Air conditioner, air conditioner indoor unit and electric control box

Abstract

The utility model relates to the technical field of air conditioning, and provides an air conditioner, an air conditioner indoor unit and an electric control box. The electric control board is contained in the box body and comprises a power board, a control board and a fan driving module, and the fan driving module comprises a fan driving board; wherein the control panel and the fan driving board are arranged on one side of the power panel and are electrically connected to the power panel, the power panel is configured to convert power frequency alternating current into direct current so as to supply power to the control panel and the fan driving board, and the control panel is a logic control unit of the air conditioner indoor unit. And the fan driving plate is configured to be capable of driving a fan of the indoor unit of the air conditioner under the control of the control plate. The technical problem to be solved by the utility model is how to reduce the possibility of misoperation of wiring of the electric control box. The size of the electric control box is reduced.

Description

[0001] This application claims priority to Chinese patent application No. 202510495686.4, filed on April 18, 2025, entitled "An Air Conditioner, an Indoor Unit of an Air Conditioner and an Electrical Control Box", the contents of which are to be understood as incorporated herein by reference. Technical Field

[0002] This article relates to the field of air conditioning technology, and in particular to an air conditioner, an indoor unit of an air conditioner, and an electrical control box. Background Technology

[0003] In the current air conditioning technology field, as consumers' demands for the diversification and complexity of indoor unit functions continue to rise, the main control board of the indoor unit is undertaking increasingly numerous control tasks. To achieve these rich functions, the design scale of the main control board has continued to expand, and its area is now close to half of the entire air conditioner casing area. The increase in the area of ​​the main control board directly leads to a corresponding increase in the size of the electrical control box.

[0004] An excessively large electrical control box becomes an obstacle in the internal space layout of an air conditioner. It occupies the effective space of the air conditioning duct, obstructs airflow, seriously affects the air volume output of the whole unit, and reduces the cooling and heating efficiency of the air conditioner. Utility Model Content

[0005] The technical problem to be solved by this application is how to reduce the size of the electrical control box.

[0006] This application discloses an electrical control box for an indoor unit of an air conditioner, comprising:

[0007] Box body;

[0008] An electronic control board, housed in the housing, includes a power board, a control board, and a fan drive module, wherein the fan drive module includes a fan drive board.

[0009] The control board and the fan drive board are located on one side of the power supply board and are both electrically connected to the power supply board. The power supply board is configured to convert AC power into DC power to supply power to the control board and the fan drive board. The control board is the logic control unit of the air conditioner indoor unit, and the fan drive board is configured to drive the fan of the air conditioner indoor unit under the control of the control board.

[0010] In one illustrative embodiment, the power board is disposed at the bottom of the housing, and the control board and the fan drive board are both disposed on the side of the power board near the top of the housing;

[0011] The control board is fixedly connected to the power board and perpendicular to the power board, and the fan drive board is fixedly connected to the power board and perpendicular to the power board.

[0012] In one illustrative embodiment, the power board is provided with a first mating hole, and the control board is provided with a first connecting pin inserted into the first mating hole, the first connecting pin being soldered to the power board; and / or,

[0013] The power board is provided with a second docking hole, and one end of the fan drive board is provided with a second connecting pin inserted into the second docking hole. The second connecting pin is soldered to the power board.

[0014] In one illustrative embodiment, both the first and second mating holes are configured as through holes, and the first and second mating holes are respectively located near two sides of the power board;

[0015] The two sides are either two adjacent sides of the power board or two opposite sides of the power board.

[0016] In one illustrative embodiment, the control board rests flat on the power board; and / or,

[0017] The fan drive module is placed flat on the power board.

[0018] In one illustrative embodiment, the wall of the housing is provided with heat dissipation openings;

[0019] The fan drive module also includes a heat sink that abuts against the fan drive plate, and the heat sink covers the heat dissipation opening.

[0020] In one illustrative embodiment, the control board is provided with a main control circuit;

[0021] The fan drive board is equipped with a fan drive circuit.

[0022] The power board is equipped with a power supply circuit and a filter and rectifier circuit.

[0023] The power supply circuit is electrically connected to the main control circuit and is used to convert the power frequency AC power into DC power V that is supplied to the main control circuit.

[0024] The filter and rectifier circuit is electrically connected to the fan drive circuit and is used to convert the power frequency AC power into DC power to be supplied to the fan drive board.

[0025] The fan drive circuit is used to convert the DC power output by the filter rectifier circuit into the drive current of the fan.

[0026] In one illustrative embodiment, the power board is further provided with a switching circuit for switching the electric heater of the indoor unit of the air conditioner on and off.

[0027] The control board is also equipped with a communication circuit, a sensor circuit, and a valve drive circuit that are electrically connected to the main control circuit. The communication circuit is used to realize data transmission and communication between the main control circuit and the controller and wired controller of the outdoor unit of the air conditioner, respectively. The valve drive circuit is used to output drive current to the electronic expansion valve of the indoor unit of the air conditioner to adjust the opening of the electronic expansion valve. The sensor circuit is used to collect environmental parameters and convert them into electrical signals for the main control circuit to make decisions.

[0028] In one illustrative embodiment, the electrical control box includes multiple wiring terminals;

[0029] Multiple wiring terminals include power line terminals, communication line terminals, electric auxiliary heating terminals, and multiple low-voltage wiring terminals on the control board.

[0030] The power cord terminal is electrically connected to the power circuit, the filter rectifier circuit, and the switch circuit, and is used to connect the power cord of the indoor unit of the air conditioner.

[0031] The communication line terminal is electrically connected to the communication circuit and is used to connect the communication line of the indoor unit of the air conditioner.

[0032] The electric auxiliary heating terminal is electrically connected to the switching circuit and is used to connect the wires of the electric heater of the indoor unit of the air conditioner.

[0033] The sensor circuit is connected to the low-voltage wiring terminal of the sensor used to connect to the indoor unit of the air conditioner.

[0034] The valve drive circuit is connected to the low-voltage terminal block for connecting the electronic expansion valve.

[0035] In one illustrative embodiment, the power board is provided with a third mating hole;

[0036] The electronic control board also includes a fan terminal block with a third connecting pin, the third connecting pin being inserted into the third mating hole and soldered to the power board;

[0037] The electrical control box also includes a fan terminal block disposed on the fan terminal block, and the fan terminal block is electrically connected to the fan terminal block.

[0038] In one illustrative embodiment, a first sealant layer is also included to fill the gap between the power board and the bottom wall of the housing.

[0039] In one illustrative embodiment, a second sealant layer is also included, which covers the surface of the power board facing the control board.

[0040] In one illustrative embodiment, the second sealant layer completely covers the pins of all electronic components on the power board surface facing the control board.

[0041] In one illustrative embodiment, the housing includes:

[0042] The bottom shell has an opening at its top; and,

[0043] The top cover connects to the bottom shell and covers the opening of the bottom shell;

[0044] The bottom shell and the top cover enclose a cavity to accommodate the electronic control board, and the power board is disposed inside the bottom shell.

[0045] In one illustrative embodiment, the upper cover is provided with a first through hole, and the bottom shell is provided with a second through hole coaxial with the first through hole;

[0046] The electronic control board is provided with a third through hole coaxial with the first through hole and a grounding terminal for grounding;

[0047] The grounding terminal is located around the end of the third through hole that is closer to the first through hole;

[0048] The electrical control box also includes a grounding screw;

[0049] The grounding screw includes a head that abuts against the grounding terminal and has a diameter smaller than the first through hole, and a screw rod with one end connected to the head and passing through the second through hole and the third through hole.

[0050] In one illustrative embodiment, an isolation ring is also provided on the side of the bottom shell near the power board;

[0051] One end of the isolation ring surrounds the second through hole, and the other end abuts against the surface of the power board.

[0052] In one illustrative embodiment, a rubber-blocking sleeve is also included;

[0053] The sealant sleeve includes a cylinder body, one end of which abuts against the surface of the power board facing the control board and surrounds the third through hole. The axial height of the cylinder body is greater than the thickness of the second sealant layer.

[0054] In one illustrative embodiment, the rubber-blocking cylinder further includes a connecting post, one end of which is connected to the cylinder body and the other end is inserted into the power board.

[0055] In one illustrative embodiment, the upper cover is further provided with a guide tube extending from the first through hole to the adhesive-blocking tube;

[0056] The rubber-blocking cylinder is coaxially arranged with the guide cylinder.

