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, and the electric control box comprises a box body provided with a plurality of wiring openings; the electric control board is accommodated in the box body; the transmitted voltage of the weak current wiring terminal is smaller than or equal to 36V, and the weak current wiring terminal is connected to the electric control board; the transmitted voltage of the strong current wiring terminal is greater than 36V, and the strong current wiring terminal is connected to the electric control board; wherein the weak current wiring terminal and the strong current wiring terminal are exposed through the plurality of wiring openings, and the strong current wiring terminal and the weak current wiring terminal are respectively located at two opposite sides of the box body. The technical problem to be solved by the utility model is how to reduce the possibility of misoperation of wiring of the control box.

Description

[0001] This application claims priority to Chinese patent application No. 202510495665.2, filed on April 18, 2025, entitled "An air conditioner, an indoor unit of an air conditioner, an electrical control box and an assembly method", the contents of which shall be construed 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, the traditional electrical control box structure has significant drawbacks during installation, debugging, and subsequent maintenance. Operators must open the control box cover to directly connect wires and perform adjustments to the control board. This method greatly increases the possibility of misoperation; any error can easily damage the control board, increasing repair costs and negatively impacting the user experience. Utility Model Content

[0004] The technical problem this application aims to solve is how to reduce the possibility of misoperation in the wiring of the control box.

[0005] This application discloses an electrical control box for an indoor unit of an air conditioner, comprising:

[0006] The box body has multiple wiring openings;

[0007] The electronic control board is housed within the housing;

[0008] The low-voltage wiring terminal, which transmits a voltage less than or equal to 36V, is connected to the electrical control board;

[0009] A high-voltage terminal block, which transmits a voltage greater than 36V, is connected to the electrical control board;

[0010] The low-voltage wiring terminals and the high-voltage wiring terminals are exposed through multiple wiring openings, and the high-voltage wiring terminals and the low-voltage wiring terminals are respectively located on opposite sides of the housing.

[0011] In one illustrative embodiment, the high-voltage terminal block includes a power cord terminal block for connecting the power cord of the indoor unit of the air conditioner;

[0012] The low-voltage wiring terminal includes a communication line terminal, which is used to connect the communication line of the indoor unit of the air conditioner.

[0013] Both the power line terminal and the communication line terminal are located on the side of the housing.

[0014] In one illustrative embodiment, the power line terminal and the communication line terminal are located at opposite ends of the same side of the housing; or,

[0015] The power line terminal and the communication line terminal are located on opposite sides of the housing.

[0016] In one illustrative embodiment, the housing includes:

[0017] The bottom shell has an opening at its top; and,

[0018] The top cover connects to the bottom shell and covers the opening of the bottom shell;

[0019] The bottom shell and the top cover enclose a cavity for accommodating the electronic control board, and at least part of the wiring openings are located on the top cover.

[0020] In one illustrative embodiment, the bottom shell includes cylindrical side plates and a bottom plate covering the bottom end of the side plates, with the opening of the bottom shell located at the top end of the side plates;

[0021] The top cover includes:

[0022] The casing, arching away from the bottom shell, covers the top of the side plate; and,

[0023] Insulating protrusions are provided on the outer side wall of the housing;

[0024] The plurality of wiring openings include power wiring openings and communication wiring openings. The power wiring opening is a notch formed by the outer side wall of the housing on one side of the insulating protrusion and the insulating protrusion. The communication wiring opening is a notch formed by the outer side wall of the housing on the other side of the insulating protrusion and the insulating protrusion. The power line terminal and the communication line terminal extend out of the housing through the power wiring opening and the communication wiring opening, respectively.

[0025] 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;

[0026] The electronic control board is provided with a third through hole coaxial with the first through hole and a grounding terminal for grounding;

[0027] The grounding terminal is located around the end of the third through hole that is close to the first through hole.

[0028] In one illustrative embodiment, a grounding screw is also included;

[0029] 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.

[0030] In one illustrative embodiment, the electrical control box further includes a first sealant layer that fills the gap between the bottom shell and the power board;

[0031] An isolation ring is also provided on the side of the bottom shell near the power board. The bottom end of the isolation ring surrounds the second through hole, and the top end of the isolation ring abuts against the power board.

[0032] In one illustrative embodiment, a second sealant layer is also included, which covers the surface of the power board opposite to the first sealant layer.

[0033] The second sealant layer completely covers the pins of all electronic components on the power board surface facing away from the first sealant layer.

[0034] In one illustrative embodiment, the high-voltage wiring terminal includes a fan wiring terminal;

[0035] The fan terminal is used to connect the wires of the fan in the indoor unit of the air conditioner;

[0036] The fan terminal is located on the side or top of the housing.

