Distributed photovoltaic grid-connected box with dustproof function

Abstract

The invention discloses a distributed photovoltaic grid-connected box with a dustproof function, the photovoltaic grid-connected box comprises a box cover, a box body, a feedback mechanism, a drainage mechanism, a cooling mechanism, a rain cap mechanism and an electric appliance assembly, the box body comprises an inner shell and an outer shell, the outer shell is provided with a water pipe hole, the box cover is hinged to the outer shell, and the feedback mechanism comprises a servo cylinder. The feedback mechanism is fixedly connected with the inner shell, the outer shell and the drainage mechanism, the drainage mechanism makes contact with the inner shell and the outer shell, the cooling mechanism comprises a circulating pipe, the circulating pipe is fixedly connected with a water pipe hole, the drainage mechanism is slidably connected with the cooling mechanism, the rain cap mechanism is fixedly connected with the inner shell, the outer shell and the drainage mechanism, and the servo air cylinder is connected with the electric appliance assembly through electric signals. The invention relates to the technical field of photovoltaic grid-connected boxes, on the basis of protecting electrical elements, working modes can be switched according to weather and heating conditions of electrical appliances, the electrical appliances can be reasonably ventilated and independently sealed to prevent dust from entering, and rainwater is fully utilized for self-cleaning and heat dissipation of the electrical appliances.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic grid-connected boxes, and in particular to a distributed photovoltaic grid-connected box with a dustproof function. Background Art

[0002] Distributed photovoltaic refers to decentralized small-scale photovoltaic power generation systems, such as solar panels installed on the roofs of homes or factories. The supporting distributed photovoltaic grid-connected boxes are key equipment that integrate power conversion, protection, monitoring and communication functions. Their role is to ensure that the photovoltaic system is safely and efficiently connected to the power grid and strictly abide by relevant standards and specifications.

[0003] In existing distributed photovoltaic systems, many functions are mostly realized by core components. For the external box, it is often only required to have corrosion resistance and anti-aging properties, and the structural design is neglected. In fact, by optimizing the external box and providing good ventilation and heat dissipation conditions for the internal core electrical appliances, the service life of the core electronic components can be effectively extended. At the same time, the design of the external box needs to focus on dust prevention to prevent dust from entering the interior and avoid poor contact or short circuit of the core electronic components due to dust, which in turn causes safety hazards. Summary of the invention

[0004] The purpose of the present invention is to provide a distributed photovoltaic grid-connected box with a dustproof function to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a distributed photovoltaic grid-connected box with dustproof function includes a box cover, a box body, a feedback mechanism, a drainage mechanism, a cooling mechanism, a rain cap mechanism and an electrical assembly, the box body includes an inner shell and an outer shell, the outer shell is provided with a water pipe hole, the box cover is hinged to the outer shell, the feedback mechanism includes a servo cylinder, the feedback mechanism is fixedly connected to the inner shell, the outer shell and the drainage mechanism, the drainage mechanism is in contact with the inner shell and the outer shell, the cooling mechanism includes a circulation pipe, the circulation pipe is fixedly connected to the water pipe hole, the drainage mechanism is slidably connected to the cooling mechanism, the rain cap mechanism is fixedly connected to the inner shell, the outer shell and the drainage mechanism, and the servo cylinder is connected to the electrical assembly through an electrical signal.

[0006] The present invention is a grid-connected box for protecting core electrical components. It is mainly arranged in a circuit system and is used to connect the distributed power to the public power grid. Its main function is to protect the electrical assembly in the box. In the present invention, the electrical assembly is protected in the inner shell through the independent design of the inner shell and the outer shell of the box. The present invention can independently disconnect the inner shell and the outer shell to switch the sealing mode to prevent dust from entering the electrical assembly and causing poor contact. The liquid level sensor detects the amount of rain in the weather, the servo cylinder identifies the heating condition of the electrical assembly, and the feedback mechanism adjusts the drainage mechanism and the rain cap according to the different electrical signals. Mechanism, on sunny days, the inner shell and the outer shell are connected to switch the ventilation mode, and the electrical assembly is ventilated to prevent overheating. On rainy days with little precipitation, it can be switched to a small-displacement drainage mode according to the heating condition of the electrical assembly when the electrical assembly is not overheated, and the rainwater is discharged from the side wall of the outer shell, and the dust is cleaned at the same time. When the electrical assembly is overheated, it is switched to a cooling mode, and the rainwater is collected and enters the cooling mechanism to exchange heat and cool the inner shell. On rainy days with heavy precipitation, the electrical assembly does not overheat and switches to a sealing mode. When the electrical assembly is overheated and needs water cooling, it is switched to a large-displacement drainage mode, and the rainwater enters the inner and outer shells for heat exchange and is discharged.

[0007] Furthermore, the box body also includes a waterproof joint, the inner shell and the outer shell and the waterproof joint are all fixedly connected, the inner shell is provided with an inward-inclined hole, and the outer shell is also provided with an outward-inclined hole and a drainage groove, the inward-inclined holes and the outward-inclined holes are each provided with a plurality of groups, and the plurality of groups of inward-inclined holes and the outward-inclined holes are evenly distributed in a rectangular array, the feedback mechanism also includes a partition, and two groups of drainage grooves are provided, the two groups of drainage grooves are arranged at the bottom of both sides of the outer shell, and the drainage groove is arranged above the partition, the partition is fixedly connected to the inner shell and the outer shell, and the servo cylinder is fixedly connected to the inner shell.

[0008] The electrical assembly circuit installed in the box is connected through the waterproof joint at the bottom. On sunny days, the feedback mechanism adjusts the drainage mechanism according to the electrical signal, and the drainage mechanism connects the inward-inclined hole and the outward-inclined hole to switch the ventilation mode. The electrical assembly is ventilated to prevent overheating. On rainy days with heavy precipitation, when the electrical assembly overheats and needs to be cooled, the large-displacement drainage mode is switched, and rainwater enters the inner shell and the outer shell, falls on the partition, exchanges heat, and then flows out through the drainage groove.

