Air conditioner, air conditioner indoor unit, electric control box and fan driving module

Abstract

The invention relates to the technical field of air conditioning, and provides an air conditioner, an air conditioner indoor unit, an electric control box and a fan driving module, and the electric control box comprises a fan driving plate used for driving a fan to operate; the radiator is propped against the fan driving plate; and a cavity for accommodating the fan driving plate is defined by the insulating shell and the radiator. The fan driving module can prevent a human body from electric shock, the safety is improved, meanwhile, the cavity can prevent external dust and water from entering the cavity, dust accumulation or damp on the fan driving plate is avoided, and the service life of the fan driving plate is prolonged. Particularly, the radiator abuts against the fan driving board, the radiator can radiate heat generated when the fan driving board operates out of the cavity, and the situation that due to the fact that the fan driving board is overheated, electronic devices on the fan driving board work unstably is avoided.

Description

Technical Field

[0001] This document relates to the technical field of air conditioning, and particularly to an air conditioner, an indoor unit of an air conditioner, an electric control box, and a fan drive module. Background Art

[0002] In existing air conditioners, a fan drive circuit is used to drive the fan to operate. As a core electric control component, the stability and safety of the fan drive circuit directly affect the operating performance of the air conditioner. However, in the prior art, the fan drive circuit is generally arranged in the electric control box in an exposed or semi-exposed manner, and this way has significant potential safety hazards and reliability problems.

[0003] From the perspective of after-sales maintenance scenarios, when maintenance personnel conduct fault troubleshooting or component replacement on the air conditioner, they need to frequently contact the fan drive circuit in the electric control box. Due to the lack of an effective protection structure for the module components, it is very likely that the operator's hand will accidentally touch the live interface, exposed circuit, or high-voltage component of the fan drive circuit, resulting in an electric shock risk and seriously threatening the personal safety of the maintenance personnel. At the same time, dust accumulation on the components of the fan drive circuit may also cause the fan drive circuit to fail.

[0004] In the transportation link, when the air conditioner encounters bumps, collisions, or drops during transportation, the exposed fan module lacks buffer protection and fixed support, and is easily in hard collision with the inner wall of the electric control box or other components, resulting in damage to the fan drive circuit. This not only increases the after-sales maintenance cost of the product, but also has a negative impact on the overall reliability and service life of the air conditioner. Summary of the Invention

[0005] The present application provides a fan drive module for an air conditioner, which is characterized by including: A fan drive board for driving the fan to operate; A radiator in contact with the fan drive board; and, An insulating shell that encloses with the radiator to form a cavity for accommodating the fan drive board.

[0006] In a schematic embodiment, the insulating shell includes a protective shell and an insulating member; The insulating member is arranged at the bottom end of the radiator; The protective shell is provided with an inner cavity for accommodating the fan drive board and a first opening arranged on one side of the inner cavity, and the radiator and the insulating member jointly cover the first opening of the protective shell.

[0007] In a schematic embodiment, a plurality of profiling openings are arranged on the insulating member; The fan driving plate comprises a base plate, on which a plurality of first connecting pins are arranged, and the plurality of first connecting pins extend out of the cavity through a plurality of contoured openings respectively.

[0008] In an illustrative embodiment, the contoured opening is configured as a groove formed by a recessed side surface where the insulating member abuts against the protective shell.

[0009] In an illustrative embodiment, the heat sink includes a heat dissipation plate covering the first opening and a plurality of first fins; The plurality of first fins are arranged on a plate surface of the heat dissipation plate facing away from the protective shell.

[0010] In an exemplary embodiment, the insulating member includes a main body portion covering the first opening and a plurality of second fins arranged on a side of the main body portion facing away from the protective shell; Wherein, the arrangement of the plurality of first fins and the plurality of second fins are the same.

[0011] In an exemplary embodiment, the heat sink further comprises a support connected to the first fin or the heat sink; The insulating member is provided with a clearance opening, and the support pillar is passed through the clearance opening.

[0012] In an exemplary embodiment, the support is arranged to be connected to the first fin; The clearance opening is a groove formed by the side of the second fin facing away from the main body.

[0013] In an illustrative embodiment, the heat sink further comprises a boss disposed on a side of the heat sink facing the fan driving plate; The fan drive board also includes a fan drive circuit, and the fan drive circuit includes a power semiconductor module arranged on the substrate; The power semiconductor module abuts against the boss.

[0014] In an illustrative embodiment, the boss extends from one side of the substrate to the other side of the substrate; A positioning groove is also provided at one end of the side wall of the protective shell close to the base plate, and the boss extends into the positioning groove.

[0015] In an exemplary embodiment, the protective shell includes a cylindrical first side plate, a back plate covering one end of the first side plate, and a plurality of support platforms arranged on a side of the back plate close to the first side plate, and the back plate and the first side plate enclose the inner cavity; Wherein, the support platform abuts against the substrate.

[0016] In a schematic embodiment, screw holes are provided on the radiator, first through holes coaxial with the screw holes are provided on the substrate, and second through holes coaxial with the screw holes are provided on the support platform; The fan driving module further includes screws that sequentially pass through the second through hole, the first through hole and are screwed into the screw holes.

[0017] The present application also provides an electric control box for an air conditioner indoor unit, which includes the fan driving module and a box body as described above; A heat dissipation opening is provided on the box body, the fan driving module is arranged inside the box body and the radiator covers the heat dissipation opening.

[0018] In a schematic embodiment, a power supply board and a control board arranged inside the box body are further included; Both the fan driving module and the control board are connected to the power supply board and are located on the same side of the power supply board. The power supply board is configured to convert industrial frequency alternating current into direct current to supply power to the control board and the fan driving board. The control board is the logic control unit of the air conditioner indoor unit.

[0019] In a schematic embodiment, the power supply board is arranged at the bottom of the box body, and both the control board and the fan driving board are arranged on one side of the power supply board close to the top of the box body; The control board is fixedly connected to the power supply board and is perpendicular to the power supply board, and the fan driving board is fixedly connected to the power supply board and is perpendicular to the power supply board.

[0020] The present application also provides an air conditioner indoor unit, which includes the electric control box as described above.

[0021] The present application also provides an air conditioner, which includes the air conditioner indoor unit as described above.

[0022] In the technical solution of the present application, the insulating shell and the radiator enclose a sealed cavity, which houses the fan driving board. This can not only prevent people from directly contacting the fan driving board, avoid electric shock to people, and improve safety. At the same time, this cavity can also prevent external dust and water from entering the cavity, avoid dust accumulation or moisture absorption on the fan driving board, and improve the service life of the fan driving board. In particular, the radiator abuts against the fan driving board, and the radiator can dissipate the heat generated when the fan driving board operates to the outside of the cavity, avoiding overheating of the fan driving board and resulting in unstable operation of the electronic devices on the fan driving board.

[0023] Other features and advantages of the present application will be described in the subsequent specification, and part of them will become obvious from the specification, or be understood by implementing the present application. Other advantages of the present application can be realized and obtained through the solutions described in the specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings are used to provide an understanding of the technical solutions of the present application and form a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solutions of the present application and do not constitute a limitation to the technical solutions of the present application.

[0025] Figure 1 It is a three-dimensional schematic diagram of an electric control box in an embodiment of the present application; Figure 2 It is a three-dimensional schematic diagram of the electric control box from another perspective in an embodiment of the present application; Figure 3 It is a top view schematic diagram of an electric control box in an embodiment of the present application; Figure 4 It is a three-dimensional schematic diagram of the electric control box after removing the upper cover in an embodiment of the present application; Figure 5 It is a three-dimensional schematic diagram of a fan drive module in an embodiment of the present application; Figure 6 It is a disassembly schematic diagram of a fan drive module in an embodiment of the present application; Figure 7 It is a three-dimensional schematic diagram of a fan drive board in an embodiment of the present application; Figure 8 It is a three-dimensional schematic diagram of an insulating part in an embodiment of the present application; Figure 9 It is a three-dimensional schematic diagram of a radiator in an embodiment of the present application; Figure 10 It is a three-dimensional schematic diagram of a protective case in an embodiment of the present application; Figure 11 It is a three-dimensional schematic diagram of a bottom case in an embodiment of the present application; Figure 12 It is a three-dimensional schematic diagram of an upper cover in an embodiment of the present application; Figure 13 It is a three-dimensional schematic diagram of a radiator in an embodiment of the present application; Figure 14 It is a full cross-sectional schematic diagram of an electric control box in an embodiment of the present application; Figure 15 It is a three-dimensional schematic diagram of a rubber blocking cylinder in an embodiment of the present application; Figure 16 It is a schematic diagram of a power supply board in an embodiment of the present application; Figure 17 It is a schematic diagram of a main control board in an embodiment of the present application; Figure 18 It is a three-dimensional schematic diagram of another electric control box in an embodiment of the present application; Figure 19 It is a three-dimensional schematic diagram of another electric control box in an embodiment of the present application.

