Electric control box heat dissipation structure of top-air-out air conditioner outdoor unit and air conditioner outdoor unit applying electric control box heat dissipation structure

Abstract

The electric control box heat dissipation structure comprises an electric control box back plate, a wind scooper and a cover plate, wherein the electric control box back plate is composed of an upper back plate and a lower back plate; the electric control board is located in a first heat dissipation air channel defined by the cover plate and the electric control box back plate, and at least part of the lower portion of the heat dissipation fin is located in a second heat dissipation air channel defined by the wind scooper and the electric control box back plate; the lower back plate is provided with a first air inlet and a second air inlet, the upper back plate is provided with a first air outlet, the wind scooper is provided with a second air outlet, the first air inlet and the first air outlet are communicated with the first heat dissipation air duct, and the second air inlet and the second air outlet are communicated with the second heat dissipation air duct. The two independent heat dissipation air channels are designed, heat dissipation is conducted on the electric control board and the heat dissipation fins respectively, the phenomenon that airflow is dispersed in a single air channel is effectively avoided, and therefore the heat dissipation efficiency is improved. By improving the heat dissipation structure of the electric control box, the heat dissipation condition of the electric control board is optimized.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioners, in particular to a heat dissipation structure for an electronic control box of a top - air - outlet air conditioner outdoor unit and an air conditioner outdoor unit applying the same. Background Art

[0002] In the hot summer, air conditioners are one of the indispensable household appliances in families. Existing air conditioners generally include an outdoor unit and an indoor unit, and the outdoor unit is connected to the indoor unit through pipelines. At present, when the electronic control board of an air conditioner outdoor unit is working, a large amount of heat will be generated. If the electronic control board has poor heat dissipation, it will, at the least, limit the compressor frequency, affect the refrigeration effect, and lead to a poor user experience; at the worst, it will cause aging and failure accidents of the electronic control board components, affecting the reliability of the air conditioner.

[0003] At present, in order to enhance the heat dissipation effect of the electronic control board, heat dissipation fins are used to dissipate heat from the electronic control board. However, in a top - air - outlet air conditioner outdoor unit, the air flow passing through the heat dissipation fins is easily dispersed under the action of the fan, so that the heat dissipation fins cannot dissipate heat from the electronic control board well, resulting in a poor heat dissipation effect; and when the air conditioner is in the refrigeration operation, the outdoor heat exchanger will generate a large amount of heat, causing the temperature of the air flow passing through the heat dissipation fins to be relatively high, and the heat dissipation effect is also not good. Summary of the Utility Model

[0004] Aiming at the problems raised in the background art, the purpose of the utility model is to provide a heat dissipation structure for an electronic control box of a top - air - outlet air conditioner outdoor unit and an air conditioner outdoor unit applying the same, which solves the problem of poor heat dissipation of the existing top - air - outlet air conditioner outdoor unit.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A heat dissipation structure for an electronic control box of a top - air - outlet air conditioner outdoor unit includes an upper back plate, a lower back plate, a wind guide cover and a cover plate;

[0007] The upper back plate and the lower back plate are arranged up and down to form the back plate of the electronic control box. An electronic control board is arranged on the front side of the back plate of the electronic control box, and heat dissipation fins are arranged on the rear side of the back plate of the electronic control box. The cover plate is arranged on the front side of the back plate of the electronic control box and encloses with the back plate of the electronic control box to form a first heat dissipation air duct. The electronic control board is located in the first heat dissipation air duct. The wind guide cover is arranged on the rear side of the back plate of the electronic control box, and the wind guide cover and the back plate of the electronic control box enclose to form a second heat dissipation air duct. At least part of the lower part of the heat dissipation fins is located in the second heat dissipation air duct;

[0008] A first air inlet and a second air inlet are arranged at the lower part of the lower back plate, a first air outlet is arranged at the upper part of the upper back plate, and a second air outlet is arranged at the upper part of the wind guide cover. The first air inlet and the first air outlet are communicated with the first heat dissipation air duct, and the second air inlet and the second air outlet are communicated with the second heat dissipation air duct.

