Inverter and photovoltaic system

Abstract

An inverter and a photovoltaic system, relating to the technical field of electrical devices. The inverter comprises: a housing, the housing defining an accommodating cavity used for mounting an electronic device, the lower surface of the housing comprising a first area and a second area, the first area being used for gripping, and the housing being provided with wiring ports; cooling fins, the cooling fins being mounted in the second area; and wiring terminals, the wiring terminals being electrically connected to the wiring ports of the housing, wherein the power of the inverter is less than or equal to 5 kW.

Description

Inverters and photovoltaic systems

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number: 2023225550240 and application date of September 19, 2023, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application belongs to the technical field of electrical equipment, and in particular relates to an inverter and a photovoltaic system. Background Art

[0004] Inverters are commonly used in home photovoltaic systems. Inverters are small in size but relatively heavy. When installing an inverter, the installer needs to grab the inverter for installation and fixation. Since the inverter will emit a lot of heat during operation, most inverters on the market are equipped with cooling fins. When installing and fixing the inverter, the installer's hands are often scratched by the cooling fins, which poses certain safety risks to the installer.

[0005] In the prior art, the safety hazards caused by the heat sink fins are avoided by improving the shape and structure of the heat sink fins. For example, in CN218276497U, multiple heat sink fins are fixed on the inverter housing, and the corners at both ends of the heat sink fins are arc-shaped to prevent the corners of the heat sink fins from scratching the installer. However, this solution only reduces the damage to the installer caused by the corners of the heat sink fins, while the damage to the installer caused by the thin structure of the heat sink fins is not improved.

[0006] Summary of the Invention

[0007] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes an inverter and photovoltaic system that facilitates the installer's grip on the inverter without requiring contact with the heat sink fins. This prevents single-handed force from causing scratches on the sharp edges of the heat sink fins, thereby improving the safety of the installer during work.

[0008] In a first aspect, the present application provides an inverter, comprising:

[0009] A housing defines a receiving cavity for mounting electronic components, wherein a lower surface of the housing includes a first area and a second area, wherein the first area is for gripping, and the housing has a wiring port;

[0010] a heat dissipation fin, the heat dissipation fin being installed in the second area;

[0011] a wiring terminal electrically connected to a wiring port of the housing;

[0012] Wherein, the power of the inverter is less than or equal to 5kW.

[0013] According to the inverter provided in the embodiment of the present application, by providing a first area for gripping and a second area for installing heat sink fins, it is convenient for installers to grip the inverter without having to contact the heat sink fins, thereby avoiding being scratched by the sharp parts of the heat sink fins when applying force with one hand, thereby improving the safety of the installer during work.

[0014] According to one embodiment of the present application, the first region is located on a side of the second region in the length direction of the housing;

[0015] and / or,

[0016] The first region is located outside the second region.

[0017] According to one embodiment of the present application, the lower surface of the shell is provided with a plurality of protrusions protruding outward relative to the lower surface of the shell, and the plurality of protrusions define an air guide port of an air duct facing the heat dissipation fins.

[0018] According to one embodiment of the present application, the side of the protrusion close to the air guide port has an arc segment, and the center of curvature of the arc segment faces downward of the housing; and / or,

[0019] The height of the protrusion is greater than the height of the heat dissipation fin.

[0020] According to one embodiment of the present application, the protrusion is provided in the first area.

[0021] According to one embodiment of the present application, the protrusion is provided at the bottom of the top corner of the housing;

[0022] and / or,

[0023] A protrusion protruding from the lower surface is provided between adjacent protrusions; and / or,

[0024] A protrusion protruding from the lower surface is provided between adjacent protrusions, and the field effect transistor of the inverter is installed at a position corresponding to the protrusion.

[0025] According to one embodiment of the present application, the heat dissipating fins include a plurality of heat dissipating fins spaced apart and distributed along a first direction, a first air flow channel is formed between the plurality of spaced apart heat dissipating fins, the projection of the first end face of each heat dissipating fin on the first plane is wavy, the normal of the first plane is along the first direction, the first end face is the face of the heat dissipating fin facing away from the second area, and a second air flow channel is formed outside the first end faces of the plurality of heat dissipating fins.

[0026] According to an embodiment of the present application, the troughs of the projections of the first end surfaces of at least some of the heat dissipating fins on the first plane are staggered along the second direction to form the second air flow channel outside the first end surfaces of the adjacent plurality of heat dissipating fins.

[0027] According to one embodiment of the present application, the waveforms of the projections of the first end surfaces of the heat dissipating fins on the first plane are the same;

[0028] and / or,

[0029] The wave crests of the first end surfaces of the plurality of heat dissipating fins arranged sequentially along the first direction are staggered in the same direction along the second direction;

[0030] and / or,

[0031] The wave crests of the first end surfaces of any two adjacent heat dissipating fins along the first direction have an equal offset distance in the second direction;

[0032] and / or,

[0033] The second direction is perpendicular to the first direction.

[0034] According to one embodiment of the present application, the field effect transistor in the inverter is installed at a position corresponding to the second area, and the thickness of the area corresponding to the field effect transistor in the wall surface of the housing facing the heat dissipation fin is greater than the thickness of other areas;

[0035] and / or,

[0036] The wall surface of the housing facing the heat dissipation fins is configured to conform to the height of the electronic components inside the wall surface.

[0037] According to one embodiment of the present application, at least some of the heat dissipating fins have ends along their length directions extending at different positions, so as to form a concave-convex structure for gripping between adjacent heat dissipating fins.

[0038] and / or,

[0039] An outer side surface of the heat dissipation fin located at the upper end in the first direction forms a concave-convex structure for gripping.

[0040] According to one embodiment of the present application, the shell is provided with a handle, and the handle is provided near the upper surface of the shell.

[0041] According to one embodiment of the present application, the housing includes:

[0042] Cover body;

[0043] The box body defines the accommodating cavity, the accommodating cavity is provided with a potting compound, the upper surface of the box body is connected to the lower surface of the cover body through the potting compound, and the heat dissipation fins are installed on the lower surface of the box body.

[0044] In a second aspect, the present application provides a photovoltaic system, comprising:

[0045] Install the track;

[0046] The inverter as described in any of the above embodiments, wherein the inverter is installed on the mounting rail;

[0047] A photovoltaic component is installed on the inverter.