[0037] In one illustrative embodiment, the housing is also provided with heat dissipation openings;

[0038] The electrical control board includes a fan drive module disposed within the housing, and the fan drive module includes:

[0039] The fan drive board includes a fan drive circuit electrically connected to the fan terminals; and...

[0040] The radiator abuts against the fan drive plate and covers the heat dissipation opening.

[0041] In one illustrative embodiment, the wind turbine drive module further includes a protective housing that accommodates the wind turbine drive board;

[0042] An opening is provided on one side of the protective shell, and a heat sink covers the opening of the protective shell.

[0043] In one illustrative embodiment, the heat dissipation opening is located on the side, top, or bottom surface of the housing.

[0044] In one illustrative embodiment, the high-voltage terminal block further includes an electric auxiliary heating terminal block;

[0045] The electric auxiliary heating terminal is used to connect the wires of the electric heater of the indoor unit of the air conditioner;

[0046] The electric auxiliary heating terminal is located on the side or top of the housing.

[0047] In one illustrative embodiment, the plurality of wiring openings include load wiring openings;

[0048] The auxiliary electric heating terminal is configured as a plug-in interface, with one end of the auxiliary electric heating terminal facing out of the housing and located inside the load wiring opening.

[0049] In one illustrative embodiment, the plurality of wiring openings include load wiring openings;

[0050] The electronic control board also includes an insulating shell and a switching device disposed within the insulating shell;

[0051] The top of the insulating shell blocks the load wiring opening, the electric auxiliary heating terminal is connected to the top of the insulating shell, and the switching device is electrically connected to the power line terminal and the electric auxiliary heating terminal to conduct and disconnect the circuit between the power line terminal and the electric auxiliary heating terminal.

[0052] In one illustrative embodiment, the low-voltage wiring terminal also includes a plurality of control board wiring terminals, which are located on the side or top of the housing;

[0053] At least three of the control board terminals are used to connect the wires of the temperature sensor, electronic expansion valve, and display board of the air conditioner indoor unit.

[0054] In one illustrative embodiment, the plurality of wiring openings include control panel wiring openings;

[0055] The control board wiring terminal is constructed as a plug interface, with one end of the control board wiring terminal facing out of the box and located inside the control board wiring opening.

[0056] In one illustrative embodiment, both the high-voltage and low-voltage terminals extend out of the housing through wiring openings.

[0057] In one illustrative embodiment, the electronic control board further includes a power supply board, on which the fan drive module is mounted;

[0058] The wind turbine drive module also includes an insulating component connected to the protective housing;

[0059] The insulating component is sandwiched between the heat sink and the power board.

[0060] 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;

[0061] 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.

[0062] In one illustrative embodiment, the box body is provided with a metal shielding layer covering the outer wall of the box body.

[0063] This application discloses an indoor air conditioning unit that includes an electrical control box as described above.

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

[0065] This application proposes a method for assembling an electrical control box, which includes:

[0066] Install the control board, fan drive module and fan terminal block onto the power board;

[0067] Install the power board into the base casing;

[0068] Apply adhesive to the gap between the power board and the bottom shell to form a first sealant layer between the power board and the bottom shell;

[0069] Apply adhesive to the surface of the power board facing away from the bottom shell of the electronic control board to form a second sealant layer on the surface of the power board facing away from the bottom shell;

[0070] Install the top cover onto the bottom shell;

[0071] Install the box onto the casing of the indoor unit of the air conditioner, and use grounding screws to fasten the power board to the casing of the indoor unit of the air conditioner so that the grounding terminal of the power board is electrically connected to the casing of the indoor unit of the air conditioner.

[0072] Connect the low-voltage and high-voltage terminals on the electrical control box.

[0073] In the technical solution of this application, the electrical control box houses the electrical control board, thus protecting it. During the installation, commissioning, and maintenance of the air conditioner, both the low-voltage and high-voltage wiring terminals of the electrical control box are exposed through wiring openings on the box. Workers can connect all the low-voltage and high-voltage wiring terminals without opening the box, greatly reducing the possibility of wiring errors and lowering the probability of damage to the electrical control board.

[0074] The high-voltage and low-voltage terminals are located on opposite sides of the box, achieving a separate layout between high-voltage and low-voltage terminals. This avoids electromagnetic interference generated when the high-voltage terminals are energized from the electrical signals transmitted by the low-voltage terminals, improving the stability of the electrical signals transmitted by the low-voltage terminals. At the same time, if a short circuit or leakage occurs in the high-voltage terminals, the separate layout between high-voltage and low-voltage terminals can also prevent current crosstalk to the low-voltage terminals.

[0075] 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

[0076] 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.

