Electric control box assembly and air conditioner outdoor unit with same

Abstract

The utility model discloses an electric control box assembly and an air conditioner outdoor unit with the electric control box assembly, the electric control box assembly comprises a box body, the box body defines a containing cavity, and an air inlet and an air outlet are formed in the box body; the PCB is arranged in the containing cavity, the PCB is matched with the inner wall of the containing cavity to define a first air duct and a second air duct which are located on the two sides of the PCB in the thickness direction respectively, and the first air duct and the second air duct are both communicated with the air inlet and the air outlet; and the fan is arranged on the box body, and the fan is suitable for driving airflow to flow to the air outlet from the air inlet through the first air duct and the second air duct. According to the electric control box assembly provided by the utility model, the first air duct and the second air duct are respectively arranged at the two sides of the PCB, so that the heat exchange area of airflow and the PCB can be increased, and the size of the electric control box assembly can be reduced on the premise that the cooling efficiency meets the use requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to an electric control box component and an air-conditioner outdoor unit having the same. Background Art

[0002] The electronic control box is an important component in the air-conditioning outdoor unit. During the operation of the air-conditioning outdoor unit, a large amount of heat will be generated in the air-conditioning outdoor unit and the electronic control box. Therefore, the electronic control box needs to be cooled. Air cooling is currently the most commonly used method for cooling the electronic control box. In related technologies, the size of the air-cooled electronic control box is large, which is not convenient for the arrangement of the electronic control box in the air-conditioning outdoor unit. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides an electric control box assembly that can reduce the size of the electric control box assembly while ensuring that the cooling efficiency meets the use requirements.

[0004] The utility model also provides an air-conditioning outdoor unit having the electric control box assembly.

[0005] According to the first aspect of the present utility model, the electric control box assembly includes: a box body, a accommodating cavity is defined inside the box body, and an air inlet and an air outlet are formed on the box body; a PCB board, the PCB board is arranged in the accommodating cavity, and the PCB board cooperates with the inner wall of the accommodating cavity to define a first air duct and a second air duct respectively located on both sides of the thickness direction of the PCB board, and the first air duct and the second air duct are both connected to the air inlet and the air outlet; the fan, the fan is arranged on the box body, and the fan is suitable for driving the airflow from the air inlet to the air outlet through the first air duct and the second air duct.

[0006] According to the electric control box assembly of the first aspect of the present invention, by respectively arranging the first air duct and the second air duct on both sides of the PCB board, the heat exchange area between the airflow and the PCB board can be increased, and the size of the electric control box assembly can be reduced while ensuring that the cooling efficiency meets the use requirements.

[0007] According to some embodiments of the present invention, the number of the air inlets is two and they are respectively the first air inlet and the second air inlet, the first air inlet is connected to the first air duct, and the second air inlet is connected to the second air duct, and the first air inlet and the second air inlet are respectively arranged on both sides of the PCB board in the thickness direction.

[0008] According to some embodiments of the present invention, the air flow direction of the first air inlet is perpendicular to the thickness direction of the PCB board, and in the thickness direction of the PCB board, an air guide groove is formed on the side edge of the first air inlet facing away from the PCB board, which is recessed in the direction away from the PCB board.

[0009] According to some embodiments of the present invention, the air inlet and the air outlet are respectively arranged at both ends of the box body in a first direction, the first direction is perpendicular to the thickness direction of the PCB board, and the fan is arranged at the air outlet.

[0010] According to some embodiments of the present invention, a capacitor and a heat sink are provided on the PCB board, the capacitor and the heat sink are located in the second air duct, and the heat sink is located downstream of the capacitor in the air flow direction.

[0011] According to some embodiments of the present invention, the box body includes a first shell and a second shell, and the first shell and the second shell are both open on one side. The first shell and the second shell are docked and cooperate with each other in the thickness direction of the PCB board to define the accommodating cavity, and the first shell and the second shell are detachably connected.

[0012] According to some embodiments of the present invention, a U-shaped hole with one side open is formed at one end of the first shell and the second shell, and the two U-shaped holes cooperate to define the air outlet.

