Outdoor photovoltaic grid-connected cabinet

Abstract

The invention discloses an outdoor photovoltaic grid-connected cabinet, and belongs to the technical field of photovoltaic grid-connected cabinets, the outdoor photovoltaic grid-connected cabinet comprises a cabinet body and a dust removal mechanism arranged in the cabinet body, the dust removal mechanism comprises lifting parts arranged on the inner walls of the two sides of the cabinet body, a telescopic part arranged on one side of the two lifting parts, and a supporting rod connected between the two lifting parts, the sweeping component is connected between the two telescopic components, and the dust collection component is rotatably arranged on the supporting rod and located on the rear side of the sweeping component. The dust removal mechanism is arranged in the cabinet body, the lifting component is used for driving the dust removal mechanism to move from top to bottom to comprehensively clean and remove dust of the electrical equipment in the cabinet body, the telescopic component is used for adapting to cleaning of the electrical equipment of different sizes, and in the process of moving from top to bottom, the sweeping component rotates to sweep dust on the electrical equipment, so that the electrical equipment is cleaned conveniently. And the dust is absorbed by the dust absorption part, so that automatic comprehensive dust removal of the photovoltaic grid-connected cabinet used outdoors is realized, manual maintenance is avoided, and manpower is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic grid-connected cabinets, and specifically to an outdoor photovoltaic grid-connected cabinet. Background Art

[0002] The photovoltaic grid-connected cabinet is a key device in the photovoltaic power generation system, mainly used to convert the direct current generated by photovoltaic modules into alternating current and connect it to the power grid. It has a variety of electrical devices such as circuit breakers, inverters, electricity meters, and controllers inside. When the photovoltaic grid-connected cabinet is used outdoors, since the cabinet body adopts a non-sealed structure for ventilation and heat dissipation, there is a problem of dust accumulation inside after long-term use, which will have a serious adverse impact on the internal electrical devices (such as abnormal heating, short circuit, tripping, etc.). Therefore, it is necessary for staff to perform regular cleaning and maintenance, resulting in manpower loss.

[0003] In the prior art, a patent document with publication number CN 119134084 A discloses a dehumidifying and dust-removing photovoltaic grid-connected cabinet for outdoor open-air environments, including a dehumidifying and dust-removing photovoltaic grid-connected cabinet body. The bottom of the dehumidifying and dust-removing photovoltaic grid-connected cabinet body is provided with an installation component. The installation component includes support legs arranged on the bottom surface of the dehumidifying and dust-removing photovoltaic grid-connected cabinet body, a base arranged at the bottom of the support legs, a slide rail arranged on the inner wall of the base, and rollers arranged at the bottom ends of the support legs. The slide rail is an arc-shaped guide rail, and the rollers slide inside the slide rail. There are multiple support legs, and the number of rollers corresponds to the number of support legs. The installation component further includes a control component arranged on the support legs, through which the rotation of the rollers can be controlled; the installation component further includes a fixing component arranged at the bottom of the dehumidifying and dust-removing photovoltaic grid-connected cabinet body, through which the dehumidifying and dust-removing photovoltaic grid-connected cabinet body can be fixed to the ground. This dehumidifying and dust-removing photovoltaic grid-connected cabinet for outdoor open-air environments effectively solves the problem of foundation adjustment faced by existing photovoltaic grid-connected cabinets when installed on inclined ground, simplifies the construction process, reduces environmental impact, and improves installation efficiency and safety. However, this invention fails to solve the above technical problems. Summary of the Invention

[0004] In view of this, the present invention provides a maintenance-free outdoor photovoltaic grid-connected cabinet in view of the deficiencies of the prior art.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: an outdoor photovoltaic grid-connected cabinet, including a cabinet body and a dust removal mechanism arranged in the cabinet body. The dust removal mechanism includes lifting components arranged on the inner walls on both sides of the cabinet body, telescopic components arranged on one side of the two lifting components, a support rod connected between the two lifting components, a cleaning component connected between the two telescopic components, and a dust suction component rotatably arranged on the support rod. The dust suction component is located behind the cleaning component.