[0057] In one illustrative embodiment, the grounding terminal is configured as an annular pad surrounding the third through hole, and the inner diameter of the adhesive-blocking sleeve is set to be larger than the outer diameter of the grounding terminal.

[0058] In one illustrative embodiment, the box body is provided with a metal shielding layer covering the outer wall of the box body.

[0059] In one illustrative embodiment, the wind turbine drive module further includes a protective housing and an insulating component connected to the protective housing;

[0060] The insulating component is sandwiched between the heat sink and the power board;

[0061] The protective shell has an inner cavity for accommodating the fan drive plate and an opening on one side of the inner cavity. The radiator and the insulating component together cover the opening of the protective shell.

[0062] In one illustrative embodiment, the insulating element is provided with a clearance opening, and the power board is provided with mounting holes aligned with the clearance opening;

[0063] The bottom end of the radiator is provided with a support column, which passes through the relief opening and is inserted into the mounting hole.

[0064] This application also proposes an air conditioner that includes an indoor unit as described above.

[0065] In the technical solution of this application, the electronic control board is composed of multiple circuit boards such as a power board, a control board, and a fan drive module. The control board and the fan drive module are located on one side of the power board, which can make full use of the height space of the electronic control box, reduce the length and width of the electronic control box, make the area occupied by the electronic control box smaller, realize the miniaturization of the electronic control box, improve the power density of the electronic control box, reduce the volume occupied by the box, increase the airflow area of ​​the air duct of the air conditioner indoor unit, reduce the air resistance in the air duct, and thus increase the air volume of the air conditioner indoor unit.

[0066] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the application. Other advantages of this application can be realized and obtained by means of the solutions described in the description and the accompanying drawings. Attached Figure Description

[0067] The accompanying drawings are used to provide an understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0068] Figure 1 This is a perspective view of an electrical control box according to an embodiment of this application;

[0069] Figure 2 This is a perspective view of the electrical control box from another angle in an embodiment of this application;

[0070] Figure 3 This is a top view of an electrical control box according to an embodiment of this application;

[0071] Figure 4 This is a perspective view of the electrical control box after the top cover has been removed in an embodiment of this application;

[0072] Figure 5 This is a perspective view of the bottom shell in an embodiment of this application;

[0073] Figure 6 This is a perspective view of the top cover in an embodiment of this application;

[0074] Figure 7 This is a three-dimensional schematic diagram of the heat sink in the embodiments of this application;

[0075] Figure 8 This is a full cross-sectional schematic diagram of an electrical control box according to an embodiment of this application;

[0076] Figure 9 This is a three-dimensional schematic diagram of a rubber-blocking cylinder according to an embodiment of this application;

[0077] Figure 10 This is a schematic diagram of a power board according to an embodiment of this application;

[0078] Figure 11 This is a schematic diagram of a main control board according to an embodiment of this application;

[0079] Figure 12 This is a perspective view of another type of electrical control box in the embodiments of this application;

[0080] Figure 13 This is a perspective view of another type of electrical control box in the embodiments of this application.

[0081] Figure label:

[0082] 100. Electrical control box; 1. Box body; 11. Bottom shell; 111. Second through hole; 1111. Base plate; 1112. Side plate; 12. Top cover; 121. Cover; 122. Insulating protrusion; 123. First through hole; 124. Guide tube; 10. Wiring opening; 101. Power wiring opening; 102. Communication wiring opening; 103. Load wiring opening; 104. Low voltage wiring opening; 13. Heat dissipation opening; 2. Electrical control board; 21. Power board; 210. Third through hole; 211. First mating hole; 212. Second mating hole; 213. Third mating hole; 214. Power circuit; 215. Switching circuit; 216. Filtering and rectifying circuit; 22. Control... 1. Board; 221. First connecting pin; 222. Main control circuit; 223. Sensor circuit; 224. Valve drive circuit; 225. Communication circuit; 23. Fan terminal block; 24. Insulating cover; 241. Isolation chamber; 25. Insulating frame; 251. Insulating board; 252. Connecting plate; 261. Insulating shell; 27. Fan drive module; 271. Radiator; 272. Protective shell; 3. Wiring terminal; 31. Power line terminal; 32. Communication line terminal; 33. Electric auxiliary heating wiring terminal; 34. Low voltage wiring terminal; 35. Fan wiring terminal; 41. First sealing layer; 42. Second sealing layer; 5. Glue-blocking cylinder; 51. Cylinder body; 52. Connecting post;

[0083] 101a Power supply wiring opening; 102a Communication wiring opening; 103a Load wiring opening; 104a Low voltage wiring opening; 105a Fan wiring opening. Detailed Implementation

[0084] This application describes several embodiments, but these descriptions are exemplary and not restrictive, and it will be apparent to those skilled in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with, or may replace, any feature or element of any other embodiment.

[0085] This application includes and contemplates combinations of features and elements known to those skilled in the art. The embodiments, features, and elements disclosed in this application can also be combined with any conventional features or elements to form unique inventive solutions. Any feature or element of any embodiment can also be combined with features or elements from other inventive solutions to form another unique inventive solution. Therefore, it should be understood that any feature shown and / or discussed in this application can be implemented individually or in any suitable combination. Therefore, the embodiments are not limited except by the limitations imposed by the appended claims and their equivalents. Furthermore, various modifications and changes can be made within the scope of the appended claims.

[0086] Furthermore, in describing representative embodiments, the specification may have presented methods and / or processes as a specific sequence of steps. However, the method or process should not be limited to the specific order of steps described herein, to the extent that it does not depend on such a specific order. As will be understood by those skilled in the art, other sequences of steps are also possible. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation of the claims. Moreover, the claims concerning the method and / or process should not be limited to the steps performed in the written order, and those skilled in the art will readily understand that these orders can be varied and still remain within the spirit and scope of the embodiments of this application.

[0087] This application discloses an air conditioner. The air conditioner is a split-type air conditioner. The air conditioner includes an indoor unit. The indoor unit is installed in an indoor space. One or more indoor units may be installed.

[0088] The indoor unit of the air conditioner includes an electrical control box 100, an indoor heat exchanger, an electronic expansion valve, a display panel, a wired controller, sensors, a fan, an electric heater, and a casing. An air duct is installed inside the casing, and the casing also has an air inlet at one end of the duct and an air outlet at the other end. Both the fan and the indoor heat exchanger are located within the air duct. The fan drives the air within the duct to flow from the air inlet to the air outlet, allowing the air to pass through the indoor heat exchanger and exchange heat with it, thereby achieving heating and cooling of the air.

[0089] The electronic expansion valve is located inside the housing. It is connected to the indoor heat exchanger. The electronic expansion valve precisely controls the flow and pressure of the refrigerant in the refrigerant circulation loop, thus throttling and reducing pressure, dynamically adjusting the refrigerant flow, improving energy efficiency, and enhancing system stability.

[0090] The display panel is located at the front of the unit. It displays the air conditioner's operating status information. For example, the display panel can show the air conditioner's set temperature, operating mode, indoor temperature, fault codes, and other information.

[0091] A wired controller is the control panel for an air conditioner. It can be installed on a wall indoors. The wired controller is used to set the air conditioner's operating mode, set the temperature, and turn the air conditioner on and off.

[0092] The sensors include a temperature sensor and a humidity sensor. The temperature sensor can be mounted on the casing or on the display panel. The temperature sensor is used to measure the indoor ambient temperature. The humidity sensor can also be mounted on the casing. The humidity sensor is used to measure the indoor ambient humidity.

[0093] An electric heater is installed inside the air duct. The electric heater is used to assist in heating the air flowing through the air duct.

[0094] like Figures 1-4 As shown, the electrical control box 100 includes a box body 1 and an electrical control board 2. The box body 1 is constructed as a box. The box body 1 can be constructed as a roughly rectangular box. The box body 1 can be made of insulating material, such as plastic. The electrical control board 2 is housed in the box body 1. The electrical control board 2 is provided with the control circuit of the indoor unit of the air conditioner, which is used to control the operation of various actuators of the indoor unit of the air conditioner.

[0095] The control board 2 includes a power supply board 21, a control board 22, and a fan drive module 27. The power supply board 21 is a flat plate, which may be rectangular. The power supply board 21 is located at the bottom of the housing 1. The fan drive module 27 includes a fan drive board. The power supply board 21, control board 22, and fan drive board can all be printed circuit boards. Both the control board 22 and the fan drive board are located on the side of the power supply board 21 near the top of the housing 100, and both are electrically connected to the power supply board 21. The power supply board 21 is configured to convert AC power to DC power to supply power to the control board 22 and the fan drive board. The control board 22 is the logic control unit of the indoor air conditioning unit. The fan drive board is electrically connected to the fan. The fan drive board is configured to drive the fan of the indoor air conditioning unit under the control of the control board 22. The control board 22 and the fan drive board are electrically connected, either through the power supply board 21 or through wires.