[0048] According to the photovoltaic system provided in the embodiment of the present application, by providing a first area for gripping and a second area for installing heat sink fins, it is convenient for installers to grip the inverter without having to make contact with the heat sink fins, thereby avoiding being scratched by the sharp parts of the heat sink fins when applying force with one hand, thereby improving the safety of the installers during work.

[0049] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0051] FIG1 is a schematic diagram of a structure of an inverter according to an embodiment of the present application;

[0052] FIG2 is an exploded view of an inverter provided in an embodiment of the present application;

[0053] FIG3 is a bottom view of a photovoltaic system according to an embodiment of the present application;

[0054] FIG4 is a front view of a photovoltaic system provided in an embodiment of the present application;

[0055] FIG5 is a side view of a photovoltaic system provided in an embodiment of the present application;

[0056] FIG6 is a second structural diagram of an inverter provided in an embodiment of the present application;

[0057] FIG7 is a third structural diagram of an inverter provided in an embodiment of the present application;

[0058] FIG8 is a fourth structural diagram of an inverter provided in an embodiment of the present application;

[0059] FIG9 is a second bottom view of the photovoltaic system provided in an embodiment of the present application.

[0060] Reference numerals:

[0061] Housing 100, cover 110, box 120, heat dissipation fins 121, first end surface 1211, fillet 1212, protrusion 122, first area 123, second area 124, arc segment 125, air guide 126, connection port 130, mounting bracket 140, potting compound 150, handle 160, and ridge 170;

[0062] Wiring terminal 200, mounting rail 300, photovoltaic module 400, roof 500. DETAILED DESCRIPTION

[0063] The following describes in detail embodiments of the present application. Examples of the embodiments 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 only used to explain the present application and are not to be construed as limiting the present application.

[0064] The inverter and photovoltaic system according to the embodiments of the present application are described below with reference to FIG1 to FIG5 .

[0065] An embodiment of the present application provides an inverter, as shown in FIG. 1 to FIG. 5 , which includes a housing 100 , heat dissipation fins 121 and connection terminals 200 .

[0066] As shown in Figures 1 to 5, the inverter is a micro inverter. The power of the micro inverter is less than or equal to 5kW. Micro inverters are usually used in household photovoltaic systems or other small photovoltaic systems. The house area is smaller than that of ordinary photovoltaic systems. Therefore, setting the power of the micro inverter to less than or equal to 5kW can reduce the overall volume of the micro inverter, making it suitable for photovoltaic systems with smaller spaces.

[0067] As shown in Figures 1 to 5, the shell 100 can be a rectangular structure, an elliptical structure or other shape structures. For example, the shell 100 is a rectangular structure, and the four top corners of the shell 100 are rounded to avoid the top corners of the shell 100 being too sharp and causing harm to the installer, thereby improving the safety of the installer.

[0068] As shown in Figure 2, the shell 100 defines a accommodating cavity for installing electronic devices. The accommodating cavity can also be a rectangular structure, an elliptical structure or other shape structures. For example, the accommodating cavity is a rectangular structure to match the shape structure of the shell 100, and the electronic device is installed in the accommodating cavity.

[0069] As shown in Figure 2, the shell 100 has a wiring port 130. The shell 100 can set the wiring port 130 on two side surfaces in the length direction. The shell 100 can also set the wiring port 130 on the side surface in the width direction or other positions. The wiring terminal 200 is electrically connected to the wiring port 130 of the shell 100. One end of the wiring terminal 200 is electrically connected to the wiring port 130 of the shell 100, and the other end of the wiring terminal 200 is electrically connected to other electrical equipment.

[0070] As shown in Figures 1 to 5, the number of wiring ports 130 can be greater than or equal to the number of wiring terminals 200. For example, the number of wiring ports 130 is equal to the number of wiring terminals 200. There can be three wiring ports 130 and three wiring terminals 200, and the three wiring ports 130 are electrically connected to the three wiring terminals 200 in a one-to-one correspondence.

[0071] As shown in Figure 3, the lower surface of the shell 100 includes a first area 123 and a second area 124. The first area 123 is used for grasping. The sum of the area of ​​the first area 123 and the area of ​​the second area 124 is the total area of ​​the lower surface of the shell 100. A blank space is left in the first area 123 on the lower surface of the shell 100 so that the installer can directly grasp the lower surface of the shell 100 with his hands.

[0072] As shown in Figure 3, the heat dissipation fins 121 are installed in the second area 124. The heat dissipation fins 121 extend along the length direction of the shell 100. The heat dissipation fins 121 can be a rectangular structure, a wavy structure or other shape structures. For example, the heat dissipation fins 121 are a rectangular structure. The lengths of each heat dissipation fin 121 in the length direction of the shell 100 can be equal, or the lengths of each heat dissipation fin 121 in the length direction of the shell 100 can be unequal. The heights of each heat dissipation fin 121 in the height direction of the shell 100 can be equal, or the heights of each heat dissipation fin 121 in the height direction of the shell 100 can be unequal.

[0073] During the actual implementation process, when the installer installs and fixes the inverter, he grasps the inverter housing 100 with one hand, and the installer's fingers on the lower surface of the housing 100 can be grasped in the first area 123. After grasping the housing 100, he uses the other hand to install and fix the housing 100 on the roof 500.

[0074] By setting the first area 123 and the second area 124 on the lower surface of the shell 100 and setting the heat dissipation fins 121 in the second area 124, a gripping position can be provided for the installer when installing the inverter, and the installer's hand does not need to come into contact with the heat dissipation fins 121. Since the shell 100 is gripped with one hand when installing the inverter, and the inverter has a certain weight, setting the first area 123 for gripping can avoid being scratched by the sharp part of the heat dissipation fins 121 when exerting force with one hand, relative to directly gripping the heat dissipation fins 121. At the same time, the first area 123 is an integral structure, which is convenient for the installer to grip.

[0075] According to the inverter provided in the embodiment of the present application, by providing a first area 123 for gripping and a second area 124 for installing the heat sink fins 121, it is convenient for installers to grip the inverter without having to contact the heat sink fins 121, thereby avoiding being scratched by the sharp parts of the heat sink fins 121 when applying force with one hand, thereby improving the safety of the installer during work.

[0076] In some embodiments, the first region 123 is located on a side of the second region 124 in the length direction of the housing 100 .

[0077] The first region 123 may be a rectangular structure, an elliptical structure or other shaped structures, and the second region 124 may also be a rectangular structure, an elliptical structure or other shaped structures. For example, both the first region 123 and the second region 124 may be rectangular structures.