[0009] Preferably, the lower back plate includes a lower vertical plate and a lower horizontal plate. The lower horizontal plate is disposed at the top end of the lower vertical plate. The lower horizontal plate is perpendicular to the lower vertical plate. The first air inlet is disposed on the lower horizontal plate, and the second air inlet is disposed on the lower vertical plate.

[0010] The upper back plate includes an upper vertical plate and an upper horizontal plate. The upper horizontal plate is disposed at the bottom end of the upper vertical plate. The upper horizontal plate is perpendicular to the upper vertical plate. One end of the upper horizontal plate away from the upper vertical plate is connected to the lower horizontal plate, and the upper horizontal plate and the lower horizontal plate are in the same horizontal plane.

[0011] Preferably, the upper horizontal plate is further provided with ventilation holes, and the ventilation holes are respectively communicated with the first heat dissipation air duct and the second heat dissipation air duct.

[0012] Preferably, the air guide cover is provided with two wire-passing rubber rings and two wire-winding components. The wire-passing rubber rings are disposed on the front side of the air guide cover, and the wire-passing rubber rings extend in a direction close to the back plate of the electric control box. The wire-winding components are disposed on the rear side of the air guide cover, and the wire-winding components extend in a direction away from the back plate of the electric control box.

[0013] Two wire-passing holes are provided in the lower part of the upper back plate. The wire-passing rubber rings are located below the wire-passing holes, and the two wire-passing holes respectively correspond to the two wire-passing rubber rings one by one.

[0014] Preferably, the upper vertical plate is provided with a first notch, and the upper horizontal plate is provided with a second notch. The first notch and the second notch communicate to form the wire-passing hole, and a wire protection ring is provided at the first notch.

[0015] Preferably, the wire protection ring includes an arc portion and two telescopic portions. The two telescopic portions are respectively disposed at both ends of the opening of the arc portion, and the two telescopic portions jointly block the opening of the arc portion.

[0016] One end of the telescopic portion is a fixed end, and the fixed end is fixedly connected to the arc portion. The other end of the telescopic portion is an elastic free end, and the elastic free end can be deformed towards the fixed end, and the two elastic free ends are in contact with each other.

[0017] Preferably, the air guide cover is further provided with an insect-proof board. The insect-proof board is horizontally disposed in the second heat dissipation air duct, and the insect-proof board is located below the heat dissipation fins.

[0018] Preferably, a wind guide plate is provided at the first air outlet. The upper part of the wind guide plate is connected to the rear side of the upper vertical plate, and the lower part of the wind guide plate extends downward.

[0019] Preferably, a water baffle is further provided at the rear side of the upper back plate, and the water baffle is arranged below the first air outlet and above the heat dissipation fins.

[0020] An outdoor unit of an air conditioner includes: a housing, a fan, and the above-mentioned heat dissipation structure for the electronic control box;

[0021] The fan is arranged on the top wall of the housing, the heat dissipation structure of the electronic control box is connected to the housing, the first air inlet and the second air inlet are respectively communicated with the external space, and the first air outlet and the second air outlet are respectively communicated with the internal space of the housing.

[0022] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0023] By designing two independent heat dissipation air ducts (the first heat dissipation air duct and the second heat dissipation air duct) to dissipate heat from the electronic control board and the heat dissipation fins respectively, the dispersion phenomenon of air flow in a single air duct is effectively avoided, thereby improving the heat dissipation efficiency. By improving the heat dissipation structure of the electronic control box, the heat dissipation conditions of the electronic control board are optimized, and the risk of aging and failure of the components of the electronic control board due to high temperature is avoided, thereby improving the reliability and service life of the entire air conditioning system. Description of the Drawings

[0024] Figure 1 is a schematic diagram of an embodiment of the present invention;

[0025] Figure 2 is a structural schematic diagram of an embodiment of the present invention;

[0026] Figure 3 is a schematic diagram of another angle of an embodiment of the present invention;

[0027] Figure 4 is a structural schematic diagram of another angle of an embodiment of the present invention;

[0028] Figure 5 is another structural schematic diagram of an embodiment of the present invention;

[0029] Figure 6 is a schematic diagram of another embodiment of the present invention.

