Electrically controlled device and heating installation

Abstract

The application discloses an electric control device and a heating and ventilation equipment, and relates to the technical field of electric control devices, and aims to improve stability and safety.

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 device and HVAC equipment. Background Technology

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

[0003] As a key control component of HVAC equipment, the electrical control box typically integrates circuit modules such as the main control module, frequency converter drive module, and central module to control the operation of components in the HVAC equipment (such as compressors and fans).

[0004] However, in related technologies, in order to save space, these circuit modules are usually placed in the same cavity of the control box. This design leads to serious electromagnetic interference between modules, which greatly reduces the system stability of the control box. Utility Model Content

[0005] This application provides an electrical control device and a heating and ventilation system, which aims to improve the system stability of the electrical control device.

[0006] To achieve the above objectives, a first aspect of this application provides an electronic control device, comprising:

[0007] Variable frequency drive module;

[0008] The main control module is electrically connected to the frequency converter drive module;

[0009] The central module is electrically connected to the main control module;

[0010] A first electrical control box, comprising a box body and a heat dissipation structure, wherein the box body and the heat dissipation structure cooperate to form a sealed first cavity; and

[0011] The second electrical control box is set independently of the first electrical control box and has a second cavity;

[0012] The variable frequency drive module is installed in the first cavity, the central module is installed in the second cavity, and the main control module is installed in either the first cavity or the second cavity.

[0013] In some embodiments, the first cavity includes a first sub-cavity and a second sub-cavity, and the frequency conversion drive module includes a drive board and a filter board;

[0014] The housing includes a first cover and a second cover. The heat dissipation structure has a first side and a second side arranged opposite to each other. The first cover and the first side of the heat dissipation structure cooperate to form a sealed first sub-cavity. The second cover and the second side of the heat dissipation structure cooperate to form a sealed second sub-cavity. The drive board is installed in the first sub-cavity, the filter board is installed in the second sub-cavity, and the main control module is installed in either the first sub-cavity or the second sub-cavity.

[0015] In some embodiments, the main control module is mounted in the first sub-cavity, and the main control module and the drive board are arranged at intervals along the surface of the first side of the heat dissipation structure. In the direction from the first side to the second side, the drive board and the filter board at least partially overlap.

[0016] In some embodiments, the heat dissipation structure is provided with a first through hole, which connects the first sub-cavity and the second sub-cavity;

[0017] The electronic control device further includes a power connection structure, which passes through the first through hole, and the two ends of the power connection structure are respectively connected to the drive board and the filter board.

[0018] In some embodiments, the electronic control device further includes a power connector for connecting an external power supply line. The power connector is mounted on the heat dissipation structure and located on the side of the drive board away from the main control module. A portion of the power connector extends into the second sub-cavity and is electrically connected to the filter board.

[0019] In some embodiments, the heat dissipation structure is further provided with a second through hole communicating with the second sub-cavity;

[0020] The power connector includes an insulating base and a conductive post. The insulating base passes through the second through hole and seals the hole wall of the second through hole. The conductive post passes through the insulating base, with one end of the conductive post extending into the second sub-cavity and connecting to the filter plate, and the other end exposed on the surface of the insulating base facing away from the second sub-cavity.

[0021] In some embodiments, the heat dissipation structure has heat dissipation channels.

[0022] In some embodiments, the heat dissipation structure includes an integrated cold plate body and a surrounding plate, wherein the cold plate body is plate-shaped and provided with the heat dissipation channels;

[0023] The enclosure is connected to the side of the cold plate body facing away from the filter plate, and the first cover is sealed to the side of the enclosure away from the cold plate body to form the first sub-cavity.

[0024] In some embodiments, the frequency conversion drive module and the main control module are laid flat along the bottom of the first cavity.

[0025] Alternatively, the variable frequency drive module includes a drive board and a filter board, with the main control module and the filter board respectively arranged on opposite sides of the drive board.

[0026] In some embodiments, the main control module is installed in the second cavity, and the main control module and the central module are laid flat along the bottom of the second cavity.

[0027] In some embodiments, the main control module includes a main control power board and a main control board, the main control power board being electrically connected to the frequency converter drive module, and the main control board being electrically connected to the central module;

[0028] Along the depth direction of the second cavity, the main control power board is located below the main control board, and / or the main control board and the base plate of the central module are at the same height.

[0029] In some embodiments, both the first and second lids are provided with sealing grooves on the side facing the heat dissipation structure, or both the first and second sides of the heat dissipation structure are provided with sealing grooves.

[0030] The sealing groove is provided with a sealing element, and the first box cover and the second box cover are respectively fitted to the heat dissipation structure to seal the first sub-cavity and the second sub-cavity.

[0031] In some embodiments, a pressure balancing tank is provided in the first sub-cavity and / or the second sub-cavity.