[0026] Reference numerals: 100, electric control box; 1, box body; 11, bottom shell; 111, second mounting through hole; 1111, bottom plate; 1112, second side plate; 12, upper cover; 121, cover shell; 122, insulating projection; 123, first mounting through hole; 124, guiding cylinder; 10, wiring opening; 101, power supply wiring opening; 102, communication wiring opening; 103, load wiring opening; 104, weak current wiring opening; 13, heat dissipation opening; 2, electric control board; 21, power supply board; 210, third mounting through hole; 211, second docking hole; 212, first docking hole; 213, third docking hole; 214, power supply circuit; 215, switch circuit; 216, filter rectification circuit; 22, control board; 221, second connection pin; 222, main control circuit; 223, sensor circuit; 224, valve drive circuit; 225, communication circuit; 23, fan wiring board; 24, insulating cover; 241, isolation chamber; 25, insulating bracket; 251, insulating plate; 252, connecting plate; 261, insulating housing; 27, fan drive module; 270, insulating shell; 271, radiator; 2711, heat dissipation plate; 2712, first fin; 2713, support pillar; 2714, boss; 272, protective shell; 2720, inner cavity; 2721, first opening; 2722, first side plate; 2723, support table; 2724, second through hole; 2725, positioning groove; 2726, first buckle; 2727, back plate; 2721, first opening; 273, insulating part; 2731, main body part; 2732, second fin; 2733, profiling opening; 2734, relief opening; 274, fan drive board; 2741, substrate; 2742, fan drive circuit; 27441, first straight section; 27442, second straight section; 2744, first connection pin; 2745, first through hole; 3, wiring terminal; 31, power supply wire terminal; 32, communication wire terminal; 33, electric auxiliary heating wiring terminal; 34, weak current wiring terminal; 35, fan wiring terminal; 41, first sealant layer; 42, second sealant layer; 5, glue blocking cylinder; 51, cylinder body; 52, connecting column; 101a, power supply wiring opening; 102a, communication wiring opening; 103a, load wiring opening; 104a, weak current wiring opening; 105a, fan wiring opening. Detailed implementation manners

[0027] This application describes multiple embodiments, but the description is exemplary rather than restrictive, and it will be apparent to those of ordinary skill in the art that there can be more embodiments and implementation solutions within the scope encompassed by the embodiments described in this application. 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 restricted, any feature or element of any embodiment can be used in combination with any other feature or element in any other embodiment, or can replace any other feature or element in any other embodiment.

[0028] This application includes and contemplates combinations with features and elements known to those of ordinary skill 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 alone or in any suitable combination. Therefore, the embodiments are not subject to other limitations except those made in accordance with the appended claims and their equivalents. In addition, various modifications and changes can be made within the scope of the appended claims.

[0029] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not depend on the specific order of the steps described herein, the method or process should not be limited to the specific order of steps described. As will be understood by those of ordinary skill in the art, other step orders are possible. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation on the claims. In addition, the claims directed to the method and / or process should not be limited to performing their steps in the order written, and those skilled in the art can readily understand that these orders can vary and still remain within the spirit and scope of the embodiments of this application.

[0030] An embodiment of this application also proposes an air conditioner. The air conditioner is a split air conditioner. The air conditioner includes an indoor unit of the air conditioner. The indoor unit of the air conditioner is arranged in an indoor space. One or more indoor units of the air conditioner can be arranged.

[0031] The air conditioner indoor unit includes an electronic control box 100, an indoor heat exchanger, an electronic expansion valve, a display panel, a remote controller, sensors, a fan, an electric heater, and a housing. A duct is provided inside the housing, and an air inlet located at one end of the duct and an air outlet located at the other end of the duct are also provided on the housing. The fan and the indoor heat exchanger are both arranged in the duct. The fan is used to drive the air in the duct to flow from the air inlet to the air outlet, so that the air flows through the indoor heat exchanger and exchanges heat with the indoor heat exchanger, thereby realizing heating and cooling of the air.

[0032] The electronic expansion valve is arranged inside the housing. The electronic expansion valve is connected to the indoor heat exchanger. The electronic expansion valve is used to precisely control the flow rate and pressure of the refrigerant in the refrigerant circulation circuit, and plays the roles of throttling and reducing pressure, dynamically adjusting the refrigerant flow rate, improving energy efficiency, and enhancing system stability.

[0033] The display panel is arranged at the front end of the housing. The display panel is used to display the working status information of the air conditioner. For example, the display panel can display information such as the set temperature of the air conditioner, the working mode of the air conditioner, the indoor temperature, and the fault code.

[0034] The remote controller is the control panel of the air conditioner. The remote controller can be installed on the indoor wall. The remote controller is used to set the working mode of the air conditioner, set the set temperature of the air conditioner, and turn the air conditioner on and off.

[0035] The sensors include a temperature sensor and a humidity sensor. The temperature sensor can be arranged on the housing or on the display panel. The temperature sensor is used to measure the indoor ambient temperature. The humidity sensor can be arranged on the housing. The humidity sensor is used to measure the indoor ambient humidity.

[0036] The electric heater is arranged in the duct. The electric heater is used to assist in heating the air flowing through the duct.

[0037] As Figures 1 to 4 shown, the electronic control box 100 includes a box body 1 and an electronic control board 2 arranged inside the box body 1. The electronic control board 2 includes a fan drive module 27 and a power supply board 21. The fan drive module 27 is installed on the power supply board 21.

[0038] As Figure 5 、 6 shown, Figure 5 、 6 shows a fan drive module 27 of an air conditioner in the present application. The fan drive module 27 includes a fan drive board 274, a radiator 271, and an insulating housing 270.

[0039] As Figure 7As shown, the fan drive board 274 includes a substrate 2741 and a fan drive circuit 2742. The fan drive circuit 2742 is disposed on the substrate 2741. The substrate 2741 may be a printed circuit board. The fan drive circuit 2742 of the fan drive board 274 is electrically connected to the power supply board 21, and the power supply board 21 is configured to convert industrial frequency alternating current into direct current to supply power to the fan drive circuit 2742 of the fan drive board 274. The fan drive circuit 2742 is used to drive the fan to operate. The fan may be a DC fan, and the fan drive circuit 2742 may be a square wave drive circuit, a sine wave drive circuit, or a brushless DC motor (BLDC) drive circuit.

[0040] As Figure 6 , 9 shown, the radiator 271 is made of a material with high thermal conductivity. The radiator 271 may be made of metal, such as aluminum or an alloy of aluminum. The radiator 271 abuts against the fan drive board 274. The radiator 271 may be a fin radiator.

[0041] As Figure 5 shown, the insulating shell 270 is made of an insulating material and has insulating properties. The insulating material may be plastic. The insulating shell 270 may be configured as a thin shell structure. The insulating shell 270 and the radiator 271 enclose a cavity that houses the fan drive board 274.

[0042] In this way, the insulating shell 270 and the radiator 271 enclose a sealed cavity that houses the fan drive board 274. This can prevent direct human contact with the fan drive board 274, avoid electric shock to humans, and improve safety. At the same time, this cavity can also prevent external dust and water from entering the cavity, avoid dust accumulation or moisture on the fan drive board 274, and extend the service life of the fan drive board 274. In particular, the radiator 271 abuts against the fan drive board 274, and the radiator 271 can dissipate the heat generated when the fan drive board 274 operates to the outside of the cavity, preventing the fan drive board 274 from overheating and causing unstable operation of the electronic components on the fan drive board 274.

[0043] In a schematic embodiment, as Figure 5 , 6 , 8 shown, the insulating shell 270 includes a protective shell 272 and an insulating member 273. Both the protective shell 272 and the insulating member 273 are made of insulating materials. The protective shell 272 is a thin shell structure. An inner cavity 2720 is provided inside the protective shell 272, and a first opening 2721 is also provided on the protective shell 272. The first opening 2721 may be a rectangular opening. The first opening 2721 is provided on one side of the inner cavity 2720 and communicates with the inner cavity 2720.

[0044] The insulating member 273 can be set to a straight bar shape. The insulating member 273 is disposed at the bottom end of the radiator 271 and extends along the bottom end of the radiator 271. The insulating member 273 and the radiator 271 jointly cover the first opening 2721 of the protective case 272. The insulating member 273 and the radiator 271 close the first opening 2721 of the protective case 272. The insulating member 273 is also connected to the protective case 272. A snap connection can be provided between the insulating member 273 and the protective case 272. For example, male snaps are provided at both opposite ends of the insulating member 273, and two female snaps are respectively provided on the opposite side walls of the protective case 272, and the two male snaps are respectively inserted into the two female snaps.

[0045] The insulating member 273 is disposed at the bottom end of the radiator 271. The insulating member 273 can separate the radiator 271 of the fan driving module 27 from the power supply board 21, which is usually a circuit board. After separating the radiator 271 from the power supply board 21, it can avoid large-area contact between the radiator 271 and the power supply board 21 of the fan driving module 27, resulting in electric leakage and short circuit, and at the same time increase the creepage distance between the radiator 271 and the power supply board 21.

[0046] In a schematic embodiment, as shown in FIGS. 6 and 7, a first connection pin 2744 is further provided on the substrate 2741. A plurality of first connection pins 2744 can be provided. The substrate 2741 can be configured as a flat plate, such as a rectangular flat plate. A plurality of first connection pins 2744 are all located at one end of the substrate 2741 close to the insulating member 273. One ends of the plurality of first connection pins 2744 are all connected to the substrate 2741, and the other ends of the first connection pins 2744 extend towards the insulating member 273. The first connection pin 2744 is a rod-shaped structure made of a metal material, and a welding connection can be provided between the first connection pin 2744 and the substrate 2741. The first connection pin 2744 is a pin of the fan driving board 274 and is used for transmitting electrical signals or power.