[0096] In the technical solution of this application, the electronic control board 2 is composed of multiple circuit boards such as the power board 21, the control board 22, and the fan drive module 27. The control board 22 and the fan drive module 27 are located on one side of the power board 21, which can make full use of the height space of the electronic control box 100, reduce the length and width of the electronic control box 100, make the area occupied by the electronic control box 100 smaller, realize the miniaturization of the electronic control box 100, improve the power density of the electronic control box 100, reduce the volume occupied by the box 1, increase the airflow area of ​​the air duct of the air conditioner indoor unit, reduce the air resistance in the air duct, and thus increase the air volume of the air conditioner indoor unit.

[0097] In one illustrative embodiment, all fan drive modules 27 are located on the same side of power board 21, and control board 22 and fan drive board are fixedly connected to power board 21, and control board 22 and fan drive board are perpendicular to power board 21.

[0098] The control board 22 and the fan drive board can be connected to the power board 21 via connectors. This allows for both fixed connections between the power board 21 and the control board 22 and the fan drive board, and electrical connections between the power board 21 and the control board 22 and the fan drive board.

[0099] The control board 22 and the fan drive board can also be directly soldered onto the power board 21, thus achieving both fixed connection and electrical connection between the power board 21 and the control board 22 and the fan drive board.

[0100] In this way, the control board 22 and the fan drive board are connected to the same side of the power board 21 and are both perpendicular to the power board 21. The projected area of ​​the control board 22 and the fan drive board on the power board 21 is small, and they occupy a small area of ​​the power board 21. The remaining space on the power board 21 can be used to arrange electrical components, so that the power board 21 can be set to be smaller, which can further reduce the size of the electrical control box 100.

[0101] In one illustrative embodiment, such as Figure 10 As shown, the power board 21 is provided with a first mating hole 211 and a second mating hole 212. The first mating hole 211 and the second mating hole 212 are through holes.

[0102] The control board 22 is constructed as a flat plate, which can be a rectangular flat plate. The control board 22 is disposed on one side of the power board 21 and is perpendicular to the power board 21. One end of the control board 22 is provided with a first connecting pin 221. The first connecting pin 221 is inserted into the first mating hole 211 of the power board 21 and soldered to the power board 21. An electrical connection is formed between the control board 22 and the power board 21.

[0103] The fan drive board of the fan drive module 27 is a flat plate, which can be a rectangular plate. The fan drive board is located on one side of the power supply board 21 and is perpendicular to the power supply board 21. One end of the fan drive board is provided with a second connecting pin (not shown in the figure). The second connecting pin of the fan drive board is inserted into the second mating hole 212 of the power supply board 21 and is soldered to the power supply board 21. An electrical connection is formed between the fan drive board and the power supply board 21.

[0104] In this way, the first connecting pin 221 of the control board 22 is inserted into the first mating hole 211 of the power board 21 and soldered to the power board 21, which not only forms a stable fixed connection between the power board 21 and the control board 22, but also allows the control board 22 to form an electrical connection with the power board 21 through the first connecting pin 221. The second connecting pin of the fan drive board is inserted into the second mating hole 212 of the power board 21 and soldered to the power board 21, which not only forms a stable fixed connection between the power board 21 and the fan drive board, but also allows the fan drive board to form an electrical connection with the power board 21 through the second connecting pin.

[0105] In one illustrative embodiment, the first mating hole 211 and the second mating hole 212 are constructed as through holes. The shape of the through holes is not limited; they can be circular, square, strip-shaped, or other shapes. The first mating hole 211 and the second mating hole 212 are respectively located near two sides of the power board 21. These two sides can be two adjacent sides of the power board 21 or two opposite sides of the power board 21.

[0106] In this embodiment, the first docking hole 211 and the second docking hole 212 are constructed as strip-shaped through holes. The first docking hole 211 and the second docking hole 212 are respectively close to two adjacent sides of the power board 21, and the first docking hole 211 and the second docking hole 212 extend along two adjacent sides of the power board 21.

[0107] In this way, the fan drive module 27 and the control board 22 are located on two sides of the power board 21, respectively. The electrical components on the power board 21 can be concentrated in the remaining area of ​​the power board 21, which is beneficial to further increase the power density of the control board 2 and reduce the volume of the control box 100.

[0108] In another illustrative embodiment, the control board 22 and the fan drive board are parallel to the power board 21, and the control board 22 and the fan drive module 27 are placed flat on the power board 21. The control board 22 and the fan drive module 27 may be located on the same side of the power board 21, or they may be located on opposite sides of the power board 21.

[0109] In this way, the control board 22 and the fan drive module 27 are placed flat on the power board 21, which can make full use of the height space of the control box 100, reduce the length and width of the control box 100, make the area occupied by the control box 100 smaller, realize the miniaturization of the control box 100, increase the power density of the control box 100, reduce the volume occupied by the box 1, increase the airflow area of ​​the air duct of the air conditioner indoor unit, reduce the air resistance in the air duct, and thus increase the air volume of the air conditioner indoor unit.

[0110] In one illustrative embodiment, the housing 1 is provided with a wiring opening 10, which is a through hole. The number of wiring openings 10 is not limited; there may be one wiring opening 10 or multiple wiring openings 10.

[0111] The control box also includes multiple terminal blocks 3. These terminal blocks 3 are all mounted on the control board 2. The terminal blocks 3 may be soldered to the control board 2 and electrically connected to it. The terminal blocks 3 are used to connect the control board 2 to other electrical components in the indoor unit of the air conditioner. All terminal blocks 3 are exposed through wiring openings 10. These terminal blocks 3 can be electrically connected to the power supply, electronic expansion valve, display panel, wired controller, fan, electric heater, and temperature sensor via wires. All terminal blocks 3 are exposed externally through wiring openings 10 on the box body 1. These terminal blocks 3 may be exposed through the same wiring opening 10 on the box body 1, or through multiple wiring openings 10 on the box body 1.

[0112] In the embodiments of this application, the housing 1 of the control box 100 houses the control board 2, serving to protect the control board 2. During the installation, commissioning, and maintenance of the air conditioner, all the wiring terminals 3 of the control box 100 are exposed through the wiring openings 10 on the housing 1. Workers can connect all the wiring terminals 3 without opening the housing 1 of the control box 100, which greatly reduces the possibility of wiring errors and lowers the probability of damage to the control board 2.

[0113] In one illustrative embodiment, such as Figure 2 , 4 As shown, multiple terminal blocks 3 include a fan terminal block 35. The fan terminal block 35 is soldered onto the control board 2. The fan terminal block 35 is used to connect the wires of the fan of the indoor unit of the air conditioner. The control box 100 is connected to the fan wires via the fan terminal block 35. The fan terminal block 35 may be located on the top or side of the box 1. The fan terminal block 35 is exposed through a wiring opening 10 provided on the top or side of the box 1. In some embodiments, the wiring opening 10 includes a fan wiring opening 105. The fan terminal block 35 is exposed from the fan wiring opening 105.

[0114] In this way, the fan terminal 35 is located on the top or side of the box 1 and is exposed from the top or side of the box 1. The fan wires can be connected to the fan terminal 35 of the control box 100 without opening the box 1 of the control box 100. At the same time, the fan terminal 35 can be quickly identified during the wiring process, which can prevent incorrect wiring on the fan terminal 35 from damaging the control board 2.

[0115] In one illustrative embodiment, the power board 21 is provided with a third mating hole 213. Each of the third mating holes 213 is constructed as a strip-shaped through hole. The third mating hole 213 is located close to the second mating hole 212.

[0116] The control board 2 also includes a fan terminal block 23. The fan terminal block 23 is a flat plate, which can be rectangular. The fan terminal block 23 can be a printed circuit board. The fan terminal block 23 is located on the side of the power board 21 facing away from the bottom shell 11 and is perpendicular to the power board 21. One end of the fan terminal block 23 is provided with a third connecting pin (not shown in the figure). The third connecting pin of the fan terminal block 23 is inserted into the third mating hole 213 of the power board 21 and soldered to the power board 21. An electrical connection is formed between the fan terminal block 23 and the power board 21. A fan terminal 35 is located on the end of the fan terminal block 23 facing away from the third connecting pin.

