Photovoltaic three-phase inverter

Abstract

The utility model provides a photovoltaic three-phase inverter which comprises a shell, a first heat dissipation fin, a second heat dissipation fin and a third heat dissipation fin, and the distance between the side, away from the shell, of the first heat dissipation fin and the first face is recorded as a. And the distance from one side, deviating from the shell, of each second heat dissipation fin to the first surface is recorded as b. And the distance from one side, deviating from the shell, of the third radiating fin to the first surface is recorded as c. Wherein a, b and c meet the relational expression that a > b > c. According to the photovoltaic three-phase inverter provided by the invention, the probability of collision or damage is reduced through the fins with different heights. Even if an external object collides with the shell, the high first heat dissipation fins are firstly contacted, the fins can protect the subsequent short second heat dissipation fins and third heat dissipation fins from being damaged to a certain extent, and the second heat dissipation fins can also protect the shorter third heat dissipation fins from being damaged, so that layer-by-layer protection is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic accessories, and in particular to a photovoltaic three-phase inverter. Background Art

[0002] With the continuous development of photovoltaic power generation technology, the performance and reliability of photovoltaic three-phase inverters, as the core components of photovoltaic power generation systems, directly affect the efficiency and stability of the entire photovoltaic power generation system. Traditional photovoltaic three-phase inverters usually adopt a closed shell structure to protect the internal electronic components and circuit boards from the influence of the external environment. However, although the closed shell design can effectively protect the internal components, it also brings certain heat dissipation problems.

[0003] During the operation of a photovoltaic three-phase inverter, the internal electronic components will generate a lot of heat. If this heat cannot be dissipated in a timely and effective manner, the operating temperature of the inverter will be too high, thereby affecting its operating efficiency and may even cause failures and damage. In order to solve this problem, in the prior art, a heat dissipation structure, such as heat dissipation fins or fans, is usually set on the housing of the inverter. However, although setting the heat dissipation structure directly on the outside of the housing can enhance the heat dissipation effect, it also brings new problems.

[0004] First, the external heat dissipation structure is easily affected by external collisions and damages in actual use, especially when used in outdoor environments. It may be deformed or damaged by factors such as wind, rain, and collisions with debris, thus affecting the heat dissipation performance and overall service life of the inverter. Second, the external heat dissipation structure may increase the size and weight of the inverter, which is not conducive to installation and maintenance.

[0005] Therefore, how to optimize the heat dissipation performance without affecting the inverter protection function has become an important technical issue in the design of photovoltaic three-phase inverters. In response to this problem, the utility model proposes an improved photovoltaic three-phase inverter, which effectively improves the heat dissipation efficiency by setting multiple groups of heat dissipation fins of different heights at specific positions of the shell, while reducing the risk of damage to the heat dissipation structure, and solves the problem that the external heat dissipation structure in the prior art is easily affected by external collision and damage in actual use. Utility Model Content

[0006] In view of this, it is necessary to provide a photovoltaic three-phase inverter to solve the above problems.

[0007] An embodiment of the present application provides a photovoltaic three-phase inverter, comprising:

[0008] A housing, wherein the outer side of the housing has a first surface;

[0009] A first heat dissipation fin is disposed on the first surface, and a distance from a side of the first heat dissipation fin facing away from the housing to the first surface is denoted as a;

[0010] A second heat dissipation fin is disposed on the first surface, and a distance from a side of the second heat dissipation fin facing away from the housing to the first surface is denoted as b;

[0011] A third heat dissipation fin is disposed on the first surface, and a distance from a side of the third heat dissipation fin facing away from the housing to the first surface is denoted as c;

[0012] Wherein, a, b and c satisfy the relationship: a>b>c.

[0013] In at least one embodiment of the present application, the photovoltaic three-phase inverter includes a plurality of the first heat sink fins, a plurality of the second heat sink fins, and a plurality of the third heat sink fins. The shell has a second surface facing away from the first surface. The plurality of the first heat sink fins, the plurality of the second heat sink fins, and the plurality of the third heat sink fins are dispersedly arranged on the first surface and the second surface.

[0014] In at least one embodiment of the present application, a ventilation plate is provided on the shell, a plurality of ventilation holes are opened on the ventilation plate, the plurality of ventilation holes are arranged vertically and horizontally, and the interior of the shell is connected with the outside through the ventilation holes.

[0015] In at least one embodiment of the present application, the ventilation plate is connected to the housing by bolts.