[0077] Figure 1 This is a perspective view of an electrical control box according to an embodiment of this application;

[0078] Figure 2 This is a perspective view of the electrical control box from another angle in an embodiment of this application;

[0079] Figure 3 This is a top view of an electrical control box according to an embodiment of this application;

[0080] 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;

[0081] Figure 5 This is a perspective view of the bottom shell in an embodiment of this application;

[0082] Figure 6 This is a perspective view of the top cover in an embodiment of this application;

[0083] Figure 7 This is a three-dimensional schematic diagram of the heat sink in the embodiments of this application;

[0084] Figure 8 This is a full cross-sectional schematic diagram of an electrical control box according to an embodiment of this application;

[0085] Figure 9 This is a three-dimensional schematic diagram of a rubber-blocking cylinder according to an embodiment of this application;

[0086] Figure 10 This is a schematic diagram of a power board according to an embodiment of this application;

[0087] Figure 11This is a schematic diagram of a main control board according to an embodiment of this application;

[0088] Figure 12 This is a perspective view of another type of electrical control box in the embodiments of this application;

[0089] Figure 13 This is a perspective view of another type of electrical control box in the embodiments of this application. Detailed Implementation

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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, a temperature sensor, 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] like Figures 1-3 As shown, the electrical control box 100 is the logic control unit of the air conditioner. The electrical control box 100 includes a box body 1, an electrical control board 2, low-voltage wiring terminals 3a, and high-voltage wiring terminals 3b. The box body 1 has a box-shaped structure. 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 box body 1 is provided with wiring openings 10, which are through holes. Multiple wiring openings 10 are provided, and the number of wiring openings 10 is unlimited. The electrical control board 2 is housed within the box body 1. The electrical control board 2 is provided with the control circuitry for the indoor unit of the air conditioner, used to control the operation of various actuators of the indoor unit.

[0101] Both low-voltage terminal 3a and high-voltage terminal 3b are mounted on the control board 2. They can be soldered to and electrically connected to the control board 2. These terminals are used to connect the control board 2 to other electrical components in the indoor unit of the air conditioner. The voltage transmitted by the low-voltage terminal 3a is less than or equal to 36V. The voltage transmitted by the high-voltage terminal 3b is greater than 36V. Both terminals are exposed through wiring openings 10. The high-voltage terminal 3b can be electrically connected to the power supply, fan, and electric heater via wires. The low-voltage terminal 3a can be electrically connected to the electronic expansion valve, display panel, wired controller, and temperature sensor via wires. Multiple terminals 3 are exposed through wiring openings 10 on the housing 1. The low-voltage and high-voltage terminals 3a can be exposed through multiple wiring openings 10 on the housing 1. The high-voltage terminal 3b and the low-voltage terminal 3a are located on opposite sides of the housing 1.

[0102] In the embodiments of this application, the housing 1 of the electrical control box 100 houses the electrical control board 2, serving to protect the electrical control board 2. During the installation, commissioning, and maintenance of the air conditioner, the low-voltage wiring terminals 3a and high-voltage wiring terminals 3b of the electrical control box 100 are exposed through the wiring openings 10 on the housing 1. Workers can connect all the low-voltage wiring terminals 3a and high-voltage wiring terminals 3b without opening the housing 1 of the electrical control box 100. This operation method greatly reduces the possibility of wiring errors and lowers the probability of damage to the electrical control board 2.

[0103] The high-voltage terminal 3b and the low-voltage terminal 3a are located on opposite sides of the housing 1, which realizes the partitioned layout between high-voltage and low-voltage terminals. This can prevent the electromagnetic field generated when the high-voltage terminal 3b is energized from interfering with the electrical signal transmitted by the low-voltage terminal 3a, thereby improving the stability of the electrical signal transmitted by the low-voltage terminal 3a. At the same time, if the high-voltage terminal 3b experiences a short circuit or leakage, the partitioned layout between high-voltage and low-voltage terminals can also prevent current crosstalk to the low-voltage terminal 3a.

[0104] In one illustrative embodiment, such as Figure 3 , 4 As shown, the high-voltage terminal 3b includes a power cord terminal 31. 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 the conductor 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. Multiple wiring openings 10 include 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.

[0105] The low-voltage wiring terminal 3a includes a communication line terminal 32. 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. Multiple wiring openings 10 include 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.

[0106] In this way, both the power cord terminal 31 and the communication line terminal 32 are located on the side of the housing 1 and exposed from the side. This allows the power cord and communication line to be connected to the power cord terminal 31 and communication line terminal 32 of the control box 100 respectively without opening the housing 1. Furthermore, during wiring, the power cord terminal 31 and communication line terminal 32 can be quickly identified, preventing the high-voltage power cord from being incorrectly connected to the low-voltage communication line, thus avoiding damage to the control board 2. In particular, the fact that both the power cord terminal 31 and communication line terminal 32 are located on the side of the housing 1 makes wiring even easier.

