Self-cleaning photovoltaic grid-connected inverter

Abstract

The utility model discloses a self-cleaning photovoltaic grid-connected inverter which comprises a cabinet body, a through hole is arranged on the back of the cabinet body, a first support and a second support are arranged in the through hole, a motor is arranged on one side, close to the inside of the cabinet body, of the first support, an output shaft of the motor is rotatably mounted in the first support, a fan is arranged on the output shaft of the motor, and the fan is connected with the first support. The fan is located between the first support and the second support, a plurality of first brushes are movably installed on the first support, the first support and the second support are arranged on the front face and the back face of the fan respectively, and the first brushes and the second brushes are arranged, so that the fan is driven by the motor to rotate to dissipate heat, and the heat dissipation efficiency is improved. The front face and the back face of the fan are in friction with the first brush and the second brush respectively, so that the two faces of the fan are always in a clean state, cleaned dust is discharged through wind power generated by rotation of the fan, the self-cleaning purpose is achieved, and compared with the prior art, complex manual cleaning is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic grid-connected inverters, in particular to a self-cleaning photovoltaic grid-connected inverter. Background Technique

[0002] A photovoltaic inverter can convert the variable DC voltage generated by a photovoltaic solar panel into AC power with the frequency of the commercial power grid, which can be fed back into the commercial power transmission system or used for an off-grid power grid. A photovoltaic inverter is one of the important system balances in a photovoltaic array system and can be used in conjunction with equipment powered by general AC power. A solar inverter has special functions in cooperation with a photovoltaic array, such as the functions of maximum power point tracking and island effect protection.

[0003] There is a fan on the back of the cabinet body of the photovoltaic inverter. After long-term operation, the fan will be covered with dust, affecting its heat dissipation performance. The existing cleaning method usually shuts down the power supply, removes the fan, installs it again after cleaning is completed. This cleaning method needs to be implemented regularly and the operation process is relatively cumbersome. Therefore, a self-cleaning photovoltaic grid-connected inverter is needed to meet people's needs. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a self-cleaning photovoltaic grid-connected inverter to solve the problem in the above background technique that the existing cleaning method usually shuts down the power supply, removes the fan, installs it again after cleaning is completed. This cleaning method needs to be implemented regularly and the operation process is relatively cumbersome.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A self-cleaning photovoltaic grid-connected inverter, including a cabinet body. A through hole is opened on the back surface of the cabinet body. A first bracket and a second bracket are arranged in the through hole. A motor is arranged on one side of the first bracket close to the inside of the cabinet body. The output shaft of the motor is rotatably installed in the first bracket. A fan is arranged on the output shaft of the motor. The fan is located between the first bracket and the second bracket. A plurality of first brushes are movably installed on the first bracket. A plurality of second brushes are movably installed on the second bracket. The brush surfaces of the first brush and the second brush are respectively in contact with the front and back surfaces of the fan.

[0006] Preferably, a protective cover is movably installed on the back surface of the cabinet body, and the protective cover is located at the through hole.

[0007] Preferably, a connecting rod is rotatably installed in the protective cover. A third brush is movably installed on the connecting rod. The brush surface of the third brush is in contact with the inner side surface of the protective cover. A plug rod is arranged at one end of the connecting rod. A plug pin is arranged at one end of the plug rod, and the plug pin is inserted into the fan.

[0008] Preferably, a positioning shaft is rotatably installed in the protective cover, and the positioning shaft is installed at the end of the connecting rod away from the plug rod.

[0009] Preferably, a slot is formed in the fan, and the bolt is inserted into the slot.

[0010] Preferably, a jack is formed in the second bracket, the inner diameter of the jack is larger than the outer diameter of the bolt, and the bolt rod is located in the jack.

[0011] Preferably, the first bracket and the first brush, the second bracket and the second brush, the protective cover and the cabinet body, and the connecting rod and the third brush are all movably connected by a plurality of bolts.