[0030] Wherein: upper back plate 11, upper vertical plate 111, upper horizontal plate 112, ventilation hole 113, wire passing hole 114, air guiding plate 115, water baffle 116, lower back plate 12, lower vertical plate 121, lower horizontal plate 122, air guiding cover 3, wire passing rubber ring 31, wire winding assembly 32, insect-proof plate 33, cover plate 4, electronic control board 5, heat dissipation fins 6, first heat dissipation air duct 7, first air inlet 71, first air outlet 72, arc part 91, telescopic part 92, fan 02 and housing 01. Specific embodiments

[0031] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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 of the present invention.

[0033] In addition, the terms "first", "second" and "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second" and "third" may explicitly or implicitly include one or more of such features.

[0034] It should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0035] The following combines the attached Figures 1 to 6 And further illustrates the technical solution of the present invention through specific embodiments.

[0036] An electronic control box heat dissipation structure for a top-outlet air conditioner outdoor unit, including an upper back plate 11, a lower back plate 12, an air guiding cover 3 and a cover plate 4;

[0037] The upper back plate 11 and the lower back plate 12 are arranged up and down to form the back plate of the electric control box. An electric control board 5 is provided on the front side of the back plate of the electric control box, and heat dissipation fins 6 are provided on the rear side of the back plate of the electric control box. The cover plate 4 is arranged on the front side of the back plate of the electric control box and encloses with the back plate of the electric control box to form a first heat dissipation air duct 7. The electric control board 5 is located in the first heat dissipation air duct 7. The air guide cover 3 is arranged on the rear side of the back plate of the electric control box, and the air guide cover 3 and the back plate of the electric control box enclose to form a second heat dissipation air duct 8. At least a part of the lower part of the heat dissipation fins 6 is located in the second heat dissipation air duct 8;

[0038] A first air inlet 71 and a second air inlet 81 are provided at the lower part of the lower back plate 12, a first air outlet 72 is provided at the upper part of the upper back plate 11, and a second air outlet 82 is provided at the upper part of the air guide cover 3. The first air inlet 71 and the first air outlet 72 are communicated with the first heat dissipation air duct 7, and the second air inlet 81 and the second air outlet 82 are communicated with the second heat dissipation air duct 8.

[0039] The electric control box is composed of the back plate of the electric control box and the cover plate 4. The electric control board 5 is arranged inside the electric control box, and the heat dissipation fins 6 are arranged on the rear side of the back plate of the electric control box, which is equivalent to being arranged on the back of the electric control board 5 to dissipate heat for the electric control board 5. By designing two independent heat dissipation air ducts (the first heat dissipation air duct 7 and the second heat dissipation air duct 8), heat dissipation is carried out for the electric control board 5 and the heat dissipation fins 6 respectively, effectively avoiding the dispersion of air flow in a single air duct, thereby improving the heat dissipation efficiency. The electric control board 5 is directly located in the first heat dissipation air duct 7, and the heat can be quickly discharged through the air duct; and a part of the lower part of the heat dissipation fins 6 is covered by the air guide cover 3, which is beneficial to guiding the air flow to flow more concentratedly in the second heat dissipation air duct 8 and flowing through the heat dissipation fins 6 from bottom to top, avoiding the dispersion of the heat dissipation air duct of the heat dissipation fins 6 by the fan of the outdoor unit of the air conditioner, and enhancing the heat dissipation effect of the fins; at the same time, the air guide cover 3 does not cover the heat dissipation fins 6 as a whole, providing a better heat dissipation space for the heat dissipation fins 6.

[0040] Due to the design of the second heat dissipation air duct 8, the air flow passing through the heat dissipation fins 6 is relatively independent of the heat exchange area of the electric control board 5, reducing the heating effect of the high-temperature outdoor unit heat exchanger on the air flow in the heat dissipation fin area, thereby reducing the temperature of the air flow entering the second heat dissipation air duct and further enhancing the heat dissipation capacity of the heat dissipation fins. By improving the heat dissipation structure of the electric control box, the heat dissipation conditions of the electric control board are optimized, avoiding the risk of aging and failure of the components of the electric control board due to high temperature, thereby improving the reliability and service life of the entire air conditioning system. At the same time, good heat dissipation performance also helps to maintain the stable operation of the compressor of the outdoor unit of the air conditioner, avoiding frequency limitation due to overheating and affecting the refrigeration effect.