[0006] Further, the lifting component includes a lead screw, a lead screw motor, a lifting block, and a guide rod. The two ends of the lead screw are respectively fixed to the top surface and the bottom surface of the cabinet body through bearings. The upper end of the lead screw passes through the top surface of the cabinet body and is connected to the lead screw motor. The lead screw is threadedly connected with the lifting block. The lifting block is vertically provided with a through hole, and the guide rod is inserted into the through hole and the two ends are respectively fixed to the top surface and the bottom surface of the cabinet body.

[0007] Further, the telescopic component includes an electric telescopic rod and a mounting block. The bottom end of the electric telescopic rod is connected to the front side of the lifting block, and the mounting block is arranged at the top end.

[0008] Further, the cleaning component includes a shaft rod, a flexible brush, and a cleaning motor. The two ends of the shaft rod are respectively installed in the two mounting blocks through bearings. The shaft rod is driven by the cleaning motor, and the flexible brush is arranged on the circumferential side of the shaft rod.

[0009] Further, the dust suction component includes a housing, a filter element, and a suction fan. The inlet of the housing is conical. The filter element is arranged inside the housing. Two connecting rods are arranged at the rear side of the housing. The other ends of the two connecting rods are rotatably connected to the support rod through bearing members. A driven gear is installed outside the bearing members. A rotating shaft is rotatably arranged between the two lifting blocks. The rotating shaft is driven by a stepping motor. A driving gear is arranged on the rotating shaft. The driving gear meshes with the driven gear. A through hole is opened at the rear side of the housing. The through hole is connected to the suction fan arranged on the support rod through a pipeline.

[0010] Further, a through groove is opened in the horizontal direction of the mounting block. A connecting block is movably arranged in the through groove. Limit grooves are opened on the top surface and the bottom surface of the through groove. Limit strips are arranged on the top surface and the bottom surface of the connecting block. The limit strips are located in the limit grooves. A limit rod is arranged at the rear side of the connecting block. The limit rod passes through the rear side of the mounting block, and a spring is sleeved on the limit rod. The end of the shaft rod is installed in the connecting block through a bearing.

[0011] Further, the filter element is a double-layer scroll filter element structure, including two rotating columns. The two rotating columns are both vertically arranged in the housing, and filter nets are wound around the outer sides of the two rotating columns in a circulating manner. One of the rotating columns is driven by a dust cleaning motor. A dust scraping member is arranged on the outer side of one of the rotating columns. The dust scraping member includes a cylindrical outer shell, a fixing rod, a scraping plate, and a torsion spring. The fixing rod is arranged inside the cylindrical outer shell. A vertical hole is opened on one side of the cylindrical outer shell. One side of the scraping plate is rotatably connected to the fixing rod, and the other side extends out of the vertical hole. Vertical strips are arranged on the inner wall of the cylindrical outer shell. The torsion spring is sleeved on the middle part of the fixing rod, and one side is limited by the vertical strip, and the other side is limited by the scraping plate. And the outer end of the scraping plate contacts the filter net.

[0012] Furthermore, a dust discharge hole is formed in the bottom of the cabinet body, and a spring cover plate is arranged on the bottom surface of the cabinet body to block the dust discharge hole.

[0013] Furthermore, the dust removal mechanism further includes a dedicated battery and a controller. The dedicated battery powers the dust removal mechanism, and the lead screw motor, the electric telescopic rod, the cleaning motor, the exhaust fan, the stepping motor, and the dust cleaning motor are all connected to the controller.

