Single-phase photovoltaic grid-connected inverter

Abstract

The utility model relates to a single-phase photovoltaic grid-connected inverter, which belongs to the technical field of inverters and comprises a fixing frame and a buffer adjusting mechanism arranged in the fixing frame, the buffer adjusting mechanism comprises two mounting frames fixedly mounted in the fixing frame, fixing shafts are fixedly mounted in the mounting frames, and the fixing shafts are fixedly mounted in the fixing frames. The outer side of the fixing shaft is sleeved with a buffer spring fixedly connected with the mounting frame. According to the single-phase photovoltaic grid-connected inverter, when the fixing frame vibrates, the placing frame moves downwards to extrude the bearing plate and the supporting rods, so that the sliding blocks slide to extrude the buffer springs to enable the buffer springs to stretch out and draw back for buffering and vibration reduction, and meanwhile, a damper between the placing frame and the fixing frame is used for further buffering and vibration reduction; the stability of the inverter main body can be kept, heat air in the fixing frame can be discharged outwards by using a cooling fan, heat dissipation of the inverter main body is facilitated, faults such as overheating short circuit and the like of the inverter main body can be avoided, and the practicability of the device is improved.

Description

Technical Field

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

[0002] Photovoltaic is the abbreviation of solar photovoltaic power generation system. It is a new power generation system that uses the photovoltaic effect of solar cell semiconductor materials to directly convert solar radiation energy into electrical energy. It has two modes of operation: independent operation and grid-connected operation. At the same time, solar photovoltaic power generation systems are classified into two types: centralized, such as large-scale northwest ground photovoltaic power generation systems; and distributed, such as photovoltaic power generation systems on the roofs of industrial and commercial enterprise buildings and residential rooftop photovoltaic power generation systems.

[0003] The working circuit can just invert the power connected to the grid; it is found in the use of existing single-phase high-frequency photovoltaic grid-connected inverters that in hotter weather such as summer, the temperature and humidity inside the working chamber where the inverter is installed rise, which can easily cause the working circuit to overheat and short-circuit, and the inverter is generally located on an outdoor utility pole, so during installation, it is necessary to consider possible collisions, as well as vibrations caused by the influence of outdoor strong winds and other weather conditions that may cause damage to the inverter. Therefore, this application proposes another technical solution to this problem. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a single-phase photovoltaic grid-connected inverter, which has the advantages of convenient installation buffering of the inverter, as well as heat dissipation and ventilation of the inverter, and solves the problem that the working circuit only needs to be connected to the power grid for inversion; it is found in the use of existing single-phase high-frequency photovoltaic grid-connected inverters that in hotter weather such as summer, the temperature and humidity inside the working chamber where the inverter is installed rise, which can easily cause the working circuit to overheat and short-circuit, and the inverter is generally located on an outdoor utility pole. Therefore, during installation, it is necessary to consider possible collisions, as well as the problem of damage to the inverter caused by vibrations caused by the influence of outdoor strong winds and other weather conditions.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a single-phase photovoltaic grid-connected inverter, comprising a fixing frame, a buffer adjustment mechanism arranged inside the fixing frame;

[0006] The buffer adjustment mechanism comprises two mounting brackets fixedly installed inside the fixing bracket, a fixing shaft is fixedly installed inside the mounting bracket, a buffer spring fixedly connected to the mounting bracket is sleeved on the outer side of the fixing shaft, a slider slidably connected to the fixing shaft is fixedly installed on one side of the buffer spring, a support rod is hinged on the top of the slider, a bearing plate is hinged on the top of the support rod, and a placement bracket is fixedly installed on the top of the bearing plate;

[0007] A damper is fixedly connected between the placement rack and the inner bottom wall of the fixing rack, limit blocks slidably connected to the fixing rack are fixedly installed on the left and right sides of the placement rack, the top of the placement rack is movably connected to the inverter body, and a buffer pad that fits the inverter body is fixedly installed on the inner top wall of the fixing rack.

[0008] Furthermore, a heat dissipation component is provided on both sides of the fixed frame, and the heat dissipation component includes a mounting frame fixedly installed on the left and right sides of the fixed frame, a mounting plate is fixedly installed inside the mounting frame, a heat dissipation fan is fixedly installed on one side of the mounting plate, and a sealing door is provided inside the mounting frame.

[0009] Furthermore, a sliding groove is provided inside the sliding block, and the sliding block is slidably connected to the fixed shaft through the sliding groove.

[0010] Furthermore, a limiting groove is provided inside the mounting frame, and the sliding block is slidably connected to the mounting frame via the limiting groove.

[0011] Furthermore, movable grooves are provided on the left and right sides of the fixing frame, and the limit block is movably connected to the fixing frame through the movable grooves.

[0012] Furthermore, the inner walls on the left and right sides of the fixing frame are provided with mounting grooves, and the mounting frame is fixedly connected to the fixing frame through the mounting grooves.

[0013] Furthermore, a plurality of ventilation holes are provided inside the installation plate, and the ventilation holes are evenly distributed inside the installation plate.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] The single-phase photovoltaic grid-connected inverter has a buffer adjustment mechanism. When the fixing frame vibrates, the placement frame moves downward to squeeze the bearing plate and the support rod. The force-bearing side of the support rod moves downward and pushes the other end. The other end of the support rod pushes the slider to slide on the outside of the fixed shaft. The sliding of the slider squeezes the buffer spring to make it expand and contract for buffering and vibration reduction. At the same time, the damper between the placement frame and the fixing frame performs further buffering and vibration reduction, which helps to maintain the stability of the inverter body. The heat air inside the fixing frame can be discharged to the outside by using a cooling fan, which is convenient for heat dissipation of the inverter body, helps to avoid overheating and short circuit faults of the inverter body, and improves the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic cross-sectional view of the structure of the utility model;

[0017] Figure 2 It is a three-dimensional schematic diagram of the structure of the utility model.