[0016] In at least one embodiment of the present application, a plurality of inwardly concave heat dissipation grooves are provided on the shell, and the plurality of inwardly concave heat dissipation grooves are arranged at intervals.

[0017] In at least one embodiment of the present application, a side of the first heat dissipation fin away from the housing has a first arc surface, and the first arc surface protrudes from the first heat dissipation fin;

[0018] The second heat dissipation fin has a second curved surface on a side away from the housing, and the second curved surface protrudes from the second heat dissipation fin;

[0019] The third heat dissipation fin has a third curved surface on a side away from the housing, and the third curved surface protrudes from the third heat dissipation fin.

[0020] In at least one embodiment of the present application, a cylindrical heat dissipation portion is provided on the first heat dissipation fin, the second heat dissipation fin, and the third heat dissipation fin.

[0021] In at least one embodiment of the present application, the housing, the first heat dissipation fins, the second heat dissipation fins and the third heat dissipation fins are integrally formed.

[0022] In at least one embodiment of the present application, the housing, the first heat sink fins, the second heat sink fins and the third heat sink fins are made of aluminum alloy.

[0023] In at least one embodiment of the present application, a mounting hole is provided on the ventilation plate, and external screws are inserted into the mounting hole to fix the ventilation plate to an external object.

[0024] The photovoltaic three-phase inverter provided above reduces the probability of collision or damage by designing fins of different heights. Even if an external object hits the housing, the first thing that comes into contact is the higher first heat sink fins. The existence of these fins can protect the subsequent shorter second heat sink fins and third heat sink fins from damage to a certain extent, and the second heat sink fins can also protect the shorter third heat sink fins from damage, providing layers of protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural stereogram of a photovoltaic three-phase inverter;

[0026] Figure 2 This is a structural stereogram of a photovoltaic three-phase inverter;

[0027] Figure 3 for Figure 1 A local enlarged view of point A;

[0028] Figure 4 for Figure 2 A partial enlarged view of point B.

[0029] Main component symbols

[0030] 100. Photovoltaic three-phase inverter; 1. Shell; 11. First surface; 12. Second surface; 13. Concave heat dissipation groove; 2. First heat dissipation fin; 21. First arc surface; 3. Second heat dissipation fin; 31. Second arc surface; 4. Third heat dissipation fin; 41. Third arc surface; 5. Ventilation plate; 51. Ventilation port; 52. Mounting hole; 6. Cylindrical heat dissipation part. DETAILED DESCRIPTION

[0031] The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0032] It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "located on" another component, it may be directly located on the other component or there may be a central component at the same time. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and similar expressions used herein are for illustrative purposes only.

[0033] An embodiment of the present application provides a photovoltaic three-phase inverter, comprising:

[0034] A housing, wherein the outer side of the housing has a first surface;

[0035] A first heat dissipation fin is disposed on the first surface, and a distance from a side of the first heat dissipation fin facing away from the housing to the first surface is denoted as a;

[0036] A second heat dissipation fin is disposed on the first surface, and a distance from a side of the second heat dissipation fin facing away from the housing to the first surface is denoted as b;

[0037] A third heat dissipation fin is disposed on the first surface, and a distance from a side of the third heat dissipation fin facing away from the housing to the first surface is denoted as c;

[0038] Wherein, a, b and c satisfy the relationship: a>b>c.

[0039] The photovoltaic three-phase inverter provided above reduces the probability of collision or damage by designing fins of different heights. Even if an external object hits the housing, the first thing that comes into contact is the higher first heat sink fins. The existence of these fins can protect the subsequent shorter second heat sink fins and third heat sink fins from damage to a certain extent, and the second heat sink fins can also protect the shorter third heat sink fins from damage, providing layers of protection.

[0040] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0041] See also Figure 1-Figure 4, an embodiment of the present application provides a photovoltaic three-phase inverter 100, comprising a housing 1, a first heat sink fin 2, a second heat sink fin 3 and a third heat sink fin 4, wherein the first heat sink fin 2 is arranged on the first surface 11, and the distance from the side of the first heat sink fin 2 facing away from the housing 1 to the first surface 11 is recorded as a. The second heat sink fin 3 is arranged on the first surface 11, and the distance from the side of the second heat sink fin 3 facing away from the housing 1 to the first surface 11 is recorded as b. The third heat sink fin 4 is arranged on the first surface 11, and the distance from the side of the third heat sink fin 4 facing away from the housing 1 to the first surface 11 is recorded as c;

[0042] Wherein, a, b and c satisfy the relationship: a>b>c.

