The wiring section interface is electrically connected to the fan interface via a wire, and the compressor wire passes through the compressor wiring section 92 and is electrically connected to the compressor interface on the drive board. By setting the fan interface and compressor interface on the drive board 21 and connecting them to the fan wiring section 91 via the wiring section interface, and to the compressor wire via the compressor wiring section 92, modular electrical connections are achieved. This modular design simplifies the installation process, allowing maintenance personnel to quickly identify and connect various components, reducing the complexity of on-site wiring and the probability of errors. Furthermore, the modular interface design reduces the exposed length of wires and the number of connection points, lowering the risk of failure due to loose wires or poor contact, and improving the overall reliability of the system.

[0228] Furthermore, the fan wiring section 91 and the compressor wiring section 92 are arranged vertically, and both are adjacent to the second wiring channel 52a inside the main box 10, which optimizes the wiring path and reduces the wiring length. This fully utilizes the space on the side wall of the main box 10, making the layout of the entire electrical control box 100 more reasonable and avoiding messy wiring.

[0229] Since the fan wiring section 91 and the compressor wiring section 92 are located on the side wall of the first enclosure 112, rather than on the first cover 121, there will be no interference with the fan wiring section 91 and the compressor wiring section 92 when the first cover 121 is removed to repair the filter board 22. Interference with the external power line connected to the bottom power terminal 70 can also be avoided.

[0230] like Figure 6 and Figure 7As shown, it should be noted that there are two sets of fan wiring sections 91 and compressor wiring sections 92, and two drive boards 21 are also provided. Each drive board 21 is connected to one set of fan wiring sections 91 and compressor wiring sections 92. The main housing 10 has a width direction. The fan wiring sections 91 and compressor wiring sections 92 corresponding to one drive board 21 are located on one side wall of the first enclosure 112 along the width direction, and the fan wiring sections 91 and compressor wiring sections 92 corresponding to the other drive board 21 are located on the other side wall of the first enclosure 112 along the width direction. Each set of fan wiring sections 91, compressor wiring sections 92 and corresponding drive boards 21 are relatively independent. When one set fails, it will not affect the normal operation of the other set, which facilitates quick location and repair of the fault.

[0231] Furthermore, distributing the two sets of fan wiring sections 91 and compressor wiring sections 92 on both sides of the first enclosure 112 helps to disperse heat. This layout avoids heat concentration, thereby improving the heat dissipation performance of the electrical control box 100 and extending the lifespan of electronic components. It also makes the internal wiring partitions of the electrical control box 100 clearer. When maintenance or repair is required, technicians can quickly locate the corresponding fan wiring section 91, compressor wiring section 92, and drive board 21, reducing the time spent searching for wiring and improving maintenance efficiency.

[0232] Specifically, a set of fan wiring terminals 91 and compressor wiring terminals 92 are provided on both sides of the left and right walls of the first enclosure 112. The fan wiring terminal 91 and compressor wiring terminal corresponding to one drive plate 21 are located on the left wall of the first enclosure 112, and the fan wiring terminal 91 and compressor wiring terminal 92 corresponding to the other drive plate 21 are located on the right wall of the first enclosure 112. This makes full use of the space on both sides of the first enclosure 112, avoids the space waste caused by centralized wiring, and makes the internal layout of the electrical control box 100 more compact. Moreover, the fan wiring terminal 91 is configured to connect two fans, and the compressor wiring terminal 92 is configured to connect one compressor, that is, a total of four fans and two compressors can be connected on both sides, which improves the expandability of the HVAC equipment and can meet the needs of different application scenarios for the number of fans and compressors.

