Air conditioner and electronic control device therefor

Abstract

Disclosed in the present application are an air conditioner and an electronic control device therefor. The electronic control device comprises: a strong-current control board (101), a weak-current control board (102) and a mounting housing, wherein the mounting housing comprises a first housing (103) and a second housing (104), a first mounting cavity is formed within the first housing (103), a second mounting cavity is formed within the second housing (104), and the first housing (103) and the second housing (104) are connected and staggered relative to each other; the strong-current control board (101) is arranged within the first mounting cavity; and the weak-current control board (102) is arranged within the second mounting cavity.

Description

Air conditioner and its electronic control device

[0001] Cross-reference of related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 202510069021.7, filed on January 15, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of air conditioning, and more particularly to an air conditioner and its electronic control device. Background Technology

[0004] With technological advancements and improved living standards, users are increasingly demanding more multifunctional and compact wall-mounted air conditioners. To achieve this miniaturization, the size of the air conditioner's electronic control unit is gradually decreasing. As shown in Figure 1, in related technologies, the electronic control unit is placed in the space between the indoor fan and the fresh air module.

[0005] As air conditioners become more functional, their power consumption increases. To meet the miniaturization requirements of the electronic control device, the power density of the device needs to be increased. However, this increased power consumption leads to several technical problems: heat dissipation of the power components on the control board is difficult, the layout of components on the control board is challenging, the assembly of the control device is complex, and reliability is poor. In other words, the current size and installation space of the electronic control device cannot support the multifunctional needs of air conditioners. Summary of the Invention

[0006] In view of this, the present application provides an air conditioner and its electronic control device, which aims to provide an electronic control device for an air conditioner that meets the needs of multiple functions.

[0007] The technical solution of this application embodiment is implemented as follows:

[0008] In a first aspect, embodiments of this application provide an electronic control device for an air conditioner, the electronic control device comprising: a high-voltage control board, a low-voltage control board, and a mounting housing;

[0009] The mounting housing includes a first housing and a second housing, wherein a first mounting cavity is formed in the first housing and a second mounting cavity is formed in the second housing, and the first housing and the second housing are connected and staggered.

[0010] The high-voltage control board is located inside the first mounting cavity;

[0011] The low-voltage control board is located inside the second mounting cavity.

[0012] In some embodiments, the first housing has a first mounting opening, the first mounting cavity is formed by the first mounting opening extending along a first direction; the first housing includes a bottom wall serving as the bottom surface of the first mounting cavity and a first side wall facing the second housing, the second housing being disposed near the first mounting opening and connected to the first side wall.

[0013] In some embodiments, the first housing further includes a second sidewall connected to the first sidewall, the second sidewall having an insertion slot, the high-voltage control board being inserted into the insertion slot through the first mounting opening along the first direction and fixed to the second sidewall.

[0014] In some embodiments, the second housing is provided with a second mounting opening, and the second mounting cavity is formed by extending the second mounting opening along the first direction; the second housing includes a bottom plate serving as the bottom surface of the second mounting cavity and an obstacle avoidance connecting plate connecting the bottom plate and the first sidewall.

[0015] In some implementations, the first mounting opening is flush with the upper surface of the second mounting opening.

[0016] In some implementations, the depth of the first mounting cavity is greater than the depth of the second mounting cavity, and the low-voltage control board is laid flat inside the second mounting cavity.

[0017] In some implementations, the high-voltage control board and the low-voltage control board are arranged perpendicularly to each other.

[0018] In some embodiments, the second housing is provided with a mounting slot, and the low-voltage control board is fixed in the second mounting cavity based on the mounting slot of the second housing.

[0019] In some embodiments, the first housing further includes a third sidewall disposed opposite to the second sidewall, the third sidewall being connected to the first sidewall, and a fixing groove being provided on the side of the third sidewall near the first mounting opening, the fixing groove being used to fix the high-voltage current-carrying line; the high-voltage current-carrying line is connected to the high-voltage control board after being fixed by the fixing groove, and is used to supply power to the high-voltage control board.