[0032] A second aspect of this application provides a heating, ventilation, and air conditioning (HVAC) device, including a housing and an electrical control device as described above, wherein the electrical control device is disposed within the housing.

[0033] In some embodiments, the housing is provided with an access port, and the electronic control device is located at the access port, wherein the first electronic control box is disposed facing the access port.

[0034] In some embodiments, the HVAC equipment further includes a switching valve disposed within a housing, and the second electrical control box is mounted on the switching valve.

[0035] In some embodiments, the second electrical control box is located on the rear side of the first electrical control box, away from the access port.

[0036] In the electrical control device of this application, the second electrical control box is set independently of the first electrical control box. The frequency converter drive module is installed in the first cavity of the first electrical control box, and the central module is installed in the second cavity of the second electrical control box. The independent design of the first electrical control box and the second electrical control box forms a physical isolation barrier, which greatly reduces the impact of electromagnetic interference generated by the frequency converter drive module and ensures the stability of the electrical control device system operation.

[0037] Meanwhile, the main control module is installed in either the first or second cavity. When installed in the first cavity, the signal transmission distance between the main control module and the frequency converter drive module is shortened, reducing the impact of cable impedance and improving the drive signal response speed. When installed in the second cavity, the independent design of the second and first control boxes greatly avoids strong electromagnetic interference from the frequency converter drive module, ensuring that the main control module and the central module are in the same low-electromagnetic-interference environment, guaranteeing signal stability. Furthermore, the complete separation of high-voltage and low-voltage circuits avoids the risk of short circuits due to insulation failure (such as cable aging), improving system safety.

[0038] In addition, the heat dissipation structure can dissipate the heat generated by the frequency converter drive module in a timely manner, ensuring that the frequency converter drive module operates in a suitable temperature environment and extending the life of the electronic components inside the control box.

[0039] Furthermore, when the frequency converter drive module or the central module fails, the corresponding electrical control box can be disassembled separately for repair without the need for overall power outage troubleshooting, thus improving maintenance efficiency. Attached Figure Description

[0040] 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.

[0041] 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;

[0042] Figure 2 for Figure 1 A structural diagram from another angle of the structure;

[0043] Figure 3 This is a schematic diagram of the structure of an electronic control device according to an embodiment of this application;

[0044] Figure 4 This is a schematic diagram of the internal structure of an electronic control device according to an embodiment of this application;

[0045] Figure 5This is a schematic diagram of the internal structure of an electronic control device according to another embodiment of this application;

[0046] Figure 6 This is a schematic diagram of the internal structure of the first electrical control box in one embodiment of this application;

[0047] Figure 7 This is a schematic diagram of the structure of the cold plate body in one embodiment of this application.

[0048] Explanation of icon numbers:

[0049] 1. Electrical control device; 11. First electrical control box; 111. Box body; 1111. First box cover; 112. Heat dissipation structure; 1121. First through hole; 1122. Second through hole; 1123. Cold plate body; 1124. Enclosure; 12. Second electrical control box; 121. Box body; 122. Wiring structure; 13. Variable frequency drive module; 131. Drive board; 132. Filter board; 14. Central module; 1101. First cavity; 1102. First sub-cavity; 1103. Second sub-cavity; 1201. Second cavity; 15. Main control module; 151. Main control board; 2. Outdoor unit; 200. Housing; 200a. Inspection port; 300. Air supply fan.

[0050] 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

[0051] 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.

[0052] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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 and Figure 2 The diagram shows outdoor unit 2 of the air conditioning system. Outdoor unit 2 includes a casing 200 and a refrigeration unit, which is housed within the casing 200. The refrigeration unit includes a compressor, a switching valve, an outdoor heat exchanger, an outdoor expansion valve, and an oil separator, etc. These components are connected by refrigerant piping. Additionally, outdoor unit 2 is equipped with a blower fan 300.

[0058] Furthermore, the outdoor unit 2 also includes an electrical control device 1. 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 electric shock and other safety accidents. The electrical control device 1 is the core control component of the HVAC equipment. Installed inside the housing 200, it facilitates maintenance and replacement, and also streamlines the installation and layout of the overall HVAC structure. The electrical control device 1 is responsible for controlling the operation of the HVAC equipment. It is equipped with various circuit modules (such as a main control module, a frequency converter drive module, and a central module), which control the HVAC equipment's start-up, stop, temperature adjustment, and mode switching.

[0059] The housing 200 provides protection for the electronic components inside the electronic control device 1, preventing dust, moisture, oil, and other external impurities from entering. It also protects the electronic control device 1 from extreme environmental conditions (such as temperature, humidity, and chemical corrosion), ensuring normal operation in various environments and extending its service life. The electronic control device 1 contains high-voltage circuits and live components; housing them within the housing 200 prevents accidental contact by users, reduces the risk of electric shock, and improves safety. Furthermore, the housing 200 acts as a shield, reducing the impact of external electromagnetic interference on the electronic components inside the electronic control device 1 and ensuring the stability and reliability of the control system.

