Energy-saving switch box for photovoltaic power generation

Abstract

The utility model discloses an energy-saving switch box for photovoltaic power generation, and relates to the field of switch cabinets, the energy-saving switch box for photovoltaic power generation comprises a cabinet body and a cabinet door rotatably installed on one side of an opening of the cabinet body through a hinge, and the lower end of the side wall of one side of the cabinet body is provided with a main air inlet and an auxiliary air inlet. The position height of the main air inlet is lower than that of the auxiliary air inlet; according to the energy-saving switch box for photovoltaic power generation, through the design of the auxiliary air inlet and the negative-pressure self-overturning cover plate, when the filter screen is blocked, the switch box is automatically opened to guarantee heat dissipation of the cabinet body; the cover plate structure has no power unit, so that the operation and maintenance cost is reduced; the limiting blocking piece of the linkage cabinet door triggers mechanical locking, illegal operation cannot be conducted before forced maintenance, and the energy-saving and safe fool-proof functions are achieved.

Description

Technical Field

[0001] This utility model relates to the field of switchgear, and in particular to an energy-saving switchgear box for photovoltaic power generation. Background Technology

[0002] Existing outdoor switchgear in photovoltaic power generation sites typically employs inlet and outlet structures with filters for heat dissipation. However, these filters are prone to clogging due to dust accumulation. Since such equipment cannot be frequently inspected manually, maintenance often lags behind the actual occurrence of the malfunction. When filter clogging leads to heat dissipation failure, the system must continue operating without effective cooling until manual intervention. During this time, heat cannot be dissipated from the cabinet in a timely manner, posing a serious safety hazard. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, the purpose of this utility model is to provide an energy-saving switch box for photovoltaic power generation, which solves the problem that the equipment cannot dissipate heat properly after the filter screen of the switch cabinet is blocked in the existing technology.

[0004] To address the problems in the existing technology, the technical solution of this utility model is as follows:

[0005] An energy-saving switch box for photovoltaic power generation includes a cabinet and a cabinet door rotatably installed on one side of the cabinet opening. The lower end of the side wall of the cabinet is provided with a main air inlet and a secondary air inlet. A filter screen is fixed on the outer wall of the cabinet opposite the main air inlet. A cover plate is movably connected on the inner wall of the cabinet opposite the secondary air inlet. The cover plate is kept in a blocked position by a magnetic positioning structure. When the filter screen is blocked and the negative pressure generated by the continuous operation of the exhaust fan in the cabinet pushes the cover plate to overcome the magnetic attraction of the magnetic positioning structure and switch to an open position.

[0006] Preferably, the main air inlet and the secondary air inlet are located on the same side wall of the cabinet, and the position height of the main air inlet is lower than that of the secondary air inlet. The cover plate is rotatably connected to the inner wall of the cabinet by a pivot pin, and the pivot pin is located below the cover plate and the connecting frame. A connecting frame is fixed on the inner wall of the cabinet facing the secondary air inlet. The side of the connecting frame near the cover plate is inclined. When the cover plate covers the side of the connecting frame away from the secondary air inlet, it is in a blocking posture.

[0007] Preferably, a rubber sealing gasket is fixed on the side of the connecting frame near the cover plate, and the magnetic positioning structure includes magnet blocks symmetrically fixed on both sides of the upper end of the cover plate. The magnet blocks attract the outer wall of the connecting frame, keeping the cover plate in a sealed posture. The magnetic connection of the magnet blocks makes it easier for the cover plate to open under negative pressure.

[0008] Preferably, a positioning rope is fixed between the upper end of the cover plate and the top surface of the connecting frame. The positioning rope is used to limit the angle at which the cover plate flips open. A limiting baffle is fixed on the inner side of the cabinet door, directly opposite the cover plate. When the cover plate is in the open position, during the process of rotating the cabinet door to close the cabinet, the limiting baffle can abut against the cover plate from the side, preventing the cabinet door from closing.

[0009] Compared with the prior art, the advantages of this utility model are as follows:

[0010] 1. This utility model, by setting up a secondary air inlet and in conjunction with its design, can use negative pressure to automatically flip open the cover of the secondary air inlet when the filter is clogged, thereby opening another air inlet after the filter is clogged to supply heat dissipation to the inside of the cabinet. This ensures that the cabinet's heat dissipation function is normal before maintenance personnel enter after the filter is clogged, reducing safety hazards.

