Photovoltaic grid-connected cabinet

Abstract

The utility model discloses a photovoltaic grid-connected cabinet in the field of grid-connected cabinets, which comprises a shell and a cover plate rotatably connected to the side surface of the shell, a handle connected to the outer end surface of the cover plate, a control panel connected to the top of the shell, a display screen arranged on the control panel, a plurality of control buttons arranged on the control panel, and a mounting bracket connected to the side surface of the shell, a plurality of butt joint pipes are connected to the bottom of the shell in a penetrating mode, a ventilation component is connected to the inner wall of the shell, and a grid connection component is connected to the inner wall of the shell. In actual use, the voltages and currents generated by the photovoltaic modules are different, so that the high-voltage photovoltaic module generates reverse voltage influence on the low-voltage photovoltaic module, and the device can be ensured not to generate voltage countercurrent through an independent butt joint structure and a unilateral diode structure.

Description

Technical Field

[0001] The utility model relates to the technical field of grid-connected cabinets, in particular to a photovoltaic grid-connected cabinet. Background Art

[0002] Photovoltaic grid-connected cabinets, as the total output of photovoltaic power stations, exist in photovoltaic distributed power station systems and are distribution devices connecting photovoltaic power stations and power grids. Their function is to serve as the dividing point between photovoltaic power generation systems and power grids. For photovoltaic power stations with low-voltage grid-connected cabinets, metering and protection functional devices can also be installed in the photovoltaic grid-connected cabinets. Photovoltaic grid-connected cabinets in existing technologies will generate a lot of heat during use. The hot air will affect the use of the photovoltaic grid-connected cabinets and also cause certain safety hazards.

[0003] A Chinese patent with announcement number CN221057922U discloses a photovoltaic grid-connected cabinet, comprising a cabinet body, a cabinet door hinged to one side of the front of the cabinet body by a hinge, the interior of the cabinet body being divided into a grid-connected installation compartment located on the upper layer and a heat dissipation layer located on the lower layer by a partition, a cooling fan being provided inside the heat dissipation layer, a dust-proof vent hole penetrating from top to bottom being provided in the middle of the partition, a plurality of mounting plates for installing grid-connected electrical components being provided on the rear inner wall of the grid-connected installation compartment, a dry powder fire extinguisher being provided on the outer wall of the cabinet body, a rainproof eaves being provided on the top of the cabinet body, and ventilation leaves being provided at the upper end of the grid-connected installation compartment and on the side walls of the heat dissipation layer of the cabinet body; the photovoltaic grid-connected cabinet dissipates heat and cools the electrical components in the grid-connected cabinet by a cooling fan, adjusts the sealing of the grid-connected cabinet by openable and closable ventilation leaves, and is provided with a dry powder fire extinguisher for emergency handling in case of fire, while the rainproof eaves can provide shade and shelter for users.

[0004] However, the above-mentioned disclosed solution has the following shortcomings: the above-mentioned solution uses a cooling fan to cool and dissipate heat when in use, but the above-mentioned device does not have a protection structure for the photovoltaic circuit before grid connection, so that current reverse flow may occur in actual use. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the present invention to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0006] The purpose of the present invention is to address the technical problems existing in the background technology. The present invention proposes a photovoltaic grid-connected cabinet. The present invention can effectively improve the protection effect of photovoltaic modules through this device. Since the working conditions of photovoltaic modules are different, the voltage and current generated by each photovoltaic module are different during actual use, which makes the high-voltage photovoltaic module produce a reverse voltage effect on the low-voltage photovoltaic module. The device can ensure that voltage reverse current will not occur in this device through the independent docking structure and the structure of the unidirectional diode.