[0043] Specifically, the housing 1 serves as the main protective structure of the photovoltaic three-phase inverter 100, wrapping and protecting the internal electronic components and circuits. It provides a protective function to protect the internal components from the influence of the external environment, such as dust, moisture, physical collision, etc. The first heat sink fin 2 is one of the main heat sink components, which is arranged on the first surface 11 of the housing 1 and has the largest height a. By increasing the surface area, the heat dissipation capacity is maximized, thereby improving the heat dissipation efficiency. At the same time, as the fin with the highest height, it plays a protective role and first absorbs the impact force when the external collision occurs. The second heat sink fin 3 has a medium height b and is arranged on the first surface 11 for auxiliary heat dissipation. In conjunction with the first heat sink fin 2, a multi-layer heat sink structure is formed to improve the heat dissipation efficiency and enhance the air convection effect. As a fin of medium height, it further disperses the impact force of the outside world and protects the shorter fins. The third heat sink fin 4 has a minimum height c and serves as an auxiliary heat sink fin to supplement the heat dissipation of the first and second heat sink fins 3. Further optimize the heat dissipation path, balance the heat distribution, and prevent local overheating. As the fin with the lowest height, it is protected by the higher fins and is not easily damaged by direct impact. a, b and c satisfy the relationship: a>b>c. Designing heat dissipation fins of different heights makes the heat dissipation system more three-dimensional and multi-layered. The design of fins of different heights not only increases the heat dissipation surface area and convection effect, but also provides step-by-step buffering protection in the event of external collisions. The highest fins absorb the impact first, the medium-height fins further disperse the impact, and the lowest fins are protected from the least impact.

[0044] In a specific example, the photovoltaic three-phase inverter 100 includes a plurality of the first heat sink fins 2, a plurality of the second heat sink fins 3, and a plurality of the third heat sink fins 4. The shell 1 has a second surface 12 facing away from the first surface 11. The plurality of the first heat sink fins 2, the plurality of the second heat sink fins 3, and the plurality of the third heat sink fins 4 are dispersedly arranged on the first surface 11 and the second surface 12.

[0045] Specifically, a plurality of first heat dissipation fins 2 are mounted on the first surface 11 and the second surface 12 of the housing 1, and the height of each fin is a. Provide the main heat dissipation path, and improve the heat dissipation efficiency by increasing the surface area in contact with the air. A plurality of second heat dissipation fins 3 are also distributed on the first surface 11 and the second surface 12 of the housing 1, and the height of each fin is b, which is lower than the first heat dissipation fin 2. As auxiliary heat dissipation fins, they cooperate with the first heat dissipation fin 2 to form a multi-level heat dissipation structure to improve the overall heat dissipation effect. A plurality of third heat dissipation fins 4 are distributed on the first surface 11 and the second surface 12 of the housing 1, and the height of each fin is c, which is lower than the second heat dissipation fin 3. Further assist heat dissipation, optimize the heat dispersion path, balance heat distribution, and prevent local overheating. The second surface 12 is located on the opposite side of the housing 1, opposite to the first surface 11, and increases the layout area of ​​the heat dissipation fins. By arranging the heat dissipation fins on the second surface 12, the heat dissipation surface area is further increased, and the heat dissipation effect is enhanced. A plurality of first, second and third heat dissipation fins 4 are dispersedly arranged on both sides of the housing 1, namely the first surface 11 and the second surface 12. By evenly distributing the heat dissipation fins on the two surfaces to form a double-sided heat dissipation structure, not only the heat dissipation area is increased, but also the heat dissipation through convection and radiation can be improved to improve the overall heat dissipation efficiency. The dispersed setting can also reduce the heat concentration in a single part and improve the reliability and durability of the heat dissipation system. The heat generated by the internal components of the photovoltaic three-phase inverter 100 is conducted to the first surface 11 and the second surface 12 through the housing 1. After the heat is conducted to the first surface 11 and the second surface 12, it is transferred to the first, second and third heat dissipation fins 4 distributed on the two surfaces. The first heat dissipation fin 2 (height a) is the main heat dissipation component, which first contacts with the outside air and dissipates a large amount of heat. The second heat dissipation fin 3 (height b) and the third heat dissipation fin 4 (height c) are respectively used as auxiliary heat dissipation components to further disperse the heat and form a multi-level heat dissipation system. The fin design with different heights forms a three-dimensional multi-layer heat dissipation structure on both sides, which achieves efficient heat dissipation by increasing the air contact area and accelerating air convection. The double-sided heat dissipation design allows heat to be dissipated not only through the first surface 11, but also through the second surface 12, significantly improving the heat dissipation efficiency.