[0009] Furthermore, the feedback mechanism also includes a connecting rod, an assembly plate and a liquid level sensor. The partition is provided with a through hole, which is slidingly connected to the output end of the servo cylinder and the connecting rod. The assembly plate is fixedly connected to the output end of the servo cylinder and the connecting rod. The servo cylinder is connected to the liquid level sensor through an electrical signal. The drainage mechanism is provided with two groups, and the two groups of drainage mechanisms are arranged on both sides of the inner shell. The drainage mechanism includes a frame and a liquid retaining frame. The frame is fixedly connected to the output end of the servo cylinder and the connecting rod. The liquid retaining frame is fixedly connected to the partition. There are several groups of liquid retaining frames, and the several groups of liquid retaining frames are linearly evenly distributed along the partition.

[0010] The amount of precipitation on rainy days is identified by the liquid level sensor installed on the partition. The liquid level sensor converts the precipitation into an electrical signal and sends it to the servo cylinder. The temperature sensor is integrated in the electrical assembly. When the electrical assembly is overheated, it sends an electrical signal to the servo cylinder. According to the electrical signal of the precipitation and the heating condition of the electrical assembly, the displacement of the output end of the servo cylinder is adjusted. The output end of the servo cylinder is connected to the connecting rod through the assembly plate. The output end of the servo cylinder pushes the frames on both sides to slide between the inner shell and the outer shell to switch the working mode.

[0011] Furthermore, the drainage mechanism also includes side diverters and main diverters. The side diverters and the main diverters are each provided with several groups. Several groups of side diverters are linearly evenly distributed along the edge line of the frame. Several groups of main diverters are evenly distributed along the rectangular array of the inner shell side wall. The side diverters and the main diverter are fixedly connected to the frame. The liquid retaining frame is provided with protrusions and through grooves. The side diverters and the main diverter are in contact with the inner shell, the outer shell and the protrusions. Several groups of protrusions and through grooves are each provided with several groups. Several groups of protrusions and through grooves are linearly evenly distributed along the liquid retaining frame. The rain hat mechanism includes an inner umbrella, and the inner umbrella is fixedly connected to the frame.

[0012] The output end of the servo cylinder is used to push the frames on both sides to slide between the inner shell and the outer shell to switch the working mode. Several side diverters and the main diverter are evenly distributed in the frame corresponding to several inwardly inclined holes and outwardly inclined holes. When sealing, the side diverter and the main diverter body are in contact with the inwardly inclined holes and outwardly inclined holes, and the inwardly inclined holes and outwardly inclined holes are connected through the side diverter and the main diverter body. When the electrical assembly overheats and needs to be cooled down due to heavy rainfall on rainy days, the output end of the servo cylinder pushes the frame so that the protrusions no longer seal the side diverters and the main diverter, and the rainwater falls on the partition through the through groove for heat exchange and is discharged through the drainage groove.

[0013] Furthermore, the side diverter is provided with an oblique through pipe, a turning pipe, a vertical groove and a side hole. The oblique through pipe is arranged below the turning pipe. Two groups of vertical grooves are provided. The two groups of vertical grooves are arranged on both sides of the turning pipe. The side hole is connected with the vertical groove on the side away from the main diverter. The side diverter and the main diverter have the same virtual features except for the side hole. The cooling mechanism of the main diverter also includes a baffle, which is slidably connected to the side diverter.

[0014] On sunny days, the output end of the servo cylinder pushes the frame, and the inclined through pipe connects the inwardly inclined hole and the outwardly inclined hole to switch the ventilation mode, and the electrical assembly is ventilated to prevent overheating. On rainy days with little precipitation, the small-displacement drainage mode can be switched according to the heating condition of the electrical assembly. When the electrical assembly is not overheated, the turning pipe contacts the outwardly inclined hole, and rainwater enters between the inner shell and the outer shell. Most of it is discharged through the outwardly inclined hole through the turning pipe. At the same time, the dust in the outwardly inclined hole is cleaned. At this time, the vertical groove contacts the protrusion seal. When the electrical assembly overheats, it switches to the large-displacement drainage mode, and the side diverter is connected to the inwardly inclined hole and the outwardly inclined hole of the main diverter body. The protrusion no longer contacts the sealed vertical groove. The rainwater falls on the partition through the vertical groove and the through groove for heat exchange and is discharged through the drainage groove.

[0015] Furthermore, the cooling mechanism also includes a liquid collecting pipe, and the baffle plate and the liquid collecting pipe are each provided with two groups, and the two groups of baffle plates and liquid collecting pipes are both arranged on both sides of the circulation pipe, and the baffle plate is provided with liquid collecting holes, and the liquid collecting holes are provided with several groups, and the several groups of liquid collecting holes are linearly evenly distributed along the baffle plate, and the liquid collecting pipe is connected with the liquid collecting holes and the circulation pipe.

[0016] On rainy days with little precipitation, when the electrical assembly overheats, the cooling mode is switched, and the servo cylinder pushes the side diverter to connect with the inward and outward holes of the main diverter body partition. The protrusion contacts the sealed vertical groove, and rainwater enters between the inner shell and the outer shell. Part of it falls to the upper surface of the side diverter, and is connected to the liquid collecting hole through the vertical groove on the side of the side diverter away from the main diverter. It is collected by the liquid collecting pipe and enters the circulation pipe and the back of the inner shell for heat exchange and cooling. Part of it is discharged through the drainage groove after heat exchange on the partition.

[0017] Furthermore, the rain hat mechanism also includes a cap cover, which is fixedly connected to the inner shell and the outer shell, and is provided with a rain leakage hole on the cap cover, and a convex column and a grille on the inner umbrella. The rain leakage holes, the convex columns and the grille are provided in several groups, and the several groups of rain leakage holes and the convex columns are evenly distributed in an array, and the several groups of grilles are evenly distributed along the inner umbrella linearly, and the cap cover is slidably connected to the inner umbrella.