[0060] like Figure 1 and Figure 2 As shown, in this embodiment, the housing 200 is rectangular, and the electronic control device 1 includes a first electronic control box 11 and a second electronic control box 12 that are independent of each other. The first electronic control box 11 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 first electronic control box 11 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. It is also beneficial for heat dissipation and maintenance operations.

[0061] It should be noted that this application is not limited to the arrangement of the first electrical control box 11 along the height direction of the housing 200 in the above embodiments. In other embodiments, the length direction of the first electrical control box 11 may also be arranged along the length direction of the housing 200, or the length direction of the first electrical control box 11 may also be arranged along the width direction of the housing 200. Furthermore, the first electrical control box 11 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.

[0062] 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 electronic control device 1 is located within the air duct, so that the airflow within the air duct can carry away the heat generated by the electronic control device 1, ensuring the heat dissipation effect of the electronic control device 1.

[0063] Please continue reading. Figure 1 and Figure 2 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.

[0064] The electrical control device 1 is located at the access port 200a, and its first electrical control box 11, which is used to install the frequency converter drive module 13, is set facing the access port 200a. Maintenance personnel can quickly find the first electrical control box 11 without having to extend excessively into the housing 200 to operate, which greatly improves the efficiency of maintenance and repair.

[0065] The electronic control device 1 in this embodiment improves system stability and ease of use by setting up two boxes and a modular layout.

[0066] Specifically, please refer to Figure 3 , Figure 4 and Figure 5 The electrical control device 1 includes a main control module 15, a frequency conversion drive module 13, a central module 14, a first electrical control box 11, and a second electrical control box 12.

[0067] The first electrical control box 11 includes a box body 111 and a heat dissipation structure 112. The box body 111 and the heat dissipation structure 112 cooperate to form a sealed first cavity 1101, which is used to install the frequency converter drive module 13.

[0068] In this embodiment, the housing 111 can be made of metal (such as aluminum alloy or stainless steel) or insulating material. The heat dissipation structure 112 can be a plate-like structure, and can be a heat-conducting plate made of a material with good thermal conductivity, such as aluminum alloy or copper alloy. The heat dissipation structure 112 can also be designed with internal heat dissipation channels. The heat dissipation channels can be straight or curved, used to guide the flow of the heat exchange medium, such as air or liquid, i.e., to remove heat through air cooling or water cooling. The heat dissipation structure 112 is sealed to the housing 111 to form a sealed first cavity 1101. The sealing connection can be achieved using sealing rings, sealant, etc.

[0069] The variable frequency drive module 13 is installed in the first cavity 1101 and is used to drive loads such as fans and compressors. Exemplarily, the variable frequency drive module 13 includes power devices (such as IGBTs and MOSFETs), drive circuits, and protection circuits. During operation, the variable frequency drive module 13 generates significant current fluctuations and electromagnetic radiation. In this embodiment, the sealed first cavity 1101 shields against electromagnetic interference, while the heat dissipation structure 112 ensures that the variable frequency drive module 13 operates in a suitable temperature environment.

[0070] The second electrical control box 12 is disposed independently of the first electrical control box 11 and has a second cavity 1201. Specifically, the second electrical control box 12 may be made of the same or different material as the first electrical control box 11, and has an independent second cavity 1201, and is connected to the first electrical control box 11 by a cable. For example, as shown... Figure 4 As shown, the electrical control box includes a box body 121 and a wiring structure 122. The box body 121 forms the aforementioned second cavity 1201. The wiring structure 122 is connected to the box body 121 and has a wiring channel that connects to the second cavity 1201. The wiring channel is the wiring channel for the electrical connection lines between the circuit module in the first cavity 1101 and the circuit module in the second cavity 1201.

[0071] The central module 14 is installed in the second cavity 1201 and is mainly responsible for the data acquisition, processing, and transmission of electronic devices such as sensors and switching valves, and transmits the data to the main control module 15 for further processing. For example, the central module 14 includes a circuit board with a communication interface, which is connected to the main control board 151 via an electrical connection cable. The operating circuit of the central module 14 is a low-voltage circuit and is extremely sensitive to electromagnetic interference.

[0072] The main control module 15 is the control core of the electronic control device 1, responsible for receiving sensor data (such as temperature and pressure signals) and sending control commands to the frequency converter drive module 13. For example, the main control module 15 includes a main control board 151, which adopts a printed circuit board (PCB) integrated design and integrates components such as a microprocessor, signal processing circuit, and communication interface.