[0013] According to the second aspect of the present invention, the air conditioner outdoor unit comprises: a shell defining an installation cavity; and the electric control box assembly according to the first aspect of the present invention, wherein the electric control box assembly is arranged in the installation cavity.

[0014] According to the air-conditioning outdoor unit of the second aspect of the present invention, the design difficulty of the air-conditioning outdoor unit can be reduced by providing the electric control box assembly according to the first aspect of the present invention.

[0015] According to some embodiments of the present invention, the air conditioner outdoor unit further includes: a support bracket, the support bracket is fixed on the bottom wall of the installation cavity, and the electric control box assembly is fixed and supported on the upper side of the support bracket.

[0016] According to some embodiments of the present invention, part of the bottom wall of the shell is recessed upward to form an air intake channel, and air intake holes are formed on the side walls of the air intake channel. The first air duct and the second air duct extend up and down, and the air inlet is arranged at the lower end of the box body.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of an air-conditioning outdoor unit according to an embodiment of the present utility model;

[0019] Figure 2 yes Figure 1 A cross-sectional view in the AA direction shown in FIG;

[0020] Figure 3 is a schematic diagram of an electric control box assembly according to an embodiment of the present utility model;

[0021] Figure 4 yes Figure 3 The exploded view of the electric control box assembly shown in FIG does not include the fan;

[0022] Figure 5 yes Figure 3 An exploded view of the electric control box assembly from another angle shown in FIG.

[0023] Figure 6 yes Figure 5 Schematic diagram of the first shell shown in .

[0024] Reference numerals:

[0025] 1000, air conditioner outdoor unit;

[0026] 100. Electric control box assembly;

[0027] 10. Box body; 11. Accommodation chamber; 12. Air inlet; 12a. First air inlet; 12b. Second air inlet; 121. Air guide slot; 13. Air outlet; 131. First slot; 14. First shell; 15. Second shell; 16. Wire outlet; 17. Second slot; 18. Sliding mounting plate; 181. Sliding buckle;

[0028] 20. PCB board; 21. Capacitor; 22. Heat sink;

[0029] 30. First air duct;

[0030] 40. Second air duct;

[0031] 50. Fan;

[0032] 200, housing; 210, mounting cavity; 220, support bracket; 230, air inlet passage; 240, air inlet hole. DETAILED DESCRIPTION

[0033] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0034] Reference below Figures 1-6 The electric control box assembly 100 according to the first embodiment of the present invention is described.

[0035] like Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, the electric control box assembly 100 according to the first embodiment of the present utility model includes: a box body 10, a PCB board 20 and a fan 50.

[0036] Specifically, a accommodating cavity 11 is defined in the box body 10, and an air inlet 12 and an air outlet 13 are formed on the box body 10. The PCB board 20 is arranged in the accommodating cavity 11. The PCB board 20 cooperates with the inner wall of the accommodating cavity 11 to define a first air duct 30 and a second air duct 40 respectively located on both sides of the thickness direction of the PCB board 20. The first air duct 30 and the second air duct 40 are both connected to the air inlet 12 and the air outlet 13. The fan 50 is arranged on the box body 10, and the fan 50 is suitable for driving the air flow from the air inlet 12 through the first air duct 30 and the second air duct 40 to flow to the air outlet 13.

[0037] During the operation of the electric control box assembly 100, the fan 50 works and drives the air flow from the air inlet 12 through the first air duct 30 and the second air duct 40 to the air outlet 13. During the air flow flowing through the first air duct 30 and the second air duct 40, heat is exchanged with the PCB board 20 and other components of the electric control box assembly 100 on both sides of the PCB board 20, thereby achieving cooling of the electric control box assembly 100.

[0038] Among them, by arranging the fan 50 on the box body 10, the fan 50 can drive the airflow to flow in the first air duct 30 and the second air duct 40. The fan 50 is integrated on the electrical control box assembly 100. During the product design process of the air-conditioning outdoor unit 1000, there is no need to design the airflow driving components of the first air duct 30 and the second air duct 40 in the air-conditioning outdoor unit 1000, which can reduce the design difficulty of the air-conditioning outdoor unit 1000.