[0041] Further, the lower back plate 12 includes a lower vertical plate 121 and a lower horizontal plate 122. The lower horizontal plate 122 is provided at the top end of the lower vertical plate 121. The lower horizontal plate 122 is perpendicular to the lower vertical plate 121. The first air inlet 71 is provided on the lower horizontal plate 122, and the second air inlet 81 is provided on the lower vertical plate 121.

[0042] The upper back plate 11 includes an upper vertical plate 111 and an upper horizontal plate 112. The upper horizontal plate 112 is provided at the bottom end of the upper vertical plate 111. The upper horizontal plate 112 is perpendicular to the upper vertical plate 111. One end of the upper horizontal plate 112 away from the upper vertical plate 111 is connected to the lower horizontal plate 122, and the upper horizontal plate 112 and the lower horizontal plate 122 are in the same horizontal plane.

[0043] By subdividing the lower back plate 12 into the lower vertical plate 121 and the lower horizontal plate 122, and setting the first air inlet 71 on the lower horizontal plate 122 and the second air inlet 81 on the lower vertical plate 121, such a layout enables air to enter the two heat dissipation air ducts more smoothly. Especially the position of the first air inlet 71, since it is located on the horizontal plate, may be more likely to capture the cold air from the bottom, which is beneficial to improving the air intake efficiency and heat dissipation effect of the first heat dissipation air duct 7. The subdivision of the upper back plate 11 (the upper vertical plate 111 and the upper horizontal plate 112) corresponds to the subdivision of the lower back plate 12, jointly constituting a more regular and optimized air duct structure. This structure helps to reduce the disorder and eddy current of the air flow in the air duct, and improve the air flow efficiency and heat dissipation effect.

[0044] The design of the lower horizontal plate 122 and the upper horizontal plate 112 not only enhances the overall strength of the back plate of the electric control box, but also increases the stability of the back plate of the electric control box through their connection (being in the same horizontal plane). This structure is more reliable in resisting external wind pressure and vibration, and helps to extend the service life of the equipment. The improved structure of the back plate of the electric control box is clearer and more modular, and is also convenient for subsequent maintenance and repair work.

[0045] Furthermore, the upper horizontal plate 112 is also provided with ventilation holes 113, and the ventilation holes 113 are respectively communicated with the first heat dissipation air duct 7 and the second heat dissipation air duct 8.

[0046] The setting of the ventilation holes 113 allows a certain degree of exchange of the air flow between the first heat dissipation air duct 7 and the second heat dissipation air duct 8. This exchange helps to balance the temperature and air flow pressure in the two air ducts, and improve the overall heat dissipation efficiency. Especially in some cases, when the air flow temperature in one air duct is relatively high or the air flow is not smooth, through the exchange function of the ventilation holes 113, relatively colder or smoother air flow can be introduced, thereby improving the heat dissipation effect.

[0047] Due to the connection function of the ventilation holes 113, the two heat dissipation air ducts are no longer completely independent systems, but form an interconnected whole. This design makes the heat dissipation processes of the electronic control board 5 and the heat dissipation fins 6 more coordinated, can make more effective use of the air flow generated by the fan, and improve the heat dissipation performance of the entire electronic control box. Further, the ventilation holes 113 can also play a role in reducing noise. By optimizing the flow path and speed of the air flow, the noise generated due to air flow disorder can be reduced, improving the user experience.

[0048] Furthermore, the air guide cover 3 is provided with two wire-passing rubber rings 31 and two wire-winding components 32. The wire-passing rubber rings 31 are arranged on the front side of the air guide cover 3 and extend towards the direction close to the back plate of the electronic control box. The wire-winding components 32 are arranged on the back side of the air guide cover 3 and extend towards the direction away from the back plate of the electronic control box.

[0049] Two wire-passing holes 114 are provided at the lower part of the upper back plate 11. The wire-passing rubber rings 31 are located below the wire-passing holes 114, and the two wire-passing holes 114 and the two wire-passing rubber rings 31 correspond to each other one by one.