[0018] In ventilation mode and sealing mode on sunny days, the servo cylinder pushes the frame, driving the inner umbrella to move towards the cap, and the convex column contacts the sealed rain leakage hole to prevent dust from entering the inner shell and the outer shell through the rain leakage hole. In small-displacement drainage mode, large-displacement drainage mode and cooling mode on rainy days, the servo cylinder pulls the frame, driving the inner umbrella to move away from the cap, and the convex column no longer contacts the sealed rain leakage hole, allowing rainwater to enter the inner shell and the outer shell through the rain leakage hole.

[0019] As further shown, the photovoltaic grid-connected box has five working modes:

[0020] Sealing mode: The convex column is in contact with the rain leakage hole, and the liquid collecting hole, the inward-inclined hole and the outward-inclined hole are all in contact with the main body of the side diverter;

[0021] Ventilation mode: the convex column contacts the rain leakage hole, the liquid collecting hole contacts the side diverter body, the inward-inclined hole and the outward-inclined hole both contact the inclined through pipe, and the vertical groove contacts the convex block;

[0022] Small-displacement drainage mode: the convex column does not contact the rain leakage hole, the liquid collecting hole and the inward-inclined hole are in contact with the side diverter body, the outward-inclined hole is in contact with the turning pipe, and the vertical groove is in contact with the convex block;

[0023] Large-displacement drainage mode: the convex column does not contact the rain leakage hole, the liquid collecting hole, the outward-inclined hole and the inward-inclined hole are all in contact with the side diverter body, and the vertical groove does not contact the convex block;

[0024] Cooling mode: the convex column does not contact the rain leakage hole, the inwardly inclined hole and the outwardly inclined hole are in contact with the side diverter body, the vertical groove is in contact with the convex block, the liquid collecting hole is in contact with the side hole, and the vertical groove is in contact with the convex block.

[0025] The sealing mode working condition is that the output end of the servo cylinder pushes the frame, at which time the side diverter and the bottom of the main diverter body contact the liquid collecting hole, the inwardly inclined hole, and the outwardly inclined hole, the inner umbrella is close to the cap, the convex column contacts the sealed rain leakage hole, and the inner shell and the outer shell are separated to prevent dust from entering the inner shell from the inwardly inclined hole, the outwardly inclined hole, and the rain leakage hole; the ventilation mode working condition is that the output end of the servo cylinder pulls the frame to move toward the direction close to the partition, the inclined through pipe connects the inwardly inclined hole and the outwardly inclined hole to switch the ventilation mode, and the electrical assembly is ventilated to prevent overheating; the small-displacement drainage mode working condition is that the output end of the servo cylinder pulls the frame to continue to move one position toward the direction close to the partition, the convex column no longer contacts the sealed rain leakage hole, rainwater enters between the inner shell and the outer shell from the rain leakage hole, the turning pipe contacts the outwardly inclined hole, and part of the rainwater passes into the outer shell through the turning pipe The inclined hole is discharged, and the dust in the outward inclined hole is cleaned at the same time. At this time, the vertical groove contacts the convex block seal; the working condition of the large-displacement drainage mode is that the frame continues to move one position toward the direction close to the partition, the convex column does not contact the sealed rain leakage hole, the side diverter is connected with the inward inclined hole and the outward inclined hole of the main diverter body partition, the convex block no longer contacts the sealed vertical groove, the rainwater falls on the partition through the vertical groove and the through groove, and then is discharged through the drainage groove; the working condition of the cooling mode is that the frame continues to move one position toward the direction close to the partition, the convex column does not contact the sealed rain leakage hole, the rainwater enters the inner shell and the outer shell, part of it falls to the upper surface of the side diverter, and is connected to the liquid collecting hole through the vertical groove on the side of the side diverter away from the main diverter, and is collected by the liquid collecting pipe and enters the circulation pipe and the back of the inner shell for heat exchange and cooling, and part of it is discharged through the drainage groove after heat exchange on the partition.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention designs a feedback mechanism, which identifies the amount of precipitation on rainy days through a liquid level sensor, and the liquid level sensor converts the amount of precipitation into an electrical signal and sends it to the servo cylinder. A temperature sensor is integrated in the electrical assembly, and the displacement of the output end of the servo cylinder is adjusted according to the electrical signal of the precipitation and the heating condition of the electrical assembly, so as to push the two side frames to slide between the inner shell and the outer shell, and switch the working mode; the present invention designs a drainage mechanism and a cooling mechanism, and provides five working modes through the cooperation of the two. The sealing mode working condition is that the side diverter contacts the liquid collecting hole, the inwardly inclined hole, and the outwardly inclined hole with the bottom of the main diverter body, and the inner shell is separated from the outer shell to prevent dust from entering the inner shell from the inwardly inclined hole, the outwardly inclined hole, and the rain leakage hole, resulting in poor contact; on sunny days, it is in ventilation mode, the inclined through pipe connects the inwardly inclined hole and the outwardly inclined hole, and the electrical assembly is ventilated and prevented from leaking. Prevent overheating; on rainy days with small precipitation, according to the heating condition of the electrical assembly, when the electrical assembly is not overheated, switch to a small displacement drainage mode, rainwater enters the inner shell and the outer shell from the leaking hole, the turning pipe contacts the outward hole, part of the rainwater is discharged through the turning pipe into the outward hole, and the dust in the outward hole is cleaned at the same time. When the electrical assembly is overheated, switch to a cooling mode, collect rainwater and enter the cooling mechanism, and heat exchange and cool the inner shell. On rainy days with large precipitation, the electrical assembly is not overheated, and the sealing mode is switched. When the electrical assembly is overheated and water cooling is required, switch to a large displacement drainage mode, and rainwater enters the inner shell and the outer shell for heat exchange and then is discharged; on the basis of protecting electrical components, the present invention can switch working modes according to weather and electrical heating conditions, reasonably ventilate the electrical appliances, and can be independently sealed to prevent dust from entering the electrical appliances, which is highly intelligent. It has wide applicability and makes full use of rainwater for self-cleaning of heat dissipation holes and heat dissipation of electrical appliances. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a general partial cross-sectional view of the present invention;