[0046] In a specific example, a ventilation plate 5 is provided on the shell 1 , and a plurality of ventilation holes 51 are opened on the ventilation plate 5 . The plurality of ventilation holes 51 are arranged vertically and horizontally, and the interior of the shell 1 is connected with the outside through the ventilation holes 51 .

[0047] Specifically, a ventilation plate 5 is provided on the shell 1 to provide a ventilation path for the interior. The ventilation plate 5 can allow external air to flow into the interior of the inverter, promote heat dissipation, reduce the temperature of the equipment, and improve work efficiency and stability. A plurality of vents 51 are provided on the ventilation plate 5 to increase the ventilation volume. The plurality of vents 51 can simultaneously introduce more fresh air, accelerate the heat dissipation process, effectively reduce the temperature of the equipment, and improve the heat dissipation efficiency. The vents 51 are arranged vertically and horizontally so that air can evenly enter and flow out of the inverter. The uniform arrangement of the vents 51 can ensure that the internal heat can be quickly replaced by fresh air, prevent local overheating, and maintain stable operation of the equipment. The vents 51 connect the interior of the shell 1 with the external environment. Through the vents 51, the hot air inside the shell 1 can be quickly discharged, and fresh air can quickly flow in, so as to achieve effective circulation and dissipation of heat and ensure continuous and stable operation of the equipment.

[0048] In a specific example, the ventilation plate 5 is connected to the housing 1 by bolts.

[0049] Specifically, the bolt connection provides a firm mechanical connection to ensure that the ventilation plate 5 is stably fixed to the housing 1. This connection method can withstand various mechanical stresses, such as vibration, impact, etc., to maintain the overall stability and reliability of the equipment. The bolt connection is easy to disassemble, which is convenient for the installation and replacement of the ventilation plate 5. When equipment maintenance, cleaning or replacement of the ventilation plate 5 is required, maintenance personnel can easily loosen the bolts and remove the ventilation plate 5, thereby reducing maintenance time and labor intensity. By adjusting the tightness of the bolts, the tightness of the connection between the ventilation plate 5 and the housing 1 can be accurately controlled. This adjustability helps to ensure the sealing and stability of the ventilation plate 5 and the housing 1, and avoid reduced heat dissipation efficiency or dust entry due to loose connection. The bolt connection ensures that the ventilation plate 5 is firmly fixed, thereby ensuring the alignment and unobstructedness of the ventilation holes and maximizing the heat dissipation effect. Through a reliable connection, the ventilation plate 5 can effectively guide the air flow, enhance the heat dissipation performance of the equipment, prevent overheating, and improve the operating efficiency and life of the equipment.

[0050] In a specific example, a plurality of inwardly concave heat dissipation slots 13 are formed on the housing 1 , and the plurality of inwardly concave heat dissipation slots 13 are spaced apart from each other.

[0051] Specifically, the arrangement of the concave heat dissipation groove 13 forms a depression on the surface of the housing 1, which increases the heat dissipation surface area. The surface area in contact with the external air is increased, the heat dissipation efficiency is improved, and it helps to reduce the temperature of the device. The design of the concave heat dissipation groove 13 can form multiple heat conduction channels. The heat conduction path on the surface of the housing 1 is optimized, so that the heat can be more evenly distributed and dissipated, preventing local overheating. The presence of the concave heat dissipation groove 13 improves the heat dissipation capacity of the housing 1. By increasing the heat dissipation surface area and optimizing the heat conduction path, the heat generated inside can be more effectively dissipated, and the overall heat dissipation effect can be improved. The concave heat dissipation groove 13 promotes air flow under the action of wind. The air can flow through the heat dissipation groove more smoothly, accelerate the heat dissipation, and improve the heat dissipation efficiency. The heat generated inside is conducted to the concave heat dissipation groove 13 area through the surface of the housing 1. Under the action of the concave heat dissipation groove 13, the heat is more effectively dissipated to the external environment. Under the action of the wind, the external air flows through the concave heat dissipation groove 13, taking away the heat, and achieving the heat dissipation effect.