[0073] The main control module 15 is installed in either the first cavity 1101 or the second cavity 1201. In one configuration, as shown in the figure, the main control module 15 is installed in the first cavity 1101. In this configuration, the main control module 15 and the frequency converter drive module 13 are located inside the first cavity 1101. This shortens the signal transmission distance between the main control module 15 and the frequency converter drive module 13, reduces the influence of cable impedance, and improves the drive signal response speed. At the same time, it shares the heat dissipation structure 112 of the first electrical control box 11, reducing the overall layout complexity.

[0074] In another setting, such as Figure 5 As shown, the main control module 15 is installed in the second cavity 1201. In this configuration, the main control module 15 and the central module 14 are installed in the same cavity. Thus, since the second control box 12 and the first control box 11 are independently configured, the strong electromagnetic interference from the frequency converter drive module 13 is greatly avoided, allowing the main control module 15 and the central module 14 to operate in the same low electromagnetic interference environment, facilitating integrated design. Simultaneously, the high-voltage circuit (first cavity 1101) and the low-voltage circuit (second cavity 1201) are completely separated, avoiding the risk of short circuits due to insulation failure (such as cable aging), and improving system safety.

[0075] In this embodiment, the frequency converter drive module 13 is installed in the first electrical control box 11, and the central module 14 is installed in the second electrical control box 12. The independent design of the first electrical control box 11 and the second electrical control box 12 forms a physical isolation barrier, which greatly reduces the impact of electromagnetic interference generated by the frequency converter drive module 13 on the central module 14 and ensures the stability of the operation of the electrical control device 1 system.

[0076] Meanwhile, the high-voltage circuit of the frequency converter drive module 13 and the low-voltage circuit of the central module 14 are placed in different cavities, which, together with the sealed protection of the first cavity 1101, greatly improves the safety of the electronic control device 1.

[0077] In addition, the heat dissipation structure 112 can dissipate the heat generated by the frequency converter drive module 13 in a timely manner, ensuring that the frequency converter drive module 13 operates in a suitable temperature environment and extending the life of the electronic components inside the control box.

[0078] Furthermore, when the frequency converter drive module 13 or the central module 14 fails, the corresponding electrical control box can be disassembled separately for repair without the need for overall power outage troubleshooting, thus improving maintenance efficiency.

[0079] In some embodiments, please refer to Figures 4 to 6 The variable frequency drive module 13 includes a drive board 131 and a filter board 132. The drive board 131 is equipped with a drive circuit for driving loads such as compressors and fans. The filter board 132 is used to filter the input and output currents, remove harmonics and other interference, and improve power quality. As the core components of the variable frequency drive module 13, the filter board 132 and the drive board 131 generate heat during operation. If heat cannot be dissipated effectively in a timely manner, it will seriously affect their performance and service life.

[0080] Therefore, the first cavity 1101 in this embodiment is designed as a split-cavity structure. Specifically, the first cavity 1101 includes a first sub-cavity 1102 and a second sub-cavity 1103. The first electrical control box 11 includes a first cover 1111 and a second cover. The heat dissipation structure 112 has a first side and a second side arranged opposite to each other. The first cover 1111 cooperates with the first side of the heat dissipation structure 112 to form a sealed first sub-cavity 1102, and the second cover cooperates with the second side of the heat dissipation structure 112 to form a sealed second sub-cavity 1103. That is, the cavity structure of the first electrical control box 11 adopts a sandwich-like structure design, with the heat dissipation structure 112 as the middle layer, the first side forming the first sub-cavity 1102 (accommodating the drive board 131), and the second side forming the second sub-cavity 1103 (accommodating the filter board 132). In this embodiment, by placing the drive board 131 and the filter board 132 on the first sub-cavity 1102 and the second sub-cavity 1103 on both sides of the heat dissipation structure 112, the drive board 131 and the filter board 132 share the heat dissipation structure 112, making full use of the heat dissipation advantage of the heat dissipation structure 112, thereby improving the overall heat dissipation performance of the electronic control device 1.

[0081] The main control module 15 is installed in either the first sub-cavity 1102 or the second sub-cavity 1103. In one configuration, the main control module 15 is installed in the first sub-cavity 1102. For example, the main control board 151 and the drive board 131 are arranged in parallel, which greatly shortens the electrical connection between the two and thus reduces signal delay. In another configuration, the main control module 15 is installed in the second sub-cavity 1103. For example, the main control board 151 is fixed to the side of the filter board 132 by an insulating bracket. The insulating bracket blocks the high-voltage circuit of the filter board 132, thereby avoiding the influence of the high-voltage circuit on the main control board 151.

[0082] In some embodiments, the main control module 15 and the drive board 131 are spaced apart along the first side surface of the heat dissipation structure 112. Exemplarily, the main control board 151 and the drive board 131 are arranged at a distance in the vertical direction, with the drive board 131 disposed in the lower region of the first sub-cavity 1102 and the main control board 151 mounted in the upper region of the first sub-cavity 1102.