[0107] 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, and are located at opposite ends of that side. The power line terminal 31 and the communication line terminal 32 can be configured 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.

[0108] The power cord terminal 31 and the communication cord terminal 32 are located on the same side of the housing 1, so that 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.

[0109] In some embodiments, the power line terminal 31 and the communication line terminal 32 are located on opposite sides of the housing 1, respectively.

[0110] The power cord terminal 31 and the communication cord terminal 32 are located on opposite sides of the housing 1. The communication cord and the power cord can be routed from opposite sides of the housing 1, which facilitates the management and connection of the communication cord and the power cord, and also avoids the magnetic field generated by the power cord from interfering with the electrical signals transmitted by the communication cord.

[0111] 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.

[0112] 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.

[0113] 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 enclosed by the top of the side plate 1112.

[0114] 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. At least a portion of the wiring openings 10 are provided on the top cover 12.

[0115] 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. The high-voltage wiring terminals 3b and low-voltage wiring terminals 3a are exposed through the wiring openings 10 on the top cover 12, which makes it easier to connect the wiring terminals 3.

[0116] 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 covers the top of the side plate 1112. 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.

[0117] The power connection opening 101 and the communication connection opening 102 are two notches on the top cover 12. The power connection opening 101 is a notch formed by the outer wall of the cover 121 on one side of the insulating protrusion 122 and the insulating protrusion 122. The communication connection opening 102 is a notch formed by the outer wall of the cover 121 on the other side of the insulating protrusion 122 and the insulating protrusion 122. 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.

[0118] 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.

[0119] 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.

[0120] In one illustrative embodiment, such as Figure 4 As shown, the communication line terminal 32 is provided with an insulating cover 24. 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 upper 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. The communication line terminal 32 is also provided with multiple metal wiring portions, each located within a different isolation chamber 241.

[0121] 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 metal terminal of the communication cable terminal 32. Adjacent metal terminals are separated, preventing short circuits between the metal terminals of the communication cable terminal 32 and thus avoiding damage to the control board 2. Simultaneously, with the insulating cover 24 covering the metal terminal of the communication cable terminal 32, workers can identify the communication cable terminal 32 by its appearance during wiring, reducing the likelihood of incorrect wiring.

[0122] In one illustrative embodiment, such as Figure 4As shown, an insulating frame 25 is provided on the power cord terminal 31. 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 connected to all the insulating plates 251.

[0123] The power cord terminal 31 is also provided with multiple metal connection parts, and a metal connection part of the power cord terminal 31 is provided between every two adjacent insulating plates 251.

[0124] The two adjacent metal terminals are separated by an insulating plate 251, which can prevent short circuits between the metal terminals of the power cord terminal 31 and damage to the control board 2. At the same time, the metal terminals of the power cord terminal 31 are located inside the insulating frame 25, so that the operator can identify the power cord terminal 31 by looking at the appearance of the insulating frame 25 when wiring, and the power cord terminal 31 is less likely to be connected incorrectly.

[0125] In one illustrative embodiment, such as Figure 2 , 5 As shown in Figure 6, 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.

[0126] like Figure 4 As shown, 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 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 second through hole 111.

[0127] 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. The diameter of the grounding screw shank is smaller than the diameter of the third through hole 210. 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 bottom shell 11 and the third through hole 210 on the electrical control board 210.

[0128] 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.

[0129] 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.

[0130] In one illustrative embodiment, such as Figure 2 , 4 As shown, the high-voltage terminal block 3b also includes 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 in 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 can 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.

[0131] In some embodiments, the plurality of wiring openings 10 include a fan wiring opening 105. The fan wiring opening 105 is located on the top of the cover 121 of the upper cover 12 or on the side of the cover 121. The fan wiring terminal 35 is exposed from the fan wiring opening 105.

[0132] 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.

[0133] In one illustrative embodiment, such as Figure 1 As 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.

[0134] The control board 2 includes a fan drive module 27. The fan drive module 27 is housed within the housing 1. The fan drive module 27 includes a fan drive board (not shown), 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 close it, and the other side of the radiator 271 also 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. 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 a fan terminal 35. The fan drive board can output drive current to the fan terminal 35 to drive the fan.

[0135] 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.

[0136] In one illustrative embodiment, the control board 2 also includes a power board 21, on which the fan drive module 27 is mounted.

[0137] like 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.

[0138] 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.

[0139] 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.

[0140] 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.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] 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. In this embodiment, the heat dissipation opening 13 is located on one side of the housing 1.

[0145] In one illustrative embodiment, the high-voltage terminal 3b further includes an auxiliary electric heating terminal 33. The auxiliary electric heating terminal 33 is soldered to 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. A plurality of wiring openings 10 include 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 housing 121.