[0014] The photovoltaic grid-connected cabinet used outdoors is affected by the natural environment, and dust is likely to accumulate inside it. To solve this problem, industry technicians easily think of using a sealed photovoltaic grid-connected cabinet. However, this will seriously affect the heat dissipation of the cabinet body, especially in the case of high outdoor temperatures. By installing an air conditioner inside it, not only is the cost high, but it is also not environmentally friendly. For this reason, industry technicians can think of installing a dust removal mechanism inside an ordinary photovoltaic grid-connected cabinet. However, since there are multiple different types of electrical equipment inside the photovoltaic grid-connected cabinet, how to design a dust removal structure to achieve comprehensive and effective dust removal for various electrical equipment is a difficult problem. For this reason, the inventor considered using the principle of an existing vacuum cleaner. However, the R & D process is also full of difficulties. For example, in order to achieve maintenance-free, the mechanism needs to be able to automatically discharge the dust absorbed by the vacuum cleaner outside the cabinet body. According to the structure of the existing vacuum cleaner, an air pipe can be used to directly transport the dust to the dust collection device outside the cabinet. However, this will cause new problems: in order to be able to comprehensively clean the dust, the dust removal mechanism needs to move from top to bottom. Therefore, the length of the air pipe is relatively long, and thus, during the movement process, the air pipe is easily wound, affecting the air intake, and even winding around the electrical equipment, posing a safety hazard. To solve this problem, the inventor repeatedly explored and innovated, and designed the outdoor photovoltaic grid-connected cabinet of the present application, which includes a lifting component, a telescopic component, a cleaning component, and a dust suction component, comprehensively solving the problem of dust accumulation when the existing photovoltaic grid-connected cabinet is used outdoors.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. For the outdoor photovoltaic grid-connected cabinet of the present invention, by arranging a dust removal mechanism inside the cabinet body, the lifting component is used to drive the dust removal mechanism to move from top to bottom to comprehensively clean and remove dust from the electrical equipment inside the cabinet body. The telescopic component is used to adapt to the cleaning of electrical equipment of different sizes. During the movement from top to bottom, the cleaning component rotates to sweep the dust on the electrical equipment, and the dust is absorbed by the dust suction component, thereby realizing automatic comprehensive dust removal of the photovoltaic grid-connected cabinet used outdoors, eliminating manual maintenance, and saving manpower.

[0017] 2. In the outdoor photovoltaic grid-connected cabinet of the present invention, both ends of the shaft rod of the cleaning component are respectively installed in the mounting blocks of the two telescopic components. A connecting block is movably arranged in the mounting block, and a spring is arranged on one side of the connecting block, which has a pressing and buffering effect. Thus, when the cleaning component is cleaning, it can safely contact the electrical equipment, ensuring the cleaning effect and not affecting the electrical equipment.

[0018] 3. In the outdoor photovoltaic grid-connected cabinet of the present invention, the rear side of the housing of the dust suction component is rotatably connected to the support rod through two connecting rods and bearing components, and the driven gear installed outside the bearing component is driven by a stepper motor. Thus, after the dust removal mechanism finishes cleaning from top to bottom, the stepper motor drives the dust suction component to rotate downward, so that the housing pushes open the spring cover plate on the bottom surface of the cabinet body, and the opening of the housing faces downward, thereby pouring out the dust collected in the dust suction component outside the cabinet.

[0019] 3. In the outdoor photovoltaic grid-connected cabinet of the present invention, a double-layer scroll filter element structure is arranged inside the housing of the dust suction component. When the housing is turned downward to pour out the dust after dust suction, the cleaning motor drives one of the rotating columns to make the filter screen rotate. During the rotation, the scraper scrapes the dust on the filter screen clean, which is convenient for subsequent use and realizes maintenance-free. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0021] Figure 2 is a partial structural schematic diagram of the dust removal mechanism in an embodiment of the present invention;

[0022] Figure 3 is a side sectional view of the housing in an embodiment of the present invention;

[0023] Figure 4 is a side sectional view of the mounting block in an embodiment of the present invention;

[0024] Figure 5 is a top view of the filter element in an embodiment of the present invention;

[0025] Figure 6 is a structural schematic diagram of the ash scraping member in an embodiment of the present invention;