[0029] Figure 3 It is a schematic diagram of the feedback mechanism structure of the present invention;

[0030] Figure 4 It is a schematic diagram of the drainage mechanism structure of the present invention;

[0031] Figure 5 It is a partial cross-sectional view of the drainage mechanism of the present invention;

[0032] Figure 6 It is a partial cross-sectional view of the side flow divider of the present invention;

[0033] Figure 7 for Figure 6 A schematic diagram of a local A enlargement;

[0034] Figure 8 It is a schematic diagram of the cooling mechanism structure of the present invention;

[0035] Fig. 9 A partial cross-sectional view of the cooling mechanism of the present invention;

[0036] Fig.10 for Fig. 9 A partial enlarged schematic diagram of B;

[0037] Fig.11 It is a schematic diagram of the structure of the rain cap mechanism of the present invention.

[0038] In the figure: 1, box cover; 2, box body; 21, inner shell; 211, inward hole; 22, outer shell; 221, outward hole; 222, drainage groove; 223, water pipe hole; 23, waterproof joint; 3, feedback mechanism; 31, servo cylinder; 32, partition; 321, through hole; 33, connecting rod; 34, assembly plate; 35, liquid level sensor; 4, drainage mechanism; 41, frame; 42, liquid retaining frame; 421, Bump; 422, through groove; 43, side diverter; 431, oblique through pipe; 432, turning pipe; 433, vertical groove; 434, side hole; 44, main diverter; 5, cooling mechanism; 51, baffle; 511, liquid collecting hole; 52, liquid collecting pipe; 53, circulation pipe; 6, rain cap mechanism; 61, cap cover; 611, rain leakage hole; 62, inner umbrella; 621, convex column; 622, grille; 7, electrical assembly. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] like Figure 1 , Figure 2 As shown, the present invention provides a technical solution for distributed photovoltaic grid-connected with dustproof function, including a box cover 1, a box body 2, a feedback mechanism 3, a drainage mechanism 4, a cooling mechanism 5, a rain cap mechanism 6 and an electrical assembly 7. The box body 2 includes an inner shell 21 and an outer shell 22, and the outer shell 22 is provided with a water pipe hole 223. The box cover 1 is hinged to the outer shell 22. The feedback mechanism 3 includes a servo cylinder 31. The feedback mechanism 3 is fixedly connected to the inner shell 21, the outer shell 22 and the drainage mechanism 4. The drainage mechanism 4 is in contact with the inner shell 21 and the outer shell 22. The cooling mechanism 5 includes a circulation pipe 53, the circulation pipe 53 is fixedly connected to the water pipe hole 223, the drainage mechanism 4 is slidably connected to the cooling mechanism 5, the rain cap mechanism 6 is fixedly connected to the inner shell 21, the outer shell 22 and the drainage mechanism 4, and the servo cylinder 31 is connected to the electrical assembly 7 through an electrical signal.

[0041] The present invention is a grid-connected box for protecting core electrical components, which is mainly arranged in a circuit system and is used to connect the distributed power to the public power grid. Its main function is to protect the electrical assembly 7 in the box body 2. In the present invention, the inner shell 21 and the outer shell 22 of the box body 2 are independently designed, and the electrical assembly 7 is protected in the inner shell 21. The present invention can independently disconnect the inner shell 21 and the outer shell 22 to switch the sealing mode to prevent dust from entering the electrical assembly 7 and causing poor contact. The liquid level sensor 35 detects the amount of rain in the weather, the servo cylinder 31 identifies the heating condition of the electrical assembly 7, and the feedback mechanism 3 adjusts the drainage mechanism 4 and the rain according to the different electrical signals. Cap mechanism 6, on sunny days, the inner shell 21 and the outer shell 22 are connected to switch the ventilation mode, and the electrical assembly 7 is ventilated to prevent overheating. On rainy days with little precipitation, it can be based on the heating condition of the electrical assembly 7. When the electrical assembly 7 is not overheated, switch to a small-displacement drainage mode to discharge rainwater from the side wall of the outer shell 22 and clean dust at the same time. When the electrical assembly 7 is overheated, switch to a cooling mode to collect rainwater and enter the cooling mechanism 5 to exchange heat and cool the inner shell 21. On rainy days with heavy precipitation, the electrical assembly 7 is not overheated and switches to a sealing mode. When the electrical assembly 7 is overheated and needs water cooling, switch to a large-displacement drainage mode, and rainwater enters the inner shell 21 and the outer shell 22 for heat exchange and then is discharged.

[0042] like Figure 2 , Figure 3 As shown, the box body 2 also includes a waterproof joint 23, the inner shell 21 is fixedly connected to the outer shell 22 and the waterproof joint 23, the inner shell 21 is provided with an inwardly inclined hole 211, and the outer shell 22 is also provided with an outwardly inclined hole 221 and a drainage groove 222, the inwardly inclined hole 211 and the outwardly inclined hole 221 are each provided with a plurality of groups, and the plurality of groups of inwardly inclined holes 211 and the outwardly inclined holes 221 are uniformly distributed in a rectangular array, the feedback mechanism 3 also includes a partition 32, and the drainage groove 222 is provided with two groups, and the two groups of drainage grooves 222 are arranged at the bottom of both sides of the outer shell 22, and the drainage groove 222 is arranged above the partition 32, the partition 32 is fixedly connected to the inner shell 21 and the outer shell 22, and the servo cylinder 31 is fixedly connected to the inner shell 21.

