Photovoltaic inverter bottom ventilation structure with foreign matter invasion prevention function

Abstract

The invention belongs to the technical field of inverters, and particularly relates to a photovoltaic inverter bottom ventilation structure with a foreign matter invasion prevention function, which comprises an inverter body, a plurality of air inlet holes are formed in the top of the inverter body, a first fixing frame is mounted at the bottom of the inverter body, and a cooling fan is mounted in the first fixing frame. The first fixing frame is internally provided with a coarse protective net and a fine protective net, the first fixing frame is provided with a connecting assembly, the coarse protective net is provided with a supporting assembly, the top of the inverter body is provided with a shielding assembly, the connecting assembly comprises a pair of sliding grooves, and the pair of sliding grooves are symmetrically formed in the bottom of the first fixing frame; through the above structure, the thick protective net and the thin protective net have different mesh sizes, external foreign matters with different sizes can be prevented, and the situation that external small animals invade into the inverter body from the first fixing frame and the heat dissipation fan can be reduced.

Description

Photovoltaic inverter bottom ventilation structure with foreign object intrusion prevention function Technical Field

[0001] This invention belongs to the field of inverter technology, specifically a bottom ventilation structure for photovoltaic inverters with anti-foreign object intrusion function. Background Technology

[0002] Photovoltaic inverters are the core equipment in photovoltaic power generation systems, responsible for converting the direct current (DC) generated by solar photovoltaic panels into alternating current (AC) for use by the power grid or electrical equipment.

[0003] Existing photovoltaic inverters require an internal ventilation and heat dissipation system to dissipate the heat generated during operation, reducing the risk of component overheating and aging that could affect the overall lifespan. Cooling fans can be installed on the sides, top, and bottom of the inverter body. However, the fan installation locations usually have some openings to the outside. Although protective nets and other facilities are installed, existing protective nets are usually single-layered with large mesh openings, which can allow small animals to enter the inverter through the mesh.

[0004] To address this, the present invention provides a bottom ventilation structure for a photovoltaic inverter with anti-foreign object intrusion function. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies and solve at least one of the problems mentioned in the background technology, a bottom ventilation structure for photovoltaic inverters with anti-foreign object intrusion function is proposed.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: The bottom ventilation structure of the photovoltaic inverter with anti-foreign object intrusion function of this invention includes an inverter body, a plurality of air inlets on the top of the inverter body, a first fixing frame installed at the bottom of the inverter body, a cooling fan installed in the first fixing frame, a coarse protective net and a fine protective net installed in the first fixing frame, a connecting component on the first fixing frame, a supporting component on the coarse protective net, and a shielding component on the top of the inverter body. Through the above structure, the different mesh sizes of the coarse and fine protective nets can prevent foreign objects of different sizes from entering the inverter body through the first fixing frame and the cooling fan.

[0007] Preferably, the connecting assembly includes a pair of sliding grooves, which are symmetrically arranged at the bottom of the first fixed frame. A rod is slidably connected in the sliding groove. A pair of fixing blocks are fixed to the side wall of the coarse protective net. Magnets are installed at the ends of the rods and in the fixing blocks. With the above structure, the rods, fixing blocks and magnets work together to facilitate the installation and disassembly of the coarse and fine protective nets, thereby improving the convenience of maintenance or cleaning of the coarse and fine protective nets.

[0008] Preferably, the shielding assembly includes a second fixing frame, which is fixed to the top of the inverter body. A top cover is fixed to the top of the second fixing frame, and a filter assembly is provided on the second fixing frame. With the above structure, the second fixing frame and the top cover are located on the top of the inverter body, which can reduce the possibility of rainwater entering the inverter body through the air inlet in outdoor environments, causing internal components to become damp and damaged.

[0009] Preferably, the filter assembly includes a pair of guide rails, which are symmetrically fixed to the second fixed frame. A filter screen is slidably connected inside the guide rails, and the filter screen is fixed to the second fixed frame by a pin. With the above structure, the filter screen can filter the airflow entering the air inlet, thereby reducing the possibility of dust and impurities in the airflow entering the inverter body from the air inlet, causing them to adhere to the components inside the inverter body, resulting in pollution and affecting heat dissipation. The filter screen, together with the pin, can be easily disassembled and installed, improving the convenience of regular filter screen cleaning.