[0026] In the figure: 1 - cabinet body, 2 - lifting component, 3 - telescopic component, 4 - support rod, 5 - cleaning component, 6 - dust suction component, 7 - ash scraping piece, 8 - ash discharge hole, 21 - lead screw, 22 - lead screw motor, 23 - lifting block, 24 - guide rod, 25 - through hole, 31 - electric telescopic rod, 32 - mounting block, 321 - through slot, 322 - connecting block, 323 - limiting slot, 324 - limiting strip, 325 - limiting rod, 326 - spring, 51 - shaft rod, 52 - flexible brush, 61 - housing, 62 - filter element, 621 - rotating column, 622 - filter screen, 63 - exhaust fan, 64 - connecting rod, 65 - bearing part, 66 - driven gear, 67 - rotating shaft, 68 - driving gear, 71 - cylindrical outer shell, 72 - fixing rod, 73 - scraping plate, 74 - torsion spring. Detailed implementation mode

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art fall within the scope of protection of the present invention.

[0028] Embodiment: As Figures 1 to 6 shown, an outdoor photovoltaic grid-connected cabinet includes a cabinet body 1 and a dust removal mechanism arranged inside the cabinet body 1. The dust removal mechanism includes a lifting component 2 arranged on the inner walls on both sides of the cabinet body 1, a telescopic component 3 arranged on one side of the two lifting components 2, a support rod 4 connected between the two lifting components 2, a cleaning component 5 connected between the two telescopic components 3, and a dust suction component 6 rotatably arranged on the support rod 4. The dust suction component 6 is located behind the cleaning component 5.

[0029] Specifically, the lifting component 2 includes a lead screw 21, a lead screw motor 22, a lifting block 23 and a guide rod 24. The two ends of the lead screw 21 are respectively fixed to the top surface and the bottom surface of the cabinet body 1 through bearings. The upper end of the lead screw 21 passes through the top surface of the cabinet body 1 and is connected to the lead screw motor 22. The lead screw 21 is threadedly connected to the lifting block 23. The lifting block 23 is vertically provided with a through hole 25. The guide rod 24 is inserted into the through hole 25 and its two ends are respectively fixed to the top surface and the bottom surface of the cabinet body 1.

[0030] The telescopic component 3 includes an electric telescopic rod 31 and a mounting block 32. The bottom end of the electric telescopic rod 31 is connected to the front side of the lifting block 23, and the mounting block 32 is arranged at the top end.

[0031] The cleaning component 5 includes a shaft rod 51, a flexible brush 52 and a cleaning motor. Both ends of the shaft rod 51 are respectively installed in the two mounting blocks 32 through bearings. The shaft rod 51 is driven by the cleaning motor, and the flexible brush 52 is arranged on the circumferential side of the shaft rod 51.

[0032] The dust suction component 6 includes a housing 61, a filter element 62 and an exhaust fan 63. The inlet of the housing 61 is conical. The filter element 62 is arranged inside the housing 61. Two connecting rods 64 are arranged at the rear side of the housing 61. The other ends of the two connecting rods 64 are respectively and rotatably connected to the support rod 4 through bearing members 65. A driven gear 66 is installed on the outer side of the bearing member 65. A rotating shaft 67 is rotatably arranged between the two lifting blocks 23. The rotating shaft 67 is driven by a stepping motor. A driving gear 68 is arranged on the rotating shaft 67. The driving gear 68 meshes with the driven gear 66. A through hole is opened at the rear side of the housing 61, and the through hole is connected to the exhaust fan 63 arranged on the support rod 4 through a pipeline.

[0033] A through groove 321 is opened in the mounting block 32 in the horizontal direction. A connecting block 322 is movably arranged in the through groove 321. Limiting grooves 323 are opened on the top surface and the bottom surface of the through groove 321. Limiting strips 324 are arranged on the top surface and the bottom surface of the connecting block 322. The limiting strips 324 are located in the limiting grooves 323. A limiting rod 325 is arranged at the rear side of the connecting block 322. The limiting rod 325 penetrates out from the rear side of the mounting block 32, and a spring 326 is sleeved on the limiting rod 325. The end of the shaft rod 51 of the cleaning component 5 is installed in the connecting block 322 through a bearing.