[0043] The circuit of the electrical assembly 7 assembled in the box body 2 is connected through the waterproof joint 23 at the bottom. On sunny days, the feedback mechanism 3 adjusts the drainage mechanism 4 according to the electrical signal. The drainage mechanism 4 connects the inward-inclined hole 211 and the outward-inclined hole 221 to switch the ventilation mode. The electrical assembly 7 is ventilated to prevent overheating. On rainy days with heavy precipitation, when the electrical assembly 7 overheats and needs to be cooled, the large-displacement drainage mode is switched, and rainwater enters the inner shell 21 and the outer shell 22 and falls on the partition 32 for heat exchange and then passes out through the drainage groove 222.

[0044] like Figure 3 , Figure 4As shown, the feedback mechanism 3 also includes a connecting rod 33, an assembly plate 34 and a liquid level sensor 35. A through hole 321 is provided on the partition 32. The through hole 321 is slidably connected to the output end of the servo cylinder 31 and the connecting rod 33. The assembly plate 34 is fixedly connected to the output end of the servo cylinder 31 and the connecting rod 33. The servo cylinder 31 is connected to the liquid level sensor 35 through an electrical signal. The drainage mechanism 4 is provided with two groups. The two groups of drainage mechanisms 4 are arranged on both sides of the inner shell 21. The drainage mechanism 4 includes a frame 41 and a liquid retaining frame 42. The frame 41 is fixedly connected to the output end of the servo cylinder 31 and the connecting rod 33. The liquid retaining frame 42 is fixedly connected to the partition 32. The liquid retaining frame 42 is provided with a plurality of groups, and the plurality of groups of liquid retaining frames 42 are linearly evenly distributed along the partition 32.

[0045] The amount of precipitation on rainy days is identified by the liquid level sensor 35 installed on the partition 32. The liquid level sensor 35 converts the precipitation into an electrical signal and sends it to the servo cylinder 31. The temperature sensor is integrated in the electrical assembly 7. When the electrical assembly 7 is overheated, an electrical signal is sent to the servo cylinder 31. The displacement of the output end of the servo cylinder 31 is adjusted according to the electrical signal of the precipitation and the heating condition of the electrical assembly 7. The output end of the servo cylinder 31 is connected to the connecting rod 33 through the assembly plate 34. The output end of the servo cylinder 31 pushes the two side frames 41 to slide between the inner shell 21 and the outer shell 22 to switch the working mode.

[0046] like Figure 4 , Figure 5 , Fig.11 As shown, the drainage mechanism 4 also includes a side diverter 43 and a main diverter 44. The side diverter 43 and the main diverter 44 are each provided with a plurality of groups. The plurality of groups of side diverters 43 are linearly evenly distributed along the edge line of the frame 41. The plurality of groups of main diverters 44 are evenly distributed along the rectangular array of the side wall of the inner shell 21. The side diverter 43 and the main diverter 44 are fixedly connected to the frame 41. A protrusion 421 and a through groove 422 are provided on the liquid retaining frame 42. The side diverter 43 and the main diverter 44 are in contact with the inner shell 21, the outer shell 22 and the protrusion 421. The protrusion 421 and the through groove 422 are each provided with a plurality of groups. The plurality of groups of protrusions 421 and the through groove 422 are linearly evenly distributed along the liquid retaining frame 42. The rain cap mechanism 6 includes an inner umbrella 62, and the inner umbrella 62 is fixedly connected to the frame 41.

[0047] The output end of the servo cylinder 31 pushes the two side frames 41 to slide between the inner shell 21 and the outer shell 22 to switch the working mode. A number of side diverter pieces 43 and the main diverter piece 44 are evenly distributed in the frame 41 corresponding to a number of inwardly inclined holes 211 and outwardly inclined holes 221. When sealing, the side diverter pieces 43 and the main diverter piece 44 body are in contact with the inwardly inclined holes 211 and the outwardly inclined holes 221, and the inwardly inclined holes 211 and the outwardly inclined holes 221 are connected through the side diverter pieces 43 and the main diverter piece 44 body. When the electrical assembly 7 overheats and needs to be cooled down due to heavy rainfall on rainy days, the output end of the servo cylinder 31 pushes the frame 41 so that the protrusion 421 no longer seals the side diverter piece 43 and the main diverter piece 44, and the rainwater falls on the partition 32 through the through groove 422 for heat exchange and is discharged through the drainage groove 222.

[0048] like Figure 6 , Figure 7 As shown, the side diverter 43 is provided with an oblique pipe 431, a turning pipe 432, a vertical groove 433 and a side hole 434. The oblique pipe 431 is arranged below the turning pipe 432. There are two groups of vertical grooves 433. The two groups of vertical grooves 433 are arranged on both sides of the turning pipe 432. The side hole 434 is connected with the vertical groove 433 on the side away from the main diverter 44. The side diverter 43 and the main diverter 44 have the same virtual features except for the side hole 434. The cooling mechanism 5 of the main diverter 44 also includes a baffle 51, and the baffle 51 is slidably connected to the side diverter 43.

[0049] On sunny days, the output end of the servo cylinder 31 pushes the frame 41, and the inclined through pipe 431 connects the inwardly inclined hole 211 and the outwardly inclined hole 221 to switch the ventilation mode, and the electrical assembly 7 is ventilated to prevent overheating. On rainy days with little precipitation, the electrical assembly 7 can be switched to a small-displacement drainage mode according to the heating condition of the electrical assembly 7. When the electrical assembly 7 is not overheated, the turning pipe 432 contacts the outwardly inclined hole 221, and rainwater enters between the inner shell 21 and the outer shell 22. Most of it passes through the turning pipe 432 into the outwardly inclined hole 221 for discharge, and at the same time, the dust in the outwardly inclined hole 221 is cleaned. At this time, the vertical groove 433 contacts the protrusion 421 for sealing. When the electrical assembly 7 is overheated, it switches to a large-displacement drainage mode, and the side diverter 43 is connected to the main body of the main diverter 44 to block the inwardly inclined hole 211 and the outwardly inclined hole 221. The protrusion 421 no longer contacts the sealed vertical groove 433. The rainwater falls on the partition 32 through the vertical groove 433 and the through groove 422 for heat exchange and is discharged through the drainage groove 222.