[0078] The first area 123 can be located on one side of the second area 124 in the length direction of the shell 100, or on both sides of the second area 124 in the length direction of the shell 100. For example, the first area 123 is located on both sides of the second area 124 in the length direction of the shell 100.

[0079] The first area 123 and the second area 124 of this structural form can be obtained by extending the length of the shell 100 or shortening the length of the heat sink fins 121. For example, the first area 123 located on both sides of the second area 124 in the length direction of the shell 100 is obtained by shortening the length of the heat sink fins 121. All the heat sink fins 121 can be shortened, or some of the heat sink fins 121 can be shortened. The shortening amount of each heat sink fin 121 can be the same, or the shortening amount of each heat sink fin 121 can be different.

[0080] Since the side edges of the shell 100 in the width direction are usually installed and fixed on the roof 500, the first area 123 is set on the side of the shell 100 in the length direction of the second area 124, which can facilitate the installer to grasp the shell 100 and then install and fix the side edges of the shell 100 in the width direction on the roof 500 without changing the grasping position. At the same time, the structure is simple, which can reduce production costs to a certain extent.

[0081] In some embodiments, as shown in FIG. 3 , the first region 123 is located at the periphery of the second region 124 .

[0082] As shown in Figure 3, the first area 123 can be a rectangular structure, an elliptical structure or other shape structures, and the second area 124 can also be a rectangular structure, an elliptical structure or other shape structures. For example, the first area 123 is a hollow rectangular structure, the second area 124 is a rectangular structure, and the second area 124 is located in the hollow part of the first area 123, that is, the second area 124 is surrounded by the first area 123.

[0083] By setting the first area 123 to be located on the periphery of the second area 124, the area of ​​the first area 123 can be increased, providing installers with multi-directional gripping space so that installers with different operating habits can all grip the housing 100 steadily and quickly install and fix the inverter.

[0084] In other embodiments, the middle portion of the heat sink 121 may be partitioned, and the first region 123 may extend from the side of the second region 124 into the second region 124, that is, the partitioned portion in the heat sink 121 is also the first region 123, so that when the installer grasps the housing 100, the installer's thumb can be located in the partitioned portion in the heat sink 121 and straightened, thereby facilitating the installer to exert force to grasp the inverter.

[0085] In some embodiments, as shown in FIG3 , the lower surface of the housing 100 is provided with one or more protrusions 122 protruding outward relative to the lower surface of the housing 100 , and the multiple protrusions 122 define an air duct 126 toward the heat dissipation fins 121 .

[0086] As shown in FIG3 , the heat dissipating fins 121 are spaced apart along the width direction of the housing 100 , and the gap between two adjacent heat dissipating fins 121 forms an air duct for the heat dissipating fins 121 , that is, the air duct extends along the length direction of the housing 100 .

[0087] As shown in Figure 3, when the protrusion 122 is a single protrusion, the protrusion 122 supports the lower surface of the shell 100 so that the lower surface of the shell is at a certain distance from the roof 500, thereby forming an open air guide port 126; at least two of the multiple protrusions 122 of the protrusion 122 are spaced apart along the width direction of the shell 100, and the area enclosed by the two protrusions 122 spaced apart along the width direction of the shell 100, the lower surface of the shell 100 and the upper surface of the roof 500 form an air guide port 126, and at least part of the air duct of the heat dissipation fins 121 is exposed at the air guide port 126.

[0088] For example, as shown in Figure 3, the lower surface of the shell 100 is provided with four protrusions 122, and the four protrusions 122 are paired in twos. The two pairs of protrusions 122 are spaced apart along the length direction of the shell 100, and the two protrusions 122 in each pair are spaced apart along the width direction of the shell 100, that is, the four protrusions 122 form two air guide ports 126.

[0089] As shown in FIG3 , the protrusion 122 may be a cylindrical structure, a rectangular structure, or other shaped structures. For example, the protrusion 122 is a cylindrical structure.

[0090] During actual implementation, when the air flows along the length direction of the shell 100, the protrusion 122 diverts the air, and a part of the air is gathered at the air guide port 126, and after passing through the air guide port 126, it flows in the air duct of the heat sink fin 121, thereby taking away the heat on the heat sink fin 121 to cool down the heat sink fin 121.

[0091] By setting the above-mentioned protrusion 122, an air guide port 126 can be set on the air duct of the heat dissipating fin 121, so that the flowing air is gathered at the air guide port 126, and the flowing air is guided into the air duct of the heat dissipating fin 121, thereby improving the heat dissipation efficiency of the heat dissipating fin 121 and ensuring the heat dissipation effect of the heat dissipating fin 121.

[0092] In some embodiments, as shown in Figure 3, the protrusion 122 can be arranged in the first area or the second area on the lower surface of the shell 100. Preferably, in order to avoid the end of the fin cutting the operator's fingers and to avoid the protrusion 122 occupying the space in the first area and causing a decrease in heat dissipation efficiency, the protrusion 122 is arranged in the first area 123.

[0093] As shown in Figure 3, the protrusion 122 is located in the first area 123, and the heat dissipating fin 121 is located in the second area 124, that is, multiple protrusions 122 are all located on the side of the heat dissipating fin 121. At this time, there is no partition between the heat dissipating fins 121. The heat dissipating fin 121 extends from one side of the second area 124 in the length direction of the shell 100 to the other side of the second area 124 in the length direction of the shell 100. While forming the air guide 126, it does not affect the size of the heat dissipating fin 121, thereby ensuring the heat dissipation area of ​​the heat dissipating fin 121 and thus ensuring the heat dissipation effect of the heat dissipating fin 121.

[0094] In some embodiments, as shown in FIG. 3 , the protrusion 122 is disposed at the bottom of the top corner of the housing 100 .

[0095] As shown in Figure 3, the four protrusions 122 can be respectively located at the bottom of the four top corners of the shell 100, and the air ducts formed by the heat dissipating fins 121 can be located in the air guide ports 126 formed by two adjacent protrusions 122, so that the flowing air gathered by the air guide ports 126 can flow through most of the air ducts of the heat dissipating fins 121, further improving the heat dissipation efficiency and heat dissipation effect of the heat dissipating fins 121.

[0096] In some embodiments, as shown in FIG. 9 , protrusions 122 are provided at the top corners of the lower surface of the housing 100 , and ridges 170 protruding from the lower surface are provided between adjacent protrusions 122 .