[0039] By providing the first air duct 30 and the second air duct 40, the air flow can be distributed more evenly in the box body 10 during the process of the air flow flowing into and out of the box body 10, and the degree of contact between the components in the box body 10 and the air flow can be improved, thereby improving the heat exchange efficiency of the electric control box assembly 100.

[0040] As those skilled in the art will appreciate, in the electrical control box assembly 100, the PCB board 20 contains numerous circuits, generating a high level of heat and requiring a high level of cooling. By providing the first air duct 30 and the second air duct 40 on either side of the PCB board 20 in the thickness direction, airflow can remove heat from the PCB board 20 on both sides of the PCB board 20 in the thickness direction, thereby improving the cooling efficiency of the PCB board 20 and, by extension, the electrical control box assembly 100.

[0041] At the same time, it can be understood that in order to ensure that the cooling efficiency of the electronic control box assembly 100 meets the use requirements, the heat exchange efficiency between the airflow and the components in the box body 10 needs to reach a certain threshold. In conventional technology, the air duct is only set on one side of the thickness direction of the PCB board 20, and the airflow only exchanges heat on one side of the thickness direction of the PCB board 20. In order to make the heat exchange efficiency between the airflow and the components in the box body 10 meet the requirements, the heat exchange air volume needs to be larger, so that the size of the air duct is larger. In this way, the size of the electronic control box assembly 100 is larger.

[0042] In this embodiment, the first air duct 30 and the second air duct 40 are provided on both sides of the PCB board 20 in the thickness direction. This doubles the heat exchange area between the airflow and the PCB board 20. While ensuring that the heat exchange efficiency between the airflow and the components within the box body 10 meets the required requirements, the dimensions of the first air duct 30 and the second air duct 40 can be made smaller, thereby reducing the size of the electric control box assembly 100. This reduces the design difficulty of the air conditioner outdoor unit 1000, and allows the electric control box assembly 100 to be adapted to smaller air conditioner outdoor units 1000, such as water-cooled air conditioner outdoor units 1000 that do not have conventional cooling fans.

[0043] According to the electric control box assembly 100 of the first embodiment of the present invention, by respectively arranging the first air duct 30 and the second air duct 40 on both sides of the PCB board 20, the heat exchange area between the airflow and the PCB board 20 can be increased, and the size of the electric control box assembly 100 can be reduced while ensuring that the cooling efficiency meets the usage requirements.

[0044] In some embodiments of the present invention, Figure 2-Figure 4 As shown, there are two air inlets 12, namely the first air inlet 12a and the second air inlet 12b. The first air inlet 12a is connected to the first air duct 30, and the second air inlet 12b is connected to the second air duct 40. The first air inlet 12a and the second air inlet 12b are respectively arranged on both sides of the PCB board 20 in the thickness direction.

[0045] During the operation of the electric control box assembly 100, the air flows into the first air duct 30 from the first air inlet 12a and into the second air duct 40 from the second air inlet 12b. Then, the air in the first air duct 30 and the air in the second air duct 40 exchange heat with the PCB board 20 and other components in the box body 10 and then flows out from the air outlet 13, thereby completing the cooling process of the electric control box assembly 100.

[0046] Among them, by setting independent air inlets 12 through the first air duct 30 and the second air duct 40, the air intake efficiency in the cooling process can be improved, thereby improving the cooling effect of the electrical control box assembly 100. By respectively arranging the first air inlet 12a and the second air inlet 12b on both sides of the PCB board 20 in the thickness direction, at the same time, the first air duct 30 and the second air duct 40 are also arranged on both sides of the PCB board 20 in the thickness direction, the difficulty of arranging the first air inlet 12a and the second air inlet 12b can be reduced, and the path of the air flow inflow can be simplified, making the air flow inflow smoother, further improving the cooling effect of the electrical control box assembly 100.

[0047] In some embodiments of the present invention, Figure 2 、 Figure 4 and Figure 6 As shown, the air flow direction of the first air inlet 12a is perpendicular to the thickness direction of the PCB board 20. In the thickness direction of the PCB board 20, an air guide groove 121 is formed on the side edge of the first air inlet 12a facing away from the PCB board 20, which is concave toward the direction away from the PCB board 20.