[0011] 2. The structure of the cover plate, connecting frame, and magnet block set in this utility model allows the cover plate to be opened without any other power unit structure. When the filter screen is clogged, the cover plate can be opened automatically by using negative pressure, which reduces the overall manufacturing and operation and maintenance costs of the cabinet and has a significant energy-saving effect.

[0012] 3. This utility model features a design that links the limiting baffle with the cabinet door. If the cabinet door is closed without addressing filter blockage while the cover is open, the mechanical blocking mechanism of the limiting baffle is triggered, creating a forced lock. This foolproof structure directly blocks non-compliant operations through physical interference, forcing inspectors to perform filter maintenance and reset actions. Its triggering condition is precisely linked to the equipment status, avoiding reliance on electronic warning devices and reducing energy consumption. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the connecting frame structure of this utility model.

[0015] Figure 3 This is a schematic diagram of the positioning rope structure of this utility model.

[0016] Figure 4 This is a schematic diagram of the defined baffle structure of this utility model.

[0017] Figure 5 This is a schematic diagram showing the state of the cover plate of this utility model abutting against the limiting baffle.

[0018] The above diagram is labeled as follows: 1. Cabinet body; 2. Cabinet door; 3. Main air inlet; 4. Secondary air inlet; 5. Exhaust outlet; 6. Filter screen; 7. Connecting frame; 8. Cover plate; 9. Rubber sealing gasket; 10. Magnet block; 11. Positioning rope; 12. Limiting baffle. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Please see Figures 1 to 5 This embodiment provides an energy-saving switch box for photovoltaic power generation, including a cabinet 1 and a cabinet door 2 that is hinged and rotatably installed on the opening side of the cabinet 1. A main air inlet 3 and a secondary air inlet 4 are respectively opened at the lower end of one side wall of the cabinet 1. The position of the main air inlet 3 is lower than the position of the secondary air inlet 4. An exhaust port 5 is opened at the upper end of the side wall of the cabinet 1. An exhaust fan is installed on the inner wall of the cabinet 1 directly opposite the exhaust port 5 to achieve the effect of air convection inside the cabinet 1. When the exhaust fan works, air is drawn in through the main air inlet 3 or the secondary air inlet 4, which carries away the heat inside the cabinet 1 and is discharged from the exhaust port 5, thus realizing the heat dissipation of the inside of the cabinet 1. Since the exhaust fan is a conventional technology in the heat dissipation structure of the cabinet 1, it is not shown in the figure.

[0021] A filter screen 6 is fixed on the outer wall of the cabinet 1, facing the main air inlet 3. A connecting frame 7 is fixed on the inner wall of the cabinet 1, facing the secondary air inlet 4. The connecting frame 7 is inclined on the side away from the secondary air inlet 4. A cover plate 8 is rotatably connected to the inner wall of the cabinet 1, facing the secondary air inlet 4, by a shaft pin. The shaft pin is located below the cover plate 8 and the connecting frame 7. When the cover plate 8 covers the side of the connecting frame 7 away from the secondary air inlet 4, it is in a blocking posture. In order to improve the sealing effect of the cover plate 8 on the secondary air inlet 4 after it is attached to the connecting frame 7, a rubber sealing gasket 9 is fixed on the side of the connecting frame 7 near the cover plate 8. In the blocking posture, the cover plate 8 abuts against the rubber sealing gasket 9.

[0022] Magnet blocks 10 are symmetrically fixed on both sides of the upper end of the cover plate 8. The magnet blocks 10 adhere to the outer wall of the connecting frame 7, keeping the cover plate 8 in a blocked position. The magnetic connection of the magnet blocks 10 makes it relatively easy for the cover plate 8 to open under negative pressure. Under normal operation, the cover plate 8 remains in a blocked position, the exhaust fan works, and the outside air enters the inside of the cabinet 1 through the main air inlet 3 after being filtered by the filter screen 6 for heat dissipation. When the filter screen is blocked, the main air inlet 3 cannot ventilate normally, but the exhaust fan continues to work, generating negative pressure inside the cabinet 1. This pushes the cover plate 8 to overcome the magnetic attraction of the magnet blocks 10 and flip down to open. The inclined surface of the connecting frame 7 is designed to make the cover plate 8 tilted, which facilitates its flipping and opening.

