CN220964150U - Electrical equipment and photovoltaic power generation system with same - Google Patents

Abstract

The utility model discloses an electrical device and a photovoltaic power generation system with the same. The electrical device includes: the box, sunshade and fixed bolster are equipped with the interface of reserving on the box, and the sunshade sets up in the top of box, and the sunshade is connected to the one end of fixed bolster, and the other end of fixed bolster is suitable for installing in the interface of reserving, and the orthographic projection of box in the horizontal plane is located the orthographic projection of sunshade in the horizontal plane, the sunshade sets up for the horizontal plane slope. According to the electrical equipment, the shielding plate is arranged above the box body, so that the box body can be protected, the temperature of the box body is prevented from being increased due to direct solar radiation, the durability of the shielding plate is improved due to the fact that the shielding plate is obliquely arranged relative to the horizontal plane, and faults possibly caused by the fact that the shielding plate is stressed greatly due to accumulation of sundries such as rain and snow are avoided.

Description

Electrical equipment and photovoltaic power generation system with same

Technical Field

The utility model relates to the technical field of photovoltaic power generation, in particular to electrical equipment and a photovoltaic power generation system with the same.

Background

For higher power generation efficiency, photovoltaic power plants are often built in outdoor areas with strong illumination. However, when higher illumination energy is brought, strong solar radiation can obviously improve the surface temperature of electrical equipment such as an inverter and a transformer, seriously affect the heat dissipation of the equipment, directly affect the power generation efficiency of a power station, and can cause the electrical equipment such as the transformer and the inverter to burn when serious. When the electric equipment is subjected to severe weather such as rain, snow, strong wind and the like, sundries such as rain, snow, leaves and the like are easily accumulated on the electric equipment, and the service life of the electric equipment is also influenced.

Disclosure of utility model

The present utility model aims to solve, at least to some extent, one of the above technical problems in the prior art. Therefore, the utility model provides the electrical equipment, which not only can effectively reduce the solar radiation on the surface of the electrical equipment, but also is not easy to cause the phenomenon that sundries are accumulated on the top.

The utility model further provides a photovoltaic power generation system with the electrical equipment.

An electrical device according to an embodiment of the present utility model includes: the box, sunshade and fixed bolster, be equipped with the interface of reserving on the box, the sunshade sets up the top of box, the one end of fixed bolster is connected the sunshade, the other end of fixed bolster be suitable for install in the interface of reserving, the orthographic projection of box in the horizontal plane is located the orthographic projection of sunshade in the horizontal plane, the sunshade sets up for the horizontal plane slope.

According to the electrical equipment provided by the embodiment of the utility model, the box body can be protected by arranging the shielding plate above the box body, so that the temperature of the box body is prevented from being increased due to direct solar radiation, and the durability of the shielding plate is improved by obliquely arranging the shielding plate relative to the horizontal plane, so that possible faults caused by larger stress of the equipment due to accumulation of sundries such as rain and snow on the shielding plate in severe weather are avoided.

According to some embodiments of the utility model, the shield is a flat plate, and a first included angle is formed between the shield and a horizontal plane, and the first included angle is not zero.

According to some embodiments of the utility model, the upper surface of the shutter is provided with at least one groove structure, one end of which extends upwards along the shutter, and the other end of which extends downwards along the shutter;

Wherein the groove structure is recessed towards the direction of the box body; and/or the groove structure is recessed in a direction away from the case.

According to some embodiments of the utility model, a portion of the shutter is in contact with the case.

According to some embodiments of the utility model, the distance between the shutter and the case is greater than zero, the shutter being spaced from the case by the fixing bracket.

On the horizontal plane, the shielding plate outwards exceeds the box body.

According to some embodiments of the utility model, the case has a case upper surface facing the shutter, and the reserved interface is provided on the case upper surface.

According to some embodiments of the utility model, the fixing support comprises a support body and support arms, the support body is connected with the shielding plate, the support arms are connected with the support body, the number of the reserved interfaces is not more than that of the reserved interfaces, and the support arms are connected with the reserved interfaces at corresponding positions through fasteners.