[0117] The fan terminal block 35 is located at the end of the fan terminal block 23 facing away from the power supply board 21.

[0118] In this way, the third connecting pin of the fan terminal block 23 is inserted into the third mating hole of the power board 21 and soldered to the power board 21. This ensures a stable and fixed connection between the power board 21 and the fan terminal block 23, and also allows the fan terminal block 23 to be electrically connected to the power board 21 via the third connecting pin. Simultaneously, the fan drive circuit can be electrically connected to the fan terminal block 35 via the power board 21 and the fan terminal block 23.

[0119] In one illustrative embodiment, such as Figure 3 , 4 As shown, the multiple wiring terminals 3 also include a power cord terminal 31 and a communication cord terminal 32. The power cord terminal 31 is soldered onto the control board 2. The power cord terminal 31 is used to connect the power cord of the indoor unit of the air conditioner. This power cord is a wire that supplies power to the indoor unit of the air conditioner. One end of the power cord terminal 31 is connected to the mains power grid. The power cord terminal 31 is located on the side of the housing 1. The wiring opening 10 includes a power wiring opening 101. The power wiring opening 101 is located on the side of the housing 1. The power cord terminal 31 is exposed on the side of the housing 1 through the power wiring opening 101.

[0120] The communication line terminal 32 is soldered onto the control board 2. The communication line terminal 32 is used to connect the communication line of the indoor unit of the air conditioner. In this embodiment, at least two communication line terminals 32 are provided. One communication line terminal 32 is connected to the outdoor unit of the air conditioner via a communication line, and the other communication line terminal 32 is connected to the wired controller via a communication line. The communication line terminal 32 is located on the side of the housing 1. The wiring opening 10 includes a communication wiring opening 102. The communication wiring opening 102 is located on the side of the housing 1. The communication line terminal 32 is exposed on the side of the housing 1 through the communication wiring opening 102.

[0121] In this way, the power cord terminal 31 and the communication line terminal 32 are both located on the side of the box 1 and exposed from the side of the box 1. The power cord and the communication line can be connected to the power cord terminal 31 and the communication line terminal 32 of the control box 100 respectively without opening the box 1 of the control box 100. At the same time, the power cord terminal 31 and the communication line terminal 32 can be quickly identified during the wiring process, which can prevent the power cord with high voltage properties from being connected to the communication line with low voltage properties and thus prevent damage to the control board 2.

[0122] In one illustrative embodiment, the power line terminal 31 and the communication line terminal 32 are both located on the same side of the housing 1. Both the power line terminal 31 and the communication line terminal 32 are constructed as screw-type terminals. Screw-type terminals have a screw and a clamping block; rotating the screw pushes the clamping block down, thereby clamping the wire. Screw-type terminals provide high reliability for wire connections, ensuring a stable electrical connection through screw fastening and preventing loosening due to vibration, impact, or other factors.

[0123] With the power cord terminal 31 and the communication cord terminal 32 located on the same side of the housing 1, the communication cord and the power cord can be routed from the same side of the housing 1, which facilitates the management and connection of the communication cord and the power cord.

[0124] In one illustrative embodiment, both the power cord terminal 31 and the communication cord terminal 32 are located at the top of the housing 1. The power cord terminal 31 and the communication cord terminal 32 are exposed through a wiring opening 10 provided at the top of the housing 1.

[0125] The power cord and communication cord can be connected from the top of the housing 1 to the power cord terminal 31 and communication cord terminal 32 respectively, which facilitates the wiring of the power cord terminal 31 and communication cord terminal 32.

[0126] In an illustrative embodiment, such as Figure 5 , 6 As shown, the box body 1 includes a bottom shell 11 and a top cover 12. The bottom shell 11 includes a bottom plate 1111 and a side plate 1112. The side plate 1112 is cylindrical, and the bottom plate 1111 covers the bottom end of the side plate 1112. The bottom plate 1111 can be constructed as a rectangular flat plate, and the side plate 1112 extends along the edge of the bottom plate 1111. An opening is provided at the top of the bottom shell 11, which is surrounded by the top of the side plate 1112.

[0127] The top cover 12 is fixedly connected to the bottom shell 11. The connection between the top cover 12 and the bottom shell 11 can be a snap-fit ​​connection, a screw connection, or ultrasonic welding. The top cover 12 closes onto the opening of the bottom shell 11. The bottom shell 11 and the top cover 12 enclose a cavity that accommodates the electronic control board 2. All wiring openings 10 are located on the top cover 12.

[0128] The power board 21 is laid flat inside the bottom shell 11. The control board 22 and the fan drive module 27 are both located on the side of the power board 21 facing away from the bottom shell 11. The control board 22 and the fan drive module 27 can be partially accommodated in the top cover 12. The fan wiring opening 105 is located on the top of the cover 121 of the top cover 12.

[0129] The housing 1 has a split design with a bottom shell 11 and a top cover 12. The control board 2 can be installed on the bottom shell 11 and then the top cover 12 can be closed on the bottom shell 11, which facilitates the installation of the control board 2. The wiring openings 10 are all located on the top cover 12, and the wiring terminals 3 are exposed from the wiring openings 10 on the top cover 12, which makes it easier to wire the wiring terminals 3.

[0130] In one illustrative embodiment, such as Figure 2 , 6 As shown, the upper cover 12 includes a housing 121 and an insulating protrusion 122. The housing 121 arches away from the bottom housing 11. The housing 121 is constructed as a cover-like structure. The insulating protrusion 122 is constructed as a strip-shaped protrusion. The insulating protrusion 122 is disposed on the outer side wall of the housing 121, and may be located in the middle of the outer side wall. The insulating protrusion 122 extends from one end of the outer side wall of the housing 121 near the bottom housing 11 to the other end of the outer side wall of the housing 121 away from the bottom housing 11.

[0131] The power connection opening 101 and the communication connection opening 102 are two notches on the top cover 12. The power connection opening 101 and the communication connection opening 102 are located outside the cover 121 and on opposite sides of the insulating protrusion 122.

[0132] The power cord terminal 31 extends out of the top cover 12 through the power wiring opening 101 in the direction away from the bottom housing 11. The communication cable terminal 32 extends out of the top cover 12 through the communication wiring opening 102 in the direction away from the bottom housing 11.

[0133] In this way, the insulating protrusion 122 separates the power line terminal 31 and the communication line terminal 32, increasing the creepage distance between the power line terminal 31 and the communication line terminal 32. Even in a humid environment, it is difficult for the power line terminal 31 and the communication line terminal 32 to conduct electricity, thus preventing damage to the electrical components on the control board 2 due to creepage between the power line terminal 31 and the communication line terminal 32.

[0134] In one illustrative embodiment, such as Figure 4As shown, an insulating cover 24 is provided on the control board 2. One or more insulating covers 24 may be provided. The insulating cover 24 extends out of the housing 1 from the communication wiring opening 102 on the top cover 12. Multiple isolation chambers 241 are provided inside the insulating cover 24, and the number of isolation chambers 241 may be two. The isolation chambers 241 are separated from each other. Each isolation chamber 241 has a mounting opening extending from the side of the isolation chamber 241 facing away from the housing 121 to the top of the isolation chamber 241. Multiple communication line terminals 32 are provided, and the multiple communication line terminals 32 are located in different isolation chambers 241.

[0135] In this way, during wiring, the communication cable can extend from the mounting opening of the insulating cover 24 into the isolation chamber 241 of the insulating cover 24 and connect to the communication cable terminal 32. Adjacent communication cable terminals 32 are separated, preventing short circuits between them and thus avoiding damage to the control board 2. Simultaneously, with the insulating cover 24 covering the communication cable terminals 32, workers can easily identify the terminals 3 inside the insulating cover 24 as communication cable terminals 32 based on the appearance of the insulating cover 24, reducing the likelihood of incorrect wiring to the communication cable terminals 32.

[0136] In one illustrative embodiment, such as Figure 4 As shown, an insulating frame 25 is provided on the electrical control board 2. The insulating frame 25 includes multiple insulating plates 251 and connecting plates 252. The insulating plates 251 can be constructed as flat plates, and the insulating plates 251 extend from the power wiring opening 101 of the upper cover 12 of the housing 1. The multiple insulating plates 251 are parallel to each other. The multiple insulating plates 251 are arranged sequentially at intervals along a direction perpendicular to the plate surface of the insulating plates 251. The connecting plates 252 are perpendicular to the insulating plates 251, and the connecting plates 252 are located at the same end of the insulating plates 251, and the connecting plates 252 are fixedly connected to all the insulating plates 251.