[0097] Among them, ridges 170 are provided between the protrusions 122 spaced apart along the first direction X. One or more ridges 170 can be provided. For example, as shown in FIG9 , a plurality of ridges 170 are provided. The plurality of ridges 170 are spaced apart along the first direction X. The ridges 170 can also be provided between the protrusions 122 spaced apart along the second direction Y.

[0098] By providing the ridges 170 , the roughness of the first region 123 can be increased, thereby increasing the friction when the worker grasps the first region 123 , thereby increasing the stability during grasping.

[0099] In some embodiments, protrusions 170 protruding from the lower surface are provided between adjacent protrusions 122, and the field-effect transistors of the inverter are mounted at positions corresponding to the protrusions 170. The protrusions 170 are provided in the first region 123 and are located between the protrusions 122 spaced apart along the first direction X and the protrusions 122 spaced apart along the second direction Y.

[0100] Since the ridge 170 protrudes relative to the lower surface of the shell 100, the thickness of the shell 100 at the position where the ridge 170 is located is thicker than the thickness of the shell 100 at other positions. Installing the field effect transistor at the position where the ridge 170 is located can increase the heat transferred from the wall of the shell 100, further improving the heat dissipation effect of the field effect transistor.

[0101] In some embodiments, as shown in Figures 6 and 7, the heat dissipating fins 121 include a plurality of heat dissipating fins 121 spaced apart and distributed along the first direction X, a first air flow channel is formed between the plurality of spaced apart heat dissipating fins 121, a first end surface 1211 of each heat dissipating fin 121 is projected in a wavy shape on the first plane, the normal of the first plane is along the first direction X, the first end surface 1211 is the surface of the heat dissipating fin 121 away from the second area 124, and a second air flow channel is formed outside the first end surfaces 1211 of the plurality of heat dissipating fins 121.

[0102] The first direction X can be the length direction of the shell 100 or the width direction of the shell 100. For example, as shown in Figure 7, the first direction X is the length direction of the shell 100, that is, multiple heat dissipating fins 121 are distributed in parallel and spaced apart along the length direction of the shell 100.

[0103] As shown in FIG6 and FIG7 , the end surface of the heat dissipation fin 121 not connected to the housing 100 is the first end surface 1211 of the heat dissipation fin 121 , and the projection of the first end surface 1211 of the heat dissipation fin 121 on the first plane is a wavy line.

[0104] The projection of the first end surface 1211 of the heat dissipating fin 121 on the first plane may be a regular wavy line, such as a sine wave, a sawtooth wave, a square wave, a trapezoidal wave or other types of waveforms, or may be a random wavy line.

[0105] The plurality of spaced-apart heat dissipating fins 121 may be arranged in parallel along the first direction, or two adjacent heat dissipating fins 121 may be arranged to have a certain angle between them.

[0106] A first air flow channel is formed between the heat dissipating fins 121, and a second air flow channel is formed outside the first end surface 1211 of the multiple heat dissipating fins 121. Since the end of the first air flow channel facing away from the lower surface of the shell 100 is open, the second air flow channel outside the first end surface 1211 can be connected to the first air flow channel at the end facing away from the lower surface of the shell 100, and there is a certain angle between the first air flow channel and the second air flow channel.

[0107] During the actual implementation process, as shown in Figures 6 and 7, when the inverter is dissipating heat, the air flows in the first air flow channel formed between two adjacent heat dissipation fins 121. Since the direction of the air flowing through the heat dissipation fins 121 during heat dissipation is not fixed, and there is a certain angle between the first air flow channel and the second air flow channel, when the air flows through the heat dissipation fins 121 in a direction intersecting with the extension direction of the first air flow channel, part of the air can flow through the heat dissipation fins 121 along the second air flow channel, and when flowing through the second air flow channel, the air that has absorbed the heat of the electronic components in the first air flow channel is brought out, thereby achieving heat dissipation of the electronic components.

[0108] By setting the first end surface 1211 of the heat dissipating fin 121 to be wavy, a second air flow channel connected to the first air flow channel can be formed outside the first end surface 1211, so that when the air flow direction intersects with the extension direction of the first air flow channel, the high-temperature air in the first air flow channel can be brought out from the second air flow channel, thereby facilitating the discharge of hot air between the heat dissipating fins 121 out of the space where the heat dissipating fins 121 are located, thereby improving the heat dissipation effect of the heat dissipating fins 121.

[0109] In some embodiments, as shown in Figures 6 and 7, the waveforms of the first end surfaces 1211 of each heat dissipating fin 121 are the same, and the troughs of the projections of the first end surfaces 1211 of at least some of the heat dissipating fins 121 on the first plane are staggered along the second direction Y to form a second airflow channel outside the first end surfaces of the adjacent multiple heat dissipating fins 121.

[0110] As shown in FIG6 and FIG7 , the waveform, amplitude and frequency of each heat dissipating fin 121 on the first end surface 1211 are the same, so that the same wave shape is formed on the first end surface 1211 of each heat dissipating fin 121 .

[0111] In other embodiments, the waveform, amplitude, and frequency of the projection of the first end surface 1211 of each heat dissipating fin 121 on the first plane are different.

[0112] As shown in Figures 6 and 7, the waveform of the projection of the first end surface 1211 of at least part of the heat dissipating fins 121 on the first plane has a phase difference along the second direction Y, and the second direction Y is perpendicular to the first direction X. For example, the first direction X is the length direction of the shell 100, and the second direction Y is the width direction of the shell 100. Since the waveform of the projection of the first end surface 1211 of at least part of the heat dissipating fins 121 on the first plane has a phase difference along the second direction Y, when viewed from the first direction X, the crests of the heat dissipating fins 121 with the phase difference are misaligned in the first direction X, and the troughs of the heat dissipating fins 121 with the phase difference are misaligned in the first direction X.

[0113] It can be understood that if the troughs of the projections of the first end surfaces 1211 of the heat dissipating fins 121 on the first plane are aligned along the second direction Y, a straight air duct extending along the first direction X can be formed between the crests of the plurality of heat dissipating fins 121, and air can flow in the air duct extending along the first direction X. Therefore, by setting the troughs of the projections of at least some of the first end surfaces 1211 of the heat dissipating fins 121 on the first plane to be staggered along the second direction Y, a curved air duct extending at least partially along the first direction X can be formed between the troughs of the plurality of heat dissipating fins 121, thereby extending the time that the air flows in the air duct extending along the first direction X, and further improving the heat dissipation effect and heat dissipation capacity of the heat dissipating fins 121.