According to some embodiments of the utility model, the surface of the shutter is provided with an anti-corrosion coating.

According to another aspect of the utility model, a photovoltaic power generation system includes the electrical apparatus described above.

According to the photovoltaic power generation system provided by the embodiment of the utility model, the shielding plate is arranged above the box body, so that the box body can be protected, the box body temperature is prevented from being increased due to direct solar radiation, the durability of the shielding plate is improved due to the inclined arrangement of the shielding plate relative to the horizontal plane, and the possible faults caused by the fact that the shielding plate is stressed greatly due to accumulation of sundries such as rain and snow in severe weather are avoided.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a side view of an electrical device according to an embodiment of the utility model;

Fig. 2 is a schematic perspective view of an electrical device according to an embodiment of the utility model;

FIG. 3 is a schematic illustration of the attachment of a shutter to a fixed bracket;

FIG. 4 is a schematic perspective view of a shutter;

Fig. 5 is a perspective view of the fixing bracket;

FIG. 6 is a schematic view of a reserved interface at the top of the tank;

Fig. 7 is a schematic diagram of the connection of the fixing bracket to the case.

Reference numerals:

The electric device 10, the case 1, the case body 11, the support plate 12, the first plate 121, the second plate 122, the reserved interface 123, the shutter 2, the groove structure 21, the fixing bracket 3, the bracket body 31, the bracket arm 32, the bracket plate 321, and the bracket hole 322.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

An electrical apparatus 10 and a photovoltaic power generation system having the electrical apparatus 10 according to an embodiment of the present utility model are described in detail below with reference to fig. 1 to 7.

Referring to fig. 1, an electrical apparatus 10 according to an embodiment of the present utility model may include a case 1, a shutter 2, and a fixing bracket 3.

Wherein, form electric installation space in the box 1, electrical equipment 10 still includes electrical components, and electrical components installs in box 1, and electrical components is located electric installation space.

Alternatively, the case 1 may be configured in a frame structure, so that when the case 1 is flowed by wind, the electric components in the case 1 can be cooled by wind to dissipate heat, and the influence of the over-high temperature of the electric components on the working reliability is prevented.

Alternatively, the case 1 may be a container.

The box 1 is provided with a reserved interface 123, the shielding plate 2 is arranged above the box 1, one end of the fixing support 3 is connected with the shielding plate 2, and the other end of the fixing support 3 is suitable for being arranged at the reserved interface 123 of the box 1 so as to realize the installation and fixation of the shielding plate 2 above the box 1. The fixed support 3 is of a frame structure, so that the fixed support 3 has small air flow interference between the shielding plate 2 and the box body 1, and the air flow between the shielding plate 2 and the box body 1 is not influenced excessively.

The orthographic projection of the case 1 in the horizontal plane is located in the orthographic projection of the shielding plate 2 in the horizontal plane, so that the shielding plate 2 can shield and protect the case 1 as much as possible above the case 1, and the case 1 is prevented from being directly radiated by the sun to cause the temperature rise of the case 1.

In some embodiments of the utility model, the shutter 2 is arranged obliquely with respect to the horizontal plane. Referring to fig. 1, the left end of the louver 2 is closer to the case 1, and the right end of the louver 2 is farther from the case 1, so that the louver 2 is inclined, and even if sundries fall over the louver 2 when it encounters bad weather such as rain, snow, hail, and strong wind, the sundries slip down from the louver 2 due to the inclination angle of the louver 2. In other words, by obliquely arranging the shielding plate 2 relative to the horizontal plane, the durability of the shielding plate 2 is improved, and possible faults caused by larger stress of equipment due to accumulation of sundries such as rain, snow and leaves of the shielding plate 2 in severe weather are avoided. That is, the inclined design of the shielding plate 2 relative to the horizontal plane can prevent sundries such as rain, snow, leaves and the like from accumulating on the shielding plate 2, and enable the sundries to drop from the shielding plate 2, thereby prolonging the service time of the shielding plate 2. In addition, the shielding plate 2 is obliquely arranged relative to the horizontal plane, and air circulation is good at one end, which is far away from the box body 1, of the shielding plate 2, so that the shielding plate 2 has small influence on sunshade and air flow.