[0007] The utility model proposes a photovoltaic grid-connected cabinet, which includes a shell and a cover plate rotatably connected to the side thereof, a handle connected to the outer end surface of the cover plate, a control panel connected to the top of the shell, the control panel is provided with a display screen, the control panel is provided with a plurality of control buttons, a mounting bracket is connected to the side of the shell, a plurality of docking pipes are connected through the bottom of the shell, a ventilation component is connected to the inner wall of the shell, and the inner wall of the shell is connected to the grid-connected component.

[0008] By adopting the above technical solution, the present solution can effectively improve the operating efficiency of the device through the combination of a display screen and a plurality of control buttons, so that the current working status of the device can be judged through the interaction of the display screen.

[0009] Preferably, the ventilation component includes a ventilation window connected to the outer side of the shell, a rotating bracket is connected to the side of the inner wall of the shell, the rotating bracket is provided with a motor, the output end of the motor is connected to a paddle, the paddle is facing the ventilation window, and a protective cover is connected to the inner wall of the shell, and the protective cover is provided above the paddle.

[0010] By adopting the above technical solution, the present solution can achieve the effect of ventilation inside the shell of the device through the combination of the blades and the ventilation windows, thereby reducing the temperature inside the shell.

[0011] Preferably, the grid-connected component includes a mounting plate connected to the side of the inner wall of the shell, the mounting plate is connected to a docking base, the docking base is threadedly connected to a locking piece, the outer arc surface of the locking piece is slidably connected to a pressing piece, and a limiting groove is provided on the top of the docking base, and the limiting groove is located directly below the pressing piece.

[0012] By adopting the above technical solution, the present solution can achieve stable docking connection of the device through the combination of the docking base and the pressing member, thereby reducing the risk of malfunction of the device due to accidental loosening of the cable.

[0013] Preferably, the mounting plate is connected to a shielding cover, and the mounting plate is connected to several unidirectional diodes, which are electrically connected to the docking base. A primary coil is provided inside the shielding cover, and several unidirectional diodes are electrically connected in parallel with the primary coil at one end away from the docking base. Several secondary coils are connected to the side of the mounting plate, and the secondary coils are arranged on the side of the primary coil. The mounting plate is connected to an output connector, and the output connector is electrically connected to the secondary coil.

[0014] By adopting the above technical solution, the present solution can effectively improve the magnetic induction boosting effect of the present device through the combination of the primary coil and the secondary coil, thereby making the output voltage of the present device easy to use.

[0015] Preferably, the mounting plate is provided with a plurality of docking bases, and the plurality of docking bases correspond one-to-one to the docking pipes provided at the bottom of the shell.

[0016] By adopting the above technical solution, this solution can enable multiple groups of photovoltaic modules to be independently connected to each other through the one-to-one corresponding combination of docking bases and docking pipes, thereby avoiding problems such as chain short circuits.

[0017] Preferably, the mounting bracket is provided with a plurality of mounting limit holes.

[0018] By adopting the above technical solution, the present solution can effectively improve the installation and fixing efficiency of the device through the combination of the installation bracket and the installation limit hole.

[0019] In summary, the present invention has at least one of the following beneficial effects:

[0020] This device can achieve a voltage boosting effect through a combination of a primary coil and a secondary coil, thereby boosting the voltage generated by the photovoltaic module to a voltage range that is convenient for use, ensuring stable power usage of the device. At the same time, this device can achieve internal heat dissipation and cooling effects through structures such as blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a front view of an embodiment of a photovoltaic grid-connected cabinet of the utility model;

[0023] Figure 2 This is a structural diagram of the butt joint in an embodiment of the present utility model;

[0024] Figure 3 This is a schematic structural diagram of the ventilation component in an embodiment of the present utility model;

[0025] Figure 4 This is a schematic structural diagram of the grid-connected components in an embodiment of the present utility model;

[0026] Figure markings: 1. Shell; 2. Cover; 3. Handle; 4. Control panel; 5. Display; 6. Control button; 7. Mounting bracket; 8. Docking pipe; 9. Ventilation component; 901. Ventilation window; 902. Rotating bracket; 903. Blade; 904. Protective cover; 10. Grid-connected component; 1001. Mounting plate; 1002. Docking base; 1003. Locking member; 1004. Pressing member; 1005. Shielding cover; 1006. Output connector; 1007. Insulation plate; 1008. Primary coil; 1009. Secondary coil; 1010. One-way diode. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-4 The utility model is described in further detail.