[0048] In this way, the air intake size of the first air inlet 12a can be increased, thereby improving the air intake efficiency of the first air duct 30, improving the cooling efficiency of the airflow in the first air duct 30, and further improving the cooling efficiency of the electrical control box assembly 100. During the product design process, the size of the air guide groove 121 can be adjusted so that the air intake efficiency of the first air inlet 12a meets the usage needs.

[0049] In some embodiments of the present invention, Figure 2 As shown, the air inlet 12 and the air outlet 13 are respectively arranged at both ends of the box body 10 in a first direction, the first direction is perpendicular to the thickness direction of the PCB board 20, and the fan 50 is arranged at the air outlet 13.

[0050] During the operation of the electrical control box assembly 100, the fan 50 operates at the air outlet 13 to generate negative pressure, and the negative pressure is transmitted to the air inlet 12 through the first air duct 30 and the second air duct 40. Under the action of the negative pressure, the air flow enters the first air duct 30 and the second air duct 40 from the air inlet 12, and then is discharged from the air outlet 13 through the first air duct 30 and the second air duct 40. In this way, the fan 50 drives the air flow from the air inlet 12 through the first air duct 30 and the second air duct 40 to the air outlet 13.

[0051] Among them, by setting the fan 50 at the air outlet 13, the outflow efficiency of the air flow can be guaranteed. By setting the air inlet 12 and the air outlet 13 at the two ends of the box body 10 in the first direction respectively, the contact area between the air flow and the PCB board 20 can be increased, thereby further improving the cooling efficiency of the electrical control box assembly 100.

[0052] In some embodiments of the present invention, Figure 2 、 Figure 4 and Figure 5 As shown, a capacitor 21 and a heat sink 22 are provided on the PCB board 20 . The capacitor 21 and the heat sink 22 are located in the second air duct 40 , and the heat sink 22 is located downstream of the capacitor 21 in the air flow direction.

[0053] During the operation of the electric control box assembly 100, the airflow entering the second air duct 40 from the second air inlet 12b first blows through the capacitor 21, then blows through the heat sink 22, and then blows out from the air outlet 13. It can be understood that the temperature of the capacitor 21 is relatively low, and the temperature of the airflow is also relatively low when blowing through the capacitor 21. In this way, the heat exchange effect between the airflow and the capacitor 21 can be guaranteed. The temperature of the airflow will rise after blowing through the capacitor 21. At the same time, the temperature of the heat sink 22 is relatively high, and the heat sink 22 and the airflow can maintain a certain temperature difference, thereby ensuring the heat dissipation effect of the heat sink 22 and the airflow. In this way, the heat exchange process of the airflow can be optimized and the cooling efficiency of the electric control box assembly 100 can be improved.

[0054] Preferably, the second air inlet 12b includes a plurality of air inlet holes, so that the air intake efficiency of the second air inlet 12b can be improved, and the air flow distribution in the second air duct 40 can be made more uniform, thereby further improving the cooling efficiency of the electric control box assembly 100.

[0055] In some embodiments of the present invention, Figure 3-Figure 5 As shown, the box body 10 includes a first shell 14 and a second shell 15. The first shell 14 and the second shell 15 are both open on one side. The first shell 14 and the second shell 15 are docked with each other in the thickness direction of the PCB board 20 and cooperate to define the accommodating cavity 11. The first shell 14 and the second shell 15 are detachably connected.

[0056] During the production process, the PCB board 20 is first assembled into the first shell 14 or the second shell 15, and then the first shell 14 and the second shell 15 are buckled together. In this way, the operation is relatively simple and the difficulty of operation can be reduced. Among them, the first shell 14 and the second shell 15 are detachably connected. When the electric control box assembly 100 needs to be inspected, the first shell 14 and the second shell 15 can be opened, thereby facilitating the inspection of the electric control box assembly 100.

[0057] Preferably, the first air inlet 12a is formed on the first shell 14, the second air inlet 12b is formed on the second shell 15, and the PCB board 20 is fixed to the first shell 14 by a snap connection.