[0083] In the direction from the first side to the second side of the heat dissipation structure 112, that is, in the thickness direction of the heat dissipation structure 112, the circuit layouts of the driver board 131 and the filter board 132 at least partially overlap. For example, the IGBT module area of ​​the driver board 131 and the rectifier bridge and common mode inductor area of ​​the filter board 132 are projected to overlap in the direction from the first side to the second side of the heat dissipation structure 112, thereby utilizing the heat dissipation structure 112 as a common heat conduction medium for the overlapping circuits.

[0084] In this embodiment, the overlapping layout of the drive board 131 and the filter board 132 reduces the length of the first electronic control box 11, making the structure more compact.

[0085] In some of these embodiments, such as Figure 7 As shown, the heat dissipation structure 112 is provided with a first through hole 1121, which connects the first sub-cavity 1102 and the second sub-cavity 1103.

[0086] The electrical control device 1 in this embodiment also includes a power connection structure, which can be a conductive post, a wire, or other conductive connector. The power connection structure passes through the first via 1121, and its two ends are respectively connected to the drive board 131 and the filter board 132 to electrically connect the drive board 131 and the filter board 132. By setting the first via 1121 and the power connection structure, the connection between circuits can be simplified, and the complexity and length of internal wiring can be reduced.

[0087] From a structural layout perspective, the first cover 1111 and the heat dissipation structure 112 cooperate to form the first sub-cavity 1102, and the drive board 131 is installed inside the first sub-cavity 1102; the second cover and the heat dissipation structure 112 cooperate to form the second sub-cavity 1103, and the filter board 132 is installed inside the second sub-cavity 1103.

[0088] When the driver board 131 and the filter board 132 are working, the heat generated is first conducted to the internal space of their respective cavities. Since the heat dissipation structure 112 serves as part of the wall of the two cavities, the heat is quickly transferred to the heat dissipation structure 112. The heat dissipation structure 112 carries away the absorbed heat through its own good thermal conductivity or internal heat dissipation channels, thereby achieving heat dissipation for the driver board 131 and the filter board 132.

[0089] This heat dissipation design allows the heat dissipation structure 112 to simultaneously dissipate heat from the circuit boards in both cavities, significantly improving heat dissipation efficiency compared to traditional independent heat dissipation methods. On one hand, the large heat dissipation surface of the heat dissipation structure 112 can fully contact the heat sources in both cavities, quickly absorbing heat. On the other hand, the shared heat dissipation structure 112 design reduces redundant heat dissipation structures 112, lowering costs and the overall size of the electronic control device 1. Furthermore, the unified heat dissipation system facilitates later maintenance and management, ensuring that the drive board 131 and filter board 132 always operate in a suitable temperature environment, guaranteeing the stable operation of the frequency converter module, and thus improving the reliability and service life of the entire electronic control device 1.

[0090] In some embodiments, the frequency converter drive module 13 and the main control module 15 are arranged in a planar layout along the bottom of the first cavity 1101 (i.e., the surface of the heat dissipation structure 112). For example, the frequency converter drive module 13 and the main control module 15 are arranged side by side in the vertical direction, forming independent high-voltage and low-voltage areas to avoid mutual interference. At the same time, the flat layout of the circuit modules allows all circuit modules to be directly disassembled from the top of the first cavity 1101, reducing the time required to replace the drive board 131 or the main control module 15 and improving maintenance efficiency.

[0091] In some embodiments, the frequency converter drive module 13 includes a drive board 131 and a filter board 132, with the main control module 15 and the filter board 132 respectively arranged on opposite sides of the drive board 131. Specifically, the drive board 131 is centrally located, with the filter board 132 and the main control board 151 on either side. The drive board 131 serves as an intermediate isolation layer, capable of shielding the electromagnetic interference from the circuit modules on both sides, thereby reducing the impact of electromagnetic interference generated by the filter board 132 on the main control board 151.

[0092] In some of these embodiments, such as Figure 5 As shown, the main control module 15 is installed in the second cavity 1201, and the main control module 15 and the central module 14 are laid flat along the bottom of the second cavity 1201. In this embodiment, the main control module 15 and the central module 14 can be arranged in two ways: horizontally or vertically. For example, the main control module 15 is located on the left side, and the central module 14 is located on the right side. Alternatively, the main control module 15 can be arranged above the central module 14. The flat layout of the main control module 15 and the central module 14 makes the two modules more intuitively displayed in the opening of the second cavity 1201, allowing maintenance personnel to directly operate the two modules and improving maintenance efficiency. At the same time, the flat layout can increase the convection area between the two modules and the air, thereby improving heat dissipation efficiency.

[0093] The main control module 15 includes a main control power board and a main control board 151. Along the depth direction of the second cavity 1201, the main control power board is located below the main control board 151. The central module 14 is electrically connected to the main control board 151, and the main control power board is electrically connected to the frequency converter drive module 13.