[0020] In some embodiments, the first housing further includes a fourth sidewall disposed opposite to the first sidewall, the fourth sidewall being connected to the second sidewall and the third sidewall respectively, and the fourth sidewall having partial openings; the bottom wall, the first sidewall and the third sidewall having partial window openings.

[0021] In some implementations, the high-voltage control board is used to control the indoor fan of the air conditioner and to convert the input power of the air conditioner to supply power to the low-voltage control board; the low-voltage control board is used to control the low-voltage load of the air conditioner; the high-voltage control board is connected to the low-voltage control board via low-voltage current-carrying lines and inter-board communication lines.

[0022] Secondly, embodiments of this application provide an air conditioner, which includes an indoor fan, a fresh air module, and an electronic control device as described in the first aspect, wherein the electronic control device is disposed between the indoor fan and the fresh air module.

[0023] In some implementations, the first housing is disposed between the internal fan and the fresh air module; the second housing is disposed outside the fresh air module.

[0024] The electrical control device provided in this application includes: a high-voltage control board, a low-voltage control board, and a mounting housing; wherein, the mounting housing includes a first housing and a second housing, a first mounting cavity is formed within the first housing, and a second mounting cavity is formed within the second housing, the first housing and the second housing are connected and staggered; the high-voltage control board is disposed within the first mounting cavity; the low-voltage control board is disposed within the second mounting cavity. Thus, this application embodiment divides the air conditioner's electrical control board into a high-voltage control board and a low-voltage control board according to the power supply system and function. The two control boards are staggered in space, making full use of the air conditioner's layout space and solving the problem that the increased size of the control board after adding functions cannot be placed in the original mounting position, reducing design modifications to the air conditioner. Attached Figure Description

[0025] Figure 1 is a structural schematic diagram of a wall-mounted air conditioner in the relevant technology;

[0026] Figure 2 is a schematic diagram of the structure of the electronic control device of the air conditioner according to an embodiment of this application;

[0027] Figure 3 is a schematic diagram of the structure of the mounting housing according to an embodiment of this application;

[0028] Figure 4 is a schematic diagram showing the arrangement of the high-voltage control board and the low-voltage control board in an application example of this application;

[0029] Figure 5 is a schematic diagram showing the arrangement of the high-voltage control board and the low-voltage control board in another application example of this application;

[0030] Figure 6 is a structural schematic diagram of the air conditioner according to an embodiment of this application;

[0031] Figure 7 is a schematic diagram of the structure of the housing in another embodiment of this application.

[0032] Explanation of reference numerals in the attached drawings: 100, Electrical control device; 101, High-voltage control board; 102, Low-voltage control board; 103, First housing; 1031, First side wall; 1032, Second side wall; 1033, Third side wall; 1034, Fourth side wall; 1035, Bottom wall; 1036, Fixing groove; 1037, Insertion groove; 1038, First mounting opening; 104, Second housing; 1041, Base plate; 1042, Obstacle avoidance connecting plate; 1043, Mounting slot; 1044, Second mounting opening; 200, Internal fan; 300, Fresh air module. Detailed Implementation

[0033] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0035] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0036] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] Before providing a detailed description of the electronic control device of the air conditioner in the embodiments of this application, the structure of the air conditioner in the related art will be described first to further demonstrate the technical effects achieved by the embodiments of this application.

[0039] Here, the air conditioner in this embodiment of the application is used to regulate the temperature, humidity, etc. of the environment. Specifically, the air conditioner is a wall-mounted air conditioner.

[0040] In related technologies, the internal structure of a wall-mounted air conditioner is shown in Figure 1. The air conditioner includes an electronic control device, an indoor fan 200, and a fresh air module 300. The electronic control device includes a mounting housing and an electronic control board. The electronic control board (not shown in the figure) is located inside the mounting housing. The electronic control board is used to convert the input power of the air conditioner and supply it to the air conditioner, as well as to control the operation of loads such as the indoor fan 200 and the fresh air module 300.