[0010] Preferably, the bottom of the thick protective net is equipped with multiple plastic strips, which are flexible structures. With the above structure, when the plastic strips sway with the airflow, they can play a certain warning role, thereby reducing the risk of small animals approaching.

[0011] Preferably, the support component includes a support frame, which is fixed to the top of the coarse protective netting. The top of the support frame contacts the bottom of the fine protective netting. Through the above structure, the contact between the support frame and the bottom of the fine protective netting can support the fine protective netting, thereby reducing the situation where the fine protective netting is suspended between the coarse and thick protective netting, which would cause the fine protective netting to sag and deform.

[0012] Preferably, the fine protective net is made of nylon. Through the above structure, the nylon material has the characteristics of high strength, corrosion resistance and easy processing, thereby improving the overall protective performance of the fine protective net.

[0013] The beneficial effects of the present invention are as follows: 1. The bottom ventilation structure of the photovoltaic inverter with the function of preventing foreign object intrusion described in the present invention can prevent foreign objects of different sizes from entering the inverter body through the different mesh sizes of the coarse and fine protective nets, and can reduce the situation where small animals from the outside can enter the inverter body from the first fixed frame and the heat dissipation fan.

[0014] 2. The bottom ventilation structure of the photovoltaic inverter with anti-foreign object intrusion function described in this invention, through the cooperation of the plug rod, fixing block and magnet, facilitates the installation and disassembly of the coarse and fine protective nets, thereby improving the convenience of maintenance or cleaning of the coarse and fine protective nets. Attached Figure Description

[0015] The invention will now be further described with reference to the accompanying drawings.

[0016] Figure 1 is a perspective view of the present invention; Figure 2 is a schematic diagram of the cooperation structure between the top cover and the inverter body in the present invention; Figure 3 is a schematic diagram of the structure of the filter screen in the present invention; Figure 4 is a schematic diagram of the cooperation structure between the inverter body and the first fixed frame in the present invention; Figure 5 is a schematic diagram of the cooperation structure between the coarse protective net and the fine protective net in the present invention; Figure 6 is a schematic diagram of the structure of the sliding groove in the present invention.

[0017] Legend: 1. Inverter body; 11. Air inlet; 12. First fixing frame; 13. Cooling fan; 14. Coarse protective mesh; 15. Fine protective mesh; 2. Slide groove; 21. Insert rod; 22. Fixing block; 23. Magnet; 3. Second fixing frame; 31. Top cover; 4. Guide rail; 41. Filter screen; 42. Pin; 5. Plastic strip; 6. Support frame. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Specific implementation examples are given below.

[0020] As shown in Figures 1 to 6, the bottom ventilation structure of the photovoltaic inverter with anti-foreign object intrusion function according to the embodiment of the present invention includes an inverter body 1. The top of the inverter body 1 has multiple air inlets 11. A first fixing frame 12 is installed at the bottom of the inverter body 1. A cooling fan 13 is installed inside the first fixing frame 12. A coarse protective mesh 14 and a fine protective mesh 15 are installed inside the first fixing frame 12. A connecting component is provided on the first fixing frame 12, a supporting component is provided on the coarse protective mesh 14, and a shielding component is provided at the top of the inverter body 1. During operation, the first fixing frame 12 is bolted to the inverter body. At the bottom of the inverter body 1, the cooling fan 13 is activated, which drives the airflow into the inverter body 1 through the air inlet 11, and then flows to the cooling fan 13 to be discharged to the outside. At this time, the inverter body 1 can be ventilated and cooled. When small animals from the outside move into the inverter body 1 from the first fixed frame 12, the coarse protective net 14 and the fine protective net 15 are located at the bottom of the first fixed frame 12, which can keep the small animals out of the outside. Through the above structure, the different mesh sizes of the coarse protective net 14 and the fine protective net 15 can prevent foreign objects of different sizes from entering the inverter body 1 from the first fixed frame 12 and the cooling fan 13.