[0137] Multiple power cord terminals 31 are provided, with one power cord terminal 31 provided between each two adjacent insulating plates 251.

[0138] The two adjacent power cord terminals 31 are separated from each other by the insulating plate 251, which can prevent short circuits between the power cord terminals 31 and damage to the control board 2. At the same time, the power cord terminals 31 are located inside the insulating frame 25, so when wiring, the staff can identify the wiring terminal 3 inside the insulating frame 25 as the power cord terminal 31 based on the appearance of the insulating frame 25, making it less likely for the power cord terminals 31 to be connected incorrectly.

[0139] In one illustrative embodiment, such as Figure 5 , 6As shown, the cover 121 of the upper cover 12 has a first through hole 123. The first through hole 123 can be a circular hole. The bottom cover 11 has a second through hole 111. The second through hole 111 can also be a circular hole. The first through hole 123 and the second through hole 111 are coaxially arranged.

[0140] like Figure 4 As shown, the power board 21 of the control board 2 has a third through hole 210. The third through hole 210 can be a circular hole. The third through hole 210 is coaxially arranged with the first through hole 123 and the second through hole 111. Since the control board 2 is located inside the housing 1, the third through hole 210 is located between the first through hole 123 and the second through hole 111. The power board 21 of the control board 2 also has a grounding terminal for grounding. The grounding terminal can be constructed as a pad or as a solder joint. The grounding terminal is located around the end of the third through hole 210 near the top cover 12. The diameter of the second through hole 111 is equal to the diameter of the first through hole 123. The diameter of the third through hole 210 is smaller than the diameter of the first through hole 123.

[0141] The electrical control box 100 also includes a grounding screw (not shown in the figure). The grounding screw is a metal screw. The grounding screw includes a head and a shank, one end of which is connected to the head. The diameter of the head is larger than the diameter of the shank. The diameter of the grounding screw head is smaller than the diameter of the first through hole 123 on the top cover 12, but larger than the diameter of the third through hole 210 on the power board 21. The diameter of the grounding screw shank is smaller than the diameter of the third through hole 210 and also smaller than the diameter of the second through hole 111. The head of the grounding screw abuts against the grounding terminal. The shank of the grounding screw passes through the second through hole 111 on the electrical control board 2 and the third through hole 210 on the bottom shell 11.

[0142] The sheet metal casing of the indoor air conditioner unit has screw holes, and the sheet metal is grounded. The screw holes on the sheet metal are coaxially aligned with the second through hole 111 on the bottom casing 11.

[0143] During the installation of the electrical control box 100 into the housing, first align the second through hole 111 on the electrical control box 100 with the screw hole on the sheet metal part of the housing. Then, pass the shank of the grounding screw through the first through hole 123 of the upper cover 12, the third through hole 210 of the electrical control board 2, and the second through hole 111 of the bottom shell 11, and screw it into the screw hole of the sheet metal part of the housing until the head of the grounding screw abuts against the grounding terminal. This grounding screw electrically connects the grounding terminal of the electrical control box 100 to the grounded sheet metal part of the housing, thereby grounding the electrical control board 2. Using this grounding wiring method, it is not necessary to open the box 1 of the electrical control box 100, making wiring more convenient and faster, and avoiding incorrect wiring of the grounding terminal.

[0144] In one illustrative embodiment, such as Figure 1As shown, the box body 1 is also provided with a heat dissipation opening 13. The heat dissipation opening 13 can be constructed as a rectangular opening that penetrates the wall of the box body 1.

[0145] The fan drive module 27 is housed within the housing 1. The fan drive module 27 also includes a protective shell 272 and a radiator 271. The protective shell 272 can be constructed as a box-shaped structure, with an opening on one side. One side of the radiator 271 covers the opening of the protective shell 272 to seal it, and the other side of the radiator 271 covers the heat dissipation opening 13 of the housing 1. The radiator 271 can be constructed as a finned radiator, with the finned side covering the heat dissipation opening 13. The fan drive board is housed within the protective shell 272, and the protective shell 272, radiator 271, and protective shell 272 are connected together by screws. The fan drive board abuts against the side of the radiator 271 facing away from the heat dissipation opening 13 of the housing 1. The fan drive board is electrically connected to the fan terminal 35. The fan drive board can output drive current to the fan terminal 35 to drive the fan.

[0146] When the fan drive board is working, it generates a lot of heat. This heat is transferred to the heat sink 271 and then directly transferred to the air outside the box 1 through the heat sink 271. This keeps the temperature inside the electrical control box 100 at a suitable temperature and prevents the electrical components inside the electrical control box 100 from becoming too hot and causing them to malfunction.

[0147] In one illustrative embodiment, such as Figure 7 As shown, the fan drive module 27 also includes an insulating component 273. The insulating component 273 is made of insulating material. The protective shell 272 has a thin-shell structure. An inner cavity is provided inside the protective shell 272 to accommodate the fan drive plate. The opening of the protective shell 272 can be a rectangular opening. The opening of the protective shell 272 is located on one side of the inner cavity of the protective shell 272 and communicates with the inner cavity.

[0148] The insulating element 273 can be configured as a straight strip. The insulating element 273 is located at the bottom end of the heat sink 271 and extends along the bottom end of the heat sink 271. The insulating element 273 is sandwiched between the heat sink 271 and the power board 21. The insulating element 273 and the heat sink 271 together cover the opening 2721 of the protective shell 272. The insulating element 273 is also connected to the protective shell 272. The connection between the insulating element 273 and the protective shell 272 can be a snap-fit ​​connection. For example, male snaps are provided at both opposite ends of the insulating element 273, and two female snaps are provided on each of the opposite side walls of the protective shell 272, with the two male snaps inserted into the two female snaps respectively.

[0149] The insulating component 273 is disposed at the bottom of the heat sink 271 and is located between the heat sink 271 and the power board 21. The insulating component 273 can separate the heat sink 271 of the fan drive module 27 from the power board 21, which can prevent the heat sink 271 from coming into contact with the power board 21 of the fan drive module 27 over a large area, thus preventing leakage and short circuit of the power board 21. At the same time, it increases the creepage distance between the heat sink 271 and the power board 21, thereby improving safety performance.

[0150] In one illustrative embodiment, a plurality of supports 2713 are provided on the heat sink 271. The supports 2713 may be straight or cylindrical. The supports 2713 are located at the bottom end of the heat sink 271.

[0151] The insulating member 273 is provided with a plurality of clearance openings 2734. The clearance openings 2734 can be constructed as through holes or grooves, and extend from the side of the insulating member 273 near the heat sink 271 to the side of the insulating member 273 opposite to the heat sink 271. The clearance openings 2734 allow the supports 2713 of the insulating member 273 to pass through.

[0152] The power board 21 has multiple mounting holes. The multiple mounting holes on the power board 21 are aligned with the multiple clearance openings 2734 on the insulating component 273.

[0153] The support column 2713, the clearance opening 2734 on the insulating component 273, and the mounting hole on the power board 21 are all correspondingly provided. Each support column 2713 passes through the clearance opening 2734 of the insulating component 273 corresponding to it and is inserted into the mounting hole on the power board 21 corresponding to it, thereby achieving a fixed connection between the support column 2713 and the power board 21. The support column 2713 can support the heat sink 271, allowing the heat sink 271 to be installed more stably.

[0154] In one illustrative embodiment, the location of the heat dissipation opening 13 is not limited; the heat dissipation opening 13 can be located on the side, top, or bottom surface of the housing 1. The area of ​​the heat dissipation opening 13 occupies more than 70% of the area of ​​the side, top, or bottom surface of the housing 1 where it is located. In this embodiment, the heat dissipation opening 13 is located on one side of the housing 1.

[0155] In one illustrative embodiment, the plurality of terminals 3 further includes an auxiliary electric heating terminal 33. The auxiliary electric heating terminal 33 is soldered onto the control board 2. The auxiliary electric heating terminal 33 is used to connect the wires of the electric heater of the indoor unit of the air conditioner. The auxiliary electric heating terminal 33 is located on the side or top of the housing 1. The wiring opening 10 includes a load wiring opening 103. The load wiring opening 103 may be located on the side or top of the housing 1. The auxiliary electric heating terminal 33 is exposed outside the housing 1 through the load wiring opening 103. In one embodiment, the load wiring opening 103 is located on the top of the cover 121.