[0041] Here, in order to reduce the installation space required for wall-mounted air conditioners, the internal structure of wall-mounted air conditioners is compact. Since the control board needs to control the operation of the indoor fan 200 and the fresh air module 300, the control device is usually set in the empty space between the indoor fan 200 and the fresh air module 300.

[0042] However, with technological advancements and improved living standards, wall-mounted air conditioners are becoming increasingly versatile. As their functions increase, so does their power consumption. To meet the miniaturization requirements of both the air conditioner and its control unit, the power density of the control unit needs to be increased. However, this increased power density can lead to problems such as poor heat dissipation, complex layout, complicated assembly, and low reliability of the control board. In other words, the original installation space available for the control unit in wall-mounted air conditioners is insufficient to support the multifunctional needs of the air conditioner. Increasing the size of the control board would require modifications to the overall structure of the wall-mounted air conditioner, which is not feasible.

[0043] Based on this, embodiments of this application provide an electronic control device for an air conditioner that meets multifunctional requirements.

[0044] For example, as shown in FIG2, the electrical control device includes: a high-voltage control board 101, a low-voltage control board 102, and a mounting housing. The mounting housing includes a first housing 103 and a second housing 104. A first mounting cavity is formed within the first housing 103, and a second mounting cavity is formed within the second housing 104. The first housing 103 and the second housing 104 are connected and staggered. The high-voltage control board 101 is disposed within the first mounting cavity; the low-voltage control board 102 is disposed within the second mounting cavity.

[0045] It should be noted that, in this embodiment of the application, the electronic control board is designed as a separate board based on the function and power supply system of the electronic control board. The separate electronic control board includes a high-voltage control board 101 and a low-voltage control board 102, which are arranged separately and alternately.

[0046] For example, the high-voltage control board 101 is used to control the indoor fan of the air conditioner and to convert the input power of the air conditioner to supply power to the low-voltage control board 102; the low-voltage control board 102 is used to control the low-voltage load of the air conditioner; the high-voltage control board 101 is connected to the low-voltage control board 102 via low-voltage current-carrying lines and inter-board communication lines.

[0047] In some embodiments, the devices arranged on the substrate of the high-voltage control board 101 include, but are not limited to: an internal fan drive circuit, a switching power supply module, and a current loop communication circuit. The devices arranged on the substrate of the low-voltage control board 102 include, but are not limited to: a stepper motor drive circuit, a controller, a fresh air module drive circuit, a temperature sensor circuit, and a sterilization module drive circuit.

[0048] Here, the air conditioner also includes a high-voltage current-carrying line. The input power of the air conditioner is connected to the high-voltage control board 101 via the high-voltage current-carrying line to supply power to the high-voltage control board 101. The high-voltage control board 101 and the low-voltage control board 102 are connected by a multi-core cable, which includes a low-voltage current-carrying line and an inter-board communication line. The switching power supply module on the high-voltage control board 101 converts the input power into a low-voltage signal and supplies power to the low-voltage control board 102 via the low-voltage current-carrying line. After being powered on, the low-voltage control board 102 controls the operation of each low-voltage load.

[0049] It is understandable that the power control board 101 and the low-voltage control board 102 transmit power and communication signals through multi-core cables. The separate control board can still achieve all the functions of the integrated control board in related technologies.

[0050] It should be noted that the mounting housing in this embodiment includes a first housing 103 and a second housing 104 arranged in a spatially staggered manner. The high-voltage control board 101 is disposed within the first mounting cavity of the first housing 103, and the low-voltage control board 102 is disposed within the second mounting cavity of the second housing 104. The volume of the first housing 103 is determined based on the dimensions of the high-voltage control board 101, and the volume of the second housing 104 is determined based on the dimensions of the low-voltage control board 102. It is readily understood that since the dimensions of the high-voltage control board 101 or the low-voltage control board 102 are smaller than or equal to the dimensions of the original integrated control board, the volume of the first housing 103 or the second housing 104 is smaller than or equal to the volume of the mounting housing in related technologies.

[0051] Here, the first housing 103 is connected to the second housing 104. The first housing 103 and the second housing 104 can be an integral structure, or they can be combined by connectors or glued together. In some embodiments, the first housing 103 and the second housing 104 are made of plastic and are edged with metal material.