[0233] like Figure 27 and Figure 28As shown, the cold plate body 111 further includes a blocking groove 111a, which can be formed circumferentially on the cavity wall of the first sub-cavity 10a1. The cavity wall of the first sub-cavity 10a1 refers to the cavity wall portion partially formed by the cold plate body 111. The blocking groove 111a can be located between the heat dissipation channel and the fan wiring portion 91 and / or the compressor wiring portion 92, or between the heat dissipation channel and the power terminal 70. Understandably, during operation of the electrical control box 100 of this application, the coolant flowing through the heat dissipation channel can quickly remove the heat conducted to the cold plate body 111, resulting in high heat dissipation efficiency. In practical applications, the refrigerant of the air conditioning system can be used as the coolant, and a refrigerant bypass can be set aside as the cooling flow path. In this way, the temperature of the cold plate body 111 will be relatively low. By forming a sealed cavity, this application can greatly reduce the entry of external water vapor into the cavities where the circuit boards are located, so as to avoid the possibility of condensation forming in the sealed cavity as much as possible. This can improve the reliability of the electrical control box 100 during operation. By setting the blocking groove 111a, the transfer of cold energy to the fan wiring section 91, compressor wiring section 92 and power terminal 70 can be reduced, thereby reducing the possibility of condensation in the fan wiring section 91, compressor wiring section 92 and power terminal 70 due to low temperature. This can further improve the safety of the electrical control box 100.

[0234] like Figure 7 and Figure 29 As shown, in some embodiments, the filter board 22 further includes a common-mode inductor 222, and the control box 100 further includes a reactance 991. Both the common-mode inductor 222 and the reactance 991 are disposed within the second sub-cavity 10a2. The common-mode inductor 222 is used to suppress common-mode noise in the circuit, ensuring the stability and reliability of signal transmission, while the reactance 991 is used to adjust the impedance characteristics of the circuit and optimize the circuit performance. Specifically, the common-mode inductor 222 is disposed on the second substrate 221 and located between the cold plate body 111 and the second substrate 221. The common-mode inductor 222 can be fixed to the cold plate body 111 by potting glue to ensure that the common-mode inductor 222 will not shift due to vibration or external force during use. The reactor 991 is installed on the main body 111 of the cold plate and is located on the outside of the filter plate 22, spaced apart from the filter plate 22. Since the reactor 991 will generate a magnetic field when it is running, placing the reactor 991 on the outside of the filter plate 22 can prevent the magnetic field generated by the reactor 991 from interfering with the normal operation of the filter plate 22.

[0235] In this embodiment, two reactors 991 are provided. One reactor 991 is located on one side of the filter plate 22 in the left-right direction, and the other reactor 991 is located on one side of the filter plate 22 in the up-down direction. Both reactors 991 are connected to the cold plate body 111, which can increase the contact area between the reactor 991 and the cold plate body 111, thereby more effectively conducting heat to the cold plate body 111.

[0236] 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.

[0237] 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 main box body has a first cavity and a second cavity, which are spaced apart. A wire groove is provided between the second cavity and the first cavity. The main control module is disposed in the second cavity, and the communication line connected to the main control module extends into the second cavity through the cable tray; The variable frequency drive module is disposed within the first cavity and is electrically connected to the main control module; and A power connector is used to connect an external power cord. The power connector is installed in the main housing and electrically connected to the frequency converter drive module. The power connector and the cable tray are located on different sides of the first cavity.

2. The electrical control box as described in claim 1, characterized in that, The power terminal block is located on the side of the first cavity away from the second cavity, and is disposed on opposite sides of the first cavity, opposite to the wire channel.

3. The electrical control box as described in claim 2, characterized in that, The main housing has a length direction, and the main control module, the frequency conversion drive module, and the power terminal are arranged sequentially along the length direction.

4. The electrical control box as described in claim 2, characterized in that, It also includes a central module and a central housing. The central housing is set independently from the main housing. The central module is located in the central housing. The communication line includes a central communication line, which is connected to the central module. The central communication line is electrically connected to the central interface on the main control module via the cable tray.

5. The electrical control box as described in claim 4, characterized in that, The wire-passing groove extends through the opposite sides of the main box along its extension direction to form a first wire-passing opening and a second wire-passing opening; The communication line also includes a peripheral communication line corresponding to an external device. The peripheral communication line enters the cable tray via the first cable port and is electrically connected to the peripheral interface on the main control module. The central communication line enters the cable tray via the second cable port and is electrically connected to the central interface.