[0156] In this way, the electric auxiliary heating terminal 33 is located on the top or side of the box 1 and is exposed from the top or side of the box 1. The wires of the electric heater can be connected to the electric auxiliary heating terminal 33 of the control box 100 without opening the box 1 of the control box 100. At the same time, the electric auxiliary heating terminal 33 can be quickly identified during the wiring process, which can prevent incorrect wiring on the electric auxiliary heating terminal 33 from damaging the control board 2.

[0157] In one illustrative embodiment, the control board 2 includes an insulating housing 261 and a switching circuit 215. The switching circuit 215 includes a relay. The switching circuit 215 is disposed within the insulating housing 261. The insulating housing 261 is located below the load wiring opening 103 of the housing 1. The auxiliary heating terminal 33 is configured as a plug-in interface. One end of the auxiliary heating terminal 33 facing inwards from the housing 1 is connected to the top of the insulating housing 261, and the other end of the auxiliary heating terminal 33 facing outwards from the housing 1 is located within the load wiring opening 103 of the housing 1. The switching circuit 215 is electrically connected to the power line terminal 31 and the auxiliary heating terminal 33. The switching circuit 215 is used to connect and disconnect the circuit between the power line terminal 31 and the auxiliary heating terminal 33, thereby enabling the switching of the electric heater of the indoor unit of the air conditioner.

[0158] In this way, the auxiliary heating terminal 33 is constructed as a plug-in interface, and the wires of the electric heater can be easily plugged into the auxiliary heating terminal 33. At the same time, the end of the auxiliary heating terminal 33 facing out of the box 1 is located inside the load wiring opening 103 of the box 1, and the end of the auxiliary heating terminal 33 facing out of the box 1 is basically flush with the box 1. This makes it easy for the staff to identify the auxiliary heating terminal 33, and at the same time, the auxiliary heating terminal 33 will not protrude from the box 1. The box 1 can protect the auxiliary heating terminal 33 from damage.

[0159] In one illustrative embodiment, the wiring opening 10 on the housing 1 includes a low-voltage wiring opening 104. The plurality of wiring terminals 3 include a plurality of low-voltage wiring terminals 34. At least three low-voltage wiring terminals 34 are respectively used to connect the wires of the temperature sensor, the wires of the electronic expansion valve, and the wires of the display panel.

[0160] The low-voltage wiring opening 104 can be located on the top of the housing 1, with multiple low-voltage wiring terminals 34 also located on the top of the housing 1, and the multiple low-voltage wiring terminals 34 exposed outside the housing 1 through the low-voltage wiring opening 104 located on the top of the housing 1. Alternatively, the low-voltage wiring opening 104 can be located on the side of the housing 1, with multiple low-voltage wiring terminals 34 also located on the side of the housing 1, and the multiple low-voltage wiring terminals 34 exposed outside the housing 1 through the low-voltage wiring opening 104 located on the side of the housing 1.

[0161] In this way, the low-voltage wiring terminal 34 is located on the top or side of the box 1 and is exposed from the top or side of the box 1. The wires can be connected to the corresponding low-voltage wiring terminal 34 of the control box 100 without opening the box 1 of the control box 100. At the same time, the low-voltage wiring terminal 34 can be quickly identified during the wiring process, which can prevent incorrect wiring on the low-voltage wiring terminal 34 from damaging the control board 2.

[0162] In one illustrative embodiment, the low-voltage terminal 34 is configured as a plug-in interface. One end of the low-voltage terminal 34 faces outward from the housing 1 and is located within the low-voltage wiring opening 104.

[0163] In this way, the low-voltage terminal 34 is constructed as a plug-in interface, and the wires of the temperature sensor, the electronic expansion valve, and the display panel can be easily plugged into the corresponding low-voltage terminal 34. At the same time, the end of the low-voltage terminal 34 facing out of the box 1 is located inside the load wiring opening 103 of the box 1, and the end of the low-voltage terminal 34 facing out of the box 1 is basically flush with the box 1. This makes it easy for staff to identify the low-voltage terminal 34, and at the same time, the low-voltage terminal 34 will not protrude from the box 1. The box 1 can protect the low-voltage terminal 34 from damage.

[0164] In one illustrative embodiment, the power line terminal 31, communication line terminal 32, insulating cover 24, insulating frame 25, insulating shell 261, and switching circuit 215 are all disposed on the side of the power board 21 facing away from the bottom shell 11. The power line terminal 31, communication line terminal 32, insulating cover 24, and insulating frame 25 may be disposed at the same end of the power board 21. A third through hole 210 is disposed on the power board 21 and penetrates the power board 21 perpendicularly.

[0165] Multiple low-voltage wiring terminals 34 are located on one end of the control board 22 facing away from the first connecting pin 221. The multiple low-voltage wiring terminals 34 are arranged sequentially at intervals along the edge of the control board 22.

[0166] like Figure 10 , 11As shown, the power supply board 21 also includes a filter and rectifier circuit 216 and a power supply circuit 214. The fan drive board also includes a fan drive circuit. The control board 22 also includes a main control circuit 222, a communication circuit 225, a sensor circuit 223, and a valve drive circuit 224. The main control circuit 222 is a microcomputer or a single-chip microcomputer.

[0167] Power cord terminal 31 is connected to the power cord and is used to power the entire electrical control box 100. Power cord terminal 31 is electrically connected to the switching circuit 215 and the filter rectifier circuit 216. Switching circuit 215 is connected to the electric heater via electric auxiliary heating terminal 33. Switching circuit 215 is electrically connected to the main control circuit 222, and the main control circuit 222 can switch the electric heater on and off via switching circuit 215.

[0168] Power line terminal 31 is electrically connected to filter and rectifier circuit 216, which is electrically connected to the fan drive circuit on the fan drive board. Filter and rectifier circuit 216 rectifies and filters the AC power input from power line terminal 31 into DC power, and then supplies this DC power to the fan drive circuit on the fan drive board and the power circuit 214 on the power board 21. Filter and rectifier circuit 216 can also be configured to suppress common-mode noise, reduce interference from the frequency converter circuit to the power grid, ensure grid stability, and reduce electromagnetic interference to the grid.

[0169] The fan drive circuit is electrically connected to the main control circuit 222. The fan drive circuit is controlled by the main control circuit 222 and converts the DC power output from the filter rectifier circuit 216 into the fan drive current. This drive current is then transmitted to the fan through the fan terminal 35 to drive the fan. In some embodiments, the fan of the indoor unit of the air conditioner is a DC motor, and the fan drive circuit is a square wave drive circuit, a sine wave drive circuit, or a brushless DC motor (BLDC) drive circuit.

[0170] The power supply circuit 214 can be an AC-DC switching power supply circuit. The power supply circuit 214 is electrically connected to the main control circuit 222 and the power line terminal 31. The power supply circuit 214 can convert the industrial frequency AC power input to the power line terminal 31 into DC power to power the circuits on the main control board 22, for example, to power the main control circuit 222. The voltage of the DC power is less than or equal to 36V, and the DC power can be 5V, 8V, 12V or 24V.

[0171] Communication circuit 225, sensor circuit 223, and valve drive circuit 224 are all electrically connected to main control circuit 222. Communication circuit 225 enables data transmission and communication between main control circuit 222 and the controller and wired controller of the outdoor unit of the air conditioner. Communication circuit 225 is connected to the outdoor unit and the wired controller via two communication line terminals 32. Communication circuit 225 is used for communication with the controller of the outdoor unit of the air conditioner and for communication with the wired controller. Main control circuit 222 can transmit information such as temperature setpoint, compressor frequency command, electronic expansion valve opening, fault codes, and sensor measurement data to the controller of the outdoor unit of the air conditioner via RS-485 bus or power line carrier communication through communication circuit 225.

[0172] Sensor circuit 223 is used to collect environmental parameters and convert them into electrical signals for decision-making by the main control circuit. These parameters include temperature and humidity. Sensor circuit 223 is connected to low-voltage terminal 34 and, through terminal 34, to the sensor of the indoor air conditioner. Sensor circuit 223 includes a temperature sampling circuit. The temperature sampling circuit is connected to the temperature sensor through a low-voltage terminal 34. The temperature sampling circuit converts the temperature signal collected by the temperature sensor into an electrical signal and transmits this electrical signal to the main control circuit 222.

[0173] The sensor circuit 223 also includes a humidity sampling circuit. The humidity sampling circuit is connected to the humidity sensor via a low-voltage terminal 34. The humidity sampling circuit is used to convert the humidity signal collected by the humidity sensor into an electrical signal and transmit the electrical signal to the main control circuit 222.