[0114] In some embodiments, as shown in Figures 6 and 7, the crests of the first end surfaces 1211 of a plurality of heat sink fins 121 arranged sequentially along the first direction X are sequentially staggered in the same direction along the second direction Y, and the crests of the first end surfaces 1211 of any two adjacent heat sink fins 121 along the first direction X are staggered by the same distance in the second direction Y, and the second direction Y is perpendicular to the first direction X.

[0115] As shown in Figures 6 and 7, there is a phase difference between two adjacent heat sinks 121, and the direction and distance of the misalignment are the same. For example, the second heat sink 121 has a misalignment of 1 / 8 wavelength relative to the first heat sink 121 in the second direction Y, and the third heat sink 121 has a misalignment of 1 / 8 wavelength relative to the second heat sink 121 in the same direction in the second direction Y, and so on.

[0116] By disposing the above-mentioned heat dissipating fins 121, the first end surfaces 1211 of the plurality of heat dissipating fins 121 form a straight air duct, and the extension direction of the air duct has an angle with the first direction X, that is, the air duct is inclined relative to the first direction X, thereby reducing the resistance of the first end surface 1211 of the heat dissipating fin 121 to the air, and at the same time extending the path of the air duct to improve the heat dissipation effect.

[0117] In some embodiments, the ratio a of the offset distance of the wave crests of the first end surfaces 1211 of two adjacent heat dissipating fins 121 in the second direction Y to the spacing distance between the two adjacent heat dissipating fins 121 along the first direction X satisfies: 15°≤arctana≤75°.

[0118] Since the wavy arrangement of the first end surfaces 1211 of the multiple heat dissipating fins 121 forms an air duct intersecting the first direction X, arctana,a is used to represent the ratio of the offset distance of the wave crests of the first end surfaces 1211 of two adjacent heat dissipating fins 121 in the second direction Y to the spacing distance between the two adjacent heat dissipating fins 121 along the first direction X. The angle between the air duct intersecting the first direction X formed by the wavy arrangement of the first end surfaces 1211 of the multiple heat dissipating fins 121 and the first direction X can be obtained.

[0119] The value range of arctana is [15°, 75°]. The specific value of arctana can be 15°, 25°, 30°, 45°, 60°, 75° or other values ​​between 15° and 75°, which is not specifically limited here.

[0120] By setting arctana to satisfy 15°≤arctana≤75°, the probability of poor heat dissipation due to a short air duct path intersecting the first direction X formed by the wavy arrangement of the first end face 1211 caused by a too small arctana can be reduced. At the same time, the probability of poor heat dissipation due to a too large arctana causing the air duct direction formed by the first end face 1211 to be the same as the air duct direction originally formed between the heat dissipation fins 121 can be reduced.

[0121] In some embodiments, the wavelength of the first end surface 1211 of the heat dissipation fin 121 is L, and the wave height is H, which satisfies the following conditions: 5 mm ≤ L ≤ 50 mm, 1 mm ≤ H ≤ 10 mm.

[0122] Among them, the value range of L is [5mm, 50mm]. L can be specifically 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 40mm, 50mm or other values ​​between 5mm-50mm, which are not specifically limited here.

[0123] The value range of H is [1mm, 10mm], and the specific value of L can be 1mm, 2mm, 3mm, 4mm, 6mm, 8mm, 9mm, 10mm or other values ​​between 1mm-10mm, which are not specifically limited here.

[0124] It can be understood that if the wavelength of the first end surface 1211 of the heat dissipating fin 121 is too large, the number of air ducts formed by the first end surface 1211 of the heat dissipating fin 121 will be reduced, thereby reducing the heat dissipation effect; if the wavelength of the first end surface 1211 of the heat dissipating fin 121 is too small, the width of the air duct formed by the first end surface 1211 of the heat dissipating fin 121 is narrow, resulting in difficulty for air to flow in the air duct, thereby affecting the heat dissipation effect. Therefore, the wavelength L of the first end surface 1211 of the heat dissipating fin 121 is set to satisfy 5mm≤L≤50mm, which can increase the number of air ducts formed by the first end surface 1211 while increasing the width of the air duct, thereby facilitating air flow and improving heat dissipation efficiency.

[0125] At the same time, if the wave height of the first end surface 1211 of the heat dissipating fin 121 is too large, the area of ​​the heat dissipating fin 121 will be reduced, thereby reducing the heat dissipation effect; if the wave height of the first end surface 1211 of the heat dissipating fin 121 is too small, the waveform of the first end surface 1211 of the heat dissipating fin 121 will not be obvious, that is, the depth of the air duct formed by the first end surface 1211 is small, and it is difficult for air to flow along the air duct. Therefore, the wave height H of the first end surface 1211 of the heat dissipating fin 121 is set to meet 1mm≤H≤10mm, which can increase the depth of the air duct while increasing the area of ​​the heat dissipating fin 121, thereby further improving the heat dissipation efficiency.

[0126] In some embodiments, as shown in FIG. 6 and FIG. 7 , the first direction X is the length direction of the housing 100 , or the first direction X forms an acute angle with the length direction of the housing 100 .

[0127] As shown in Figures 6 and 7, when the first direction X is the length direction of the shell 100, the multiple heat dissipation fins 121 are spaced apart and distributed along the length direction of the shell 100, and the wavy shape of the first end surfaces 1211 of the multiple heat dissipation fins 121 forms an air duct having an angle with the length direction of the shell 100.

[0128] When the first direction X forms an acute angle with the length direction of the housing 100, the plurality of heat dissipating fins 121 are spaced apart and distributed along the first direction X, and the wavy shape of the first end surfaces 1211 of the plurality of heat dissipating fins 121 can form an air duct extending along the length direction of the housing 100, thereby increasing the time that air flows in the air ducts in different directions.

[0129] In some embodiments, as shown in FIG. 6 and FIG. 7 , a first end surface 1211 of the heat dissipating fin 121 is provided with a rounded corner 1212 at a top corner in the length direction of the heat dissipating fin 121 .

[0130] A rounded corner 1212 is provided at the connection between the first end surface 1211 of the heat dissipation fin 121 and the two side surfaces of the heat dissipation fin 121 in the length direction thereof.