[0050] By arranging the wire-passing rubber rings 31 and the wire-winding components 32, the strong and weak wires in the electronic control box can be orderly managed and fixed. The wire-winding components 32 extend towards the direction away from the back plate of the electronic control box, providing additional fixing points and sorting spaces for the cables, making the cable layout in the entire electronic control box neater and more orderly; the wire-passing rubber rings 31 extend towards the direction close to the back plate of the electronic control box, can tightly wrap the cables to prevent them from loosening or falling off, and pass through the upper back plate 11 through the wire-passing holes 114 in the back plate of the electronic control box and are connected to the components of the electronic control board 5 in the electronic control box. Due to the guiding function of the wire-passing rubber rings 31 and the wire-winding components 32, the cables can be quickly positioned and fixed during installation, thus simplifying the installation process. During maintenance, it is also easier to find and handle cable problems.

[0051] Further explanation, one of the two wire-passing rubber rings 31 is for the passage of strong wires, and the other is for the passage of weak wires, thus realizing the effective isolation of strong and weak wires and reducing the electrical safety hazards caused by cable chaos. This design helps to prevent interference and short-circuit problems between strong and weak electricity, and improves the electrical safety of the electronic control box.

[0052] Furthermore, the upper vertical plate 111 is provided with a first notch, and the upper horizontal plate 112 is provided with a second notch. The first notch and the second notch are connected to form the wire-passing hole 114, and a wire protection ring is provided at the first notch.

[0053] Since the cable passes through the wire rubber ring 31 and the wire passing hole 114 from the rear side of the electric control box to the inside of the electric control box and is electrically connected to the electric control board 5 upward, during the upward bending process, the cable will contact the back plate of the electric control box. The cable being in long-term contact with the back plate of the electric control board is likely to cause wear and damage to the wire. Therefore, mutually perpendicular and communicating notches (wire passing holes 114) are provided at the corresponding positions of the upper vertical plate 111 and the upper horizontal plate 112 of the upper back plate, and a wire protection ring is provided at the first notch to effectively protect the cable passing through the wire passing hole 114. The wire protection ring can reduce the friction and extrusion between the cable and the edge of the back plate, prevent the outer skin of the cable from being damaged or the internal wire from being exposed, thereby extending the service life of the cable and reducing the hidden danger of electrical safety.

[0054] Furthermore, the wire protection ring includes an arc portion 91 and two telescopic portions 92. The two telescopic portions 92 are respectively arranged at both ends of the opening of the arc portion 91, and the two telescopic portions 92 jointly block the opening of the arc portion 91;

[0055] One end of the telescopic portion 92 is a fixed end, the fixed end is fixedly connected to the arc portion 91, the other end of the telescopic portion 92 is an elastic free end, the elastic free end can deform towards the fixed end, and the two elastic free ends are in mutual contact.

[0056] The arc portion 91 of the wire protection ring provides a smooth transition path for the cable, reducing the friction and extrusion suffered by the cable when passing through the wire passing hole 114. At the same time, the two telescopic portions 92 are in mutual contact at the elastic free ends, forming a dynamic and adjustable opening size. The elastic design of the telescopic portion 92 enables the wire protection ring to adaptively fix cables of different thicknesses. When the cable passes through the wire protection ring, the elastic free ends will deform outward to adapt to the diameter of the cable and recover the deformation after the cable passes through, thereby tightly clamping the cable. This adaptive fixing method not only improves the stability of the cable but also reduces the hidden danger of electrical safety caused by the loosening or displacement of the cable.

[0057] Further, the air guide cover 3 is also provided with an insect-proof board 33. The insect-proof board 33 is horizontally arranged in the second heat dissipation air duct 8, and the insect-proof board 33 is located below the heat dissipation fins 6.

[0058] The insect-proof board 33 is horizontally arranged in the second heat dissipation air duct 8 and is located below the heat dissipation fins 6, effectively blocking external foreign matters such as insects, dust, and sundries from entering the inside of the electric control box through the heat dissipation air duct. This can not only protect the heat dissipation fins 6 and other internal components from damage but also prevent the reduction of heat dissipation efficiency caused by the blockage of the air duct by foreign matters.