[0012] The beneficial effects of the present utility model are as follows:

[0013] In the present utility model, the first bracket and the second bracket are respectively arranged on the front and back of the fan, and through the arrangement of the first brush and the second brush, when the motor drives the fan to rotate for heat dissipation, the front and back of the fan respectively rub against the first brush and the second brush, so that both sides of the fan are always in a clean state, and the dust cleaned is discharged by the wind generated by the rotation of the fan, thereby achieving the purpose of self-cleaning. Compared with the prior art, complex manual cleaning is avoided.

[0014] In the present utility model, through the arrangement of the protective cover, the fan is wrapped, ensuring exhaust heat dissipation while improving safety. And through the arrangement of the connecting rod, the third brush, the bolt rod and the bolt, when the fan rotates, the bolt, the bolt rod and the connecting rod are driven to rotate, so that the third brush cleans the protective cover, realizing self-cleaning of the protective cover and further improving the heat dissipation efficiency at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. 1 is a schematic front structure diagram of a self-cleaning type photovoltaic grid-connected inverter proposed by the present utility model;

[0016] Figure 2 FIG. 2 is a schematic back structure diagram of a self-cleaning type photovoltaic grid-connected inverter proposed by the present utility model;

[0017] Figure 3 FIG. 3 is a schematic structure diagram of a through hole of a self-cleaning type photovoltaic grid-connected inverter proposed by the present utility model;

[0018] Figure 4 FIG. 4 is a schematic exploded structure diagram of a first bracket and a second bracket of a self-cleaning type photovoltaic grid-connected inverter proposed by the present utility model;

[0019] Figure 5 FIG. 5 is a schematic connection structure diagram of a protective cover and a connecting rod of a self-cleaning type photovoltaic grid-connected inverter proposed by the present utility model.

[0020] In the figure: 1, cabinet body; 2, through hole; 3, first bracket; 4, second bracket; 5, motor; 6, fan; 7, first brush; 8, second brush; 9, protective cover; 10, connecting rod; 11, third brush; 12, inserting rod; 13, bolt; 14, positioning shaft; 15, slot; 16, jack. Detailed implementation manner

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0022] Referring to Figures 1-5 , a self-cleaning photovoltaic grid-connected inverter, includes a cabinet body 1. A through hole 2 is opened on the back surface of the cabinet body 1. A first bracket 3 and a second bracket 4 are arranged in the through hole 2. A motor 5 is arranged on one side of the first bracket 3 close to the inside of the cabinet body 1. The output shaft of the motor 5 is rotatably installed in the first bracket 3. A fan 6 is arranged on the output shaft of the motor 5. The fan 6 is located between the first bracket 3 and the second bracket 4. A plurality of first brushes 7 are movably installed on the first bracket 3. A plurality of second brushes 8 are movably installed on the second bracket 4. The brush surfaces of the first brushes 7 and the second brushes 8 are respectively in contact with the front and back surfaces of the fan 6. By respectively arranging the first bracket 3 and the second bracket 4 at the front and back of the fan 6, and through the arrangement of the first brushes 7 and the second brushes 8, when the motor 5 drives the fan 6 to rotate for heat dissipation, the front and back surfaces of the fan 6 respectively rub against the first brushes 7 and the second brushes 8, so that the two surfaces of the fan 6 are always in a clean state, and the dust cleaned is discharged by the wind generated by the rotation of the fan 6, thereby achieving the purpose of self-cleaning. Compared with the prior art, complex manual cleaning is avoided.

[0023] Specifically, in this embodiment, a protective cover 9 is movably installed on the back surface of the cabinet body 1. The protective cover 9 is located at the through hole 2. Through the arrangement of the protective cover 9, the fan 6 is wrapped, ensuring exhaust heat dissipation while improving safety.

[0024] Specifically, in this embodiment, a connecting rod 10 is rotatably installed in the protective cover 9. A third brush 11 is movably installed on the connecting rod 10. The brush surface of the third brush 11 is in contact with the inner side surface of the protective cover 9. An inserting rod 12 is arranged at one end of the connecting rod 10. A bolt 13 is arranged at one end of the inserting rod 12. The bolt 13 is inserted into the fan 6. Through the arrangement of the connecting rod 10, the third brush 11, the inserting rod 12 and the bolt 13, when the fan 6 rotates, it drives the bolt 13, the inserting rod 12 and the connecting rod 10 to rotate, so that the third brush 11 cleans the protective cover 9, realizing self-cleaning of the protective cover 9 and further improving the heat dissipation efficiency.