[0131] By setting a rounded corner 1212 at the top corner of the first end surface 1211 of the heat dissipating fin 121 in the longitudinal direction of the heat dissipating fin 121, the smoothness of the heat dissipating fin 121 can be improved, the probability of workers being scratched by the corners of the heat dissipating fin 121 can be reduced, and the safety of workers during work can be improved.

[0132] In some embodiments, as shown in FIG8 , the first cross-section of the heat dissipation fin 121 is a trapezoid, the lower base of which is one end connected to the second region 124 , and the normal of the first cross-section is along the length direction of the heat dissipation fin 121 .

[0133] As shown in Figure 8, the cross-section obtained by cutting the heat sink fin 121 along its own width direction is a first cross-section, and the first cross-section is a trapezoid. Since the lower base width of the trapezoid is greater than the upper base width, the lower surface width of the heat sink fin 121 is greater than the upper surface width, and the lower surface of the heat sink fin 121 is used to be connected to the second area 124, and the lower ends of two adjacent heat sink fins 121 are spaced apart and distributed along the first direction X.

[0134] In actual implementation, when the electronic device generates heat during operation, the heat is transferred through the wall of the housing 100 to the lower surface of the heat dissipation fins 121 , and then transferred from the lower surface of the heat dissipation fins 121 to the upper surface of the heat dissipation fins 121 .

[0135] Since the width of the heat dissipating fin 121 gradually decreases from the lower surface to the upper surface, the first cross-section of the heat dissipating fin 121 is set to a trapezoid, which can increase the heat absorbed by the lower end of the heat dissipating fin 121 connected to the second area 124, thereby increasing the cooling speed of the electronic device. At the same time, the upper end width of the heat dissipating fin 121 is smaller, which can increase the width of the air duct formed between two adjacent heat dissipating fins 121, thereby increasing the air flow and improving the heat dissipation effect.

[0136] In some embodiments, the field effect transistors in the inverter are installed at positions corresponding to the second region 124 .

[0137] It can be understood that among the various electronic devices arranged in the inverter, the field effect transistor generates more heat during operation, that is, the area where the field effect transistor is located is the high-temperature area of ​​the inverter. Therefore, the field effect transistor is set to be installed at a position corresponding to the second area 124, which can increase the contact area between the wall of the shell 100 corresponding to the field effect transistor and the heat dissipation fins 121, thereby improving the heat dissipation effect of the heat dissipation fins 121 on the field effect transistor, while having less impact on the first area 123 used for gripping.

[0138] In some embodiments, the thickness of the area corresponding to the field effect transistor in the wall surface of the housing 100 facing the heat dissipation fins 121 is greater than the thickness of other areas.

[0139] Among them, the field effect transistor can be arranged in the middle position of the second area 124, or it can be arranged at other positions of the second area 124. For example, if the field effect transistor is arranged in the middle position of the second area 124, the thickness of the wall connecting the shell 100 and the heat dissipation fins 121 at the position corresponding to the field effect transistor in the second area 124 will increase.

[0140] The surface of the area corresponding to the field effect transistor in the wall of the housing 100 facing the heat dissipation fins 121 can be flat or wavy to improve the heat dissipation effect.

[0141] By increasing the thickness of the area of ​​the housing 100 facing the heat dissipation fins 121 corresponding to the field effect transistor, the heat absorbed by the area of ​​the housing 100 corresponding to the field effect transistor can be increased, thereby further increasing the heat dissipation speed of the field effect transistor and improving the heat dissipation efficiency.

[0142] In some embodiments, the wall of the housing 100 facing the heat dissipating fins 121 is contoured relative to the height of the electronic components on the inner side of the wall.

[0143] Among them, the electronic devices in the inverter are of different types, shapes, and heights. The distance between each position of the wall of the shell 100 facing the heat dissipating fins 121 and the circuit board is equal to the height of the electronic devices corresponding to each position of the wall. For example, if the height of a certain electronic device is higher, the position of the wall of the shell 100 facing the heat dissipating fins 121 corresponding to the electronic device protrudes outward in the direction away from the electronic device. At this time, the electronic device can be installed between the circuit board and the groove formed by the outward protrusion of the wall, so that the distance between the wall of the shell 100 facing the heat dissipating fins 121 and the electronic device is equal.

[0144] During the actual implementation process, the circuit board for installing electronic devices is installed in the accommodating cavity, and the circuit board is located at a position in the accommodating cavity away from the heat dissipating fins 121, and the electronic devices are installed between the side of the circuit board facing the heat dissipating fins 121 and the wall of the shell 100 facing the heat dissipating fins 121.

[0145] In the inverter after installation, the side of the shell 100 facing away from the heat sink 121 is flat. Since the height of the electronic component is smaller than the height of the heat sink 121, the part of the shell 100 protruding outward toward the heat sink 121 is difficult to protrude upward from the heat sink 121. That is, from the perspective of the inverter as a whole, it is difficult to see multiple protrusions of different heights.

[0146] By setting the wall of the shell 100 facing the heat dissipation fins 121 to be highly contoured relative to the electronic components on the inner side of the wall, the overall neatness of the inverter can be improved. At the same time, the thickness of other areas of the shell 100 except the part corresponding to the field effect transistor can be made equal, thereby improving the thickness uniformity of the shell 100.

[0147] In some embodiments, as shown in Figures 6 and 7, the first area 123 includes an area outside the heat dissipation fin 121 located at the upper end in the first direction X, and the heat dissipation fin 121 located at the upper end in the first direction X is spaced apart from the edge of the housing 100 in the length direction of the heat dissipation fin 121.

[0148] As shown in FIG6 and FIG7 , the first area 123 on the lower surface of the housing 100 includes an area outside the two outermost heat dissipation fins 121 in the first direction X, and the area is for workers to grasp.

[0149] Since the inverter usually needs to connect the side in the second direction Y to the mounting rail 300 during installation, the first area 123 is set to include the area outside the heat dissipation fins 121 located at the upper end in the first direction X, which can facilitate workers to grasp the inverter when installing the inverter and the mounting rail 300.

[0150] In some embodiments, at least some of the heat sink fins 121 have different extension positions at their ends along their own length direction to form a concave-convex structure for gripping between adjacent multiple heat sink fins 121; and / or, the outer side surface of the heat sink fin 121 located at the upper end in the first direction forms a concave-convex structure for gripping.

[0151] The heat dissipation fins 121 may extend along the length direction of the housing 100 or along the width direction of the housing 100 .