[0052] For example, as shown in Figures 2 and 3, the first housing 103 is provided with a first mounting opening 1038, and a first mounting cavity is formed by extending the first mounting opening 1038 along a first direction; the first housing 103 includes a bottom wall 1035 that serves as the bottom surface of the first mounting cavity and a first side wall 1031 facing the second housing 104, and the second housing 104 is disposed near the first mounting opening 1038 and connected to the first side wall 1031.

[0053] For example, the second housing 104 is provided with a second mounting opening 1044, and the second mounting cavity is formed by extending the second mounting opening 1044 along a first direction; the second housing 104 includes a bottom plate 1041 that serves as the bottom surface of the second mounting cavity and an obstacle avoidance connecting plate 1042 that connects the bottom plate 1041 with the first side wall 1031.

[0054] For example, the upper surfaces of the first mounting opening 1038 and the second mounting opening 1044 are flush. The depth of the first mounting cavity is greater than the depth of the second mounting cavity.

[0055] It is understood that the electrical control device in this embodiment combines the structural characteristics of the high-voltage control board 101 and the low-voltage control board 102, and rationally arranges the first housing 103 and the second housing 104 to make full use of the spare space of the air conditioner. Specifically, since the high-voltage control board 101 needs to accommodate large-volume components such as filter capacitors, while the components on the low-voltage control board 102 are smaller, the high-voltage control board 101, which has a larger overall size, is placed in the deeper first mounting cavity; since the volume of the first housing 103 is less than or equal to the volume of the original mounting housing, the spare space between the internal fan 200 and the fresh air module 300 fully meets the installation requirements of the first housing 103.

[0056] It should be noted that if the first housing 103 is placed in the empty space between the internal fan 200 and the fresh air module 300, and the fresh air module is directly below the first housing 103 vertically, in order to place the second housing 104 and the low-voltage control board 102, in this embodiment of the application, the obstacle avoidance connecting plate 1042 of the second housing 104, together with the first side wall 1031 of the first housing 103 and the bottom plate 1041 of the second housing 104, form a stepped portion. When the first housing 103 is placed in the empty space between the internal fan 200 and the fresh air module 300, the obstacle avoidance connecting plate 1042 is abutted against the fresh air module 300, making full use of the other empty space of the wall-mounted air conditioner to place the second housing 104 and the low-voltage control board 102.

[0057] For example, the low-voltage control board 102 is laid flat inside the second mounting cavity.

[0058] It is understandable that, since the second mounting cavity is shallow in the first direction, the second housing 104 makes full use of the vertical space outside the fresh air module 300, so that the weak current control board 102 is laid flat in the second mounting cavity and the second housing 104 is set on the outside of the fresh air module 300.

[0059] For example, the first housing 103 also includes a second sidewall 1032 connected to the first sidewall 1031. The second sidewall 1032 is provided with an insertion groove 1037. The high-voltage control board 101 is inserted into the insertion groove 1037 along the first direction through the first mounting opening 1038 and fixed on the second sidewall 1032.

[0060] For example, the first housing 103 further includes a third sidewall 1033 disposed opposite to the second sidewall 1032. The third sidewall 1033 is connected to the first sidewall 1031. A fixing groove 1036 is provided on the side of the third sidewall 1033 near the first mounting opening 1038. The fixing groove 1036 is used to fix the high-voltage current-carrying line. After being fixed by the fixing groove 1036, the high-voltage current-carrying line is connected to the high-voltage control board 101. The first housing 103 also includes a fourth sidewall 1034 disposed opposite to the first sidewall 1031. The fourth sidewall 1034 is connected to the second sidewall 1032 and the third sidewall 1033 respectively.

[0061] Here, the first sidewall 1031, the second sidewall 1032, the third sidewall 1033, the fourth sidewall 1034 and the bottom wall 1035 of the first housing 103 together form the first mounting cavity.