According to the electrical equipment 10 provided by the embodiment of the utility model, the shielding plate 2 is arranged above the box body 1, so that the box body 1 can be protected, the temperature of the box body 1 is prevented from being increased due to direct solar radiation of the box body 1, the durability of the shielding plate 2 is improved due to the fact that the shielding plate 2 is obliquely arranged relative to the horizontal plane, and possible faults caused by the fact that equipment is stressed greatly due to accumulation of sundries such as rain and snow are avoided due to the shielding plate 2.

In some embodiments, the distance between the shielding plate 2 and the case 1 is greater than zero, which means that the distance between any point on the shielding plate 2 and any point on the case 1 is greater than zero. It may also be pointed out that, in the vertical direction, the vertical distance between the case 1 and the shielding plate 2 is greater than zero, so as to avoid affecting the heat dissipation of the electrical components in the case. As shown in fig. 1, the distance between the P position of the shutter 2 and the case 1 is H1, H1 > 0, the distance between the Q position of the shutter 2 and the case 1 is greater than or equal to the distance between the P position of the shutter 2 and the case 1, and in fig. 1, the distance between the Q position of the shutter 2 and the case 1 is greater than the distance between the P position of the shutter 2 and the case 1, whereby the air flow at the Q position is better than at the P position, in the vertical direction, the P position of the shutter 2 is closest to the case 1. In some embodiments not shown in the figures, the distance between Q of shutter 2 and case 1 may be equal to the distance between P of shutter 2 and case 1, such that shutter 2 is parallel to the upper surface of case 1. The P part of the shielding plate 2 is separated from the box body 1, and the Q part of the shielding plate 2 is separated from the box body 1 by a fixed bracket 3.

The distance between the louver 2 and the case 1 is greater than 0, so that the louver 2 can eliminate the temperature rise of the case 1 caused by the solar radiation case 1 without affecting the convection heat dissipation of the air between the case 1 and the louver 2 and inside the case 1, thereby remarkably improving the heat dissipation condition of the electrical apparatus 10.

In some embodiments, the distance between the shielding plate 2 and the case 1 is not less than 500mm, that is, H1 is not less than 500mm, thereby enabling the air flow between the shielding plate 2 and the case 1 to be smoother. Alternatively, H1 may be 500mm, 510mm, 520mm, 530mm, or the like, and of course, H1 may be other values not less than 500mm while ensuring that the distance between the Q position of the shutter 2 and the case 1 is not less than H1, which is not listed.

In one example, the distance H1 between the case 1 and the P position of the shutter 2 is 500mm, and the distance between the case 1 and the Q position of the shutter 2 is 560mm.

In other embodiments, a portion of shutter 2 is in contact with case 2. For example, the distance h1=0 between the P position of the shutter 2 and the case 1, and the distance between the Q position of the shutter 2 and the case 1 is larger than the distance between the P position of the shutter 2 and the case 1. Thus, the fixing bracket 3 separates the shutter 2 from the case 1 at the Q position of the shutter 2, and the fixing bracket 3 is not provided between the P position of the shutter 2 and the case 1.

Alternatively, the reserved interface 123 may be manufactured during the production of the case 1, so that the cover 2 may be directly attached to the case 1 through the fixing bracket 3 at the outdoor site without the need for manufacturing the interface at the outdoor site.

Alternatively, the electrical device 10 may be a transformer, an inverter, or the like.

According to the electrical equipment 10 of the embodiment of the utility model, the distance between the shielding plate 2 and the case 1 is set to be larger than 0, so that the ventilation performance between the shielding plate 2 and the case 1 is good, and the arrangement of the shielding plate 2 can be ensured not to influence the air cooling heat dissipation of the case 1. Compared with the traditional awning, the electric equipment 10 provided by the embodiment of the utility model has the advantages that the integration level is high, the site foundation does not need to be additionally transformed, the construction time and the construction cost are saved, the box body 1 is reserved with the installation interface, and the site installation time is shortened.