[0094] In this embodiment, the main control power board is electrically connected to the main control board 151 and is used for high-voltage power access and to provide a stable power supply to the main control board 151.

[0095] Considering the safety hazards during wiring of the main control module 15, this embodiment arranges the main control board 151 and the main control power board in a stacked manner along the depth direction of the second cavity 1201, with the main control power board located below the main control board 151. In actual operation, the main control power board connects to high-voltage lines, posing a high risk of electric shock; while the main control board 151 processes low-voltage signals, offering relatively higher safety. Through this layered layout, during wiring operations, the operator directly faces the main control board 151, only interacting with low-voltage signals, effectively avoiding direct contact with high-voltage lines, significantly reducing the risk of electric shock during wiring, and improving safety during the operation process.

[0096] Meanwhile, the main control board 151 and the main control power board are stacked and spaced apart, which can reduce the impact of electromagnetic interference generated by the main control power board on the main control board 151 and improve the stability and accuracy of the signal.

[0097] In some embodiments, along the depth direction of the second cavity 1201, the main control board 151 of the main control module 15 and the PCB substrate of the central module 14 are set at the same height, which shortens the wiring length and avoids the bending and growth of cables due to the height difference, making the structure more compact.

[0098] In some embodiments, the heat dissipation structure 112 is configured as an integrated structure. Specifically, the heat dissipation structure 112 includes an integrated cold plate body 1123 and a surrounding plate 1124. The cold plate body 1123 is plate-shaped and has heat dissipation channels, through which heat exchange is achieved. The heat dissipation channels can be serpentine or other irregularly shaped channels, and the cold plate body 1123 can be made of high thermal conductivity materials such as aluminum alloy or copper alloy.

[0099] The enclosure 1124 is connected to the side of the cold plate body 1123 facing away from the filter plate 132. The first cover 1111 is sealed to the side of the enclosure 1124 away from the cold plate body 1123 to form the first sub-cavity 1102.

[0100] For example, one side of the enclosure 1124 is integrally formed and connected to the periphery of the cold plate body 1123. A sealing groove is formed on the end face of the enclosure 1124 away from the cold plate body 1123. A silicone rubber sealing ring is embedded in the sealing groove. The first box cover 1111 is placed on the end face of the enclosure 1124 and covers the opening of the sealing groove to seal the first sub-cavity 1102.

[0101] In some embodiments, both the first cover 1111 and the second cover are provided with sealing grooves on the side facing the heat dissipation structure 112, or both the first side and the second side of the heat dissipation structure 112 are provided with sealing grooves.

[0102] The sealing groove is equipped with a sealing element. The first cover 1111 and the second cover are respectively attached to the heat dissipation structure 112 to seal the first sub-cavity 1102 and the second sub-cavity 1103.

[0103] The following explanation uses the example of a heat dissipation structure 112 having a sealing groove on its first side, sealing the first sub-cavity 1102.

[0104] Specifically, as described in the above embodiments, the heat dissipation structure 112 includes an integrally formed cold plate body 1123 and a surrounding plate 1124. A sealing groove is formed on the end face of the surrounding plate 1124 away from the cold plate body 1123. The sealing groove surrounds the open edge of the first sub-cavity 1102, forming a continuous closed annular structure. The cross-sectional shape of the sealing groove can be rectangular or trapezoidal, and the sealing groove can be formed on the end face of the surrounding plate 1124 by processes such as injection molding, CNC milling, or stamping.

[0105] The first cover 1111 serves as the sealing component of the first sub-cavity 1102, and its edge contour matches the opening of the annular sealing groove. When the first cover 1111 is placed over the opening of the first sub-cavity 1102, its edge covers and seals the opening of the sealing groove, creating a relatively independent sealed space. The first cover 1111 and the surrounding plate 1124 can be fixed by bolts, snap-fit ​​connections, or welding.

[0106] In this embodiment, the sealing groove is filled with a sealing element, which can be an elastic sealing ring or liquid sealant. When the first cover 1111 is closed with the surrounding plate 1124, the sealing element is compressed, resulting in elastic deformation or a curing reaction, filling the tiny gap between the sealing groove and the first cover 1111, thereby sealing the first sub-cavity 1102 and preventing external dust, moisture, etc. from entering the first sub-cavity 1102, thus protecting the electronic components of the internal circuit module.

[0107] In some embodiments, the electronic control device 1 further includes a power terminal block for connecting an external power supply line, the layout of which facilitates wiring by the user.