[0062] Here, considering the outlet position of the wall-mounted air conditioner, a fixing groove 1036 for fixing the high-voltage current-carrying line is provided on the third side wall 1033 of the first housing 103, and the high-voltage control board 101 is fixed on the second side wall 1032 on the opposite side of the third side wall 1033, so as to facilitate the connection of the high-voltage current-carrying line to the high-voltage control board 101.

[0063] It is understandable that the high-voltage current-carrying line is fixed by the fixing slot 1036, and the high-voltage control board 101 is installed by plug-in type, and the installation structure is reliable; the substrate of the high-voltage control board 101 is inserted into the insertion slot 1037 by the first mounting opening 1038, and the space between the second side wall 1032 and the third side wall 1033 can meet the space requirements of the large-size devices arranged on the high-voltage control board 101.

[0064] Here, since the low-voltage control board 102 needs to connect to multiple low-voltage loads of the air conditioner, and considering the assembly process of the air conditioner, for example, the second housing 104 is provided with a mounting slot 1043, and the low-voltage control board 102 is fixed in the second mounting cavity based on the mounting slot 1043 of the second housing 104.

[0065] It is understandable that the low-voltage control board 102 is installed by pressing. When assembling the wall-mounted air conditioner, after the low-voltage control board 102 is installed and fixed in the second housing 104, the cables between each component and the low-voltage control board 102 are connected to facilitate the wiring of the low-voltage control board 102.

[0066] In some embodiments, as shown in FIG3, the bottom plate 1041 of the second housing 104 is slotted to facilitate the routing of multi-core cables between the high-voltage control board 101 and the low-voltage control board 102.

[0067] Here, based on the aforementioned structure of the mounting housing, the high-voltage control board 101 and the low-voltage control board 102 are arranged perpendicularly to each other, forming an "L" shape in space. In one application example of this application, the arrangement relationship between the high-voltage control board 101 and the low-voltage control board 102 is shown in Figures 4 and 5, respectively.

[0068] This application embodiment also provides an air conditioner, as shown in FIG6. The air conditioner includes an indoor fan 200, a fresh air module 300 and the aforementioned electronic control device 100, wherein the electronic control device 100 is disposed between the indoor fan 200 and the fresh air module 300.

[0069] For example, the first housing 103 is disposed between the internal fan 200 and the fresh air module 300; the second housing 104 is disposed on the outside of the fresh air module 300.

[0070] It is understood that the electronic control device 100 in this embodiment is arranged between the indoor fan 200 and the fresh air module 300 as shown in FIG. 6, without modifying the existing structure of the indoor fan 200 and the fresh air module 300. Furthermore, since the electronic control device 100 adopts a split-board design, it increases the number of components on the electronic control board and simplifies the component layout, thereby improving the power density of the electronic control device and enabling the air conditioner to meet the multi-functional needs of users.

[0071] In some embodiments, as shown in FIG7, the fourth sidewall 1034 is partially perforated; the bottom wall 1035, the first sidewall 1031 and the third sidewall 1033 are partially windowed.

[0072] It should be noted that the high-voltage control board 101 is fixed on the second side wall 1032. The side of the first side wall 1031 near the first mounting opening 1038 is used to form a stepped part with the obstacle avoidance connecting plate 1042 and the bottom plate 1041. The side of the third side wall 1033 near the first mounting opening 1038 is used to set the fixing groove 1036 for fixing the high-voltage current-carrying line. Therefore, the side of the first side wall 1031 near the bottom wall 1035 and the side of the third side wall 1033 near the bottom wall 1035 do not need to be used as a load-bearing structure. Therefore, partial openings are made on the side of the first side wall 1031 near the bottom wall 1035 and the side of the third side wall 1033 near the bottom wall 1035, which is beneficial to the heat dissipation of the high-voltage control board 101 and the demolding during the processing.

[0073] Specifically, the fourth sidewall 1034 is partially perforated to facilitate heat dissipation of the high-voltage control board 101, while also preventing the perforation from being too large, which could cause flames to burst out from the fourth sidewall 1034 in the event of a fire in the high-voltage control board 101.