[0059] Furthermore, a wind guide plate 115 is provided at the first air outlet 72. The upper part of the wind guide plate 115 is connected to the rear side of the upper vertical plate 111, and the lower part of the wind guide plate 115 extends downward.

[0060] The setting of the air deflector 115 can guide the airflow discharged from the first air outlet 72 to flow in a predetermined direction. This guiding effect helps to reduce the disorder and eddy current of the airflow and improve the heat dissipation efficiency. Especially when it is necessary to quickly discharge the hot air outside the electric control box, the air deflector 115 can ensure that the airflow smoothly passes through the air outlet, avoiding heat accumulation inside the electric control box.

[0061] Furthermore, a water baffle 116 is provided at the rear side of the upper back plate 11. The water baffle 116 is arranged below the first air outlet 72 and above the heat dissipation fins 6.

[0062] The heat dissipation fins 6 are an important part of the heat dissipation system of the electric control box, and their performance directly affects the heat dissipation effect. The water baffle 116 is arranged below the first air outlet 72 and above the heat dissipation fins 6, forming an effective waterproof barrier, which can reduce the direct scouring of rainwater on the heat dissipation fins 6, prevent water accumulation or condensation on its surface area, so as to keep the heat dissipation fins 6 dry and clean and ensure that its heat dissipation efficiency is not affected. In rainy days or humid environments, this design can prevent rainwater from directly splashing on the heat dissipation fins 6 or other internal components, thus avoiding potential problems such as short circuits and corrosion, and improving the waterproof performance of the electric control box. Since the water baffle 116 can block the intrusion of rainwater and other moisture, it can extend the service life of the internal components of the electric control box and reduce the failures and maintenance requirements caused by the humid environment. This improves the overall durability and reliability of the electric control box.

[0063] An outdoor unit of an air conditioner, comprising a housing 01, a fan 02 and the above-mentioned heat dissipation structure of the electric control box;

[0064] The fan 02 is arranged on the top wall of the housing 01, the heat dissipation structure of the electric control box is connected to the housing 01, the first air inlet 71 and the second air inlet 81 are respectively communicated with the external space, and the first air outlet 72 and the second air outlet 82 are respectively communicated with the internal space of the housing.

[0065] The fan 02 is arranged on the top wall of the housing 01, while the heat dissipation structure of the electric control box is arranged on the side wall of the housing 01. This layout not only makes full use of the space of the housing, but also enables the airflow to flow smoothly, improving the heat dissipation efficiency. At the same time, the first air inlet 71 and the second air inlet 81 are respectively communicated with the external space, and the first air outlet 72 and the second air outlet 82 are communicated with the internal space of the housing. After the hot air discharged by heat dissipation enters the internal space of the housing, it is discharged outside the housing under the action of the fan, ensuring the continuity and high efficiency of air flow.

[0066] The technical principle of the present utility model has been described in combination with specific embodiments above. These descriptions are only for explaining the principle of the present utility model and cannot be construed as a limitation on the protection scope of the present utility model in any way. Based on the explanations herein, those skilled in the art can readily conceive of other specific embodiments of the present utility model without creative efforts, and these embodiments will fall within the protection scope of the present utility model.

Claims

1. A heat dissipation structure of an electric control box of an outdoor unit of a top-outlet air conditioner, characterized in that: It includes an upper back plate, a lower back plate, an air guide cover and a cover plate; The upper back plate and the lower back plate are arranged up and down to form an electric control box back plate, the front side of the electric control box back plate is provided with an electric control board, the rear side of the electric control box back plate is provided with heat dissipation fins, the cover plate is arranged on the front side of the electric control box back plate and encloses the electric control box back plate to form a first heat dissipation duct, the electric control board is located in the first heat dissipation duct, the air guide cover is arranged on the rear side of the electric control box back plate, and the air guide cover and the electric control box back plate are enclosed to form a second heat dissipation duct, and the lower part of the heat dissipation fin is at least partially located in the second heat dissipation duct; A first air inlet and a second air inlet are provided at the lower portion of the lower back plate, a first air outlet is provided at the upper portion of the upper back plate, and a second air outlet is provided at the upper portion of the air guide cover, the first air inlet and the first air outlet are connected to the first heat dissipation air duct, and the second air inlet and the second air outlet are connected to the second heat dissipation air duct.