[0050] like Figure 8 , Fig. 9 , Fig.10 As shown, the cooling mechanism 5 also includes a liquid collecting pipe 52. The baffle plate 51 and the liquid collecting pipe 52 are each provided with two groups. The two groups of baffle plates 51 and the liquid collecting pipe 52 are both provided on both sides of the circulation pipe 53. The baffle plate 51 is provided with a liquid collecting hole 511. The liquid collecting hole 511 is provided with a plurality of groups. The plurality of groups of liquid collecting holes 511 are linearly evenly distributed along the baffle plate 51. The liquid collecting pipe 52 is connected with the liquid collecting hole 511 and the circulation pipe 53.

[0051] On rainy days with little precipitation, when the electrical assembly 7 is overheated, the cooling mode is switched, and the servo cylinder 31 pushes the side diverter 43 to connect with the inwardly inclined hole 211 and the outwardly inclined hole 221 of the main diverter 44 body partition, and the protrusion 421 contacts the sealed vertical groove 433. Rainwater enters between the inner shell 21 and the outer shell 22, and part of it falls to the upper surface of the side diverter 43, and is connected to the liquid collecting hole 511 through the vertical groove 433 on the side of the side diverter 43 away from the main diverter 44, and is collected by the liquid collecting pipe 52 and enters the circulation pipe 53 to exchange heat with the back of the inner shell 21 for cooling, and part of it is discharged through the drainage groove 222 after heat exchange on the partition 32.

[0052] like Fig.11 As shown, the rain hat mechanism 6 also includes a cap 61, which is fixedly connected to the inner shell 21 and the outer shell 22. The cap 61 is provided with a rain leakage hole 611, and the inner umbrella 62 is provided with a convex column 621 and a grille 622. The rain leakage hole 611, the convex column 621 and the grille 622 are each provided with a plurality of groups, and the plurality of groups of rain leakage holes 611 and the convex column 621 are evenly distributed in an array, and the plurality of groups of grilles 622 are evenly distributed along the inner umbrella 62 linearly, and the cap 61 is slidably connected to the inner umbrella 62.

[0053] In the ventilation mode and sealing mode on sunny days, the servo cylinder 31 pushes the frame 41, driving the inner umbrella 62 to move toward the cap 61, and the boss 621 contacts the sealed rain leakage hole 611 to prevent dust from entering the inner shell 21 and the outer shell 22 through the rain leakage hole 611. In the small-displacement drainage mode, large-displacement drainage mode and cooling mode on rainy days, the servo cylinder 31 pulls the frame 41, driving the inner umbrella 62 to move away from the cap 61, and the boss 621 no longer contacts the sealed rain leakage hole 611, and rainwater enters the inner shell 21 and the outer shell 22 through the rain leakage hole 611.

[0054] like Figure 5 , Fig. 9 , Fig.10 As shown, the photovoltaic grid-connected box has five working modes:

[0055] Sealing mode: the protruding column 621 is in contact with the rain leakage hole 611, and the liquid collecting hole 511, the inwardly inclined hole 211, and the outwardly inclined hole 221 are all in contact with the main body of the side diverter 43;

[0056] Ventilation mode: the convex column 621 contacts the rain leakage hole 611, the liquid collecting hole 511 contacts the main body of the side diverter 43, the inwardly inclined hole 211 and the outwardly inclined hole 221 both contact the inclined through pipe 431, and the vertical groove 433 contacts the convex block 421;

[0057] Small-displacement drainage mode: the convex column 621 is not in contact with the rain leakage hole 611, the liquid collecting hole 511 and the inward-inclined hole 211 are in contact with the main body of the side diverter 43, the outward-inclined hole 221 is in contact with the turning pipe 432, and the vertical groove 433 is in contact with the convex block 421;

[0058] Large-displacement drainage mode: the convex column 621 does not contact the rain leakage hole 611, the liquid collecting hole 511, the outward-inclined hole 221, and the inward-inclined hole 211 are all in contact with the main body of the side diverter 43, and the vertical groove 433 does not contact the convex block 421;

[0059] Cooling mode: the convex column 621 is not in contact with the rain leakage hole 611 , the inwardly inclined hole 211 and the outwardly inclined hole 221 are in contact with the main body of the side diverter 43 , the vertical groove 433 is in contact with the convex block 421 , the liquid collecting hole 511 is in contact with the side hole 434 , and the vertical groove 433 is in contact with the convex block 421 .