[0047] A plurality of profiling openings 2733 are provided on the insulating member 273. The number of profiling openings 2733 is the same as the number of first connection pins 2744. The profiling openings 2733 extend from the side of the insulating member 273 close to the radiator 271 to the side of the insulating member 273 facing away from the radiator 271. The plurality of first connection pins 2744 respectively extend out of the cavity enclosed by the insulating case 270 and the radiator 271 through the plurality of profiling openings 2733 on the insulating member 273.

[0048] In this embodiment, the first connection pin 2744 can be L-shaped. The first connection pin 2744 includes a first straight segment 27441 and a second straight segment 27442. The first straight end is perpendicular to the substrate 2741, and one end of the first straight segment 27441 is connected to the substrate 2741. The second straight end is parallel to the substrate 2741, and one end of the second straight segment 27442 is connected to the end of the first straight segment 27441 facing away from the substrate 2741. The other end of the second straight segment 27442 extends towards the insulating member 273. The second straight end of the first connection pin 2744 passes through the profiling opening 2733.

[0049] In this way, the first connection pin 2744 of the fan driving board 274 passes through the profiling opening 2733 on the insulating member 273 and extends out of the cavity enclosed by the insulating shell 270 and the radiator 271, so that there is a large creepage distance between the first connection pin 2744 and the radiator 271, avoiding the safety risk of the first connection pin 2744 discharging to the radiator 271. At the same time, the fan driving board 274 also realizes fixed connection and electrical connection with the power board 21 through the first connection pin 2744.

[0050] In a schematic embodiment, as Figure 6 、 8 shown, the profiling opening 2733 of the insulating member 273 is arranged as a groove, and the groove is formed by the depression of the side surface of the insulating member 273 that abuts against the protective shell 272. The end face of the protective shell 272 facing the insulating member 273 covers the opening of the groove.

[0051] In this way, during assembly, the fan driving board 274 can be first installed into the protective shell 272, then the first connection pin 2744 is welded to the power board 21, and then the profiling opening 2733 of the insulating member 273 is aligned with the first connection pin 2744, and the insulating member 273 is moved so that the plurality of first connection pins 2744 respectively enter the plurality of profiling openings 2733, and then the insulating member 273 is installed on the protective shell 272, and finally the radiator 271 is installed on the protective shell 272 and abuts against the fan driving board 274. By arranging the profiling opening 2733 of the insulating member 273 as a groove, the assembly of the fan driving module 27 is more convenient.

[0052] In a schematic embodiment, as Figure 6 、 9As shown, the radiator 271 includes a heat dissipation plate 2711 and a plurality of first fins 2712. The heat dissipation plate 2711 can be configured as a flat plate. The heat dissipation plate 2711 is parallel to the substrate 2741. The heat dissipation plate 2711 covers the first opening 2721 of the protective case 272. The plurality of first fins 2712 are all arranged on the surface of the heat dissipation plate 2711 facing away from the protective case 272. The first fins 2712 are configured as straight strip-shaped plates. The first fins 2712 are perpendicular to the heat dissipation plate 2711. The first fins 2712 extend from one side of the heat dissipation plate 2711 to the other side of the heat dissipation plate 2711. The plurality of first fins 2712 are parallel to each other and are arranged at intervals in a direction perpendicular to the first fins 2712.

[0053] The first fins 2712 can increase the contact area between the air and the radiator 271, improve the heat exchange efficiency between the radiator 271 and the air, and the radiator 271 can dissipate heat to the air outside the cavity faster.

[0054] In a schematic embodiment, as Figure 8 shown, the insulating member 273 includes a main body portion 2731 and a plurality of second fins 2732. The main body portion 2731 can be configured as a strip. The main body portion 2731 is arranged at the bottom end of the heat dissipation plate 2711. The two ends of the main body portion 2731 can be respectively aligned with the two ends of the heat dissipation plate 2711. The main body portion 2731 and the heat dissipation plate 2711 jointly cover the first opening 2721 of the protective case 272. The second fins 2732 have the same shape and size as the first fins 2712. The plurality of second fins 2732 are all arranged on the side of the main body portion 2731 facing away from the protective case 272. The plurality of second fins 2732 are parallel to the plurality of first fins 2712. The plurality of second fins 2732 are arranged at intervals. The arrangement direction of the plurality of second fins 2732 is the same as the arrangement direction of the plurality of first fins 2712.

[0055] In this way, the insulating member 273 is provided with the second fins 2732, and it is easily considered as a part of the radiator 271 in appearance, improving the aesthetic degree of the fan drive module 27.

[0056] In a schematic embodiment, the radiator 271 further includes a plurality of struts 2713. The struts 2713 can be straight strip-shaped. The struts 2713 can be cylindrical. The struts 2713 are arranged at the bottom end of the radiator 271. The struts 2713 can be connected to the bottom ends of the first fins 2712 or the heat dissipation plate 2711. In this embodiment, the struts 2713 are connected to the plurality of first fins 2712 close to the insulating member 273. The struts 2713 can vertically penetrate through the plurality of first fins 2712.

[0057] A plurality of relief openings 2734 are provided on the insulating member 273. The relief openings 2734 can be configured as through holes or grooves, and the relief openings 2734 extend from the side of the insulating member 273 close to the radiator 271 to the side of the insulating member 273 facing away from the radiator 271. The relief openings 2734 are for the struts 2713 of the insulating member 273 to pass through.

[0058] A plurality of mounting holes are provided on the power supply board 21. The plurality of mounting holes on the power supply board 21 are aligned with the plurality of relief openings 2734 on the insulating member 273.

[0059] The struts 2713, the relief openings 2734 on the insulating member 273, and the mounting holes on the power supply board 21 are provided in one-to-one correspondence. Each strut 2713 passes through the relief opening 2734 of the insulating member 273 corresponding to the strut 2713 and is inserted into the mounting hole on the power supply board 21 corresponding to the strut 2713, thereby realizing the fixed connection between the strut 2713 and the power supply board 21. The strut 2713 can support the radiator 271, and the radiator 271 can be installed more stably.

[0060] In a schematic embodiment, the strut 2713 is provided and connected to a plurality of first fins 2712 close to the insulating member 273. The extending direction of the strut 2713 is perpendicular to the first fins 2712, and the strut 2713 penetrates through the plurality of first fins 2712 and is connected to the plurality of first fins 2712. The relief openings 2734 are provided on the second fins 2732. The relief openings 2734 are grooves formed by the recess on the side of the second fins 2732 facing away from the main body portion 2731.

[0061] In this way, after the protective case 272 and the insulating member 273 are assembled together, when the radiator 271 is installed again, the radiator 271 can enter the relief opening 2734 from the opening of the groove-shaped relief opening 2734, making the assembly between the radiator 271 and the insulating member 273 simpler.

[0062] In a schematic embodiment, as Figure 7 shown, the fan drive circuit 2742 includes a power semiconductor module 2743. The power semiconductor module 2743 is formed by encapsulating a plurality of power semiconductor devices. The power semiconductor module 2743 can be configured as a substantially hexahedral structure. The power semiconductor module 2743 can be a field effect transistor, a thyristor, or an IGBT. The power semiconductor module 2743 is disposed on the board surface of the substrate 2741 close to the radiator 271.

[0063] The radiator 271 further includes a boss 2714. The boss 2714 can be configured as a straight hexahedron. The boss 2714 is disposed on the side of the heat dissipation plate 2711 facing the fan drive board 274. The top end of the boss 2714 facing away from the heat dissipation plate 2711 abuts against one end of the power semiconductor facing away from the substrate 2741.

[0064] When the fan drive circuit 2742 is operating, the power semiconductor module 2743 generates a large amount of heat. The power semiconductor module 2743 directly abuts against the boss 2714 of the radiator 271, enabling the heat to be quickly transferred to the radiator 271 and then from the radiator 271 to the outside air, thus enhancing the heat dissipation efficiency of the fan drive module 27.

[0065] In a schematic embodiment, as Figure 6 、 9 shown in 10, the boss 2714 is configured as a strip-shaped platform that extends from one side of the substrate 2741 to the other side of the substrate 2741. The side wall of the protective case 272 near one end of the substrate 2741 is further provided with a positioning groove 2725, and the boss 2714 extends into the positioning groove 2725. Two positioning grooves 2725 can be provided, and the two positioning grooves 2725 are located on opposite sides of the protective case 272.

[0066] The boss 2714 extending from one side of the substrate 2741 to the other side of the substrate 2741 is conducive to quickly introducing heat from the boss 2714 to the substrate 2741, accelerating the heat transfer between the boss 2714 and the substrate 2741, thereby enhancing the heat dissipation efficiency. At the same time, the protective case 272 is provided with a positioning groove 2725. When assembling the radiator 271, the boss 2714 of the radiator 271 can be inserted into the positioning groove 2725, thereby achieving the positioning between the radiator 271 and the protective case 272 and reducing the assembly difficulty.

[0067] In a schematic embodiment, as Figure 10 shown, the protective case 272 includes a first side plate 2722, a back plate 2727, and a plurality of support platforms 2723. The first side plate 2722 can be configured as a cylindrical shape. The back plate 2727 can be configured as a flat plate, such as a rectangular flat plate. The back plate 2727 covers one end of the first side plate 2722. The back plate 2727 and the first side plate 2722 enclose an inner cavity 2720. The back plate 2727 is parallel to the substrate 2741 and the heat dissipation plate 2711.