[0021] As shown in Figures 4 and 6, the connecting assembly includes a pair of sliding grooves 2, which are symmetrically arranged at the bottom of the first fixed frame 12. A rod 21 is slidably connected within each sliding groove 2. A pair of fixing blocks 22 are fixed to the side wall of the coarse protective net 14. Magnets 23 are installed at the ends of the rods 21 and inside the fixing blocks 22. During operation, the fixing blocks 22 are inserted into the sliding grooves 2, and then the rods 21 are pushed into the holes of the fixing blocks 22. When the magnets 23 at the ends of the rods 21 and the magnets 23 inside the holes of the fixing blocks 22 are attracted together, the coarse protective net 14 can be connected. The coarse protective net 14 and the fine protective net 15 are installed inside the first fixed frame 12. When it is necessary to disassemble the coarse protective net 14 and the fine protective net 15, the two magnets 23 can be separated by pulling the insert rod 21, and the insert rod 21 can be dislodged from the hole of the fixed block 22, thereby releasing the fixation of the coarse protective net 14 and the fine protective net 15. Through the above structure, the cooperation of the insert rod 21, the fixed block 22 and the magnets 23 makes it easy to install and disassemble the coarse protective net 14 and the fine protective net 15, thereby improving the convenience of maintenance or cleaning of the coarse protective net 14 and the fine protective net 15.

[0022] As shown in Figures 1 to 3, the shielding assembly includes a second fixing frame 3, which is fixed to the top of the inverter body 1. A top cover 31 is fixed to the top of the second fixing frame 3. A filter assembly is provided on the second fixing frame 3. When the entire device is installed in an outdoor environment, rainwater will enter the inverter body 1 through the air inlet 11 during rainy weather. At this time, the top cover 31, located on the top of the inverter body 1, can block the rainwater and allow it to flow to the ground on both sides along the slope of the top cover 31. Through the above structure, the second fixing frame 3 and the top cover 31 are located on the top of the inverter body 1, which can reduce the possibility of rainwater entering the inverter body 1 through the air inlet 11 in an outdoor environment, causing internal components to become damp and damaged.

[0023] As shown in Figure 3, the filter assembly includes a pair of guide rails 4, which are symmetrically fixed to the second fixed frame 3. A filter screen 41 is slidably connected inside the guide rails 4. The filter screen 41 is fixed to the second fixed frame 3 by a pin 42. During operation, when air enters the air inlet 11 from the outside, it passes through the filter screen 41. At this time, the filter screen 41 filters the airflow, removing dust and impurities from the airflow. When it is necessary to clean the filter screen 41, the pin 42 can be removed and the filter screen 41 can be pulled out for cleaning. Then the filter screen 41 can be reinstalled. Through the above structure, the filter screen 41 can filter the airflow entering the air inlet 11, thereby reducing the possibility of dust and impurities in the airflow entering the inverter body 1 from the air inlet 11, causing them to adhere to the components inside the inverter body 1, resulting in pollution and affecting heat dissipation. The filter screen 41, together with the pin 42, facilitates the disassembly and installation of the filter screen 41, improving the convenience of regular cleaning of the filter screen 41.

[0024] As shown in Figure 4, multiple plastic strips 5 are installed at the bottom of the thick protective net 14. The multiple plastic strips 5 are flexible structures. When the cooling fan 13 blows air to the outside, the airflow passes through the plastic strips 5. Due to the flexible structure of the plastic strips 5 themselves, the plastic strips 5 will swing with the airflow. Through the above structure, when the plastic strips 5 swing with the airflow, it can play a certain warning role, thereby reducing the approach of small animals.

[0025] As shown in Figure 5, the support assembly includes a support frame 6, which is fixed to the top of the coarse protective net 14. The top of the support frame 6 contacts the bottom of the fine protective net 15. During operation, when the fine protective net 15 is installed on the coarse protective net 14, the bottom of the fine protective net 15 will contact the support frame 6. Through the above structure, the contact between the support frame 6 and the bottom of the fine protective net 15 can support the fine protective net 15, thereby reducing the situation where the fine protective net 15 is suspended between the coarse protective net 14, which would cause the fine protective net 15 to sag and deform.

[0026] As shown in Figure 5, the fine protective net 15 is made of nylon. Through the above structure, the nylon material has the characteristics of high strength, corrosion resistance and easy processing, thereby improving the overall protective performance of the fine protective net 15.