In some embodiments of the present utility model, the shielding plate 2 is a flat plate, and a first included angle is formed between the shielding plate 2 and the horizontal plane, and the first included angle is not zero.

Optionally, the first included angle has a value ranging from 3 ° to 4 °. In other words, the first included angle is beta, and the value range of beta is 3 degrees less than or equal to beta and less than or equal to 4 degrees. The included angle between the whole shielding plate 2 and the horizontal plane is 3-4 degrees, so that the shielding plate 2 is ensured not to accumulate rain and snow.

In some embodiments of the present utility model, the upper surface of the shutter 2 is provided with at least one groove structure 21, and the groove structure 21 may enhance the strength of the shutter 2. One end of the groove structure 21 extends upward along the shutter 2, and the other end of the groove structure 21 extends downward along the shutter 2. As shown in fig. 3-4, one end of the slot structure 21 extends along the shutter 2 toward F2, and the other end of the slot structure 21 extends along the shutter 2 toward F1.

In some embodiments of the utility model, the other end of the channel structure 21 extends down along the shutter 2 and through to the edge of the shutter 2, thus facilitating the dropping of debris at the channel structure 21 from the edge of the shutter 2, e.g. during rainy and snowy weather, facilitating the dropping of rain and snow at the channel structure 21 from the edge of the shutter 2.

Wherein the groove structure 21 is recessed in the direction of the box body 1, namely, recessed downwards; and/or the groove structure 21 is recessed in a direction away from the case 1, i.e. recessed upwards. Specifically, the groove structures 21 may be all recessed downward, or may be all recessed upward, or alternatively, when the groove structures 21 are plural, a part of the groove structures 21 is recessed downward and another part of the groove structures 21 is recessed upward.

In some embodiments of the present utility model, the channel structure 21 is a linear channel, so that when debris slides down the channel structure 21, the channel structure 21 has less resistance to debris (e.g., rain or snow), which is beneficial for the debris to quickly fall off the shutter 2. The linear extending direction of the groove structure 21 has a second included angle with the horizontal plane, and the second included angle is equal to the first included angle. Referring to fig. 3 to 4, the groove structures 21 extend in the direction F1 to F2, and when the groove structures 21 are plural, the groove structures 21 are parallel to each other, which is advantageous in simplifying the process of manufacturing the groove structures 21.

In other embodiments, the slot structure 21 may be a curved slot or a zigzag slot, etc., and may also guide the sundries to fall from the shutter 2.

In some embodiments of the utility model, the shutters 2 extend outwardly beyond the housing 1 in the horizontal plane for better protection from solar radiation. Referring to fig. 1, in the horizontal plane, the dimension of the shield 2 extending leftwards and outwards beyond the case 1 is L1, and the dimension of the shield 2 extending rightwards and outwards beyond the case 1 is L2, L1 > 0, L2 > 0. L1 and L2 may be equal or unequal.

Optionally, the dimension of the shielding plate 2 which is protruded outwards from the case 1 is not less than 500mm, so as to further obtain better solar radiation protection capability. Referring to FIG. 1, L1 is 500mm or more and L2 is 500mm or more. Alternatively, L1 may be 500mm, 510mm, 520mm, 530mm, etc., L2 may be 500mm, 510mm, 520mm, 530mm, etc., and of course, L1, L2 may be other values not less than 500mm, which are not listed.

In some embodiments of the present utility model, case 1 has a case upper surface facing shutter 2, and reserve interface 123 is provided on the case upper surface. Like this, when installing sunshade 2, carry out the connection operation of fixed bolster 3 and box 1 from the top of box 1, simplified the installation step, and be favorable to reducing the materials of fixed bolster 3, save the cost.