[0068] The support platforms 2723 are arranged in the inner cavity 2720 and are connected to the back plate 2727. The support platforms 2723, the back plate 2727, and the first side plate 2722. A plurality of support platforms 2723 can be spaced apart. The top end of the support platform 2723 facing away from the back plate 2727 abuts against the surface of the substrate 2741 facing away from the radiator 271.

[0069] In this way, the fan drive board 274 is clamped between the radiator 271 and the support platform 272, which can not only firmly fix the fan drive board 274 to prevent the fan drive board 274 from being damaged when the fan drive module 27 drops or collides, but also enable the fan drive board 274 to be in close contact with the radiator 271, enhancing the heat dissipation efficiency.

[0070] In a schematic embodiment, the protective case 272 includes a first buckle 2726. The first buckle 2726 is provided on the back plate 2727. There may be two first buckles 2726. The two first buckles 2726 hook the opposite ends of the substrate 2741.

[0071] In this way, when the substrate 2741 of the fan drive board 274 is installed into the protective case 272, the protective case 272 is snap-connected to the substrate 2741 through the two first buckles 2726. At the same time, the support platform 2723 abuts against the back surface of the substrate 2741, so that the substrate 2741 can be fixed on the protective case 272, which is more convenient for the assembly between the fan drive board 274 and the protective case 272.

[0072] In a schematic embodiment, screw holes are provided on the radiator 271. The screw holes are located on the side of the radiator 271 close to the fan drive board 274. The screw holes may be provided on the top surface of the boss 2714. There may be multiple screw holes.

[0073] As Figure 6 、 7 shown, a first through hole 2745 is provided on the substrate 2741. There may be multiple first through holes 2745. The multiple first through holes 2745 are respectively coaxial with the multiple screw holes on the radiator 271.

[0074] A second through hole 2724 is provided on the support platform 2723. There may be multiple second through holes 2724. The multiple second through holes 2724 are respectively coaxial with the multiple screw holes on the radiator 271.

[0075] The fan drive module 27 further includes screws. There may be multiple screws. The screws, screw holes, first through holes 2745 and second through holes 2724 are arranged in one-to-one correspondence. Each screw sequentially passes through the corresponding second through hole 2724 and first through hole 2745 and is screwed into the screw hole.

[0076] The screws can connect the radiator 271, the fan drive board 274 and the protective case 272 together in sequence. The radiator 271, the fan drive board 274 and the protective case 272 are connected by screws, which is more stable.

[0077] In a schematic embodiment, as Figure 1 shown, a heat dissipation opening 13 is further provided on the box body 1. The heat dissipation opening 13 can be configured as a rectangular opening, penetrating the wall surface of the box body 1.

[0078] The fan driving module 27 is arranged inside the box body 1. The side of the radiator 271 facing away from the protective case 272 covers the heat dissipation opening 13 of the box body 1. The radiator 271 can be configured as a fin radiator, and the side of the radiator 271 provided with the first fins 2712 covers the heat dissipation opening 13.

[0079] When the fan driving board 274 is working, a large amount of heat is generated. This heat is transferred to the radiator 271 and then directly transferred to the air outside the box body 1 through the radiator 271, so that the temperature inside the electric control box 100 can be maintained at an appropriate temperature, avoiding the overheating of the temperature inside the electric control box 100, which may cause the electrical components inside the electric control box 100 to malfunction.

[0080] In a schematic embodiment, the position of the heat dissipation opening 13 is not limited. The heat dissipation opening 13 can be arranged on the side, top or bottom of the box body 1. In this embodiment, the heat dissipation opening 13 is arranged on a side of the box body 1.

[0081] In a schematic embodiment, as Figures 1 to 4 shown, the box body 1 is configured as a box-shaped structure. The box body 1 can be configured as a roughly rectangular box. The box body 1 can be made of an insulating material, such as plastic. The electric control board 2 is accommodated in the box body 1. A control circuit of the air conditioner indoor unit is arranged on the electric control board 2 for controlling the operation of each executing component of the air conditioner indoor unit.

[0082] The electric control board 2 includes a control board 22, as well as the above-mentioned power board 21 and the fan driving module 27. The power board 21 is configured as a flat plate, and this flat plate can be a rectangular flat plate. The power board 21 is arranged at the bottom of the box body 1. The power board 21, the control board 22 and the fan driving board 274 can all be printed circuit boards. The control board 22 and the fan driving board 274 are both arranged on one side of the power board 21 close to the top of the box body 100, and the control board 22 is electrically connected to the power board 21. The power board 21 is configured to convert industrial frequency alternating current into direct current to supply power to the control board 22 and the fan driving board 274. The control board 21 is the logic control unit of the air conditioner indoor unit. The fan driving board 274 is electrically connected to the fan. The fan driving board 274 is configured to drive the fan of the air conditioner indoor unit under the control of the control board 22. The control board 22 and the fan driving board 274 are electrically connected, and the control board 22 and the fan driving board 274 can be electrically connected through the power board 21 or through wires.

[0083] In the technical solution of the present application, the electronic control board 2 is formed by splicing multiple circuit boards such as a power supply board 21, a control board 22, and a fan drive module 27. The control board 22 and the fan drive module 27 are located on one side of the power supply board 21, which can make full use of the height space of the electronic control box 100, reduce the length and width dimensions 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 body 1, increase the flow area of the air duct of the indoor air conditioner, and reduce the resistance of the air in the air duct, thereby increasing the air volume of the indoor air conditioner.

[0084] In a schematic embodiment, the fan drive modules 27 are all located on the same side of the power supply board 21. The control board 22 and the fan drive board 274 are both fixedly connected to the power supply board 21, and the control board 22 and the fan drive board 274 are both perpendicular to the power supply board 21.

[0085] The control board 22 and the fan drive board 274 can be plugged onto the power supply board 21 through connectors, which can not only realize the fixed connection between the power supply board 21 and the control board 22 and the fan drive board 274 respectively, but also realize the electrical connection between the power supply board 21 and the control board 22 and the fan drive board 274 respectively.

[0086] The control board 22 and the fan drive board 274 can also be directly welded onto the power supply board 21, simultaneously realizing the fixed connection and electrical connection between the power supply board 21 and the control board 22 and the fan drive board 274.

[0087] In this way, the control board 22 and the fan drive board 274 are connected to the same side of the power supply board 21 and are both perpendicular to the power supply board 21. The projection areas of the control board 22 and the fan drive board 274 on the power supply board 21 are small, and the area occupied on the power supply board 21 is small. The remaining space on the power supply board 21 can be used to arrange electrical components, so that the power supply board 21 can be made smaller, further reducing the volume of the electronic control box 100.

[0088] In a schematic embodiment, as Figure 16 shown, the power supply board 21 is provided with a first docking hole 212 and a second docking hole 211. The second docking hole 211 and the first docking hole 212 are through holes.

[0089] The control board 22 is configured as a flat plate, which can be a rectangular flat plate. The control board 22 is arranged on one side of the power supply board 21 and is perpendicular to the power supply board 21. One end of the control board 22 is provided with a second connection pin 221. The second connection pin 221 is inserted into the second docking hole 211 of the power supply board 21 and is welded to the power supply board 21. An electrical connection is formed between the control board 22 and the power supply board 21.

[0090] The fan drive board 274 of the fan drive module 27 is configured as a flat plate, which can be a rectangular flat plate. The fan drive board 274 is disposed on one side of the power supply board 21 and perpendicular to the power supply board 21. One end of the fan drive board 274 is provided with a first connection pin 2744. The first connection pin 2744 of the fan drive board 274 is inserted into the first docking hole 212 of the power supply board 21 and welded to the power supply board 21. An electrical connection is formed between the fan drive board 274 and the power supply board 21.

[0091] In this way, the second connection pin 221 of the control board 22 is inserted into the second docking hole 211 of the power supply board 21 and welded to the power supply board 21, which can not only form a firm fixed connection between the power supply board 21 and the control board 22, but also enable the control board 22 to form an electrical connection with the power supply board 21 through the second connection pin 221. The first connection pin 2744 of the fan drive board 274 is inserted into the first docking hole 212 of the power supply board 21 and welded to the power supply board 21, which can not only form a firm fixed connection between the power supply board 21 and the fan drive board 274, but also enable the fan drive board 274 to form an electrical connection with the power supply board 21 through the first connection pin 2744.

[0092] In a schematic embodiment, the second docking hole 211 and the first docking hole 212 are configured as through holes, and the shape of the through hole is not limited. The shape of the through hole can be circular, square, strip-shaped or other shapes. The second docking hole 211 and the first docking hole 212 are respectively close to two sides of the power supply board 21, and these two sides can be two adjacent sides of the power supply board 21, or these two sides can also be two opposite sides of the power supply board 21.

[0093] In this embodiment, the second docking hole 211 and the first docking hole 212 are configured as strip-shaped through holes. The second docking hole 211 and the first docking hole 212 are respectively close to two adjacent sides of the power supply board 21, and the second docking hole 211 and the first docking hole 212 respectively extend along two adjacent sides of the power supply board 21.

[0094] In this way, the fan drive module 27 and the control board 22 are respectively located on two sides of the power supply board 21, and the electrical components on the power supply board 21 can be centrally arranged in the remaining area of the power supply board 21, which is beneficial to further increase the power density of the electronic control board 2 and reduce the volume of the electronic control box 100.