[0023] A positioning rope 11 is fixed between the upper end of the cover plate 8 and the top surface of the connecting frame 7. The positioning rope 11 is used to limit the angle at which the cover plate 8 flips open. A limiting baffle 12 is fixed on the inner side of the cabinet door 2, directly opposite the cover plate 8. When the cover plate 8 is in the open position, during the process of rotating the cabinet door 2 to close the cabinet body 1, the limiting baffle 12 can abut against the cover plate 8 from the side, preventing the cabinet door 2 from closing. When the cabinet door 2 is in the closed position, due to the blockage of the filter screen 6, the cover plate 8 flips open. At this time, the cover plate 8 can abut against one side of the limiting baffle. Figure 5 As shown, at this time, the secondary air intake 4 opens to ensure normal heat dissipation. Then, after the maintenance personnel enter the site and open the cabinet door 2, the limiting baffle 12 flips to avoid it, and the cover plate 8 continues to flip downward until the positioning rope 11 is tightened, and the cover plate 8 is positioned in the open position. After the workers arrive to carry out the inspection work, if the filter screen 6 is not cleaned and the cabinet door 2 is closed directly, the limiting baffle will abut against the cover plate 8, so that the cabinet door 2 cannot be closed normally, thus reminding the maintenance personnel to clean the filter screen 6. After cleaning, the maintenance personnel flip the cover plate 8 to restore it to the sealed position, and then the cabinet door 2 can be closed normally.

[0024] In summary, this utility model, through the design of the secondary air inlet 4 and the negative pressure self-reversing cover 8, automatically opens to ensure heat dissipation of the cabinet 1 when the filter screen 6 is clogged; the cover 8 structure has no power unit, reducing operation and maintenance costs; the linkage with the limiting baffle 12 of the cabinet door 2 triggers mechanical locking, preventing unauthorized operation before mandatory maintenance, thus combining energy saving and safety error prevention functions.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy-saving switch box for photovoltaic power generation, comprising a cabinet (1) and a cabinet door (2) rotatably mounted on one side of the opening of the cabinet (1), characterized in that, The lower end of the side wall of the cabinet (1) is provided with a main air inlet (3) and a secondary air inlet (4). A filter screen (6) is fixed on the outer wall of the cabinet (1) in front of the main air inlet (3). A cover plate (8) is movably connected on the inner wall of the cabinet (1) in front of the secondary air inlet (4). The cover plate (8) maintains the blocked posture of the secondary air inlet (4) through the magnetic positioning structure. When the filter screen (6) is blocked and the negative pressure brought by the continuous operation of the exhaust fan in the cabinet (1) is applied, the cover plate (8) is pushed to overcome the magnetic attraction of the magnetic positioning structure and switch to the open posture.

2. The energy-saving switch box for photovoltaic power generation according to claim 1, characterized in that, The main air inlet (3) and the auxiliary air inlet (4) are located on the side wall of the cabinet (1) on the same side, and the position height of the main air inlet (3) is lower than that of the auxiliary air inlet (4).

3. The energy-saving switch box for photovoltaic power generation according to claim 1, characterized in that, The cover plate (8) is rotatably connected to the inner wall of the cabinet (1) by a pivot pin, and the pivot pin is located below the cover plate (8) and the connecting frame (7).

4. The energy-saving switch box for photovoltaic power generation according to claim 3, characterized in that, A connecting frame (7) is fixed on the inner wall of the cabinet (1) facing the secondary air inlet (4). The connecting frame (7) is inclined on the side near the cover plate (8). When the cover plate (8) covers the side of the connecting frame (7) away from the secondary air inlet (4), it is in a blocking posture.

5. The energy-saving switch box for photovoltaic power generation according to claim 4, characterized in that, A rubber sealing gasket (9) is fixed on the side of the connecting frame (7) near the cover plate (8).

6. The energy-saving switch box for photovoltaic power generation according to claim 4, characterized in that, The magnetic positioning structure includes magnet blocks (10) symmetrically fixed on both sides of the upper end of the cover plate (8). The magnet blocks (10) adsorb onto the outer wall of the connecting frame (7) to keep the cover plate (8) in a blocking posture.

7. The energy-saving switch box for photovoltaic power generation according to claim 6, characterized in that, A positioning rope (11) is fixed between the upper end of the cover plate (8) and the top surface of the connecting frame (7). The positioning rope (11) is used to limit the angle at which the cover plate (8) is flipped open. A limiting baffle (12) is fixed on the inner side of the cabinet door (2) directly opposite the cover plate (8). When the cover plate (8) is in the open position, during the process of turning the cabinet door (2) to close the cabinet (1), the limiting baffle (12) can abut against the cover plate (8) from the side of the cover plate (8) and prevent the cabinet door (2) from closing.

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