[0052] In a specific example, the first heat dissipation fin 2 has a first curved surface 21 on a side away from the housing 1 , and the first curved surface 21 protrudes from the first heat dissipation fin 2 ;

[0053] The second heat dissipation fin 3 has a second curved surface 31 on a side away from the housing 1 , and the second curved surface 31 protrudes from the second heat dissipation fin 3 ;

[0054] The third heat dissipating fin 4 has a third curved surface 41 on a side away from the housing 1 , and the third curved surface 41 protrudes from the third heat dissipating fin 4 .

[0055] Specifically, the first heat sink fin 2 has an arc-shaped design on the side away from the housing 1, namely, a first arc surface 21, which protrudes from the edge of the first heat sink fin 2. Similarly, the second heat sink fin 3 has an arc-shaped design on the side away from the housing 1, namely, a second arc surface 31, which protrudes from the edge of the second heat sink fin 3. The third heat sink fin 4 also has an arc-shaped design on the side away from the housing 1, namely, a third arc surface 41, which protrudes from the edge of the third heat sink fin 4. This design helps to reduce the sharp edges of the heat sink fins, making the impact surface smoother when it is hit, thereby reducing the risk of human injury.

[0056] In a specific example, the first heat dissipation fin 2 , the second heat dissipation fin 3 and the third heat dissipation fin 4 are all provided with a cylindrical heat dissipation portion 6 .

[0057] Specifically, this description shows that in the photovoltaic three-phase inverter 100, the design of the first heat sink fin 2, the second heat sink fin 3 and the third heat sink fin 4 all include a cylindrical heat sink 6. The cylindrical heat sink 6 refers to the part with a series of cylindrical protrusions on the surface of these heat sink fins. These cylindrical heat sinks 6 are usually arranged along the length direction of the heat sink fins, or along the width direction, or may be arranged in both directions at the same time. The function of these cylindrical heat sinks 6 is to increase the surface area of ​​the heat sink fins, thereby improving the heat dissipation efficiency. Due to the increase in the surface area of ​​the heat sink fins, more heat can be dissipated to the surrounding environment, which helps to reduce the internal temperature of the photovoltaic three-phase inverter 100 and maintain the normal working state of the equipment. In addition, the design of the cylindrical heat sink 6 can also improve air flow, increase the contact area between the air and the surface of the heat sink fins, and further improve the heat transfer efficiency. This is particularly important for photovoltaic inverters that operate for a long time and in high temperature environments, because they require a more efficient heat dissipation system to maintain the stability and reliability of the equipment.

[0058] In a specific example, the housing 1 , the first heat dissipation fins 2 , the second heat dissipation fins 3 and the third heat dissipation fins 4 are integrally formed.

[0059] Specifically, one-piece molding means that the housing 1 and the heat sink fins are manufactured as a whole component, rather than manufacturing them separately and then assembling them together. This means that during the manufacturing process, the housing 1 and the heat sink fins are formed at the same time, usually through processes such as injection molding or die casting. Since the housing 1 and the heat sink fins are molded in one piece, their connection is more secure, the structure is more stable, and they are less likely to loosen or separate, thereby improving the stability and reliability of the equipment. Compared to manufacturing the housing 1 and the heat sink fins separately, one-piece molding can reduce the number of steps and costs in the assembly process and improve production efficiency. Since the housing 1 and the heat sink fins are molded in one piece, the contact between them is closer and the heat transfer is more effective, thereby improving the heat dissipation efficiency.

[0060] In a specific example, the housing 1 , the first heat dissipation fins 2 , the second heat dissipation fins 3 and the third heat dissipation fins 4 are made of aluminum alloy.

[0061] Specifically, aluminum alloy is a lightweight metal that is lighter than other metal materials, such as steel. Therefore, using aluminum alloy to manufacture the housing 1 and the heat sink fins can reduce the overall weight of the device, making the device easier to carry, install and maintain. Aluminum alloy has excellent thermal conductivity and can quickly transfer heat from the inside of the device to the surface of the heat sink fins, and then dissipate it to the external environment through the heat sink fins. This helps to keep the internal temperature of the device stable and avoid overheating damage. Aluminum alloy has good corrosion resistance and can resist oxidation, corrosion and corrosion in the atmospheric environment. This means that the equipment can operate stably for a long time under various environmental conditions, extending its service life. Aluminum alloy is easy to process and form, and can meet the design requirements of different shapes and sizes. This makes the production process more flexible, and various complex shapes of housings 1 and heat sink fins can be customized to optimize the heat dissipation effect.