[0058] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, a U-shaped hole with one side open is formed at one end of the first shell 14 and the second shell 15 , and the two U-shaped holes cooperate to define the air outlet 13 .

[0059] In this way, the U-shaped hole in the first shell 14 and the second shell 15 does not cause excessive damage to the structure of the first shell 14 and the second shell 15, thereby making it easier to ensure that the structural strength of the first shell 14 and the second shell 15 meets the requirements of use. The air outlet 13 is provided with a first slot 131, and the fan 50 is fixed in the first slot 131.

[0060] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, a wire outlet hole 16 and a second slot 17 are formed on the box body 10. The terminal block is fixed in the second slot 17. The circuit in the box body 10 passes through the wire outlet hole 16 and is connected to the terminal block. The terminal block is used for electrical connection between the electric control box assembly 100 and other components.

[0061] Reference below Figures 1-6 An air-conditioning outdoor unit 1000 according to an embodiment of the second aspect of the present invention will be described.

[0062] like Figure 1 and Figure 2 As shown, the air-conditioning outdoor unit 1000 according to the embodiment of the second aspect of the present invention includes: a housing 200 and the electric control box assembly 100 according to the embodiment of the first aspect of the present invention.

[0063] Specifically, a mounting cavity 210 is defined in the housing 200 , and the electric control box assembly 100 is disposed in the mounting cavity 210 .

[0064] Among them, the electric control box assembly 100 is relatively small in size. In this way, during the design process of the air-conditioning outdoor unit 1000, it is easier to arrange the electric control box assembly 100 in the shell 200, reducing the design difficulty of the air-conditioning outdoor unit 1000. In some small-sized air-conditioning outdoor units 1000, it is easier to adapt the electric control box assembly 100. For example, in the water-cooled air-conditioning outdoor unit 1000 in the kitchen, the water-cooled air-conditioning outdoor unit 1000 is not equipped with a cooling fan, and the size of the air-conditioning outdoor unit 1000 is relatively small. The above-mentioned electric control box assembly 100 according to the embodiment of the first aspect of the present invention is easier to adapt to the water-cooled air-conditioning outdoor unit 1000.

[0065] According to the air-conditioning outdoor unit 1000 of the second embodiment of the present invention, the design difficulty of the air-conditioning outdoor unit 1000 can be reduced by providing the electric control box assembly 100 according to the first embodiment of the present invention.

[0066] In some embodiments of the present invention, Figure 2 As shown, the air conditioner outdoor unit 1000 further includes a support bracket 220 , which is fixed to the bottom wall of the installation cavity 210 , and the electric control box assembly 100 is fixed and supported on the upper side of the support bracket 220 .

[0067] It is understandable that the air-conditioning outdoor unit 1000 will inevitably encounter rain and snow in the outdoor environment. By supporting the electric control box assembly 100 on the bottom wall of the installation cavity 210 through the support bracket 220, the electric control box assembly 100 can be separated from the bottom wall of the installation cavity 210, thereby reducing the probability of rain and snow invading the electric control box assembly 100 and improving the reliability of the air-conditioning outdoor unit 1000 during operation.

[0068] In some embodiments of the present invention, Figure 2 As shown, part of the bottom wall of the shell 200 is recessed upward to form an air inlet channel 230 , and an air inlet hole 240 is formed on the side wall of the air inlet channel 230 . The first air duct 30 and the second air duct 40 extend up and down, and the air inlet 12 is arranged at the lower end of the box body 10 .

[0069] During operation of the air conditioning outdoor unit 1000, external air flows through the air inlet channel 230 and the air inlet hole 240 into the mounting cavity 210. The air then flows from the mounting cavity 210 through the first air inlet 12a and the second air inlet 12b into the first air duct 30 and the second air duct 40. In the first air duct 30 and the second air duct 40, the air exchanges heat with the PCB board 20 and components within the electric control box assembly 100. The air then flows out of the box body 10 through the air outlet 13 and out of the mounting cavity 210, thereby completing the cooling process of the electric control box assembly 100. Preferably, an air outlet is formed on the side wall of the air conditioning outdoor unit 1000, and the air within the mounting cavity 210 flows out through the air outlet.