[0034] The filter element 62 is a double-layer scroll filter element structure, including two rotating columns 621. Both of the rotating columns 621 are vertically arranged in the housing 61, and a filter screen 622 is wound around the outer sides of the two rotating columns 621 in a circulating manner. One of the rotating columns 621 is driven by a dust cleaning motor. A dust scraping member 7 is arranged on the outer side of one of the rotating columns 621. The dust scraping member 7 includes a cylindrical outer shell 71, a fixing rod 72, a scraping plate 73 and a torsion spring 74. The fixing rod 72 is arranged inside the cylindrical outer shell 71. A vertical hole 75 is opened on one side of the cylindrical outer shell 71. One side of the scraping plate 73 is rotatably connected to the fixing rod 72, and the other side extends out from the vertical hole 75. Vertical strips are arranged on the inner wall of the cylindrical outer shell 71. The torsion spring 74 is sleeved on the middle part of the fixing rod 72, and one side is limited by the vertical strips, and the other side is limited by the scraping plate 73, and the outer end of the scraping plate 73 contacts the filter screen 622.

[0035] A dust discharging hole 8 is opened at the bottom of the cabinet body 1, and a spring cover plate is arranged on the bottom surface of the cabinet body 1 for blocking the dust discharging hole 8.

[0036] The dust removal mechanism further includes a dedicated battery and a controller. The dedicated battery powers the dust removal mechanism. The lead screw motor 22, the electric telescopic rod 31, the cleaning motor, the exhaust fan 63, the stepping motor, and the ash cleaning motor are all connected to the controller. The controller is built with a timing module, and according to the outdoor environment and the degree of dust accumulation, it starts the dust removal mechanism regularly (such as once a week, once a month, etc.). The controller stores a control program, including automatically controlling the cooperation of the lifting component and the telescopic component according to the positions and volumes of various electrical equipment in the cabinet.

[0037] The working principle of the outdoor photovoltaic grid-connected cabinet in the embodiment of the present invention:

[0038] The initial position of the dust removal mechanism is at the top inside the cabinet 1, which has concealment. When the set time arrives, the controller controls to start the dust removal mechanism. The lifting component 2 drives the entire dust removal mechanism to slowly move downward. At the same time, the cleaning component 5 and the dust suction component 6 are also in the starting state. Under the action of the telescopic component 3, the dust on various electrical equipment is cleaned and sucked. The dust is adsorbed on the filter element 62 inside the cover 61. When the dust removal mechanism reaches the bottom of the cabinet 1, the controller controls to turn off the lifting component 2, the cleaning component 5, and the dust suction component 6, and controls the stepping motor to drive the dust suction component 6 to rotate downward by 90 degrees. When the cover 61 rotates, it can push open one side of the spring cover body at the bottom of the cabinet 1, so that the opening of the cover 61 is aligned with the ash discharge hole 8. Then the controller controls the ash cleaning motor to start, driving the rotating column 621 to rotate, so that the filter screen 622 rotates. During the rotation process, the scraper 73 on one side of the rotating column 621 scrapes off the dust adsorbed on the filter screen 622, and it falls out of the cabinet through the ash discharge hole 8 under the action of gravity, thus completing an ash cleaning operation. Then, the controller controls the dust removal mechanism to reset.

[0039] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still modify or equivalently replace the specific implementation manners of the present invention. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention is within the protection scope of the claims of the present invention.

Claims

1. An outdoor photovoltaic grid-connected cabinet, comprising a cabinet body and a dust removal mechanism arranged in the cabinet body, characterized in that: The dust removal mechanism includes a lifting component arranged on the inner walls on both sides of the cabinet, a telescopic component arranged on one side of the two lifting components, a support rod connected between the two lifting components, a cleaning component connected between the two telescopic components, and a dust suction component rotatably arranged on the support rod, and the dust suction component is located on the rear side of the cleaning component.