[0146] 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.

[0147] In one illustrative embodiment, the control board 2 includes an insulating housing 261 and a switching device 215. The switching device 215 may be a relay. The switching device 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 device 215 is electrically connected to the power line terminal 31 and the auxiliary heating terminal 33. The switching device 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 indoor unit's electric heater.

[0148] 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.

[0149] In one illustrative embodiment, the wiring opening 10 on the housing 1 includes a control board wiring opening 104. The low-voltage wiring terminal 3a includes a plurality of control board wiring terminals 34. At least three control board 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.

[0150] The control board wiring opening 104 can be located on the top of the housing 1, with multiple control board terminals 34 also located on the top of the housing 1, and the multiple control board terminals 34 exposed outside the housing 1 through the control board wiring opening 104 located on the top of the housing 1. Alternatively, the control board wiring opening 104 can be located on the side of the housing 1, with multiple control board terminals 34 also located on the side of the housing 1, and the multiple control board terminals 34 exposed outside the housing 1 through the control board wiring opening 104 located on the side of the housing 1.

[0151] In this way, the control board 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 control board wiring terminal 34 of the control box 100 without opening the box 1 of the control box 100. At the same time, the control board wiring terminal 34 can be quickly identified during the wiring process, which can prevent incorrect wiring on the control board wiring terminal 34 from damaging the control board 2.

[0152] In one illustrative embodiment, the control board terminal 34 is configured as a plug-in interface. One end of the control board terminal 34 faces outward from the housing 1 and is located within the control board wiring opening 104.

[0153] In this way, the control board terminal 34 is constructed as a plug-in interface, and the wires of the temperature sensor, the electronic expansion valve, and the display board can be easily plugged into the corresponding control board terminal 34. At the same time, the end of the control board terminal 34 facing out of the box 1 is located inside the control board wiring opening 104 of the box 1, and the end of the control board terminal 34 facing out of the box 1 is basically flush with the box 1. This makes it easy for the staff to identify the control board terminal 34, and at the same time, the control board terminal 34 will not protrude from the box 1. The box 1 can protect the control board terminal 34 from damage.

[0154] In one illustrative embodiment, the control board 2 can be a single circuit board or a combination of multiple circuit boards.

[0155] In this embodiment, as Figure 4 As shown, the electrical control board 2 also includes a control board 22 and a fan wiring board 23.

[0156] The power board 21 is constructed as a flat plate, which may be a rectangular flat plate. The power board 21 may be a printed circuit board. The power board 21 is laid flat inside the bottom shell 11. The power board 21 is provided with a first mating hole 211, a second mating hole 212, and a third mating hole 213. The first mating hole 211, the second mating hole 212, and the third mating hole 213 are all constructed as through holes, and the shape of the through holes is not limited; the through holes may be circular, rectangular, or strip-shaped. The first mating hole 211 and the second mating hole 212 are respectively located near two adjacent sides of the power board 21. The first mating hole 211 and the second mating hole 212 may also be located near two opposite sides of the power board 21. In some embodiments, the first mating hole 211 and the second mating hole 212 are strip-shaped through holes, extending along two adjacent sides of the power board 21. The third mating hole 213 is located near the second mating hole 212.

[0157] Power line terminal 31, communication line terminal 32, insulating shell 261, and switching device 215 are all disposed on the side of power board 21 facing away from bottom shell 11. Power line terminal 31 and communication line terminal 32 may be disposed on the same end of power board 21. Third through hole 210 is disposed on power board 21 and penetrates power board 21 vertically.

[0158] The control board 22 is constructed as a flat plate, which may be a rectangular flat plate. The control board 22 may be a printed circuit board. The control board 22 is disposed 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 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.

[0159] Multiple control board terminals 34 are located on one end of the control board 22 facing away from the first connecting pin 221. The multiple control board terminals 34 are arranged sequentially at intervals along the edge of the control board 22.

[0160] The fan drive board of the fan drive module 27 is a flat plate, which can be a rectangular plate. The fan drive board can be a printed circuit board. The fan drive board 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 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 board 21 and soldered to the power board 21. An electrical connection is formed between the fan drive board and the power board 21.

[0161] 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. The fan terminal 35 is located on the end of the fan terminal block 23 facing away from the third connecting pin.

[0162] In this way, the electronic control board 2 is composed of multiple circuit boards such as the power supply board 21, the control board 22, the fan drive module 27, and the fan wiring board 23. The control board 22, the fan drive module 27, and the fan wiring board 23 are all located on the same side of the power supply board 21. This 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.