[0108] Specifically, the power connector is mounted on the heat dissipation structure 112 and located on the side of the drive board 131 away from the main control module 15, and partially extends into the second sub-cavity 1103 and is electrically connected to the filter board 132. Since the power connector is connected to municipal high-voltage power, the way the power connector and the main control module 15 are separated in this embodiment effectively avoids interference from high-voltage power to the weak-voltage signals of the main control module 15. In one configuration, the heat dissipation structure 112 is a long strip-shaped plate structure, with the main control module 15 and the power connector located at both ends of the heat dissipation structure 112 along its length, while the drive board 131 is located in the middle of the heat dissipation structure 112, thereby separating the main control module 15 and the power connector.

[0109] In some embodiments, such as Figure 7 As shown, the heat dissipation structure 112 is provided with a second through hole 1122 communicating with the second sub-cavity 1103. The second through hole 1122 is located on the side of the second sub-cavity 1103 away from the first cavity 1101. The power connector is installed at the second through hole 1122 and is partially exposed on the side of the heat dissipation structure 112 facing away from the second sub-cavity 1103. Specifically, the power connector includes an insulating base and a conductive post. The insulating base passes through the second through hole 1122 and seals the hole wall of the second through hole 1122, playing a role in insulation and sealing. The conductive post passes through the insulating base, with one end extending into the second sub-cavity 1103 and connecting to the filter plate 132, and the other end exposed on the surface of the insulating base facing away from the second sub-cavity 1103 for connecting an external power cord.

[0110] During the operation of the electronic control device 1, due to the large operating power of the drive board 131 and the filter board 132, the pressure changes inside the sealed first sub-cavity 1102 and the second sub-cavity 1103 may affect the performance stability of the electronic control device 1. Therefore, the electronic control device 1 of this application is also equipped with a pressure balancing tank.

[0111] Specifically, the pressure balancing vessel is installed within the first sub-cavity 1102 and / or the second sub-cavity 1103. For example, the pressure balancing vessel can be installed on the side wall, top, or bottom of the first sub-cavity 1102 and the second sub-cavity 1103 by welding, bolting, or snap-fit ​​connection to save space. The pressure balancing vessel is typically a cylindrical or ellipsoidal container made of a resilient material. The pressure balancing vessel has vents that connect to the outside.

[0112] When the electronic control device 1 is running, the drive board 131 and filter board 132 generate heat, causing the gas temperature in the first sub-cavity 1102 and the second sub-cavity 1103 to rise, expand in volume, and increase in pressure. At this time, the high-pressure gas compresses the pressure balance tank, causing the pressure balance tank to undergo elastic deformation, allowing the gas inside the pressure balance tank to be discharged to the outside of the electronic control device 1 through the vent. This keeps the internal cavity pressure of the electronic control device 1 balanced with the external pressure, avoiding problems such as sealing failure and component deformation caused by pressure changes in the first sub-cavity 1102 and the second sub-cavity 1103, extending the service life of the frequency converter drive module 13, and improving the operational stability of the electronic control device 1.

[0113] In some embodiments, the power terminal block 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 from the access port 200a without needing to reach into the electrical control box or operate away from the access port 200a, thus reducing operational difficulty and time. When a power cord fault occurs, the power terminal block facing the access port 200a allows maintenance personnel to quickly locate the problem, facilitating timely troubleshooting and repair, and reducing equipment downtime.

[0114] As mentioned above, the second control box 12 is independently configured from the first control box 11. In some embodiments, the second control box 12 can be located on the rear side of the first control box 11, away from the inspection port 200a. The central module 14 is installed inside the second control box 12. Placing the second control box 12 on the rear side can avoid accidental operation of the second control box 12 during maintenance. Furthermore, the high-voltage area (frequency converter drive module 13) and the low-voltage area (central module 14) are separated to avoid electromagnetic interference between the high-voltage and low-voltage circuits.

[0115] 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 second electrical control box 12 can be connected to the switching valve via a bracket. Understandably, various sensors, electronic valve bodies, etc., are installed on the refrigerant piping connected to the switching valve. In this embodiment, the second electrical control box 12 is installed 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 and simplifies the overall wiring of the unit.

[0116] Specifically, the second electrical control box 12 includes a box body 121 and two wiring structures 122 connected to the box body 121. Each wiring structure 122 has a wiring channel connecting to the second cavity 1201. The central module 14 is disposed within the box body 121. One wiring conduit is positioned close to the first electrical control box 11. One type of electrical connection wire (such as the central communication line, temperature sensor wiring group, and pressure sensor wiring group) is routed through the conduit closest to the first electrical control box 11, while another type of electrical connection wire (such as the four-way valve wiring group and electronic expansion valve wiring group) is routed through the other conduit away from the first electrical control box 11. This arrangement of different types of wiring in different conduits makes the wiring clearer and more organized. During installation and maintenance, operators can more easily identify and handle various wiring patterns, reducing the possibility of wiring intersections and confusion, improving maintenance efficiency, and lowering maintenance costs.