[0027] Working principle: The first fixing frame 12 is bolted to the bottom of the inverter body 1. The cooling fan 13 is started, which drives the airflow into the inverter body 1 through the air inlet 11 and then flows to the cooling fan 13 to be discharged to the outside. At this time, ventilation and heat dissipation can be achieved inside the inverter body 1. When small animals move from the first fixing frame 12 into the inverter body 1, the coarse protective net 14 and the fine protective net 15 are located at the bottom of the first fixing frame 12, which can keep the small animals out. The fixing block 22 is inserted into the sliding groove 2, and then the plug rod 21 is pushed into the hole of the fixing block 22. When the magnet 23 at the end of the plug rod 21 is attracted to the magnet 23 in the hole of the fixing block 22, the coarse protective net 14 and the fine protective net 15 can be installed inside the first fixing frame 12. When it is necessary to remove the coarse protective net 14 and the fine protective net 15, the two magnets 23 can be separated by pulling the plug rod 21, and the plug rod 21 can be removed from the fixing block. The coarse protective net 14 and the fine protective net 15 can be released by removing the net from the hole 22. When the whole equipment is installed in an outdoor environment, rainwater will enter the inverter body 1 through the air inlet 11 during rainy weather. At this time, the top cover 31 is located on the top of the inverter body 1 and can block the rainwater. The rainwater flows to the ground on both sides along the slope of the top cover 31. When the air enters the air inlet 11 from the outside, it will pass through the filter screen 41. At this time, the filter screen 41 will filter the airflow and filter out the dust and impurities in the airflow. When the filter screen 41 needs to be cleaned, the pin 42 can be removed and the filter screen 41 can be pulled out for cleaning. Then the filter screen 41 can be reinstalled. When the cooling fan 13 blows air to the outside, the airflow passes through the plastic strip 5. Due to the flexible structure of the plastic strip 5 itself, the plastic strip 5 will swing with the airflow. When the fine protective net 15 is installed on the coarse protective net 14, the bottom of the fine protective net 15 will contact the support frame 6.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bottom ventilation structure for a photovoltaic inverter with anti-foreign object intrusion function, comprising an inverter body (1), characterized in that: The inverter body (1) has multiple air inlets (11) on its top. The inverter body (1) has a first fixed frame (12) installed at its bottom. A cooling fan (13) is installed inside the first fixed frame (12). A coarse protective net (14) and a fine protective net (15) are installed inside the first fixed frame (12). A connecting component is provided on the first fixed frame (12). A support component is provided on the coarse protective net (14). A shielding component is provided on the top of the inverter body (1).

2. The bottom ventilation structure of the photovoltaic inverter with anti-foreign object intrusion function according to claim 1, characterized in that: The connecting assembly includes a pair of sliding grooves (2), which are symmetrically opened at the bottom of the first fixed frame (12). A rod (21) is slidably connected in the sliding groove (2). A pair of fixing blocks (22) are fixed to the side wall of the thick protective net (14). Magnets (23) are installed at the end of the rod (21) and in the fixing blocks (22).

3. The bottom ventilation structure of the photovoltaic inverter with anti-foreign object intrusion function according to claim 1, characterized in that: The shielding assembly includes a second fixing frame (3), which is fixed to the top of the inverter body (1). A top cover (31) is fixed to the top of the second fixing frame (3), and a filter assembly is provided on the second fixing frame (3).

4. The bottom ventilation structure of the photovoltaic inverter with anti-foreign object intrusion function according to claim 3, characterized in that: The filter assembly includes a pair of guide rails (4), which are symmetrically fixed to the second fixed frame (3). A filter screen (41) is slidably connected inside the guide rails (4), and the filter screen (41) is fixed to the second fixed frame (3) by a pin (42).

5. The bottom ventilation structure of the photovoltaic inverter with anti-foreign object intrusion function according to claim 1, characterized in that: The bottom of the thick protective net (14) is equipped with multiple plastic strips (5), and the multiple plastic strips (5) are flexible structures.

6. The bottom ventilation structure of the photovoltaic inverter with anti-foreign object intrusion function according to claim 1, characterized in that: The support assembly includes a support frame (6), which is fixed to the top of the coarse protective net (14), and the top of the support frame (6) is in contact with the bottom of the fine protective net (15).

7. The bottom ventilation structure of the photovoltaic inverter with anti-foreign object intrusion function according to claim 1, characterized in that: The fine protective net (15) is made of nylon.

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