[0095] In another schematic embodiment, the control board 22 and the fan drive board 274 are parallel to the power supply board 21, and the control board 22 and the fan drive module 27 are placed flat on the power supply board 21. The control board 22 and the fan drive module 27 can be located on the same side of the power supply board 21, or the control board 22 and the fan drive module 27 can also be respectively located on opposite sides of the power supply board 21.

[0096] 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 electric control box 100, reduce the length and width dimensions of the electric control box 100, make the area occupied by the electric control box 100 smaller, realize the miniaturization of the electric control box 100, improve the power density of the electric control box 100, reduce the volume occupied by the box body 1, increase the flow area of the air duct of the air conditioner indoor unit, and reduce the resistance of the air in the air duct, thereby increasing the air volume of the air conditioner indoor unit.

[0097] In a schematic embodiment, a wiring opening 10 is provided on the box body 1, and the wiring opening 10 is a through hole. The number of the wiring openings 10 is not limited, and one wiring opening 10 can be provided, or multiple wiring openings 10 can be provided.

[0098] The control box further includes a plurality of wiring terminals 3. The plurality of wiring terminals 3 are all arranged on the electric control board 2. The wiring terminals 3 can be welded on the electric control board 2 and are electrically connected to the electric control board 2. The wiring terminals 3 are used to realize the electrical connection between the electric control board 2 and other electrical components in the indoor unit of the air conditioner. The plurality of wiring terminals 3 are all exposed through the wiring opening 10. The plurality of wiring terminals 3 can be electrically connected to a power supply, an electronic expansion valve, a display panel, a wire controller, a fan, an electric heater, and a temperature sensor respectively through wires. The plurality of wiring terminals 3 are all exposed outside through the wiring opening 10 on the box body 1. The plurality of wiring terminals 3 can be exposed outside through the same wiring opening 10 on the box body 1, or can be exposed outside through a plurality of wiring openings 10 on the box body 1.

[0099] In the embodiment of the present application, the box body 1 of the electric control box 100 houses the electric control board 2 and plays a role in protecting the electric control board 2. During the installation, debugging, and maintenance of the air conditioner, all the wiring terminals 3 of the electric control box 100 are exposed through the wiring opening 10 on the box body 1, and the staff can wire all the wiring terminals 3 without opening the box body 1 of the electric control box 100. This operation method can greatly reduce the possibility of wiring misoperation and reduce the probability of damage to the electric control board 2.

[0100] In a schematic embodiment, as Figure 2 、 4As shown, a plurality of terminal blocks 3 include a fan terminal block 35. The fan terminal block 35 is welded to the electronic control board 2. The fan terminal block 35 is used to connect the wire of the fan of the air conditioner indoor unit. The electronic control box 100 is connected to the wire of the fan through the fan terminal block 35. The fan terminal block 35 can be located at the top or side of the box body 1. The fan terminal block 35 is exposed through a wiring opening 10 provided on the top or side of the box body 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. The fan drive board 274 is electrically connected to the fan terminal block 35. The fan drive board 274 can output a drive current to the fan terminal block 35 to drive the fan to operate.

[0101] In this way, the fan terminal block 35 is located at the top or side of the box body 1 and is exposed from the top or side of the box body 1. Without opening the box body 1 of the electronic control box 100, the wire of the fan can be connected to the fan terminal block 35 of the electronic control box 100. At the same time, during the wiring process, the fan terminal block 35 can be quickly identified, which can prevent damage to the electronic control board 2 caused by incorrect wiring on the fan terminal block 35.

[0102] In a schematic embodiment, a third docking hole 213 is provided on the power supply board 21. The third docking holes 213 are all configured as strip-shaped through holes. The third docking hole 213 is close to the first docking hole 212.

[0103] The electronic control board 2 further includes a fan wiring board 23. The fan wiring board 23 is configured as a flat plate, which can be a rectangular flat plate. The fan wiring board 23 can be a printed circuit board. The fan wiring board 23 is provided on the side of the power supply board 21 facing away from the bottom case 11 and is perpendicular to the power supply board 21. One end of the fan wiring board 23 is provided with a third connection pin. The third connection pin of the fan wiring board 23 is inserted into the third docking hole 213 of the power supply board 21 and is welded to the power supply board 21. An electrical connection is formed between the fan wiring board 23 and the power supply board 21. The fan terminal block 35 is provided at one end of the fan wiring board 23 facing away from the third connection pin.

[0104] The fan terminal block 35 is provided at one end of the fan wiring board 23 facing away from the power supply board 21.

[0105] In this way, the third connection pin of the fan wiring board 23 is inserted into the third docking hole of the power supply board 21 and is welded to the power supply board 21, which can not only form a firm fixed connection between the power supply board 21 and the fan wiring board 23, but also enable the fan wiring board 23 to form an electrical connection with the power supply board 21 through the third connection pin. At the same time, the fan drive circuit 2742 can be electrically connected to the fan terminal block 35 through the power supply board 21 and the fan wiring board 23.

[0106] In a schematic embodiment, asFigure 3 , 4 As shown in 4 , the multiple wiring terminals 3 further include a power line terminal 31 and a communication line terminal 32. The power line terminal 31 is welded to the electronic control board 2. The power line terminal 31 is used to connect the power line of the air conditioner indoor unit. The power line is a wire that supplies power to the air conditioner indoor unit. One end of the power line principle power line terminal 31 is connected to the mains power grid. The power line terminal 31 is located on the side of the box body 1. The wiring opening 10 includes a power supply wiring opening 101. The power supply wiring opening 101 is provided on the side of the box body 1. The power line terminal 31 is exposed on the side of the box body 1 through the power supply wiring opening 101.

[0107] The communication line terminal 32 is welded to the electronic control board 2. The communication line terminal 32 is used to connect the communication line of the air conditioner indoor unit. In this embodiment, at least two communication line terminals 32 are provided. One communication line terminal 32 is connected to the air conditioner outdoor unit of the air conditioner through a communication line, and the other communication line terminal 32 is connected to the wired controller through a communication line. The communication line terminal 32 is located on the side of the box body 1. The wiring opening 10 includes a communication wiring opening 102. The communication wiring opening 102 is provided on the side of the box body 1. The communication line terminal 32 is exposed on the side of the box body 1 through the communication wiring opening 102.

[0108] In this way, both the power line terminal 31 and the communication line terminal 32 are located on the side of the box body 1 and are exposed from the side of the box body 1. Without opening the box body 1 of the electronic control box 100, the power line and the communication line can be respectively connected to the power line terminal 31 and the communication line terminal 32 of the electronic control box 100. At the same time, during the wiring process, the power line terminal 31 and the communication line terminal 32 can be quickly identified, which can prevent the power line with strong electrical properties from being wrongly connected to the communication line with weak electrical properties, resulting in damage to the electronic control board 2.

[0109] In a schematic embodiment, both the power line terminal 31 and the communication line terminal 32 are located on the same side of the box body 1. Both the power line terminal 31 and the communication line terminal 32 are configured as screw-type wiring terminals. The screw-type wiring terminal has a screw and a clamping block, and the clamping block can be pushed down by rotating the screw to clamp the wire. The screw-type wiring terminal has high reliability in connecting wires, can fasten the wire through the screw, provide a stable electrical connection, and is not easily loosened due to factors such as vibration and impact.

[0110] By arranging the power line terminal 31 and the communication line terminal 32 on the same side of the box body 1, the communication line and the power line can be routed from the same side of the box body 1, which is convenient for routing and wiring of the communication line and the power line.

[0111] In a schematic embodiment, both the power line terminal 31 and the communication line terminal 32 are located on the top of the box body 1. The power line terminal 31 and the communication line terminal 32 are exposed through the wiring opening 10 provided on the top of the box body 1.

[0112] The power cord and the communication line can be respectively connected to the power supply terminal 31 and the communication line terminal 32 from above the box body 1, which facilitates the wiring of the power supply terminal 31 and the communication line terminal 32.

[0113] In a schematic embodiment, such as Figure 11 , 12 shown, the box body 1 includes a bottom shell 11 and an upper cover 12. The bottom shell 11 includes a bottom plate 1111 and a second side plate 1112. The second side plate 1112 is configured as a cylindrical shape, and the bottom plate 1111 covers the bottom end of the second side plate 1112. The bottom plate 1111 can be configured as a rectangular flat plate, and the second side plate 1112 extends along the edge of the bottom plate 1111. An opening is provided at the top end of the bottom shell 11, and the opening is enclosed by the top end of the second side plate 1112.

[0114] The upper cover 12 is fixedly connected to the bottom shell 11. The connection between the upper cover 12 and the bottom shell 11 can be a snap connection, a screw connection or an ultrasonic welding. The upper cover 12 covers the opening of the bottom shell 11. The bottom shell 11 and the upper cover 12 enclose a cavity, and the cavity houses the electronic control board 2. All the wiring openings 10 are provided on the upper cover 12.

[0115] The power supply board 21 is laid flat in the bottom shell 11. The control board 22 and the fan drive module 27 are both arranged on the side of the power supply 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 upper cover 12. The fan wiring opening 105 is provided at the top of the cover shell 121 of the upper cover 12.

[0116] The box body 1 is configured as a split design of the bottom shell 11 and the upper cover 12. After the electronic control board 2 is installed on the bottom shell 11, the upper cover 12 can be covered on the bottom shell 11, which facilitates the installation of the electronic control board 2. The wiring openings 10 are all provided on the upper cover 12, and the wiring terminals 3 are exposed from the wiring openings 10 on the upper cover 12, which is more convenient for the wiring of the wiring terminals 3.