[0174] The valve drive circuit 224 is connected to the electronic expansion valve via a low-voltage terminal 34. The valve drive circuit 224 can be a motor drive circuit. The valve drive circuit 224 is controlled by the main control circuit 222 to output drive current to the electronic expansion valve to adjust its opening degree.

[0175] In one illustrative embodiment, such as Figure 8 As shown, the control box 100 also includes a first sealant layer 41. The first sealant layer 41 fills the gap between the bottom shell 11 and the surface of the power board 21 facing away from the control board 22. The first sealant layer 41 can be formed by potting adhesive into the gap between the bottom shell 11 and the power board 21, and the potting adhesive can be UV adhesive. The first sealant layer 41 fills the gap between the bottom shell 11 and the power board 21, preventing water and dust from entering the gap and causing damage to the power board 21, thus improving the reliability of the power board 21.

[0176] In one illustrative embodiment, such as Figure 5As shown, an isolation ring 112 is also provided on the side of the bottom shell 11 near the power board 21. The isolation ring 112 is constructed as an annular protrusion, and the isolation ring 112 can be circular. The isolation ring 11 and the bottom shell 11 can be integrally formed. One end of the isolation ring 112 surrounds the second through hole 111 on the bottom shell 11, and the isolation ring 112 can be coaxially arranged with the second through hole 111. The other end of the isolation ring 112 abuts against the surface of the power board 21 facing away from the control board 22. The end of the isolation ring 112 that abuts against the power board 21 surrounds the third through hole 210 on the power board 21.

[0177] In this way, when the potting compound is filled into the gap between the base shell 11 and the power board 21, the potting compound will not flow into the second through hole 111. This ensures that the second through hole 111 is unobstructed, allowing the grounding screw to pass through the second through hole 111, while also ensuring that the potting compound does not overflow from the second through hole 111.

[0178] In one illustrative embodiment, such as Figure 8 As shown, the control box 100 also includes a second sealant layer 42. The second sealant layer 42 covers the surface of the power board 21 facing the control board 22. Potting compound can be applied to the surface of the power board 21 facing the control board 22 using a potting method, and the second sealant layer 42 is formed after the potting compound solidifies. The potting compound can be a UV adhesive. The second sealant layer 42 completely covers the surface of the power board 21 facing the control board 22. The thickness of the second sealant layer 42 is sufficient to completely cover the pins of all electronic components on the surface of the power board 21 facing the control board 22. The second sealant layer 42 encapsulates all the pins of the electronic components on the surface of the power board 21.

[0179] In this way, the second sealant layer 42 can isolate the air from the power board 21, preventing moisture and dust from damaging the power board 21. At the same time, the second potting layer encapsulates the pins of the electronic components on the surface of the power board 21, which can improve the electrical insulation performance and prevent the electronic components from falling off when the control box 100 vibrates, further improving the reliability of the power board 21.

[0180] In one illustrative embodiment, such as Figure 4 , 9As shown, the electrical control box 100 also includes a sealant-retaining cylinder 5. The sealant-retaining cylinder 5 is disposed on the surface of the power board 21 facing away from the bottom shell 11. The sealant-retaining cylinder 5 includes a cylindrical body 51 and a connecting post 52. One end of the connecting post 52 is connected to the cylindrical body 51, and the other end is connected to the power board 21. The connecting post 52 can be inserted into the power board 21. The cylindrical body 51 has a cylindrical structure. One end of the cylindrical body 51 abuts against the surface of the power board 21 facing the control board 22. The cylindrical body 51 surrounds the third through hole 210 of the power board 21. The axial height of the cylindrical body 51 is greater than the thickness of the second sealant layer 42. The second sealant layer 42 is located outside the cylindrical body 51.

[0181] In this way, when the potting compound is delivered to the surface of the power board 21 facing the control board 22, the potting compound can be prevented from entering the third through hole 210 of the power board 21, ensuring that the third through hole 210 is unobstructed, so that the screw of the grounding screw can pass smoothly through the third through hole 210 during subsequent installation.

[0182] In one illustrative embodiment, the grounding terminal can be configured as an annular pad surrounding the third through hole 210. The inner diameter of the adhesive-blocking sleeve 5 is set to be larger than the outer diameter of the grounding terminal to prevent the adhesive-blocking sleeve 5 from covering the grounding terminal and to prevent the grounding screw from failing to effectively abut against the grounding terminal.

[0183] In one illustrative embodiment, such as Figure 6 As shown, a guide tube 124 is also provided on the cover 121 of the upper cover 12. The guide tube 124 is constructed as a straight cylindrical structure. The guide tube 124 extends from the first through hole 123 of the upper cover 12 to the end of the glue-blocking tube 5 facing away from the power board 21. The end of the guide tube 124 away from the upper cover 12 abuts against the end of the glue-blocking tube 5 away from the third through hole 210. The guide tube 124 and the glue-blocking tube 5 are coaxially arranged. The diameter of the guide tube 124 and the glue-blocking tube 5 is the same. The end of the guide tube 124 near the first through hole 123 on the upper cover 12 is fixed to the cover 121, and the guide tube 124 and the cover 121 can be an integrally formed structure.

[0184] In this way, when installing the grounding screw, the grounding screw is inserted into the guide tube 124 through the first through hole 123. The grounding screw can slide into the third through hole 210 along the guide tube 124 and the rubber-blocking tube 5, making the installation of the grounding screw more convenient.

[0185] In another illustrative embodiment, such as Figure 12 , 13As shown, the control board 2 includes an insulating housing 261 and a switching circuit 215. The switching circuit 215 may include a relay. The switching circuit 215 is disposed inside the insulating housing 261. The top of the insulating housing 261 seals the load wiring opening 103a of the housing 1. The electric auxiliary heating terminal 33 is connected to the top of the insulating housing 261 and extends out of the housing 1 from the load wiring opening 103a. The switching circuit 215 is electrically connected to the power line terminal 31 and the electric auxiliary heating terminal 33. The switching circuit 215 is used to connect and disconnect the circuit between the power line terminal 31 and the electric auxiliary heating terminal 33, thereby enabling the switching of the indoor unit's electric heater.

[0186] The insulating shell 261 seals the load wiring opening 103a of the box body 1, which can prevent water and dust from entering the box body 1 through the load wiring opening 103a, thereby improving the protective performance of the box body 1.

[0187] In another illustrative embodiment, such as Figure 12 , 13 As shown, all wiring terminals 3 extend out of the housing 1 through wiring openings 10a. In this embodiment, the multiple wiring terminals 3 include an electric auxiliary heating wiring terminal 33, a low-voltage wiring terminal 34, a power line terminal 31, a communication line terminal 32, and a fan wiring terminal 35. The electric auxiliary heating wiring terminal 33 extends out of the housing 1 through a load wiring opening 103a, the low-voltage wiring terminal 34 extends out of the housing 1 through a low-voltage wiring opening 104a, the power line terminal 31 extends out of the housing 1 through a power line wiring opening 101a, the communication line terminal 32 extends out of the housing 1 through a communication wiring opening 102a, and the fan wiring terminal 35 extends out of the housing 1 through a fan wiring opening 105a.

[0188] Since all the wiring terminals 3 extend out of the box 1 through the wiring opening 10a, the wiring terminals 3 occupy little internal space in the box 1, which can reduce the volume occupied by the box 1, increase the airflow area of ​​the air duct of the air conditioner indoor unit, reduce the air resistance in the air duct, and thus increase the air volume of the air conditioner indoor unit.

[0189] In one illustrative embodiment, a metal shielding layer is further provided on the housing 1. The metal shielding layer is a membrane structure made of metal. The metal shielding layer covers the outer wall of the housing 1. The metal shielding layer may completely cover the outer wall of the housing 1.

[0190] When the circuitry inside the control box operates, it generates electromagnetic radiation. The metal shielding layer absorbs these electromagnetic waves, preventing them from leaking into the external environment and interfering with other electrical equipment. Simultaneously, the metal shielding layer also prevents external electromagnetic waves from entering the box, avoiding interference with sensitive internal circuits. Grounding the metal shielding layer to the system ground (GND) creates a Faraday cage effect, diverting interference signals through the grounding path and reducing the impact of common-mode noise and potential differences on the internal circuitry. Furthermore, the metal shielding layer enhances the mechanical strength of the box, reducing the likelihood of damage from physical impacts.

[0191] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this application.

[0192] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of those features.