[0025] Specifically, in this embodiment, a positioning shaft 14 is rotatably installed inside the protective cover 9. The positioning shaft 14 is installed at one end of the connecting rod 10 away from the plug rod 12. The positioning shaft 14 connects the connecting rod 10 to the protective cover 9, preventing the axial displacement of the connecting rod 10 and ensuring the circumferential rotation of the connecting rod 10.

[0026] Specifically, in this embodiment, a slot 15 is provided on the fan 6, and the plug pin 13 is inserted into the slot 15. The insertion between the slot 15 and the plug pin 13 enables the fan 6 to drive the connecting rod 10 to perform a circumferential motion, thereby realizing the self-cleaning of the protective cover 9.

[0027] Specifically, in this embodiment, a jack 16 is provided on the second bracket 4. The inner diameter of the jack 16 is larger than the outer diameter of the plug pin 13, and the plug rod 12 is located inside the jack 16. The jack 16 facilitates the passing of the plug pin 13 when the protective cover 9 is installed and removed.

[0028] Specifically, in this embodiment, the first bracket 3 and the first brush 7, the second bracket 4 and the second brush 8, the protective cover 9 and the cabinet body 1, and the connecting rod 10 and the third brush 11 are all movably connected by a plurality of bolts. The connection method of the bolts realizes the replacement of the first brush 7 and the replacement of the second brush 8 and the third brush 11 after the protective cover 9 is removed.

[0029] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes an equivalent substitution or change, and should be covered by the protection scope of the present invention.

Claims

1. A self-cleaning photovoltaic grid-connected inverter, comprising a cabinet (1), characterized in that: The cabinet (1) is provided with a through hole (2) on the back side thereof, a first bracket (3) and a second bracket (4) are arranged in the through hole (2), a motor (5) is arranged on a side of the first bracket (3) close to the inside of the cabinet (1), an output shaft of the motor (5) is rotatably mounted in the first bracket (3), a fan (6) is arranged on the output shaft of the motor (5), and the fan (6) is located between the first bracket (3) and the second bracket (4), a plurality of first brushes (7) are movably mounted on the first bracket (3), and a plurality of second brushes (8) are movably mounted on the second bracket (4), and the brush surfaces of the first brush (7) and the second brush (8) are in contact with the front and back sides of the fan (6) respectively.

2. A self-cleaning photovoltaic grid-connected inverter according to claim 1, characterized in that: A protective cover (9) is movably mounted on the back of the cabinet (1), and the protective cover (9) is located at the through hole (2).

3. A self-cleaning photovoltaic grid-connected inverter according to claim 2, characterized in that: A connecting rod (10) is rotatably mounted in the protective cover (9), a third brush (11) is movably mounted on the connecting rod (10), a brush surface of the third brush (11) contacts the inner side surface of the protective cover (9), an insertion rod (12) is arranged at one end of the connecting rod (10), a latch (13) is arranged at one end of the insertion rod (12), and the latch (13) is plugged into the fan (6).

4. A self-cleaning photovoltaic grid-connected inverter according to claim 3, characterized in that: A positioning shaft (14) is rotatably mounted in the protective cover (9), and the positioning shaft (14) is mounted on one end of the connecting rod (10) away from the insertion rod (12).

5. The self-cleaning photovoltaic grid-connected inverter according to claim 1, characterized in that: The fan (6) is provided with a slot (15), and the latch (13) is plugged into the slot (15).

6. The self-cleaning photovoltaic grid-connected inverter according to claim 1, characterized in that: The second bracket (4) is provided with an insertion hole (16), the inner diameter of the insertion hole (16) is larger than the outer diameter of the plug pin (13), and the plug rod (12) is located in the insertion hole (16).

7. A self-cleaning photovoltaic grid-connected inverter according to any one of claims 1 to 3, characterized in that: The first bracket (3) and the first brush (7), the second bracket (4) and the second brush (8), the protective cover (9) and the cabinet (1), and the connecting rod (10) and the third brush (11) are all movably connected via a plurality of bolts.

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