[0117] In a schematic embodiment, such as Figure 2 , 12 shown, the upper cover 12 includes a cover shell 121 and an insulating protrusion 122. The cover shell 121 arches in a direction away from the bottom shell 11. The cover shell 121 is configured as a cover-like structure. The insulating protrusion 122 is configured as a strip-shaped protrusion. The insulating protrusion 122 is provided on the outer side wall of the cover shell 121, and can be located at the middle position of the outer side wall. The insulating protrusion 122 extends from one end of the outer side wall of the cover shell 121 close to the bottom shell 11 to the other end of the outer side wall of the cover shell 121 away from the bottom shell 11.

[0118] The power connection opening 101 and the communication connection opening 102 are two notches on the upper cover 12. The power connection opening 101 and the communication connection opening 102 are located outside the housing 121 and on opposite sides of the insulating protrusion 122.

[0119] The power line terminal 31 extends out of the upper cover 12 through the power connection opening 101 in a direction away from the bottom case 11. The communication line terminal 32 extends out of the upper cover 12 through the communication connection opening 102 in a direction away from the bottom case 11.

[0120] 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, and it can prevent the electrical components on the electronic control board 2 from being damaged due to creepage between the power line terminal 31 and the communication line terminal 32.

[0121] In a schematic embodiment, as Figure 4 shown, an insulating cover 24 is provided on the electronic control board 2. One or more insulating covers 24 can be provided. The insulating cover 24 extends out of the box body 1 through the communication connection opening 102 on the upper cover 12. A plurality of isolation chambers 241 are provided in the insulating cover 24, and the number of isolation chambers 241 can be two. The isolation chambers 241 are separated from each other. Each isolation chamber 241 is provided with an installation opening that extends from the side of the isolation chamber 241 facing away from the housing 121 to the top of the isolation chamber 241. A plurality of communication line terminals 32 are provided, and the plurality of communication line terminals 32 are respectively located in different isolation chambers 241.

[0122] In this way, when wiring, the communication line can extend into the isolation chamber 241 of the insulating cover 24 through the installation opening of the insulating cover 24 and be connected to the communication line terminal 32. Adjacent two communication line terminals 32 are separated, and short circuit between the communication line terminals 32 can be avoided, thus preventing damage to the electronic control board 2. At the same time, the insulating cover 24 covers the communication line terminal 32. When wiring, the staff can identify the wiring terminal 3 in the insulating cover 24 as the communication line terminal 32 according to the appearance of the insulating cover 24, and it is not easy to connect the communication line terminal 32 wrongly.

[0123] In a schematic embodiment, as Figure 4As shown in the figure, an insulating bracket 25 is provided on the electronic control board 2. The insulating bracket 25 includes a plurality of insulating plates 251 and a connecting plate 252. The insulating plate 251 can be configured as a flat plate, and the insulating plate 251 extends out of the upper cover 12 of the box body 1 from the power supply wiring opening 101 of the upper cover 12. The plurality of insulating plates 251 are parallel to each other. The plurality of insulating plates 251 are arranged at intervals in sequence in a direction perpendicular to the plate surface of the insulating plate 251. The connecting plate 252 is perpendicular to the insulating plate 251. The connecting plate 252 is located at the same end of the insulating plate 251, and the connecting plate 252 is fixedly connected to all the insulating plates 251.

[0124] A plurality of power supply line terminals 31 are provided, and one power supply line terminal 31 is provided between every two adjacent insulating plates 251.

[0125] Two adjacent power supply line terminals 31 are separated from each other by the insulating plate 251, which can prevent short circuits between the power supply line terminals 31 and damage the electronic control board 2. At the same time, the power supply line terminals 31 are arranged in the insulating bracket 25. When wiring, the staff can identify the wiring terminals 3 in the insulating bracket 25 as the power supply line terminals 31 according to the appearance of the insulating bracket 25, and it is not easy to connect the power supply line terminals 31 wrongly.

[0126] In a schematic embodiment, as Figure 11 、 12 shown, a first mounting through hole 123 is provided on the housing 121 of the upper cover 12. The first mounting through hole 123 can be a round hole. A second mounting through hole 111 is provided on the bottom case 11. The second mounting through hole 111 can be a round hole. The first mounting through hole 123 and the second mounting through hole 111 are coaxially arranged.

[0127] As Figure 4 shown, a third mounting through hole 210 is provided on the power supply board 21 of the electronic control board 2. The third mounting through hole 210 can be a round hole. The third mounting through hole 210 is coaxially arranged with the first mounting through hole 123 and the second mounting through hole 111. Since the electronic control board 2 is located in the box body 1, the third mounting through hole 210 is located between the first mounting through hole 123 and the second mounting through hole 111. A grounding terminal for grounding is also provided on the power supply board 21 of the electronic control board 2. The grounding terminal can be configured as a pad or a solder joint. The grounding terminal is located around one end of the third mounting through hole 210 close to the upper cover 12. The diameter of the second mounting through hole 111 is equal to the diameter of the first mounting through hole 123. The diameter of the third mounting through hole 210 is smaller than the diameter of the first mounting through hole 123.

[0128] The electronic control box 100 further includes a grounding screw (not shown in the figure). The grounding screw is a metal screw. The grounding screw includes a head and a screw rod. One end of the screw rod is connected to the head, and the diameter of the head is larger than that of the screw rod. The diameter of the head of the grounding screw is smaller than the diameter of the first mounting through hole 123 on the upper cover 12 and larger than the diameter of the third mounting through hole 210. The diameter of the screw rod of the grounding screw is smaller than the diameter of the third mounting through hole 210. The head of the grounding screw abuts against the grounding terminal. The screw rod of the grounding screw passes through the second mounting through hole 111 on the electronic control board 2 and the third mounting through hole 210 on the bottom case 11, There are screw holes provided on the sheet metal part of the casing of the air conditioner indoor unit, and the sheet metal part is grounded. The screw holes on the sheet metal part are coaxially arranged with the second mounting through holes 111 on the bottom case 11.

[0129] During the process of installing the electronic control box 100 onto the casing, first align the second mounting through hole 111 on the electronic control box 100 with the screw holes on the sheet metal part of the casing, and then sequentially pass the screw rod of the grounding screw through the first mounting through hole 123 of the upper cover 12, the third mounting through hole 210 of the electronic control board 2, and the second mounting through hole 111 of the bottom case 11 and then screw it into the screw holes of the sheet metal part of the casing until the head of the grounding screw abuts against the grounding terminal, so that the grounding screw electrically connects the grounding terminal of the electronic control box 100 to the grounded sheet metal part of the casing, thereby realizing the grounding of the electronic control board 2. By adopting this ground wire wiring method, it is not necessary to open the box body 1 of the electronic control box 100, the wiring is more convenient and fast, and it can also avoid the operation of miswiring the grounding terminal.

[0130] In a schematic embodiment, the plurality of wiring terminals 3 further includes an electric auxiliary heating wiring terminal 33. The electric auxiliary heating wiring terminal 33 is welded on the electronic control board 2. The electric auxiliary heating wiring terminal 33 is used to connect the wire of the electric heater of the air conditioner indoor unit. The electric auxiliary heating wiring terminal 33 is located at the side or top of the box body 1. The wiring opening 10 includes a load wiring opening 103. The load wiring opening 103 can be provided at the side or top of the box body 1. The electric auxiliary heating wiring terminal 33 is exposed outside the box body 1 through the load wiring opening 103. In some embodiments, the load wiring opening 103 is provided at the top of the cover shell 121.

[0131] In this way, the electric auxiliary heating wiring terminal 33 is located at the top or side of the box body 1 and is exposed from the top or side of the box body 1. Without opening the box body 1 of the electronic control box 100, the wire of the electric heater can be connected to the electric auxiliary heating wiring terminal 33 of the electronic control box 100. At the same time, during the wiring process, the electric auxiliary heating wiring terminal 33 can be quickly identified, which can prevent damage to the electronic control board 2 caused by miswiring on the electric auxiliary heating wiring terminal 33.

[0132] In a schematic embodiment, the electronic control board 2 includes an insulating housing 261 and a switch circuit 215. The switch circuit 215 includes a relay. The switch circuit 215 is disposed within the insulating housing 261. The insulating housing 261 is located below the load connection opening 103 of the box body 1. The electric auxiliary heating connection terminal 33 is configured as a socket. One end of the electric auxiliary heating connection terminal 33 facing the inside of the box body 1 is connected to the top end of the insulating housing 261, and one end of the electric auxiliary heating connection terminal 33 facing the outside of the box body 1 is located within the load connection opening 103 of the box body 1. The switch circuit 215 is electrically connected to the power supply line terminal 31 and the electric auxiliary heating connection terminal 33. The switch circuit 215 is used to conduct and disconnect the circuit between the power supply line terminal 31 and the electric auxiliary heating connection terminal 33, so as to turn on and off the electric heater of the air conditioner indoor unit.

[0133] In this way, the electric auxiliary heating connection terminal 33 is configured as a socket, and the wire of the electric heater can be conveniently plugged into the electric auxiliary heating connection terminal 33. At the same time, one end of the electric auxiliary heating connection terminal 33 facing the outside of the box body 1 is located within the load connection opening 103 of the box body 1, and one end of the electric auxiliary heating connection terminal 33 facing the outside of the box body 1 is substantially flush with the box body 1, which is convenient for the staff to identify the electric auxiliary heating connection terminal 33. At the same time, the electric auxiliary heating connection terminal 33 does not protrude from the box body 1, and the box body 1 can protect the electric auxiliary heating connection terminal 33 from being damaged.