6. The electrical control box as described in any one of claims 1 to 5, characterized in that, The main box includes a lid and a heat dissipation structure. The lid and the heat dissipation structure are sealed together to form the first cavity and the second cavity.

7. The electrical control box as described in claim 6, characterized in that, The first cavity includes a first sub-cavity and a second sub-cavity arranged at intervals along the thickness direction of the main housing, and the first sub-cavity and the second cavity are located on the same side of the heat dissipation structure; The frequency conversion drive module includes a drive board and a filter board. The drive board is disposed in the first sub-cavity, and the filter board is disposed in the second sub-cavity. The power terminal extends into the second sub-cavity and is electrically connected to the filter board.

8. The electrical control box as described in claim 7, characterized in that, The heat dissipation structure is provided with an installation port that connects to the second sub-cavity. The installation port is located on the side of the first sub-cavity away from the second cavity. The power terminal is installed at the installation port and is partially exposed on the side of the heat dissipation structure facing away from the second sub-cavity.

9. The electrical control box as described in claim 8, characterized in that, The projections of the first sub-cavity and the second sub-cavity along the thickness direction of the main box body overlap. The first sub-cavity has a first edge disposed away from the second cavity body, and the second sub-cavity has a second edge disposed away from the second cavity body. The second edge is disposed further away from the second cavity body than the first edge. The mounting port is located between the first edge and the second edge.

10. The electrical control box as described in claim 8, characterized in that, The power connector includes an insulating base and a conductive post. The insulating base is connected to the heat dissipation structure and seals the mounting port. The conductive post passes through the insulating base, and one end of the conductive post extends into the second sub-cavity and is connected to the filter plate. The other end of the conductive post is exposed on the surface of the insulating base facing away from the second sub-cavity.

11. The electrical control box as described in claim 10, characterized in that, The insulating base includes an insulating body and a connecting flange protruding from the outer wall of the insulating body. The insulating body extends into the second sub-cavity, and the conductive post passes through the insulating body. The heat dissipation structure has a limiting groove surrounding the mounting port on one side of the second sub-cavity. The connecting flange is embedded in the limiting groove and connected to the heat dissipation structure.

12. The electrical control box as described in claim 7, characterized in that, The heat dissipation structure includes an integrally formed cold plate body, a first enclosure plate, and a second enclosure plate. The cold plate body is plate-shaped and has heat dissipation channels. The box cover includes a first box cover, a second box cover, and a third box cover. The cold plate body includes a first side and a second side. The first box cover and the second box cover are respectively disposed on the first side and the second side of the cold plate body. The first box cover, the first enclosure plate and the first side of the cold plate body cooperate to form the first sub-cavity. The second box cover cooperates with the second side of the cold plate body to form the second sub-cavity. The third box cover cooperates with the second enclosure plate and the first side of the cold plate body to form the second cavity.

13. The electrical control box as described in claim 12, characterized in that, It also includes a main control connection line and a cable bridge. The main control connection line extends from the first cavity to the second cavity to electrically connect the main control module and the frequency conversion drive module. The cable bridge is disposed in the first sub-cavity, and part of the main control connection line is arranged in the cable bridge.

14. The electrical control box as described in claim 13, characterized in that, The cable bridge has a first cable routing channel and a second cable routing channel that are relatively independently configured; the main control connection line includes a power supply line and a signal line, wherein the portion of the power supply line located in the first sub-cavity is arranged in the first cable routing channel, and the portion of the signal line located in the first sub-cavity is arranged in the second cable routing channel.

15. The electrical control box as described in claim 13, characterized in that, The main control module includes a main control power board and a main control board that are electrically connected. The main control board is located on the side of the main control power board facing the third cover. The main control connection line includes a power supply line and a signal line. The power supply line is connected to the main control power board, and the signal line is connected to the main control board.