[0152] The end of the heat dissipation fin 121 that is closer to the extension position forms a concave part of the concave-convex structure, which is used to place the staff's fingers. The end of the heat dissipation fin 121 that is farther from the extension position forms a convex part of the concave-convex structure, which can be located between two fingers, thereby forming a concave-convex structure for grasping as a whole.

[0153] When the heat dissipation fins 121 extend along the width direction of the shell 100, the first direction is the length direction of the shell 100, and the outer side surfaces of the two outermost heat dissipation fins 121 located in the length direction of the shell 100 form a concave-convex structure. A curved or discontinuous concave-convex structure can be formed on the outer side surfaces of the two outermost heat dissipation fins 121. The projection of the concave-convex structure in the second area can be an S-shaped structure or other shape structures.

[0154] By setting the above-mentioned concave-convex structure, the position where the staff grasps the inverter can be limited, reducing the probability of injury caused by the staff grasping other positions. At the same time, the length of some heat dissipation fins 121 can be extended to a certain extent, thereby further improving the heat dissipation effect and heat dissipation efficiency of the heat dissipation fins 121.

[0155] In some embodiments, as shown in FIG. 6 to FIG. 8 , the housing 100 is provided with a handle 160 .

[0156] The handle 160 can be arranged on the side of the shell 100 in the first direction X, or on the side of the shell 100 in the second direction Y or at other positions. For example, as shown in Figures 6-8, the handle 160 is arranged on the side of the shell 100 in the second direction Y.

[0157] The handle 160 may be disposed at a middle position of the side surface of the housing 100 in the second direction Y, or at a side portion of the side surface of the housing 100 in the second direction Y or at other positions.

[0158] By providing the handle 160 , a worker can carry the inverter by the handle 160 when transporting the inverter, thereby facilitating the transportation of the inverter and improving the efficiency of transporting the inverter.

[0159] In some embodiments, as shown in FIG. 6 to FIG. 8 , the handle 160 is disposed near the upper surface of the housing 100 .

[0160] As shown in Figures 6 to 8, the handle 160 is arranged on the side of the shell 100 in the second direction Y close to the upper surface of the shell 100. The side of the handle 160 facing away from the heat dissipating fins 121 in the height direction of the shell 100 can be set flush with the upper surface of the shell 100, or can be set to have a smaller distance from the upper surface of the shell 100.

[0161] During the actual implementation process, since the upper surface of the inverter is basically flat, when the inverter needs to be transported to the designated location, the upper surfaces of the two inverters can be put together. At this time, the handles 160 of the two inverters are also put together. The staff's hands can pass through the handles 160 of the two inverters at the same time and lift the two inverters.

[0162] It should be noted that when transporting the inverter, the peaks and troughs on the first end faces 1211 of the heat dissipation fins 121 of the two inverters can be staggered and interlocked with each other, so that the two inverters can be combined and transported together. The staggered and interlocked peaks and troughs of the heat dissipation fins 121 of the two inverters can improve the firmness when multiple inverters are stacked.

[0163] By arranging the handle 160 near the upper surface of the housing 100 , the distance between the handles 160 of the two inverters can be reduced when the worker lifts the two inverters at the same time, thereby facilitating the worker's hands to grasp the two handles 160 at the same time.

[0164] In some embodiments, as shown in FIG. 3 and FIG. 5 , the side of the protrusion 122 close to the air guide port 126 has an arc segment 125 , and the center of curvature of the arc segment 125 faces downward of the housing 100 .

[0165] As shown in Figures 3 and 5, the four protrusions 122 are respectively located at the bottom of the four top corners of the shell 100, and the sides of the protrusions 122 facing the adjacent protrusions 122 have arc segments 125. The arc segments 125 can be connected to the lower surface of the protrusion 122 and the lower surface of the shell 100, and the arc segments 125 can also be connected to the sides of the protrusions 122 and the lower surface of the shell 100.

[0166] The center of curvature of the arc segment 125 is toward the bottom of the shell 100, and the arc segments 125 located on the side close to each other on the two protrusions 122 forming the air guide outlet 126 are arranged relative to each other. For example, as shown in Figures 3 and 5, the arc segment 125 of the left protrusion 122 is set to the right, and the arc segment 125 of the right protrusion 122 is set to the left. At this time, the two arc segments 125 and the lower surface of the shell 100 form an arch-shaped air guide outlet 126.

[0167] By setting the above-mentioned arc segment 125, an arched air guide port 126 can be formed, thereby improving the convergence effect of the air guide port 126 and increasing the air flow rate of the air duct flowing through the heat dissipation fins 121, so as to further improve the heat dissipation efficiency and heat dissipation effect of the heat dissipation fins 121.

[0168] In some embodiments, as shown in FIG. 4 and FIG. 5 , the height of the protrusion 122 is greater than the height of the heat dissipation fin 121 .

[0169] As shown in Figures 4 and 5, the distance between the lower surface of the protrusion 122 and the lower surface of the shell 100 is greater than the distance between the lower surface of the heat dissipation fin 121 and the lower surface of the shell 100, and the height of the protrusion 122 is less than the distance between the lower surface of the photovoltaic module 400 and the upper surface of the roof 500, so as to ensure that the inverter can be installed between the photovoltaic module 400 and the roof 500.

[0170] As shown in Figures 4 and 5, when the inverter is installed on the roof 500, the lower surface of the protrusion 122 is supported on the upper surface of the roof 500. Since the height of the protrusion 122 is greater than the height of the heat dissipation fins 121, when the protrusion 122 is supported on the roof 500, there is a certain gap between the lower surface of the heat dissipation fins 121 and the upper surface of the roof 500.

[0171] By setting the height of the protrusion 122 to be greater than the height of the heat dissipating fin 121, a certain gap can be created between the heat dissipating fin 121 and the roof 500, and air can flow in the gap. When the air flows in the gap, it can take away the heat from the lower surface of the heat dissipating fin 121, thereby increasing the heat dissipation area of ​​the heat dissipating fin 121 and improving the heat dissipation effect and heat dissipation efficiency of the heat dissipating fin 121.

[0172] In some embodiments, as shown in FIG. 2 , the housing 100 includes a cover 110 and a box 120 .

[0173] As shown in Figure 2, the box body 120 defines a accommodating cavity with an opening at the top, the heat dissipation fins 121 are installed on the lower surface of the box body 120, the lower surface of the box body 120 includes a first area 123 and a second area 124, a potting compound 150 is provided in the accommodating cavity, the upper surface of the box body 120 is connected to the lower surface of the cover body 110 through the potting compound 150, and a wiring port 130 is provided on the box body 120.