[0134] In a schematic embodiment, the wiring opening 10 on the box body 1 includes a weak current wiring opening 104. The plurality of connection terminals 3 includes a plurality of weak current connection terminals 34. At least three weak current connection terminals 34 are respectively used to connect the wires of the temperature sensor, the electronic expansion valve, and the display board.

[0135] The weak current wiring opening 104 can be provided on the top of the box body 1. The plurality of weak current connection terminals 34 are all located on the top of the box body 1, and the plurality of weak current connection terminals 34 are exposed outside the box body 1 through the weak current wiring opening 104 located on the top of the box body 1. The weak current wiring opening 104 can also be provided on the side of the box body 1. The plurality of weak current connection terminals 34 are all located on the side of the box body 1, and the plurality of weak current connection terminals 34 are exposed outside the box body 1 through the weak current wiring opening 104 located on the side of the box body 1.

[0136] In this way, the weak current connection terminals 34 are located on the top or side of the box body 1 and are exposed from the top or side of the box body 1. The wire can be connected to the weak current connection terminals 34 of the corresponding electric control box 100 without opening the box body 1 of the electric control box 100. At the same time, during the wiring process, the weak current connection terminals 34 can be quickly identified, and wrong wiring on the weak current connection terminals 34 can be prevented from damaging the electronic control board 2.

[0137] In a schematic embodiment, the low-voltage wiring terminal 34 is configured as a jack. One end of the low-voltage wiring terminal 34 faces outside the box body 1 and is located within the low-voltage wiring opening 104.

[0138] In this way, the low-voltage wiring terminal 34 is configured as a jack, and the wires of the temperature sensor, the electronic expansion valve, and the display board can be conveniently plugged into the corresponding low-voltage wiring terminal 34. At the same time, the end of the low-voltage wiring terminal 34 facing outside the box body 1 is located within the load wiring opening 103 of the box body 1, and the end of the low-voltage wiring terminal 34 facing outside the box body 1 is substantially flush with the box body 1. This not only facilitates the identification of the low-voltage wiring terminal 34 by the staff but also ensures that the low-voltage wiring terminal 34 does not protrude from the box body 1, and the box body 1 can protect the low-voltage wiring terminal 34 from damage.

[0139] In a schematic embodiment, the power line terminal 31, the communication line terminal 32, the insulating cover 24, the insulating bracket 25, the insulating outer shell 261, and the switch circuit 215 are all arranged on the side of the power supply board 21 facing away from the bottom shell 11. The power line terminal 31, the communication line terminal 32, the insulating cover 24, and the insulating bracket 25 can be arranged at the same end of the power supply board 21. The third mounting through hole 210 is provided on the power supply board 21 and vertically penetrates the power supply board 21.

[0140] A plurality of low-voltage wiring terminals 34 are all arranged at one end of the control board 22 facing away from the second connection pin 221. The plurality of low-voltage wiring terminals 34 are arranged at intervals in sequence along the edge of the control board 22.

[0141] As Figure 16 、 17 shown, a filter rectifier circuit 216 and a power supply circuit 214 are also provided on the power supply board 21. A fan drive circuit 2742 is also provided on the fan drive board 274. A main control circuit 222, a communication circuit 225, a sensor circuit 223, and a valve drive circuit 224 are also provided on the control board 22. The main control circuit 222 is a microcomputer or a single-chip microcomputer.

[0142] The power line terminal 31 is connected to the power line and is used to supply power to the entire electric control box 100. The power line terminal 31 is electrically connected to the switch circuit 215 and the filter rectifier circuit 216. The switch circuit 215 is connected to the electric heater through the electric auxiliary heating wiring terminal 33. The switch circuit 215 is electrically connected to the main control circuit 222, and the main control circuit 222 can switch the electric heater through the switch circuit 215.

[0143] The power cord terminal 31 is electrically connected to the filter rectifier circuit 216. The filter rectifier circuit 216 is electrically connected to the fan drive circuit 2742 on the fan drive board 274. The filter rectifier circuit 216 is used to rectify and filter the industrial frequency alternating current input by the power cord terminal 31 into direct current, and deliver the direct current to the fan drive circuit 2742 on the fan drive board 274 and the power supply circuit 214 on the power supply board 21. The filter rectifier circuit 216 can also be configured to suppress common mode noise, reduce the interference of the frequency conversion circuit to the power grid, so as to ensure the stability of the power grid and reduce the electromagnetic interference to the power grid.

[0144] The fan drive circuit 2742 is electrically connected to the main control circuit 222. The fan drive circuit 2742 is controlled by the main control circuit 222, and converts the direct current output by the filter rectifier circuit 216 into the drive current of the fan, and delivers the drive current to the fan through the fan wiring terminal 35 to drive the fan to operate.

[0145] 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 cord terminal 31. The power supply circuit 214 can convert the industrial frequency alternating current input by the power cord terminal 31 into direct current to supply power to the circuits on the main control board 22, such as supplying power to the main control circuit 222. The voltage of the direct current is less than or equal to 36V, and the direct current can be 5V, 8V, 12V or 24V.

[0146] The communication circuit 225, the sensor circuit 223 and the 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 main control circuit 222 and the controller of the outdoor unit of the air conditioner and the wired controller respectively. The communication circuit 225 is connected to the outdoor unit of the air conditioner and the wired controller through two communication line terminals 32 respectively. The communication circuit 225 is used to communicate with the controller of the outdoor unit of the air conditioner, and is used to communicate with the wired controller. The main control circuit 222 can transmit information such as temperature setting value, compressor frequency command, electronic expansion valve opening, fault code, sensor measurement data, etc. to the controller of the outdoor unit of the air conditioner through the communication circuit 225 via the RS-485 bus or power line carrier.

[0147] The sensor circuit 223 is used to collect environmental parameters and convert them into electrical signals for the main control circuit to make decisions. The environmental parameters include temperature parameters and humidity parameters. The sensor circuit 223 is connected to the weak current wiring terminal 34, and is connected to the sensor of the indoor air conditioner through the weak current wiring terminal 34. The sensor circuit 223 includes a temperature sampling circuit. The temperature sampling circuit is connected to the temperature sensor through a weak current wiring terminal 34. The temperature sampling circuit is used to convert the temperature signal collected by the temperature sensor into an electrical signal, and deliver the electrical signal to the main control circuit 222.

[0148] The sensor circuit 223 further includes a humidity sampling circuit. The humidity sampling circuit is connected to the humidity sensor through a weak-current 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.

[0149] The valve drive circuit 224 is connected to the electronic expansion valve through a weak-current terminal 34. The valve drive circuit 224 can be a motor drive circuit. The valve drive circuit 224 is used to output a drive current to the electronic expansion valve under the control of the main control circuit 222 to adjust the opening degree of the electronic expansion valve.

[0150] In a schematic embodiment, as Figure 8 shown, the electronic control box 100 further includes a first sealant layer 41. The first sealant layer 41 fills the gap between the bottom case 11 and the surface of the power supply board 21 facing away from the control board 22. The gap between the bottom case 11 and the power supply board 21 can be filled with potting glue by potting, and the first sealant layer 41 is formed after the potting glue solidifies. The potting glue can be UV glue. The first sealant layer 41 can fill the gap between the bottom case 11 and the power supply board 21, prevent water and dust from entering the gap and causing damage to the power supply board 21, and improve the reliability of the power supply board 21.

[0151] In a schematic embodiment, as Figure 11 shown, an isolation ring 112 is further provided on one side of the bottom case 11 close to the power supply board 21. The isolation ring 112 is configured as a circular protrusion, and the isolation ring 112 can be circular. The isolation ring 11 and the bottom case 11 can be an integrally formed structure. One end of the isolation ring 112 surrounds the second mounting through hole 111 on the bottom case 11, and the isolation ring 112 can be coaxially arranged with the second mounting through hole 111. The other end of the isolation ring 112 abuts against the surface of the power supply board 21 facing away from the control board 22. The end of the isolation ring 112 abutting against the power supply board 21 surrounds the third mounting through hole 210 on the power supply board 21.

[0152] In this way, when the potting glue is filled into the gap between the bottom case 11 and the power supply board 21, the potting glue will not flow into the second mounting through hole 111, which can not only ensure the smoothness of the second mounting through hole 111, so that the grounding screw can pass through the second mounting through hole 111, but also ensure that the potting glue will not overflow from the second mounting through hole 111.

[0153] In a schematic embodiment, as Figure 8As shown, the electronic control box 100 further includes a second sealant layer 42. The second sealant layer 42 covers the surface of the power supply board 21 facing the control board 22. The potting compound can be delivered to the surface of the power supply board 21 facing the control board 22 by means of injecting glue, and the second sealant layer 42 is formed after the potting compound solidifies. The potting compound can be UV glue. The second sealant layer 42 can completely cover the surface of the power supply board 21 facing the control board 22. The thickness of the second sealant layer 42 is greater than or equal to the maximum distance between the main body part 2731 of the electronic components on the surface of the power supply board 21 facing the control board 22 and the power supply board 21. The second sealant layer 42 potting-seals all the pins of the electronic components on the surface of the power supply board 21.