[0070] Among them, by setting up the air intake channel 230, flow space can be provided for the air flow to enter the installation cavity 210, thereby ensuring the flow efficiency of the air flow entering the installation cavity 210. By setting the air inlet 12 on the lower side of the box, the probability of water in the external environment being sucked in during the air flow inflow can be reduced, thereby further improving the reliability of the air conditioner outdoor unit 1000 during operation.

[0071] In some embodiments of the present invention, Figure 3As shown, the air conditioner outdoor unit 1000 further includes a sliding mounting plate 18 , on which a sliding groove is formed. The sliding mounting plate 18 is fixed in the mounting cavity 210 , and one end of the electric control box assembly 100 is fixed in the sliding groove.

[0072] During the assembly process, the sliding mounting plate 18 is first fixed to the inner wall of the mounting cavity 210 by screws, and then one end of the electric control box assembly 100 is gradually extended into the slide groove, wherein a slide buckle 181 is provided on the box body 10, and one side of the slide groove abuts between the slide buckle 181 and the surface of the box body 10. In this way, the assembly process of the electric control box assembly 100 can be simplified, thereby reducing the assembly difficulty.

[0073] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 understood as a limitation to the present invention.

[0074] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0075] In this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. 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 can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0077] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An electric control box assembly, characterized in that: include: A box body, wherein a receiving cavity is defined in the box body and an air inlet and an air outlet are formed on the box body; a PCB board disposed in the accommodating cavity, wherein the PCB board cooperates with an inner wall of the accommodating cavity to define a first air duct and a second air duct respectively located on both sides of the PCB board in a thickness direction, wherein the first air duct and the second air duct are both connected to the air inlet and the air outlet; A fan is provided on the box body, and is suitable for driving air flow from the air inlet to the air outlet through the first air duct and the second air duct.

2. The electric control box assembly according to claim 1, characterized in that: There are two air inlets, namely the first air inlet and the second air inlet. The first air inlet is connected to the first air duct, and the second air inlet is connected to the second air duct. The first air inlet and the second air inlet are respectively arranged on both sides of the PCB board in the thickness direction.

3. The electric control box assembly according to claim 2, characterized in that: The airflow direction of the first air inlet is perpendicular to the thickness direction of the PCB board. In the thickness direction of the PCB board, an air guide groove is formed on the side edge of the first air inlet facing away from the PCB board. The air guide groove is recessed in the direction away from the PCB board.

4. The electric control box assembly according to claim 1, characterized in that: The air inlet and the air outlet are respectively arranged at two ends of the box body in a first direction, the first direction is perpendicular to the thickness direction of the PCB board, and the fan is arranged at the air outlet.

5. The electric control box assembly according to claim 1, characterized in that: A capacitor and a heat sink are provided on the PCB board. The capacitor and the heat sink are located in the second air duct, and the heat sink is located downstream of the capacitor in the air flow direction.

6. The electric control box assembly according to any one of claims 1 to 5, characterized in that: The box body includes a first shell and a second shell, one side of the first shell and the second shell are both open, the first shell and the second shell are docked and cooperated with each other in the thickness direction of the PCB board to define the accommodating cavity, and the first shell and the second shell are detachably connected.

7. The electric control box assembly according to claim 6, characterized in that: A U-shaped hole with one side open is formed at one end of each of the first shell and the second shell, and the two U-shaped holes cooperate to define the air outlet.

8. An air conditioner outdoor unit, characterized in that: include: a housing, wherein a mounting cavity is defined within the housing; The electric control box assembly according to any one of claims 1 to 7 is arranged in the installation cavity.

9. The air conditioner outdoor unit according to claim 8, characterized in that: Also includes: A support bracket is fixed on the bottom wall of the installation cavity, and the electric control box assembly is fixed and supported on the upper side of the support bracket.

10. The air conditioner outdoor unit according to claim 9, characterized in that: Part of the bottom wall of the shell is recessed upward to form an air intake channel, and air intake holes are formed on the side walls of the air intake channel. The first air duct and the second air duct extend up and down, and the air inlet is arranged at the lower end of the box body.

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