[0062] In a specific example, a mounting hole 52 is provided on the ventilation plate 5 , and external screws are inserted into the mounting hole 52 to fix the ventilation plate 5 on an external object.

[0063] Specifically, the ventilation plate 5 is a component on the inverter housing, which is used to increase the ventilation and heat dissipation effect and keep the internal temperature of the device stable. The ventilation plate 5 is provided with mounting holes 52, which are located at the edge or specific position of the ventilation plate 5. External screws can be inserted through these mounting holes 52 to fix the ventilation plate 5 on an external object, such as a bracket, a rack or a mounting frame of the inverter. By fixing with screws, it can be ensured that the ventilation plate 5 is firmly mounted on the device and will not move or fall off due to external vibration or wind. The fixed ventilation plate 5 can effectively maintain its position on the surface of the device, ensure that the ventilation hole is aligned with the heat dissipation component, thereby ensuring the ventilation and heat dissipation effect. The stable ventilation plate 5 not only helps to keep the internal temperature of the device stable, but also increases the overall stability of the device and reduces the possibility of the device being disturbed by external forces in the external environment. The mounting holes 52 on the ventilation plate 5 can make it easier for maintenance personnel to disassemble and replace the ventilation plate 5, and are also convenient for positioning and fixing during installation, saving time and cost for maintenance and installation.

[0064] The above is only an implementation method of the present application. It should be pointed out that a person skilled in the art can make improvements without departing from the inventive concept of the present application, but these improvements are within the scope of protection of the present application.

Claims

1. A photovoltaic three-phase inverter, characterized in that: include: A housing, wherein the outer side of the housing has a first surface; A first heat dissipation fin is disposed on the first surface, and a distance from a side of the first heat dissipation fin facing away from the housing to the first surface is denoted as a; A second heat dissipation fin is disposed on the first surface, and a distance from a side of the second heat dissipation fin away from the housing to the first surface is denoted as b; A third heat dissipation fin is disposed on the first surface, and a distance from a side of the third heat dissipation fin facing away from the housing to the first surface is denoted as c; Wherein, a, b and c satisfy the relationship: a>b>c.

2. The photovoltaic three-phase inverter according to claim 1, characterized in that: The photovoltaic three-phase inverter includes a plurality of the first heat sink fins, a plurality of the second heat sink fins, and a plurality of the third heat sink fins. The shell has a second surface facing away from the first surface. The plurality of the first heat sink fins, the plurality of the second heat sink fins, and the plurality of the third heat sink fins are dispersedly arranged on the first surface and the second surface.

3. The photovoltaic three-phase inverter according to claim 1, characterized in that: The shell is provided with a ventilation plate, and a plurality of ventilation holes are opened on the ventilation plate. The plurality of ventilation holes are arranged vertically and horizontally, and the interior of the shell is connected with the outside through the ventilation holes.

4. The photovoltaic three-phase inverter according to claim 3, characterized in that: The ventilation plate is connected to the housing by bolts.

5. The photovoltaic three-phase inverter according to claim 1, characterized in that: The shell is provided with a plurality of inwardly concave heat dissipation slots, and the plurality of inwardly concave heat dissipation slots are arranged at intervals.

6. The photovoltaic three-phase inverter according to claim 1, characterized in that: A side of the first heat dissipation fin away from the housing has a first arc surface, and the first arc surface protrudes from the first heat dissipation fin; The second heat dissipation fin has a second curved surface on a side away from the housing, and the second curved surface protrudes from the second heat dissipation fin; The third heat dissipation fin has a third curved surface on a side away from the housing, and the third curved surface protrudes from the third heat dissipation fin.

7. The photovoltaic three-phase inverter according to claim 1, characterized in that: The first heat dissipation fin, the second heat dissipation fin and the third heat dissipation fin are all provided with a cylindrical heat dissipation portion.

8. The photovoltaic three-phase inverter according to claim 1, characterized in that: The housing, the first heat dissipation fins, the second heat dissipation fins and the third heat dissipation fins are integrally formed.

9. The photovoltaic three-phase inverter according to claim 1, characterized in that: The housing, the first heat dissipation fins, the second heat dissipation fins and the third heat dissipation fins are made of aluminum alloy.

10. The photovoltaic three-phase inverter according to claim 3, characterized in that: The ventilation plate is provided with a mounting hole, and external screws are inserted into the mounting hole to fix the ventilation plate on an external object.

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