[0154] In this way, the second sealant layer 42 can isolate the air from the power supply board 21, avoiding moisture and dust from soiling the power supply board 21. At the same time, the second potting-sealant layer potting-seals all the pins of the electronic components on the surface of the power supply board 21, which can not only improve the electrical insulation performance, but also prevent the electronic components from falling off when the electronic control box 100 vibrates, further improving the reliability of the power supply board 21.

[0155] In a schematic embodiment, as Figure 4 、 15 shown, the electronic control box 100 further includes a glue-blocking cylinder 5. The glue-blocking cylinder 5 is arranged on the surface of the power supply board 21 facing away from the bottom case 11. The glue-blocking cylinder 5 includes a cylinder body 51 and a connecting column 52. One end of the connecting column 52 is connected to the cylinder body 51, and the other end of the connecting column 52 is connected to the power supply board 21. The connecting column 52 can be inserted into the power supply board 21. The cylinder body 51 is configured as a cylindrical structure. One end of the cylinder body 51 abuts against the surface of the power supply board 21 facing the control board 22. The cylinder body 51 surrounds the third mounting through-hole 210 of the power supply board 21. The height of the cylinder body 51 in its axial direction is greater than the thickness of the second sealant layer 42. The second sealant layer 42 is located outside the cylinder body 51.

[0156] In this way, when the potting compound is delivered to the surface of the power supply board 21 facing the control board 22, it can prevent the potting compound from entering the third mounting through-hole 210 of the power supply board 21, ensuring that the third mounting through-hole 210 is unobstructed, so that the screw rod of the grounding screw can smoothly pass through the third mounting through-hole 210 during subsequent installation.

[0157] In a schematic embodiment, as Figure 12As shown in the figure, a guiding cylinder 124 is further provided on the housing 121 of the upper cover 12. The guiding cylinder 124 is configured as a straight tubular structure. The guiding cylinder 124 extends from the first mounting through-hole 123 of the upper cover 12 to the third mounting through-hole 210 on the power supply board 21. One end of the guiding cylinder 124 close to the first mounting through-hole 123 on the upper cover 12 is fixed on the housing 121, and the guiding cylinder 124 and the housing 121 may be of an integrally formed structure. One end of the guiding cylinder 124 close to the third mounting through-hole 210 on the power supply board 21 abuts against the surface of the power supply board 21 facing the control board 22 and is inserted into the barrel 51 of the rubber baffle cylinder 5.

[0158] In this way, when installing the grounding screw, the grounding screw is fed into the guiding cylinder 124 from the first mounting through-hole 123, and the grounding screw can slide along the guiding cylinder 124 into the third mounting through-hole 210, making the installation of the grounding screw more convenient.

[0159] In another exemplary embodiment, as Figure 12 , 13 shown, the electric control board 2 includes an insulating housing 261 and a switch circuit 215. The switch circuit 215 may include a relay. The switch circuit 215 is disposed within the insulating housing 261. The top end of the insulating housing 261 seals the load wiring opening 103a of the box body 1. The electric auxiliary heating wiring terminal 33 is connected to the top end of the insulating housing 261 and extends out of the box body 1 from the load wiring opening 103a. The switch circuit 215 is electrically connected to the power supply line terminal 31 and the electric auxiliary heating wiring terminal 33. The switch circuit 215 is used to conduct and disconnect the circuit between the power supply line terminal 31 and the electric auxiliary heating wiring terminal 33, thereby realizing the switching of the electric heater in the indoor unit.

[0160] The insulating housing 261 seals the load wiring opening 103a of the box body 1, which can prevent water and dust from entering the box body 1 from the load wiring opening 103a of the box body 1, improving the protection performance of the box body 1.

[0161] In another exemplary embodiment, as Figure 18 , 19 shown, all the wiring terminals 3 extend out of the box body 1 through the wiring opening 10a. In this embodiment, the multiple wiring terminals 3 include an electric auxiliary heating wiring terminal 33, a weak current wiring terminal 34, a power supply 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 box body 1 through the load wiring opening 103a, the weak current wiring terminal 34 extends out of the box body 1 through the weak current wiring opening 104a, the power supply line terminal 31 extends out of the box body 1 through the power supply wiring opening 101a, the communication line terminal 32 extends out of the box body 1 through the communication wiring opening 102a, and the fan wiring terminal 35 extends out of the box body 1 through the fan wiring opening 105a.

[0162] Since all the terminal blocks 3 extend out of the box body 1 through the wiring openings 10a, the terminal blocks 3 occupy little internal space of the box body 1, which can reduce the volume occupied by the box body 1, increase the flow area of the air duct of the air conditioner indoor unit, reduce the resistance of the air in the air duct, and thus increase the air volume of the air conditioner indoor unit.

[0163] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0164] In addition, the terms "first", "second", etc. are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include at least one of such features.

[0165] In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0166] In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0167] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0168] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0169] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A fan drive module for an air conditioner, characterized in that: include: A fan driving plate is used to drive the fan to operate; A radiator abutting against the fan driving plate; as well as, The insulating shell and the heat sink enclose a cavity for accommodating the fan driving plate.

2. The fan drive module according to claim 1, characterized in that: The insulating shell includes a protective shell and an insulating member connected to the protective shell; The insulating member is arranged at the bottom end of the radiator; The protective shell is provided with an inner cavity for accommodating the fan driving plate and a first opening arranged on one side of the inner cavity, and the heat sink and the insulating member jointly cover the first opening of the protective shell.

3. The fan drive module according to claim 2, characterized in that: The insulating member is provided with a plurality of contoured openings; The fan driving plate comprises a base plate, on which a plurality of first connecting pins are arranged, and the plurality of first connecting pins extend out of the cavity through a plurality of contoured openings respectively.

4. The fan drive module according to claim 3, characterized in that: The contoured opening is configured as a groove formed by a side depression on the insulating member that abuts against the protective shell.

5. The fan driving module according to claim 2, characterized in that: The heat sink comprises a heat dissipation plate covering the first opening and a plurality of first fins; The plurality of first fins are arranged on a plate surface of the heat dissipation plate facing away from the protective shell.

6. The fan drive module according to claim 5, characterized in that: The insulating member includes a main body portion disposed at the bottom end of the heat dissipation plate and a plurality of second fins disposed on a side of the main body portion facing away from the protective shell; Wherein, the first fin and the second fin are parallel to each other.

7. The fan driving module according to claim 6, characterized in that: The heat sink further comprises a support connected to the first fin or the heat sink; The insulating member is provided with a clearance opening which penetrates the insulating member, and the support is passed through the clearance opening.

8. The fan driving module according to claim 7, characterized in that: The support is arranged to be connected to the first fin; The clearance opening is a groove formed by the side of the second fin facing away from the main body.

9. The fan driving module according to claim 3, characterized in that: The radiator further comprises a heat dissipation plate covering the first opening and a boss arranged on a side of the heat dissipation plate facing the fan driving plate; The fan driving board further includes a fan driving circuit, and the fan driving circuit includes a power semiconductor module arranged on the substrate, and the power semiconductor module abuts against the boss.

10. The fan driving module according to claim 9, characterized in that: The boss extends from one side of the substrate to the other side of the substrate; A positioning groove is also provided at one end of the side wall of the protective shell close to the base plate, and the boss extends into the positioning groove.

11. The fan driving module according to claim 3, characterized in that: The protective shell includes a cylindrical first side plate, a back plate covering one end of the first side plate, and a plurality of support platforms arranged on a side of the back plate close to the first side plate, wherein the back plate and the first side plate enclose the inner cavity; Wherein, the support platform abuts against the plate surface of the base plate which faces away from the radiator.

12. The fan driving module according to claim 11, characterized in that: The heat sink is provided with a screw hole, the substrate is provided with a first through hole coaxial with the screw hole, and the support platform is provided with a second through hole coaxial with the screw hole; The fan driving module further includes a screw which passes through the second through hole and the first through hole in sequence and is screwed into the screw hole.

13. An electric control box for an indoor unit of an air conditioner, characterized in that: It includes an electric control board and a box body for accommodating the electric control board; The electric control board comprises a fan drive module as claimed in any one of claims 1 to 12; The box body is provided with a heat dissipation opening, the fan driving module is arranged in the box body and the radiator covers the heat dissipation opening.

14. The electric control box according to claim 13, characterized in that: The electric control board also includes a power supply board disposed in the box body, and the power supply board is configured to convert industrial frequency alternating current into direct current to supply power to the fan drive board; The power board is provided with a first docking hole, and the first docking hole is used for inserting a first connecting pin.

15. The electric control box according to claim 14, characterized in that: The electric control panel also includes a control panel; The fan drive module and the control board are both connected to the power board and are located on the same side of the power board. The power board is also configured to convert industrial frequency AC power into DC power to power the control board, which is a logic control unit of the air conditioner indoor unit.

16. The electric control box according to claim 15, characterized in that: The power board is arranged at the bottom of the box body, and the control board and the fan drive board are both arranged on one side of the power board close to the top of the box body; The control board is fixedly connected to the power board and is perpendicular to the power board, and the fan driving board is fixedly connected to the power board and is perpendicular to the power board.

17. An air conditioner indoor unit, characterized in that: Comprising an electric control box as claimed in any one of claims 13 to 16.

18. An air conditioner, characterized in that: Comprising the air conditioner indoor unit as described in claim 17.

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