[0163] In one illustrative embodiment, such as Figure 10 , 11 As 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 includes a main control circuit 222, a communication circuit 225, a temperature sampling circuit 223, and a valve drive circuit 224. The main control circuit 222 is a microcomputer or a single-chip microcomputer.

[0164] 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 switching device 215 and filter rectifier circuit 216. Switching device 215 is connected to electric heater via electric auxiliary heating terminal 33. Switching device 215 is electrically connected to main control circuit 222, and main control circuit 222 can switch the electric heater on and off via switching device 215.

[0165] Power line terminal 31 is electrically connected to filter and rectifier circuit 216. Filter and rectifier circuit 216 is electrically connected to power circuit 214 on power board 21 and fan drive circuit on fan drive board. Filter and rectifier circuit 216 filters and rectifies the current input from power line terminal 31 before sending it to fan drive circuit on fan drive board and power circuit 214 on power board 21. Fan drive circuit is electrically connected to main control circuit 222. Fan drive circuit is controlled by main control circuit 222 and converts the current output from filter and rectifier circuit 216 into fan drive current. This drive current is then sent to the fan through fan terminal 35 to drive the fan.

[0166] 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. The power supply circuit 214 can convert the current output from the filter rectifier circuit 216 into low-voltage DC power to power the main control circuit 222. This DC power can be 5V, 8V, or 12V.

[0167] The communication circuit 225, temperature sampling circuit 223, and valve drive circuit 224 are all electrically connected to the main control circuit 222. The communication circuit 225 is used to realize data transmission and communication between the control board 2 and external devices. The communication circuit 225 is connected to the outdoor unit of the air conditioner or the wired controller through the communication line terminal 32.

[0168] The temperature sampling circuit 223 is connected to the temperature sensor via a control board terminal 34. The temperature sampling circuit 223 is used to convert the temperature signal collected by the temperature sensor into an electrical signal and transmit the electrical signal to the main control circuit 222.

[0169] The valve drive circuit 224 is connected to the electronic expansion valve via a control board terminal 34. The valve drive circuit 224 can be a motor drive circuit. The valve drive circuit 224 is used to output drive current to the electronic expansion valve to adjust its opening degree.

[0170] 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.

[0171] 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 bottom end of the isolation ring 112 surrounds the second through hole 111 on the bottom shell 11. The top end of the isolation ring 112 abuts against the surface of the power board 21.

[0172] 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.

[0173] 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, that is, it covers the surface of the power board 21 facing away from the first sealant layer 41. 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, that is, it completely covers the surface of the power board 21 facing away from the first sealant layer 41. The thickness of the second sealant layer 42 is greater than or equal to the distance between the main body of the electronic components on the surface of the power board 21 facing the control board 22 and the power board 21. The second sealant layer 42 completely covers the pins of all electronic components on the surface of the power board 21 facing away from the first sealant layer 41. The second sealant layer 42 encapsulates all the pins of the electronic components on the surface of the power board 21.

[0174] 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.

[0175] In one illustrative embodiment, such as Figure 4 , 9 As shown, the electrical control box 100 also includes a sealant-blocking cylinder 5. The sealant-blocking cylinder 5 is disposed on the surface of the power board 21 facing away from the bottom shell 11. The sealant-blocking 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 power board 21. The cylindrical body 51 surrounds the third through hole 210 of the power board 21. The height of the cylindrical body 51 is greater than the thickness of the second sealant layer 42.

[0176] 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.

[0177] In one illustrative embodiment, such as Figure 6 As shown, a guide tube 124 is also provided on 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 third through hole 210 on the power board 21.

[0178] In this way, when installing the grounding screw, the grounding screw is inserted into the guide tube 124 through the first through hole 123, and the grounding screw can slide into the third through hole 210 along the guide tube 124, making the installation of the grounding screw more convenient.

[0179] In another illustrative embodiment, such as Figure 12 , 13 As shown, the control board 2 includes an insulating housing 261 and a switching device 215. The switching device 215 can be a relay. The switching device 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 device 215 is electrically connected to the power line terminal 31 and the electric auxiliary heating terminal 33. The switching device 215 is used to connect and disconnect the circuit between the power line terminal 31 and the electric auxiliary heating terminal 33, thereby controlling the electric heater of the indoor unit.

[0180] 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.

[0181] In another illustrative embodiment, such as Figure 12 , 13 As shown, both the high-voltage terminal 3b and the low-voltage terminal 3a extend out of the housing 1 through the wiring opening 10a. In this embodiment, the low-voltage terminal 3a includes a control board terminal 34 and a communication line terminal 32, and the high-voltage terminal 3b includes an electric auxiliary heating terminal 33, a power line terminal 31, and a fan terminal 35. The electric auxiliary heating terminal 33 extends out of the housing 1 through the load wiring opening 103a, the control board terminal 34 extends out of the housing 1 through the control board wiring opening 104a, the power line terminal 31 extends out of the housing 1 through the power wiring opening 101a, the communication line terminal 32 extends out of the housing 1 through the communication wiring opening 102a, and the fan terminal 35 extends out of the housing 1 through the fan wiring opening 105a.