[0193] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0194] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0195] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0196] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0197] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An electric control box of an air conditioner indoor unit, characterized by comprising: include: Box body (1); The electrical control board (2), housed in the housing (1), includes a power board (21), a control board (22), and a fan drive module (27), wherein the fan drive module (27) includes a fan drive board; The control board (22) and the fan drive board are located on one side of the power supply board (21) and are both electrically connected to the power supply board (21). The power supply board (21) is configured to convert AC power into DC power to supply power to the control board (22) and the fan drive board. The control board (22) is the logic control unit of the air conditioner indoor unit. The fan drive board is configured to drive the fan of the air conditioner indoor unit under the control of the control board (22).

2. The electric control box according to claim 1, wherein The power board (21) is located at the bottom of the box (1), and the control board (22) and the fan drive board are both located on the side of the power board (21) near the top of the box (1). The control board (22) is fixedly connected to the power board (21) and perpendicular to the power board (21), and the fan drive board is fixedly connected to the power board (21) and perpendicular to the power board (21).

3. The electric control box according to claim 2, wherein The power board (21) is provided with a first docking hole (211), and the control board (22) is provided with a first connecting pin (221) inserted into the first docking hole (211), the first connecting pin (221) being soldered to the power board (21); and / or, The power board (21) is provided with a second docking hole (212), and one end of the fan drive board is provided with a second connecting pin inserted into the second docking hole (212), and the second connecting pin is welded to the power board (21).

4. The electric control box according to claim 3, wherein Both the first docking hole (211) and the second docking hole (212) are configured as through holes, and the first docking hole (211) and the second docking hole (212) are respectively close to two sides of the power board (21); The two sides are the two adjacent sides of the power board (21) or the two opposite sides of the power board (21).

5. The electrically controlled box according to claim 1, wherein, The control board (22) is placed flat on the power board (21); and / or, The fan drive module (27) is placed flat on the power board (21).

6. The electric control box according to claim 5, wherein The wall of the box (1) is provided with heat dissipation openings (13); The fan drive module (27) also includes a radiator (271) that abuts against the fan drive plate, and the radiator (271) covers the heat dissipation opening (13).

7. The electrical control box according to any one of claims 1 to 6, characterized in that, The control board (22) is equipped with a main control circuit (222); The fan drive board is equipped with a fan drive circuit. The power board (21) is provided with a power supply circuit (214) and a filter and rectifier circuit (216); The power supply circuit (214) is electrically connected to the main control circuit (222) and is used to convert the power frequency AC power into DC power to be supplied to the main control circuit (222); The filter rectifier circuit (216) is electrically connected to the fan drive circuit and is used to convert the power frequency AC power into DC power to be supplied to the fan drive board. The fan drive circuit is used to convert the DC power output by the filter rectifier circuit (216) into the drive current of the fan.

8. The electric control box according to claim 7, wherein The power board (21) is also provided with a switching circuit (215), which is used to switch the electric heater of the indoor unit of the air conditioner. The control board (22) is also provided with a communication circuit (225), a sensor circuit (223) and a valve drive circuit (224) that are electrically connected to the main control circuit (222). The communication circuit (225) is used to realize data transmission and communication between the main control circuit (222) and the controller and wired controller of the outdoor unit of the air conditioner, respectively. The valve drive circuit (224) is used to output drive current to the electronic expansion valve of the indoor unit of the air conditioner to adjust the opening of the electronic expansion valve. The sensor circuit (223) is used to collect environmental parameters and convert them into electrical signals for the main control circuit (222) to make decisions.

9. The electrical control box according to claim 8, characterized in that, The electrical control box (100) includes multiple wiring terminals (3); Multiple wiring terminals (3) include power line terminals (31), communication line terminals (32), electric auxiliary heating terminals (33) disposed on the power board (21) and multiple low-voltage wiring terminals (34) disposed on the control board (22); The power cord terminal (31) is electrically connected to the power circuit (214), the filter rectifier circuit (216) and the switch circuit (215) for connecting the power cord of the indoor unit of the air conditioner; The communication line terminal (32) is electrically connected to the communication circuit (225) and is used to connect the communication line of the indoor unit of the air conditioner; The electric auxiliary heating terminal (33) is electrically connected to the switching circuit (215) and is used to connect the wire of the electric heater of the indoor unit of the air conditioner; The sensor circuit (223) is connected to the low-voltage terminal (34) of the sensor used to connect to the indoor unit of the air conditioner; The valve drive circuit (224) is connected to the low-voltage terminal (34) for connecting the electronic expansion valve.

10. The electrical control box according to any one of claims 1 to 6, wherein, The power board (21) is provided with a third docking hole (213); The electrical control board (2) also includes a fan terminal board (23) with a third connecting pin, wherein the third connecting pin is inserted into the third docking hole (213) and soldered to the power board (21); The electrical control box (100) also includes a fan terminal (35) disposed on the fan terminal block (23), and the fan terminal (35) is electrically connected to the fan terminal block (23).

11. The electrical control box according to any one of claims 1 to 6, characterized in that It also includes a first sealant layer (41) that fills the gap between the power board (21) and the bottom wall of the housing (1).

12. The electric control box according to claim 11, wherein, It also includes a second sealant layer (42) that covers the surface of the power board (21) facing the control board (22).

13. The electric control box according to claim 12, wherein The second sealant layer (42) completely covers the pins of all electronic components on the power board (21) facing the control board (22).

14. The electrically controlled box according to claim 12, wherein, The box (1) includes: The bottom shell (11) has an opening at its top; and, The top cover (12) is connected to the bottom shell (11) and covers the opening of the bottom shell (11); The bottom shell (11) and the top cover (12) enclose a cavity for accommodating the electronic control board (2), and the power board (21) is disposed inside the bottom shell (11).

15. The electrical control box according to claim 14, characterized in that, The upper cover (12) is provided with a first through hole (123), and the bottom shell (11) is provided with a second through hole (111) coaxial with the first through hole (123); The electronic control board (2) is provided with a third through hole (210) coaxial with the first through hole (123) and a grounding terminal for grounding; The grounding terminal is located around the end of the third through hole (210) near the first through hole (123); The electrical control box (100) also includes a grounding screw; The grounding screw includes a head that abuts against the grounding terminal and has a diameter smaller than the first through hole (123) and a screw rod with one end connected to the head and passing through the second through hole (111) and the third through hole (210).

16. The electrically controlled box according to claim 15, wherein, An isolation ring (112) is also provided on the side of the bottom shell (11) near the power board (21); One end of the isolation ring (112) surrounds the second through hole (111), and the other end abuts against the surface of the power board (21).

17. The electrically controlled box of claim 15, wherein, It also includes a rubber baffle (5); The sealant tube (5) includes a tube body (51), one end of which abuts against the surface of the power board (21) facing the control board (22) and surrounds the third through hole (210). The height of the tube body (51) in its axial direction is greater than the thickness of the second sealant layer (42).

18. The electrically controlled box of claim 17, wherein, The rubber-blocking cylinder (5) also includes a connecting post (52), one end of which is connected to the cylinder body (51), and the other end is inserted into the power board (21).

19. The electrically controlled box of claim 17, wherein, The upper cover (12) is also provided with a guide tube (124) extending from the first through hole (123) to the rubber-blocking tube (5); The rubber-blocking cylinder (5) is coaxially arranged with the guide cylinder (124).

20. The electrically controlled box of claim 17, wherein, The grounding terminal is constructed as an annular pad surrounding the third through hole (210), and the inner diameter of the adhesive-blocking cylinder (5) is set to be larger than the outer diameter of the grounding terminal.

21. The electrically controlled box according to claim 1, wherein, The box (1) is provided with a metal shielding layer that covers the outer wall of the box (1).

22. The electrically controlled box of claim 6, wherein, The fan drive module (27) also includes a protective shell (272) and an insulating component (273) connected to the protective shell (272); The insulating component (273) is sandwiched between the heat sink (271) and the power board (21); The protective shell (272) is provided with an inner cavity for accommodating the fan drive plate and an opening on one side of the inner cavity. The radiator (271) and the insulating member (273) together cover the opening of the protective shell (272).

23. The electrically controlled box of claim 22, wherein, The insulating component (273) is provided with a clearance opening (2734), and the power board (21) is provided with a mounting hole aligned with the clearance opening (2734); The bottom end of the radiator is provided with a support column (2713), which passes through the relief opening (2734) and is inserted into the mounting hole.

24. An air conditioner indoor unit characterized by comprising: Includes the electrical control box (100) as described in any one of claims 1 to 23.

25. An air conditioner characterized by comprising: Including the air conditioning indoor unit as described in claim 24.

Images