[0060] The sealing mode working condition is that the output end of the servo cylinder 31 pushes the frame 41. At this time, the side diverter 43 and the bottom of the main diverter 44 body contact the liquid collecting hole 511, the inwardly inclined hole 211, and the outwardly inclined hole 221. The inner umbrella 62 is close to the cap 61, and the protruding column 621 contacts the sealed leaking hole 611. The inner shell 21 and the outer shell 22 are separated to prevent dust from entering the inner shell 21 through the inwardly inclined hole 211, the outwardly inclined hole 221, and the leaking hole 611. The ventilation mode working condition is that the output end of the servo cylinder 31 pulls the frame 41 to As it moves toward the partition 32, the inclined pipe 431 connects the inwardly inclined hole 211 and the outwardly inclined hole 221 to switch the ventilation mode, and the electrical assembly 7 is ventilated to prevent overheating; the working condition of the small displacement drainage mode is that the output end of the servo cylinder 31 pulls the frame 41 to continue to move one position toward the partition 32, the protruding column 621 no longer contacts the sealed leaking hole 611, and rainwater enters between the inner shell 21 and the outer shell 22 from the leaking hole 611, and the turning pipe 432 contacts the outwardly inclined hole 221, and part of the rainwater passes through the turning pipe 432 into the outer shell The inclined hole 221 is discharged, and the dust in the outward inclined hole 221 is cleaned at the same time. At this time, the vertical groove 433 contacts the protrusion 421 for sealing; the large-displacement drainage mode working condition is that the frame 41 continues to move one position toward the partition 32, the protrusion 621 does not contact the sealed leaking hole 611, the side diverter 43 is connected to the main body of the main diverter 44 to separate the inward inclined hole 211 and the outward inclined hole 221, the protrusion 421 no longer contacts the sealed vertical groove 433, and the rainwater falls on the partition 32 through the vertical groove 433 and the through groove 422 after heat exchange. The water is discharged from the water tank 222; in the cooling mode, the frame 41 continues to move one position toward the partition 32, the boss 621 does not contact the sealed rain leakage hole 611, and rainwater enters between the inner shell 21 and the outer shell 22. Part of the rainwater falls onto the upper surface of the side diverter 43 and is connected to the liquid collecting hole 511 through the vertical groove 433 on the side of the side diverter 43 away from the main diverter 44. The water is collected by the liquid collecting pipe 52 and enters the circulation pipe 53 to exchange heat with the back of the inner shell 21 for cooling. Part of the rainwater is discharged through the drainage groove 222 after heat exchange on the partition 32.

[0061] Working principle of the present invention: the electrical assembly 7 of the present invention is protected in the inner shell 21. The present invention can switch the sealing mode to prevent dust from entering the electrical assembly 7 and causing poor contact. The liquid level sensor 35 identifies the precipitation on rainy days. The temperature sensor is integrated in the electrical assembly 7. According to the electrical signal of the precipitation and the heating condition of the electrical assembly 7, the displacement of the output end of the servo cylinder 31 is adjusted. The sealing mode working condition is that the output end of the servo cylinder 31 pushes the frame 41, the side diverter 43 and the bottom of the main body of the main diverter 44 contact the liquid collecting hole 511, the inwardly inclined hole 211, and the outwardly inclined hole 221, the inner umbrella 62 is close to the cap 61, the convex column 621 contacts the sealed rain leakage hole 611, the inner shell 21 and the outer shell 22 are separated to prevent dust from entering the inner shell 21 from the inwardly inclined hole 211, the outwardly inclined hole 221, and the rain leakage hole 611. On sunny days, the output end of the servo cylinder 31 pulls the frame 41, and the inclined through pipe 431 is connected to the inwardly inclined hole 211 , the outward-inclined hole 221 switches the ventilation mode, the electrical assembly 7 is ventilated to prevent overheating. On rainy days with little precipitation, the electrical assembly 7 can be switched to a small-displacement drainage mode according to the heating condition of the electrical assembly 7. When the electrical assembly 7 is not overheated, the small-displacement drainage mode is switched. The output end of the servo cylinder 31 pulls the frame 41 to continue to move one position toward the direction close to the partition 32. The protruding column 621 no longer contacts the sealed rain leakage hole 611, and rainwater enters the inner shell 21 and the outer shell 22 from the rain leakage hole 611. Most of it passes through the turning pipe 432 into the outward-inclined hole 221 for discharge, and at the same time, the dust in the outward-inclined hole 221 is cleaned. At this time, the vertical groove 433 contacts the protruding block 421 to seal and switch the cooling mode, collect rainwater and enter the cooling mechanism 5, and perform heat exchange and cooling on the inner shell 21. On rainy days with heavy precipitation, the electrical assembly 7 is not overheated and the sealing mode is switched. When the electrical assembly 7 is overheated and water cooling is required, the large-displacement drainage mode is switched, and the rainwater enters the inner shell 21 and the outer shell 22 for heat exchange and then is discharged.

[0062] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A distributed photovoltaic grid-connected box with dust-proof function, characterized in that: The photovoltaic grid-connected box comprises a box cover (1), a box body (2), a feedback mechanism (3), a drainage mechanism (4), a cooling mechanism (5), a rain cap mechanism (6) and an electrical assembly (7); the box body (2) comprises an inner shell (21) and an outer shell (22); a water pipe hole (223) is provided on the outer shell (22); the box cover (1) is hinged to the outer shell (22); the feedback mechanism (3) comprises a servo cylinder (31); the feedback mechanism (3) is connected to the inner shell (21), the outer shell (22), the drainage mechanism (4), the cooling mechanism (5), the rain cap mechanism (6) and an electrical assembly (7); The water mechanism (4) is fixedly connected, the drainage mechanism (4) is in contact with the inner shell (21) and the outer shell (22), the cooling mechanism (5) comprises a circulation pipe (53), the circulation pipe (53) is fixedly connected to the water pipe hole (223), the drainage mechanism (4) is slidably connected to the cooling mechanism (5), the rain cap mechanism (6) is fixedly connected to the inner shell (21), the outer shell (22) and the drainage mechanism (4), and the servo cylinder (31) is connected to the electrical assembly (7) via an electrical signal.

2. A distributed photovoltaic grid-connected box with dust-proof function according to claim 1, characterized in that: The box body (2) further comprises a waterproof joint (23); the inner shell (21) is fixedly connected to the outer shell (22) and the waterproof joint (23); the inner shell (21) is provided with an inwardly inclined hole (211); the outer shell (22) is also provided with an outwardly inclined hole (221) and a drainage groove (222); the inwardly inclined hole (211) and the outwardly inclined hole (221) are provided in a plurality of groups; the plurality of groups of the inwardly inclined holes (211) and the outwardly inclined holes (221) are uniformly distributed in a rectangular array; the feedback mechanism (3) further comprises a partition (32); the drainage groove (222) is provided in two groups; the two groups of the drainage grooves (222) are provided at the bottom of both sides of the outer shell (22); the drainage groove (222) is provided above the partition (32); the partition (32) is fixedly connected to the inner shell (21) and the outer shell (22); the servo cylinder (31) is fixedly connected to the inner shell (21).