2. The outdoor photovoltaic grid-connected cabinet according to claim 1, characterized in that: The lifting component includes a screw rod, a screw motor, a lifting block and a guide rod. The two ends of the screw rod are respectively fixed to the top and bottom surfaces of the cabinet through bearings. The upper end of the screw rod passes through the top surface of the cabinet and is connected to the screw motor. The screw rod is threadedly connected to the lifting block. The lifting block is vertically provided with a through hole. The guide rod is penetrated by the through hole, and the two ends are respectively fixed to the top and bottom surfaces of the cabinet.

3. The outdoor photovoltaic grid-connected cabinet according to claim 2, characterized in that: The telescopic component comprises an electric telescopic rod and a mounting block. The bottom end of the electric telescopic rod is connected to the front side of the lifting block, and the mounting block is arranged on the top end.

4. The outdoor photovoltaic grid-connected cabinet according to claim 3, characterized in that: The cleaning component comprises a shaft, a flexible brush and a cleaning motor. Both ends of the shaft are respectively installed in the two mounting blocks through bearings. The shaft is driven by the cleaning motor, and the flexible brush is arranged on the peripheral side of the shaft.

5. The outdoor photovoltaic grid-connected cabinet according to claim 4, characterized in that: The dust suction component includes a cover shell, a filter element and an exhaust fan. The inlet of the cover shell is conical, the filter element is arranged inside the cover shell, two connecting rods are arranged on the rear side of the cover shell, the other ends of the two connecting rods are rotatably connected to the support rod through bearing parts, a driven gear is installed on the outside of the bearing parts, a rotating shaft is rotatably arranged between the two lifting blocks, the rotating shaft is driven by a stepping motor, a driving gear is arranged on the rotating shaft, and the driving gear is meshed with the driven gear; a through hole is opened on the rear side of the cover shell, and the through hole is connected to the exhaust fan arranged on the support rod through a pipeline.

6. The outdoor photovoltaic grid-connected cabinet according to claim 5, characterized in that: The mounting block is provided with a through slot in the horizontal direction, a connecting block is movably arranged in the through slot, limiting slots are provided on the top and bottom surfaces of the through slot, limiting strips are provided on the top and bottom surfaces of the connecting block, the limiting strips are located in the limiting slots, a limiting rod is provided on the rear side of the connecting block, the limiting rod passes through the rear side of the mounting block, a spring is sleeved on the limiting rod, and the end of the shaft rod is installed on the connecting block through a bearing.

7. The outdoor photovoltaic grid-connected cabinet according to claim 6, characterized in that: The filter element is a double-layer scroll filter element structure, including two rotating columns, both of which are vertically arranged in the cover shell, and the filter screen is cyclically wound on the outside of the two rotating columns, one of the rotating columns is driven by a cleaning motor, and a scraper is arranged on the outside of one of the rotating columns, and the scraper includes a cylindrical shell, a fixed rod, a scraper and a torsion spring. The fixed rod is arranged inside the cylindrical shell, and a vertical hole is opened on one side of the cylindrical shell. One side of the scraper is rotatably connected to the fixed rod, and the other side extends out from the vertical hole. A vertical bar is arranged on the inner wall of the cylindrical shell, and the torsion spring is sleeved on the middle part of the fixed rod, and one side is limited by the vertical bar and the other side is limited by the scraper, and the outer end of the scraper is in contact with the filter screen.

8. The outdoor photovoltaic grid-connected cabinet according to claim 7, characterized in that: The bottom of the cabinet is provided with an ash discharge hole, and the bottom surface of the cabinet is provided with a spring cover plate for blocking the ash discharge hole.

9. The outdoor photovoltaic grid-connected cabinet according to claim 8, characterized in that: The dust removal mechanism also includes a dedicated battery and a controller. The dedicated battery supplies power to the dust removal mechanism. The screw motor, the electric telescopic rod, the cleaning motor, the exhaust fan, the stepping motor and the dust cleaning motor are all connected to the controller.

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