[0182] Since all high-voltage terminals 3b and low-voltage terminals 3a extend out of the housing 1 through the wiring opening 10a, the high-voltage terminals 3b and low-voltage terminals 3a occupy little internal space in the housing 1, which can reduce the volume occupied by the housing 1, increase the airflow area of ​​the air duct of the indoor unit of the air conditioner, reduce the air resistance in the air duct, and thus increase the air volume of the indoor unit of the air conditioner.

[0183] In one illustrative embodiment, a metal shielding layer is further provided on the housing 1. The metal shielding layer is a film 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.

[0184] 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.

[0185] This embodiment also proposes an assembly method for an electrical control box. This assembly method is based on the aforementioned electrical control box and includes the following steps:

[0186] S1: Install the control board 22, the fan drive module 27 and the fan terminal block 23 onto the power board 21 to complete the assembly of the electronic control board;

[0187] S2: Install the power board 21 of the electronic control board 2 into the base shell 11;

[0188] S3: Apply adhesive to the gap between the power board 21 of the control board 2 and the bottom plate 1111 of the bottom shell 11 to form a first sealant layer 41 between the power board 21 and the bottom shell 11.

[0189] S4: Apply adhesive to the surface of the power board 21 of the electronic control board 2 facing away from the bottom shell to form a second sealant layer 42 on the surface of the power board 21 facing away from the bottom shell 11.

[0190] S5: Install the upper cover 12 onto the bottom shell 11 so that the upper cover 12 and the bottom shell 11 form a box 1 for accommodating the electronic control board 2;

[0191] S6: Install the box 1 onto the casing of the indoor unit of the air conditioner, and use grounding screws to fasten the power board 21 to the casing of the indoor unit of the air conditioner so that the grounding terminal of the power board 21 is electrically connected to the casing of the indoor unit of the air conditioner.

[0192] S7: Connect the low-voltage terminal 3a and high-voltage terminal 3b on the electrical control box 100.

[0193] Using this assembly method to assemble the control box 100 can quickly achieve the assembly of the control box 100, avoid the operation of incorrect wiring. At the same time, the first sealant layer 41 and the second sealant layer 42 can isolate the power board 21 from the air, play a role in waterproofing and dustproofing, and improve the reliability of the power board 21.

[0194] 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.

[0195] 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.

[0196] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0197] 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.

[0198] 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.

[0199] 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.

[0200] 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: The box body (1) is provided with multiple wiring openings (10); The control board (2) is housed in the housing (1); The low-voltage terminal (3a) transmits a voltage less than or equal to 36V and is connected to the electrical control board (2); A high-voltage terminal (3b) is connected to the electrical control board (2) and transmits a voltage greater than 36V. The low-voltage terminal (3a) and the high-voltage terminal (3b) are exposed through multiple wiring openings (10), and the high-voltage terminal (3b) and the low-voltage terminal (3a) are located on opposite sides of the housing (1).

2. The electrical control box according to claim 1, characterized in that, The high-voltage terminal (3b) includes a power cord terminal (31), which is used to connect the power cord of the indoor unit of the air conditioner; The low-voltage wiring terminal (3a) includes a communication line terminal (32), which is used to connect the communication line of the indoor unit of the air conditioner; The power line terminal (31) and the communication line terminal (32) are both located on the side of the housing (1).

3. The electric control box according to claim 2, wherein The power line terminal (31) and the communication line terminal (32) are respectively located at opposite ends of the same side of the housing (1); or, The power line terminal (31) and the communication line terminal (32) are located on opposite sides of the housing (1).

4. The electric control box according to claim 2, 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 at least part of the wiring opening (10) is provided on the top cover (12).

5. The electric control box according to claim 4, wherein The bottom shell (11) includes a cylindrical side plate (1112) and a bottom plate (1111) covering the bottom end of the side plate (1112), and the opening of the bottom shell (11) is located at the top of the side plate (1112). The upper cover (12) includes: The casing (121) arches away from the bottom shell (11) and covers the top of the side plate (1112); and, An insulating protrusion (122) is provided on the outer side wall of the housing (121); The plurality of wiring openings (10) include a power wiring opening (101) and a communication wiring opening (102). The power wiring opening (101) is a notch formed by the outer side wall of the cover (121) on one side of the insulating protrusion (122) and the insulating protrusion (122). The communication wiring opening (102) is a notch formed by the outer side wall of the cover (121) on the other side of the insulating protrusion (122) and the insulating protrusion (122). The power line terminal (31) and the communication line terminal (32) extend out of the housing (1) through the power wiring opening (101) and the communication wiring opening (102), respectively.