2. The heat dissipation structure of the electric control box of the top-outlet air conditioner outdoor unit according to claim 1, characterized in that: The lower back plate includes a lower vertical plate and a lower horizontal plate, the lower horizontal plate is arranged at the top of the lower vertical plate, the lower horizontal plate and the lower vertical plate are perpendicular to each other, the first air inlet is arranged at the lower horizontal plate, and the second air inlet is arranged at the lower vertical plate; The upper back plate includes an upper vertical plate and an upper horizontal plate, the upper horizontal plate is arranged at the bottom end of the upper vertical plate, the upper horizontal plate and the upper vertical plate are perpendicular to each other, one end of the upper horizontal plate away from the upper vertical plate is connected to the lower horizontal plate, and the upper horizontal plate and the lower horizontal plate are in the same horizontal plane.

3. The heat dissipation structure of the electric control box of the top-outlet air conditioner outdoor unit according to claim 2 is characterized by: The upper horizontal plate is further provided with ventilation holes, and the ventilation holes are respectively connected with the first heat dissipation air duct and the second heat dissipation air duct.

4. The heat dissipation structure of the electric control box of the top-outlet air conditioner outdoor unit according to claim 3 is characterized by: The air guide cover is provided with two wire-passing rubber rings and two winding assemblies, wherein the wire-passing rubber rings are provided at the front side of the air guide cover, and the wire-passing rubber rings extend toward the direction close to the back plate of the electric control box, and the winding assemblies are provided at the rear side of the air guide cover, and the winding assemblies extend toward the direction away from the back plate of the electric control box; Two wire-passing holes are arranged at the lower part of the upper back plate, and the wire-passing rubber rings are located below the wire-passing holes. The two wire-passing holes correspond to the two wire-passing rubber rings one by one.

5. The heat dissipation structure of the electric control box of the top-outlet air conditioner outdoor unit according to claim 4, characterized in that: The upper vertical plate is provided with a first notch, the upper horizontal plate is provided with a second notch, the first notch and the second notch are connected to form the wire-passing hole, and a wire protection ring is provided at the first notch.

6. The heat dissipation structure of the electric control box of the top-outlet air conditioner outdoor unit according to claim 5, characterized in that: The wire guard ring includes an arc portion and two telescopic portions, the two telescopic portions are respectively arranged at two ends of the opening of the arc portion, and the two telescopic portions jointly block the opening of the arc portion; One end of the telescopic portion is a fixed end, which is fixedly connected to the arc portion, and the other end of the telescopic portion is an elastic free end, which can be deformed toward the fixed end, and the two elastic free ends abut against each other.

7. The heat dissipation structure of the electric control box of the top-outlet air conditioner outdoor unit according to claim 6, characterized in that: The air guide cover is also provided with an insect-proof plate, which is horizontally arranged in the second heat dissipation air duct and is located below the heat dissipation fins.

8. The heat dissipation structure of the electric control box of the top-outlet air conditioner outdoor unit according to claim 7, characterized in that: An air guide plate is provided at the first air outlet, the upper portion of the air guide plate is connected to the rear side of the upper vertical plate, and the lower portion of the air guide plate extends downward.

9. The heat dissipation structure of the electric control box of the top-outlet air conditioner outdoor unit according to claim 8, characterized in that: A water baffle is also provided on the rear side of the upper back plate, and the water baffle is provided below the first air outlet and above the heat dissipation fins.

10. An air conditioner outdoor unit, characterized in that: include: A housing, a fan and a heat dissipation structure of an electric control box as claimed in any one of claims 1 to 9; The fan is arranged on the top wall of the casing, the heat dissipation structure of the electric control box is connected to the casing, the first air inlet and the second air inlet are respectively connected to the external space, and the first air outlet and the second air outlet are respectively connected to the internal space of the casing.

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