16. The electrical control box as described in claim 12, characterized in that, The cold plate body is provided with a second opening, which connects the first sub-cavity and the second sub-cavity and is located on the side of the second sub-cavity close to the second cavity body; The electrical control box also includes a main control connection line, and the main control module includes a main control power board and a main control board that are electrically connected; wherein, the power supply line in the main control connection line enters the first sub-cavity through the second opening from the second sub-cavity, and then extends into the second cavity to electrically connect the main control power board and the filter board, and the signal line in the main control connection line extends into the second cavity through the first sub-cavity to electrically connect the main control board and the drive board.

17. The electrical control box as described in claim 12, characterized in that, A third enclosure is also formed on the second side of the cold plate body, and the second box cover is closed on the third enclosure to form the second sub-cavity.

18. The electrical control box as described in claim 12, characterized in that, The drive board is provided with a fan interface and a compressor interface. The first enclosure is provided with a fan wiring section and a compressor wiring section. The fan wiring section is provided with a wiring section interface. The wiring section interface is electrically connected to the fan interface via a wire. The compressor wiring section is used for the compressor wire to pass through. The compressor wire is also electrically connected to the compressor interface on the drive board.

19. The electrical control box as described in claim 18, characterized in that, The fan wiring section and the compressor wiring section are disposed on at least one side of the wall on opposite sides of the first enclosure.

20. The electrical control box as described in claim 19, characterized in that, Two drive boards are laid flat in the first sub-cavity, and the two drive boards are symmetrically arranged in the center. The main box has a width direction. The fan wiring section and compressor wiring section corresponding to one of the drive plates are located on one side wall of the first enclosure along the width direction, and the fan wiring section and compressor wiring section corresponding to the other drive plate are located on the other side wall of the first enclosure along the width direction.

21. The electrical control box according to claim 12, characterized in that, It also includes a first seal, wherein the inner wall surface of the first enclosure forms a mating inner circumferential surface; The first sealing element is disposed on the first box cover and presses against the inner peripheral surface of the mating joint.

22. The electrical control box according to claim 21, characterized in that, The first box cover includes a cover body and a cover flange connected together; The cover body is used to form part of the cavity wall of the first sub-cavity, and the cover body is in contact with the first enclosure plate, and the cover plate flange is located inside the first sub-cavity; The first sealing element is installed on the flange of the cover plate and presses against the inner circumferential surface of the mating joint.

23. The electrical control box according to claim 22, characterized in that, The first seal includes a sealing body and a sealing lip; The sealing body is installed on the flange of the cover plate, and the sealing lip is located on the side of the sealing body facing the inner circumferential surface of the mating joint, and the sealing lip abuts against the inner circumferential surface of the mating joint.

24. The electrical control box according to claim 23, characterized in that, The sealing lip extends obliquely from the sealing body toward the side where the cover body is located.

25. The electrical control box as described in any one of claims 7 to 24, characterized in that, It also includes a terminal block protective shell, which is connected to the heat dissipation structure and located on the side of the first sub-cavity away from the second cavity; The terminal block protective shell is provided with a protective cavity and a clearance opening communicating with the protective cavity. The part of the power terminal block exposed outside the main box extends into the protective cavity through the clearance opening.

26. The electrical control box as described in claim 25, characterized in that, The bottom of the terminal block protective housing is provided with a power cord outlet.

27. 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 26, wherein the electrical control box is disposed within the housing.

28. The HVAC equipment as described in claim 27, characterized in that, The housing is also provided with an inspection port; the electrical control box is located at the inspection port, wherein the power terminal is arranged facing the inspection port.

29. The HVAC equipment as described in claim 28, characterized in that, The HVAC equipment includes a switching valve housed within a casing, and the central control box in the electrical control box is mounted on the switching valve.

30. The HVAC equipment as described in claim 29, characterized in that, The central housing is located on the rear side of the main housing, opposite to the inspection port.

31. The HVAC equipment as described in claim 27, characterized in that, The housing includes an outer shell and a chassis disposed at the bottom of the outer shell, the chassis being provided with a wire pass-through port opening upwards; The main box is located above the wiring port, and the power cord outlet on the electrical control box is positioned opposite the wiring port in the vertical direction.

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