3. A distributed photovoltaic grid-connected box with dust-proof function according to claim 2, characterized in that: The feedback mechanism (3) further comprises a connecting rod (33), an assembly plate (34) and a liquid level sensor (35); a through hole (321) is provided on the partition plate (32); the through hole (321) is slidably connected to the output end of the servo cylinder (31) and the connecting rod (33); the assembly plate (34) is fixedly connected to the output end of the servo cylinder (31) and the connecting rod (33); the servo cylinder (31) is connected to the liquid level sensor (35) via an electrical signal; The drainage mechanism (4) is provided with two groups, and the two groups of the drainage mechanism (4) are arranged on both sides of the inner shell (21). The drainage mechanism (4) comprises a frame (41) and a liquid retaining frame (42). The frame (41) is fixedly connected to the output end of the servo cylinder (31) and the connecting rod (33). The liquid retaining frame (42) is fixedly connected to the partition (32). The liquid retaining frame (42) is provided with a plurality of groups, and the plurality of groups of the liquid retaining frames (42) are linearly evenly distributed along the partition (32).

4. The distributed photovoltaic grid-connected box with dust-proof function according to claim 3 is characterized by: The drainage mechanism (4) further comprises a side flow divider (43) and a main flow divider (44), wherein the side flow divider (43) and the main flow divider (44) are provided in a plurality of groups, wherein the plurality of groups of the side flow divider (43) are linearly evenly distributed along the edge of the frame (41), and the plurality of groups of the main flow divider (44) are evenly distributed in a rectangular array along the side wall of the inner shell (21), wherein the side flow divider (43) and the main flow divider (44) are fixedly connected to the frame (41), and the liquid retaining frame (42) is provided with a convex The side flow divider (43) and the main flow divider (44) are in contact with the inner shell (21), the outer shell (22), and the convex block (421). The convex block (421) and the through groove (422) are provided in a plurality of groups. The plurality of groups of convex blocks (421) and the through groove (422) are linearly evenly distributed along the liquid retaining frame (42). The rain cap mechanism (6) comprises an inner support umbrella (62), and the inner support umbrella (62) is fixedly connected to the frame (41).

5. The distributed photovoltaic grid-connected box with dust-proof function according to claim 4, characterized in that: The side flow divider (43) is provided with an oblique pipe (431), a turning pipe (432), a vertical groove (433) and a side hole (434); the oblique pipe (431) is arranged below the turning pipe (432); two groups of the vertical grooves (433) are provided, and the two groups of the vertical grooves (433) are arranged on both sides of the turning pipe (432); the side hole (434) is connected to the vertical groove (433) on the side away from the main flow divider (44); the side flow divider (43) and the main flow divider (44) have the same virtual features except for the side hole (434); the cooling mechanism (5) of the main flow divider (44) further includes a baffle (51); and the baffle (51) is slidably connected to the side flow divider (43).

6. A distributed photovoltaic grid-connected box with dust-proof function according to claim 5, characterized in that: The cooling mechanism (5) further comprises a liquid collecting pipe (52), the baffle plate (51) and the liquid collecting pipe (52) are each provided with two groups, the two groups of the baffle plate (51) and the liquid collecting pipe (52) are both provided on both sides of the circulation pipe (53), the baffle plate (51) is provided with a liquid collecting hole (511), the liquid collecting hole (511) is provided with a plurality of groups, the plurality of groups of the liquid collecting holes (511) are linearly evenly distributed along the baffle plate (51), and the liquid collecting pipe (52) is connected with the liquid collecting hole (511) and the circulation pipe (53).

7. A distributed photovoltaic grid-connected box with dust-proof function according to claim 6, characterized in that: The rain hat mechanism (6) further comprises a cap (61), wherein the cap (61) is fixedly connected to the inner shell (21) and the outer shell (22), wherein a rain leakage hole (611) is provided on the cap (61), and a convex column (621) and a grille (622) are provided on the inner umbrella (62), wherein the rain leakage hole (611), the convex column (621) and the grille (622) are provided in a plurality of groups, wherein the plurality of groups of the rain leakage holes (611) and the convex column (621) are uniformly distributed in an array, and the plurality of groups of the grilles (622) are uniformly distributed linearly along the inner umbrella (62), and the cap (61) is slidably connected to the inner umbrella (62).

8. The distributed photovoltaic grid-connected box with dust-proof function according to claim 7, characterized in that: The photovoltaic grid-connected box has five working modes: Sealing mode: the protruding column (621) is in contact with the rain leakage hole (611), and the liquid collecting hole (511), the inwardly inclined hole (211), and the outwardly inclined hole (221) are all in contact with the main body of the side flow dividing member (43); Ventilation mode: the convex column (621) contacts the rain leak hole (611), the liquid collecting hole (511) contacts the main body of the side flow divider (43), the inwardly inclined hole (211) and the outwardly inclined hole (221) both contact the inclined through pipe (431), and the vertical groove (433) contacts the convex block (421); Small-displacement drainage mode: the convex column (621) is not in contact with the rain leakage hole (611), the liquid collecting hole (511) and the inward-inclined hole (211) are in contact with the main body of the side diverter (43), the outward-inclined hole (221) is in contact with the turning pipe (432), and the vertical groove (433) is in contact with the convex block (421); Large-displacement drainage mode: the convex column (621) does not contact the rain leak hole (611), the liquid collecting hole (511), the outward-inclined hole (221), and the inward-inclined hole (211) all contact the main body of the side diverter (43), and the vertical groove (433) does not contact the convex block (421); Cooling mode: the convex column (621) is not in contact with the rain leaking hole (611), the inwardly inclined hole (211) and the outwardly inclined hole (221) are both in contact with the main body of the side diverter (43), the vertical groove (433) is in contact with the convex block (421), the liquid collecting hole (511) is in contact with the side hole (434), and the vertical groove (433) is in contact with the convex block (421).

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