[0174] During the actual implementation process, the electronic device is installed in the accommodating cavity of the box body 120, the cover body 110 is covered, and the terminal 200 is electrically connected to the wiring port 130 on the box body 120, and then the high-temperature liquid potting glue 150 is poured into the accommodating cavity. When the potting glue 150 solidifies, the cover body 110 is connected to the box body 120.

[0175] The arrangement of the cover 110 and the box 120 facilitates the installation of electronic components. The cover 110 and the box 120 are connected by the potting glue 150 , which ensures a firm connection and simple operation.

[0176] An embodiment of the present application further provides a photovoltaic system, as shown in FIG3-FIG5 , which includes a mounting rail 300 , an inverter as described in any of the above embodiments, and a photovoltaic assembly 400 .

[0177] 3 to 5 , the photovoltaic system may be a photovoltaic system used in a home. The inverter is provided with a mounting frame 140 on one side in the width direction. The mounting frame 140 is used to be connected to a mounting rail 300. The mounting rail 300 is installed on a roof 500. The inverter is installed on the mounting rail 300. The photovoltaic module 400 is installed on the inverter.

[0178] During the actual implementation process, when installing the inverter, the installer grasps the first area 123 of the inverter with one hand, fixes the inverter mounting frame 140 to the mounting rail 300 with screws, and then installs the photovoltaic module 400 on the inverter, and makes the photovoltaic module 400 cover the mounting rail 300 and the inverter.

[0179] According to the photovoltaic system provided in the embodiment of the present application, by providing a first area 123 for gripping and a second area 124 for installing the heat dissipation fins 121, it is convenient for installers to grip the inverter without having to contact the heat dissipation fins 121, thereby avoiding being scratched by the sharp parts of the heat dissipation fins 121 when applying force with one hand, thereby improving the safety of the installers during work.

[0180] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0181] In the description of this application, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0182] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0183] In the description of this application, “plurality” means two or more.

[0184] In the description of the present application, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features being in contact with each other not directly but via another feature therebetween.

[0185] In the description of this application, a first feature “on”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0186] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," 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 application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0187] Although the embodiments of the present application 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 intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An inverter, characterized in that: include: A housing, wherein the housing defines a receiving cavity for mounting electronic devices, wherein a lower surface of the housing includes a first area and a second area, wherein the first area is used for gripping, and the housing has a wiring port; A heat dissipation fin, wherein the heat dissipation fin is installed in the second area; A wiring terminal, the wiring terminal being electrically connected to a wiring port of the housing; Wherein, the rated power of the inverter is less than or equal to 5 kW.

2. The inverter according to claim 1, characterized in that: The first region is located at a side of the second region in the length direction of the shell; and / or, The first region is located at the periphery of the second region.

3. The inverter according to claim 1 or 2, characterized in that: The lower surface of the shell is provided with a plurality of protrusions protruding outward relative to the lower surface of the shell, and the plurality of protrusions define an air guide port of an air duct facing the heat dissipation fins.

4. The inverter according to claim 3, characterized in that: The side of the protrusion close to the air guide port has an arc segment, and the center of curvature of the arc segment faces downward of the shell; and / or, The height of the protrusion is greater than the height of the heat dissipation fin.

5. The inverter according to claim 3 or 4, characterized in that: The protrusion is disposed in the first area.

6. The inverter according to any one of claims 3 to 5, characterized in that: The protrusion is provided at the bottom of the top corner of the housing; and / or, A protrusion protruding from the lower surface is provided between adjacent protrusions; and / or, A convex strip protruding from the lower surface is provided between adjacent protrusions, and the field effect transistor of the inverter is installed at a position corresponding to the convex strip.

7. The inverter according to any one of claims 1 to 6, characterized in that: The heat dissipation fins include a plurality of heat dissipation fins spaced apart and distributed along a first direction, a first air flow channel is formed between the plurality of spaced apart heat dissipation fins, a first end surface of each heat dissipation fin is projected in a wavy shape on a first plane, a normal line of the first plane is along the first direction, the first end surface is a surface of the heat dissipation fin facing away from the second area, and a second air flow channel is formed outside the first end surfaces of the plurality of heat dissipation fins.

8. The inverter according to claim 7, characterized in that: The troughs of the projections of the first end surfaces of at least some of the heat dissipating fins on the first plane are staggered along the second direction to form the second air flow channel outside the first end surfaces of the adjacent plurality of heat dissipating fins.

9. The inverter according to claim 7 or 8, characterized in that: The projection waveforms of the first end surfaces of the heat dissipating fins on the first plane are the same; and / or, The wave crests of the first end surfaces of the plurality of heat dissipating fins arranged sequentially along the first direction are staggered in the same direction along the second direction; and / or, The wave crests of the first end surfaces of any two adjacent heat dissipating fins along the first direction have an equal offset distance in the second direction; and / or, The second direction is perpendicular to the first direction.

10. The inverter according to any one of claims 1 to 9, characterized in that: The field effect transistor in the inverter is installed at a position corresponding to the second area, and the thickness of the area corresponding to the field effect transistor in the wall surface of the housing facing the heat dissipation fin is greater than the thickness of other areas; and / or, The wall surface of the housing facing the heat dissipation fins is configured to conform to the height of the electronic components inside the wall surface.

11. The inverter according to any one of claims 1 to 10, characterized in that: The ends of at least some of the heat dissipation fins along their length direction extend at different positions, so as to form a concave-convex structure for gripping between adjacent heat dissipation fins; and / or, The outer side surface of the heat dissipation fin located at the upper end in the first direction forms a concave-convex structure for gripping.

12. The inverter according to any one of claims 1 to 11, characterized in that: The shell is provided with a handle, and the handle is arranged at a position close to the upper surface of the shell.

13. The inverter according to any one of claims 1 to 12, characterized in that: The housing comprises: Cover body; The box body defines the accommodating cavity, the accommodating cavity is provided with a potting glue, the upper surface of the box body is connected to the lower surface of the cover body through the potting glue, and the heat dissipation fins are installed on the lower surface of the box body.

14. A photovoltaic system, characterized in that: include: Install the track; The inverter according to any one of claims 1 to 13, wherein the inverter is mounted on the mounting rail; A photovoltaic component is installed on the inverter.

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