[0117] 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 electrically controlled device, characterized by, include: Variable frequency drive module; The main control module is electrically connected to the frequency converter drive module; The central module is electrically connected to the main control module; The first electrical control box includes a box body and a heat dissipation structure, wherein the box body and the heat dissipation structure cooperate to form a sealed first cavity; as well as The second electrical control box is set independently of the first electrical control box and has a second cavity; The variable frequency drive module is installed in the first cavity, the central module is installed in the second cavity, and the main control module is installed in either the first cavity or the second cavity.

2. The electrically controlled device according to claim 1, wherein The first cavity includes a first sub-cavity and a second sub-cavity, and the frequency conversion drive module includes a drive board and a filter board; The housing includes a first cover and a second cover. The heat dissipation structure has a first side and a second side arranged opposite to each other. The first cover and the first side of the heat dissipation structure cooperate to form a sealed first sub-cavity. The second cover and the second side of the heat dissipation structure cooperate to form a sealed second sub-cavity. The drive board is installed in the first sub-cavity, the filter board is installed in the second sub-cavity, and the main control module is installed in either the first sub-cavity or the second sub-cavity.

3. The electrically controlled device of claim 2, wherein, The main control module is installed in the first sub-cavity. The main control module and the drive board are arranged at intervals along the surface of the first side of the heat dissipation structure. In the direction from the first side to the second side, the drive board and the filter board at least partially overlap.

4. The electrically controlled device according to claim 3, wherein The heat dissipation structure is provided with a first through hole, which connects the first sub-cavity and the second sub-cavity; The electronic control device further includes a power connection structure, which passes through the first through hole, and the two ends of the power connection structure are respectively connected to the drive board and the filter board.

5. The electrically controlled device of claim 3, wherein, The electronic control device also includes a power connector for connecting an external power supply line. The power connector is installed on the heat dissipation structure and is located on the side of the drive board away from the main control module. A portion of the power connector extends into the second sub-cavity and is electrically connected to the filter board.

6. The electrically controlled device according to claim 5, wherein The heat dissipation structure is also provided with a second through hole that connects to the second sub-cavity; The power connector includes an insulating base and a conductive post. The insulating base passes through the second through hole and seals the hole wall of the second through hole. The conductive post passes through the insulating base, with one end of the conductive post extending into the second sub-cavity and connecting to the filter plate, and the other end exposed on the surface of the insulating base facing away from the second sub-cavity.

7. The electrically controlled device according to any one of claims 2 to 6, wherein The heat dissipation structure has heat dissipation channels.

8. The electrically controlled device of claim 7, wherein, The heat dissipation structure includes an integrated cold plate body and a surrounding plate. The cold plate body is plate-shaped and is provided with the heat dissipation channels. The enclosure is connected to the side of the cold plate body facing away from the filter plate, and the first cover is sealed to the side of the enclosure away from the cold plate body to form the first sub-cavity.

9. The electrically controlled device of claim 1, wherein, The frequency conversion drive module and the main control module are laid flat along the bottom of the first cavity; Alternatively, the variable frequency drive module includes a drive board and a filter board, with the main control module and the filter board respectively arranged on opposite sides of the drive board.

10. The electrically controlled device of claim 1, wherein, The main control module is installed in the second cavity, and the main control module and the central module are laid flat along the bottom of the second cavity.

11. The electronic control device according to claim 10, characterized in that, The main control module includes a main control power board and a main control board. The main control power board is electrically connected to the frequency converter drive module, and the main control board is electrically connected to the central module. Along the depth direction of the second cavity, the main control power board is located below the main control board, and / or the main control board and the base plate of the central module are at the same height.

12. The electronic control device according to claim 2, characterized in that, Both the first and second lids have sealing grooves on the side facing the heat dissipation structure, or both the first and second sides of the heat dissipation structure have sealing grooves. The sealing groove is provided with a sealing element, and the first box cover and the second box cover are respectively fitted to the heat dissipation structure to seal the first sub-cavity and the second sub-cavity.

13. The electronic control device according to claim 2, characterized in that, A pressure balancing tank is provided in the first sub-cavity and / or the second sub-cavity.

14. A heating, ventilation, and air conditioning (HVAC) device, characterized in that, It includes a housing and an electronic control device as described in any one of claims 1 to 13, wherein the electronic control device is disposed within the housing.

15. The HVAC equipment according to claim 14, characterized in that, The housing is provided with an inspection port, and the electronic control device is located at the inspection port, wherein the first electronic control box is positioned facing the inspection port.

16. The HVAC equipment according to claim 15, characterized in that, The HVAC equipment also includes a switching valve disposed within the housing, and the second electrical control box is mounted on the switching valve.

17. The HVAC equipment according to claim 16, characterized in that, The second electrical control box is located on the rear side of the first electrical control box, away from the inspection port.

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