[0074] It should be noted that the mounting housing shown in Figures 3 and 7 is only a specific embodiment of the mounting housing of the electronic control device in this application. This application does not specifically limit the shape and structure of the mounting housing. Any form of mounting housing, as long as it can be equipped with a high-voltage control board and a low-voltage control board, and can be installed on a wall-mounted air conditioner in the installation position shown in Figure 6, is within the protection scope of this application.

[0075] It should be noted that terms such as "first" and "second" are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0076] Furthermore, the technical solutions described in the embodiments of this application can be combined arbitrarily without conflict.

[0077] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electronic control device for an air conditioner, the electronic control device comprising: High-voltage control board, low-voltage control board, and mounting housing; The mounting housing includes a first housing and a second housing, wherein a first mounting cavity is formed in the first housing and a second mounting cavity is formed in the second housing, and the first housing and the second housing are connected and staggered. The high-voltage control board is located inside the first mounting cavity; The low-voltage control board is located inside the second mounting cavity.

2. The electronic control device according to claim 1, wherein, The first housing has a first mounting opening, and the first mounting cavity is formed by extending the first mounting opening along a first direction; the first housing includes a bottom wall that serves as the bottom surface of the first mounting cavity and a first side wall facing the second housing, and the second housing is disposed near the first mounting opening and connected to the first side wall.

3. The electronic control device according to claim 2, wherein, The first housing also includes a second sidewall connected to the first sidewall. The second sidewall is provided with an insertion slot. The high-voltage control board is inserted into the insertion slot through the first mounting opening along the first direction and fixed to the second sidewall.

4. The electronic control device according to claim 2 or 3, wherein, The second housing has a second mounting opening, and the second mounting cavity is formed by extending the second mounting opening along the first direction; the second housing includes a bottom plate serving as the bottom surface of the second mounting cavity and an obstacle avoidance connecting plate connecting the bottom plate and the first side wall.

5. The electronic control device according to claim 4, wherein, The upper surfaces of the first mounting opening and the second mounting opening are flush.

6. The electronic control device according to claim 4 or 5, wherein, The depth of the first mounting cavity is greater than the depth of the second mounting cavity, and the low-voltage control board is laid flat inside the second mounting cavity.

7. The electronic control device according to claim 6, wherein, The high-voltage control board and the low-voltage control board are arranged perpendicularly to each other.

8. The electronic control device according to claim 6 or 7, wherein, The second housing is provided with a mounting slot, and the low-voltage control board is fixed in the second mounting cavity based on the mounting slot of the second housing.

9. The electronic control device according to any one of claims 3 to 8, wherein, The first housing also includes a third sidewall disposed opposite to the second sidewall. The third sidewall is connected to the first sidewall. A fixing groove is provided on the side of the third sidewall near the first mounting opening. The fixing groove is used to fix the high-voltage current-carrying line. After being fixed by the fixing groove, the high-voltage current-carrying line is connected to the high-voltage control board to supply power to the high-voltage control board.

10. The electronic control device according to claim 9, wherein, The first housing also includes a fourth sidewall disposed opposite to the first sidewall, the fourth sidewall being connected to the second sidewall and the third sidewall respectively, and the fourth sidewall having partial openings; the bottom wall, the first sidewall and the third sidewall having partial window openings; The first sidewall, the second sidewall, the third sidewall, the fourth sidewall, and the bottom wall of the first housing together form the first mounting cavity.

11. The electronic control device according to any one of claims 1 to 10, wherein, The high-voltage control board is used to control the indoor fan of the air conditioner and to convert the input power of the air conditioner to supply power to the low-voltage control board; the low-voltage control board is used to control the low-voltage load of the air conditioner; the high-voltage control board is connected to the low-voltage control board via low-voltage current-carrying lines and inter-board communication lines.

12. An air conditioner, the air conditioner comprising an indoor fan, a fresh air module, and an electronic control device as described in any one of claims 1 to 11, wherein, The electrical control device is located between the internal fan and the fresh air module.

13. The air conditioner according to claim 12, wherein, The first housing is disposed between the internal fan and the fresh air module; the second housing is disposed on the outside of the fresh air module.

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