The fixed support 3 and the reserved interface 123 can be connected through a bolt fastener, so that the sunshade assembly can be assembled on the box body 1 by connecting the sunshade plate 2 and the fixed support 3 into the sunshade assembly in advance and fixing the fixed support 3 on the reserved interface 123 through bolts on site.

In some embodiments of the present utility model, the fixing bracket 3 may include a bracket body 31 and a bracket arm 32, the bracket body 31 is connected with the shutter 2, the bracket arm 32 is connected with the bracket body 31, the reserved interfaces 123 are plural, the number of the bracket arms 32 is not more than the number of the reserved interfaces 123, and the bracket arm 32 is connected with the reserved interfaces 123 at corresponding positions through fasteners. The reserved interfaces 123 are multiple, so that the case 1 can be ensured to be compatible and adapt to different requirements of the shielding plates 2.

Specifically, the support arm 32 has a support plate 321, a support hole 322 is formed in the support plate 321, the box 1 includes a box body 11 and a support plate 12, the reserved interface 123 is disposed on the support plate 12, in some embodiments, as shown in fig. 6, the reserved interface 123 may be configured as a reserved mounting hole, and the fastener may be a bolt and a nut, where the bolt passes through the support hole 322 and the reserved mounting hole and then is screwed with the nut, so as to achieve connection between the support arm 32 and the box 1. In other embodiments, the reserved interface 123 may be configured as a reserved projection nut that is welded to the support plate 12 in advance, and the fastener is a bolt that passes through the bracket hole 322 and then is screwed to the projection nut to connect the bracket arm 32 to the case 1. When the shielding plate 2 is not needed, the shielding plate 2 and the fixed support 3 can be detached from the upper part of the box body 1 through the detaching fasteners, so that the operation is simple and convenient, and the structure of the box body 1 can not be damaged.

In some embodiments of the present utility model, referring to fig. 6, the support plate 12 includes a first plate 121 and a second plate 122, the first plate 121 is fixedly connected to a sidewall of the case body 11, the second plate 122 is connected to the first plate 121, the reserved interface 123 is provided on the second plate 122, and the first plate 121 and the second plate 122 may be constructed in an inverted "L" shape. When the fixing support 3 is connected with the box body 1, the support plate 321 is attached to the second plate 122, and the fastener passes through the support hole 322 and is fastened to the reserved interface 123.

In some embodiments not shown in the drawings, the reserved interface 123 may also be configured as an upwardly open interface, and the lower end of the fixing bracket 3 is plugged into the reserved interface 123 and the two are in interference fit, so as to realize connection between the fixing bracket 3 and the box 1.

The bracket body 31 and the bracket support arm 32 may be of steel rectangular tube structure. Alternatively, the bracket body 31 and the shielding plate 2 may be connected and fixed by a welding process, or may be connected and fixed by using the eye bolt 4, and the lifting device may integrally lift the fixing bracket 3 and the shielding plate 2 above the case 1 by lifting the eye bolt 4. When the electrical equipment 10 is assembled, the fixing bracket 3 and the shielding plate 2 can be fixed to form the sunshade assembly shown in fig. 3, and then the whole sunshade assembly is installed above the box body 1, so that the assembly step can be simplified, the connection operation of the shielding plate 2 and the fixing bracket 3 is not needed to be performed above the box body 1, and the assembly difficulty of the shielding plate 2 and the fixing bracket 3 is reduced.

In some embodiments of the present utility model, the shielding plate 2 is a metal plate, for example, the shielding plate 2 is a weather-resistant steel plate, and the weather-resistant steel plate has better atmospheric corrosion resistance, so that the shielding plate 2 has superior corrosion resistance, the probability of the shielding plate 2 being corroded by the atmosphere and rain and snow is reduced, and the shielding plate 2 is not easy to corrode even if the shielding plate 2 is used outdoors for a long time.

In some embodiments of the present utility model, shutter 2 is a plastic plate, so that shutter 2 is light in weight and does not place a large burden on case 1.