[0028] Example 1, as Figures 1-4 As shown, in order to solve the existing problems, in this embodiment, the utility model discloses a photovoltaic grid-connected cabinet, including a shell 1 and a cover plate 2 rotatably connected to its side, a handle 3 is connected to the outer end face of the cover plate 2, a control panel 4 is connected to the top of the shell 1, the control panel 4 is provided with a display screen 5, and the control panel 4 is provided with a plurality of control buttons 6, a mounting bracket 7 is connected to the side of the shell 1, a plurality of docking pipes 8 are connected through the bottom of the shell 1, a ventilation component 9 is connected to the inner wall of the shell 1, and a grid-connected component 10 is connected to the inner wall of the shell 1.

[0029] The ventilation component 9 includes a ventilation window 901 connected to the outer side of the shell 1, a rotating bracket 902 is connected to the side of the inner wall of the shell 1, the rotating bracket 902 is provided with a motor, and a paddle 903 is connected to the output end of the motor. The paddle 903 faces the ventilation window 901, and a protective cover 904 is connected to the inner wall of the shell 1, and the protective cover 904 is arranged above the paddle 903.

[0030] The grid-connected component 10 includes a mounting plate 1001 connected to the side of the inner wall of the shell 1, the mounting plate 1001 is connected to a docking base 1002, the docking base 1002 is threadedly connected to a locking member 1003, the outer arc surface of the locking member 1003 is slidably connected to a pressing member 1004, and a limiting groove is provided on the top of the docking base 1002, and the limiting groove is located directly below the pressing member 1004.

[0031] The mounting plate 1001 is connected to a shielding cover 1005, and the mounting plate 1001 is connected to several unidirectional diodes 1010, which are electrically connected to the docking base 1002. A primary coil 1008 is provided inside the shielding cover 1005, and one end of the unidirectional diodes 1010 away from the docking base 1002 is electrically connected in parallel with the primary coil 1008. Several secondary coils 1009 are connected to the side of the mounting plate 1001, and the secondary coils 1009 are arranged on the side of the primary coil 1008. The mounting plate 1001 is connected to an output connector 1006, and the output connector 1006 is electrically connected to the secondary coil 1009.

[0032] The specific working principle is: this device can effectively achieve the effect of grid-connected boosting of multiple groups of photovoltaic modules, so that the photovoltaic power generation voltage is convenient for external electrical equipment to use. Compared with traditional devices, this device can ensure that each photovoltaic module is independent of each other through the structure of the unidirectional diode 1010, avoiding the situation where the voltage difference causes the current to flow back in the photovoltaic module.

[0033] When the device is in use, the ventilation component 9 can be used to dissipate heat and ventilate the interior of the shell 1, thereby avoiding problems such as overheating inside the device. When the device is docked with the photovoltaic module, the photovoltaic module cable enters the interior of the device shell 1 from the bottom docking tube 8, and the cable connection end is located between the docking base 1002 and the pressing member 1004. At this time, rotating the locking member 1003 can achieve the clamping docking effect of the device. The conical shape of the bottom of the docking tube 8 can generate sliding resistance to the cable, thereby avoiding the cable gravity pulling on the connection end.

[0034] Through the electrical connection inside the mounting plate 1001, the photovoltaic assembly is connected to the primary coil 1008 through the unidirectional diode 1010. When passing through the unidirectional diode 1010, since the photovoltaic assemblies are connected in parallel, when the output voltages of the photovoltaic assemblies are different, the high-voltage photovoltaic assembly will produce a current reverse flow effect on the low-voltage photovoltaic assembly. At this time, the unidirectional diode 1010 can prevent the current from flowing back and protect the photovoltaic assembly. The primary coil 1008 can generate a magnetic field through the electric energy generated by the photovoltaic assembly, and the secondary coil 1009 with more turns can generate an induced voltage, thereby enabling the device to achieve a boosting effect, thereby achieving the effect that the output voltage of the device is easy to use.