6. The electric control box according to claim 4, wherein 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).

7. The electric control box according to claim 6, wherein It also includes grounding screws; 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).

8. The electrically controlled box according to claim 6, wherein, The electronic control board (2) includes a power board (21) disposed inside the bottom shell (11); The electrical control box (100) also includes a first sealant layer (41) disposed in the bottom shell (11), the first sealant layer (41) filling the gap between the bottom shell (11) and the power board (21); An isolation ring (112) is also provided on the side of the bottom shell (11) near the power board (21). The bottom end of the isolation ring (112) surrounds the second through hole (111), and the top end of the isolation ring (112) abuts against the power board (21).

9. The electric control box according to claim 8, wherein It also includes a second sealant layer (42), which covers the surface of the power board (21) facing away from the first sealant layer (41); The second sealant layer (42) completely covers the pins of all electronic components on the power board (21) facing away from the first sealant layer (41).

10. The electrical control box according to any one of claims 1 to 8, characterized in that, The high-voltage wiring terminal (3b) includes a fan wiring terminal (35); The fan terminal (35) is used to connect the wires of the fan of the indoor unit of the air conditioner; The fan terminal (35) is located on the side or top of the housing (1).

11. The control box of claim 10, wherein, The box body (1) is also provided with heat dissipation openings (13); The electrical control board (2) includes a fan drive module (27) disposed within the housing (1), the fan drive module (27) comprising: The fan drive board is provided with a fan drive circuit electrically connected to the fan terminal (35); and, The radiator (271) abuts against the fan drive plate and covers the heat dissipation opening (13).

12. The control box of claim 11, wherein, The fan drive module (27) also includes a protective shell (272) for accommodating the fan drive board; An opening is provided on one side of the protective shell (272), and a heat sink (271) covers the opening of the protective shell (272).

13. The control box of claim 12, wherein, The heat dissipation opening (13) is provided on the side, top or bottom of the box body (1).

14. The electric control box according to any one of claims 2 to 8, characterized by, The high-voltage terminal block (3b) also includes an electric auxiliary heating terminal block (33); The electric auxiliary heating terminal (33) is used to connect the wire of the electric heater of the indoor unit of the air conditioner; The electric auxiliary heating terminal (33) is located on the side or top of the housing (1).

15. The electric control box according to claim 14, wherein, The plurality of said wiring openings (10) include a load wiring opening (103); The electric auxiliary heating terminal (33) is configured as a plug-in interface, with one end of the electric auxiliary heating terminal (33) facing outward from the housing (1) and located inside the load wiring opening (103).

16. The electrically controlled box according to claim 14, wherein, The plurality of said wiring openings (10) include a load wiring opening (103); The control board (2) also includes an insulating shell (261) and a switching device (215) disposed within the insulating shell (261); The top of the insulating shell (261) blocks the load wiring opening (103), the electric auxiliary heating terminal (33) is connected to the top of the insulating shell (261), and the switching device (215) is electrically connected to the power line terminal (31) and the electric auxiliary heating terminal (33) to conduct and disconnect the circuit between the power line terminal (31) and the electric auxiliary heating terminal (33).

17. The electric control box according to any one of claims 1 to 8, characterized by, The low-voltage wiring terminal (3a) also includes a plurality of control board wiring terminals (34), which are located on the side or top of the housing (1); At least three of the control board terminals (34) are used to connect wires to the temperature sensor, electronic expansion valve and display board of the air conditioner indoor unit.

18. The electrical control box according to claim 17, characterized in that, The plurality of said wiring openings (10) include a control panel wiring opening (104); The control board wiring terminal (34) is configured as a plug interface, with one end of the control board wiring terminal (34) facing out of the housing (1) and located inside the control board wiring opening (104).

19. The electrically controlled box of claim 1, wherein, Both the high-voltage terminal (3b) and the low-voltage terminal (3a) extend out of the housing (1) through the wiring opening (10).

20. The electrically controlled box of claim 12, wherein, The electronic control board (2) also includes a power supply board (21), and the fan drive module (27) is mounted on the power supply board (21); The fan drive module (27) also includes 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).

21. The electrically controlled box according to claim 20, 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.

22. The electric control box according to any one of claims 1 to 9, characterized by, The box (1) is provided with a metal shielding layer that covers the outer wall of the box (1).

23. An air conditioner indoor unit characterized by comprising: Includes the electrical control box (100) as described in any one of claims 1 to 22.

24. An air conditioner characterized by comprising: Including the air conditioning indoor unit as described in claim 23.

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