In some embodiments of the present utility model, the surface of the shielding plate 2 is provided with an anti-corrosion coating, so that the anti-corrosion performance of the shielding plate 2 can be further improved, which is beneficial to prolonging the service life of the shielding plate 2.

When the size of the case 1 is large, a plurality of shutters 2 may be provided, in the example shown in fig. 2, three shutters 2 are provided, the three shutters 2 being a first shutter 2a, a second shutter 2b, and a third shutter 2c, the first shutter 2a being installed above the case 1 by a first fixing bracket 3a, the second shutter 2b being installed above the case 1 by a second fixing bracket 3b, and the third shutter 2c being installed above the case 1 by a third fixing bracket 3 c. The adjacent two shields 2 are contacted to avoid the effect of sun shading due to gaps between the two shields 2.

According to the electrical equipment 10 provided by the embodiment of the utility model, through the structural optimization design, the shielding plate 2 can avoid the temperature rise caused by solar radiation of the box body 1 and can not influence the air cooling heat dissipation of electrical components in the box body 1.

A photovoltaic power generation system according to another embodiment of the present utility model includes the electrical apparatus 10 of the above embodiment.

The photovoltaic power generation system may also include a photovoltaic module electrically connected to the electrical device 10.

According to the photovoltaic power generation system provided by the embodiment of the utility model, the electric equipment 10 can protect the box body 1 by arranging the shielding plate 2 above the box body 1, so that the temperature of the box body 1 is prevented from being increased due to direct solar radiation of the box body 1, and the durability of the shielding plate 2 is improved by obliquely arranging the shielding plate 2 relative to the horizontal plane, so that possible faults caused by larger equipment stress due to accumulation of sundries such as rain, snow and the like of the shielding plate 2 are avoided.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may communicate with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. An electrical device, comprising:

the box body (1), a reserved interface (123) is arranged on the box body (1);

The shielding plate (2) is arranged above the box body (1);

The fixed support (3), one end of the fixed support (3) is connected with the shielding plate (2), and the other end of the fixed support (3) is suitable for being installed on the reserved interface (123);

The front projection of the box body (1) in the horizontal plane is positioned in the front projection of the shielding plate (2) in the horizontal plane, and the shielding plate (2) is obliquely arranged relative to the horizontal plane.

2. The electrical device according to claim 1, characterized in that the shutter (2) is a flat plate and that the shutter (2) has a first angle with the horizontal plane, which is not zero.

3. The electrical device according to claim 2, characterized in that the upper surface of the shutter (2) is provided with at least one groove structure (21), one end of the groove structure (21) extending upwards along the shutter (2), the other end of the groove structure (21) extending downwards along the shutter (2);

Wherein the groove structure (21) is recessed towards the direction of the box body (1); and/or the groove structure (21) is recessed in a direction away from the housing (1).

4. The electrical device according to claim 1, characterized in that a portion of the shutter (2) is in contact with the case (1).

5. Electrical apparatus according to claim 1, characterized in that the distance between the shutter (2) and the tank (1) is greater than zero, the shutter (2) being separated from the tank (1) by the fixing bracket (3).

6. The electrical device according to claim 1, characterized in that the shutter (2) extends outwards beyond the housing (1) in a horizontal plane.

7. The electrical device according to claim 1, wherein the housing (1) has a housing upper surface facing the shutter (2), the reserved interface (123) being open at the housing upper surface.

8. The electrical device according to claim 1 or 7, wherein the fixing bracket (3) comprises a bracket body (31) and a bracket support arm (32), the bracket body (31) is connected with the shielding plate (2), the bracket support arm (32) is connected with the bracket body (31), the reserved interfaces (123) are plural, the number of the bracket support arms (32) is not more than the number of the reserved interfaces (123), and the bracket support arm (32) is connected with the reserved interfaces (123) at corresponding positions through fasteners.

9. Electrical device according to claim 1, characterized in that the surface of the shutter (2) is provided with an anti-corrosion coating.

10. A photovoltaic power generation system comprising the electrical device of any one of claims 1-9.