[0035] Example 2, as Figures 1-4 As shown, in order to solve the existing problems, based on the same concept as the above-mentioned embodiment 1, this photovoltaic grid-connected cabinet also includes: the mounting plate 1001 is provided with a plurality of docking bases 1002, and the plurality of docking bases 1002 correspond one-to-one to the docking pipes 8 provided at the bottom of the shell 1, and the mounting bracket 7 is provided with a plurality of mounting limit holes.

[0036] The specific working principle is: this device can effectively improve the installation and fixing efficiency of the grid-connected cabinet. When this device is used, the connection cables of multiple photovoltaic modules are passed into the interior of the device through independent docking pipes 8, thereby connecting with the docking structure inside the device, ensuring the docking accuracy and connection stability of the device.

[0037] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A photovoltaic grid-connected cabinet, comprising a housing (1) and a cover plate (2) rotatably connected to the side thereof, wherein the outer end surface of the cover plate (2) is connected to a handle (3), characterized in that: The top of the shell (1) is connected to a control panel (4), the control panel (4) is provided with a display screen (5), the control panel (4) is provided with a plurality of control buttons (6), the side of the shell (1) is connected to a mounting bracket (7), the bottom of the shell (1) is connected through a plurality of butt joint pipes (8), the inner wall of the shell (1) is connected to a ventilation component (9), and the inner wall of the shell (1) is connected to a grid connection component (10).

2. A photovoltaic grid-connected cabinet according to claim 1, characterized in that: The ventilation component (9) comprises a ventilation window (901) connected to the outer side of the shell (1); a rotating bracket (902) is connected to the side of the inner wall of the shell (1); the rotating bracket (902) is provided with a motor; a paddle (903) is connected to the output end of the motor; the paddle (903) faces the ventilation window (901); a protective cover (904) is connected to the inner wall of the shell (1); the protective cover (904) is provided above the paddle (903).

3. A photovoltaic grid-connected cabinet according to claim 2, characterized in that: The grid-connected component (10) comprises a mounting plate (1001) connected to the inner wall side of the housing (1); the mounting plate (1001) is connected to a docking base (1002); the docking base (1002) is threadedly connected to a locking member (1003); the outer arc surface of the locking member (1003) is slidably connected to a pressing member (1004); a limiting groove is provided on the top of the docking base (1002), and the limiting groove is located directly below the pressing member (1004).

4. A photovoltaic grid-connected cabinet according to claim 3, characterized in that: The mounting plate (1001) is connected to a shielding cover (1005), the mounting plate (1001) is connected to a plurality of unidirectional diodes (1010), the unidirectional diodes (1010) are electrically connected to the docking base (1002), a primary coil (1008) is provided inside the shielding cover (1005), one end of the plurality of unidirectional diodes (1010) away from the docking base (1002) is electrically connected in parallel to the primary coil (1008), a side of the mounting plate (1001) is connected to a plurality of secondary coils (1009), the secondary coils (1009) are arranged on the side of the primary coil (1008), the mounting plate (1001) is connected to an output connector (1006), and the output connector (1006) is electrically connected to the secondary coil (1009).

5. A photovoltaic grid-connected cabinet according to claim 4, characterized in that: The mounting plate (1001) is provided with a plurality of docking bases (1002), and the plurality of docking bases (1002) correspond one-to-one to the docking pipes (8) provided at the bottom of the shell (1).

6. A photovoltaic grid-connected cabinet according to claim 5, characterized in that: The mounting bracket (7) is provided with a plurality of mounting limit holes.

Images