[0018] In the figure: 1. fixing bracket; 2. mounting bracket; 3. fixing shaft; 4. buffer spring; 5. slider; 6. support rod; 7. bearing plate; 8. placement rack; 9. damper; 10. limit block; 11. inverter body; 12. buffer pad; 13. mounting frame; 14. mounting plate; 15. cooling fan; 16. sealing door. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-2 In this embodiment, a single-phase photovoltaic grid-connected inverter includes a fixing frame 1 and a buffer adjustment mechanism disposed inside the fixing frame 1 .

[0021] In this embodiment, the buffer adjustment mechanism includes two mounting frames 2 fixedly installed inside a fixed frame 1, a fixed shaft 3 is fixedly installed inside the mounting frame 2, a buffer spring 4 fixedly connected to the mounting frame 2 is mounted on the outer side of the fixed shaft 3, and a slider 5 slidably connected to the fixed shaft 3 is fixedly installed on one side of the buffer spring 4.

[0022] Among them, a sliding groove is opened inside the slider 5, and the slider 5 is slidably connected to the fixed shaft 3 through the sliding groove, which helps the slider 5 to slide on the fixed shaft 3 to retract and contract the buffer spring 4. A limiting groove is opened inside the mounting frame 2, and the slider 5 is slidably connected to the mounting frame 2 through the limiting groove, which helps the slider 5 to move smoothly. The top of the slider 5 is hinged with a support rod 6, and the top of the support rod 6 is hinged with a bearing plate 7, and the top of the bearing plate 7 is fixedly installed with a placement frame 8.

[0023] In this embodiment, a damper 9 is fixedly connected between the placement rack 8 and the inner bottom wall of the fixing rack 1, and limit blocks 10 slidably connected to the fixing rack 1 are fixedly installed on the left and right sides of the placement rack 8. Movable grooves are provided on the left and right sides of the fixing rack 1. The limit blocks 10 are movably connected to the fixing rack 1 through the movable grooves, which facilitates the limit blocks 10 to limit the placement rack 8. The top of the placement rack 8 is movably connected to the inverter body 11, and the inner top wall of the fixing rack 1 is fixedly installed with a buffer pad 12 that fits the inverter body 11.

[0024] Among them, heat dissipation components are arranged on the left and right sides of the fixing frame 1, and the heat dissipation components include a mounting frame 13 fixedly installed on the left and right sides of the fixing frame 1, and mounting grooves are provided on the inner walls on the left and right sides of the fixing frame 1. The mounting frame 13 is fixedly connected to the fixing frame 1 through the mounting grooves, which helps to install and fix the mounting frame 13. A mounting plate 14 is fixedly installed inside the mounting frame 13, and a plurality of air holes are opened inside the mounting plate 14, and the air holes are evenly distributed inside the mounting plate 14, which helps to ventilate and dissipate heat. A cooling fan 15 is fixedly installed on one side of the mounting plate 14, and a sealing door 16 is provided inside the mounting frame 13.

[0025] It should be noted that, the single-phase photovoltaic grid-connected inverter, through the buffer adjustment mechanism, when the fixed frame 1 vibrates, the placement frame 8 moves downward to squeeze the bearing plate 7 and the support rod 6, the force-bearing side of the support rod 6 moves downward and pushes the other end, the other end of the support rod 6 pushes the slider 5 to slide on the outside of the fixed shaft 3, the slider 5 slides to squeeze the buffer spring 4 to make it expand and contract for buffering and vibration reduction, and at the same time, the damper 9 between the placement frame 8 and the fixed frame 1 performs further buffering and vibration reduction, which helps to maintain the stability of the inverter body 11, and the heat dissipation fan 15 can be used to discharge the hot air inside the fixed frame 1 to the outside, which is convenient for heat dissipation of the inverter body 11, helps to avoid overheating and short circuit of the inverter body 11, and improves the practicability of the device.

[0026] The working principle of the above embodiment is:

[0027] When the single-phase photovoltaic grid-connected inverter is in use, the placement rack 8 is first pressed, and the placement rack 8 moves downward under the action of the limit block 10. The limit block 10 limits the placement rack 8 so that the placement rack 8 moves up and down smoothly. The placement rack 8 moves downward to squeeze the bearing plate 7 and the support rod 6. The force-bearing side of the support rod 6 moves downward and pushes the other end. The other end of the support rod 6 pushes the slider 5 to slide on the outside of the fixed shaft 3. The slider 5 slides to squeeze the buffer spring 4 to compress it, which can vacate the space between the placement rack 8 and the inside of the fixed rack 1, and the inverter body 11 can be placed on the placement rack 8. The buffer spring 4 is reset to hold the inverter body 11 in place. Between the placement frame 8 and the buffer pad 12, a reset pressure is always provided. Similarly, when subjected to external vibration, the placement frame 8 squeezes the bearing plate 7 and the support rod 6, thereby driving the slider 5 to move to compress and expand the buffer spring 4 for vibration reduction. At the same time, the damper 9 between the placement frame 8 and the fixed frame 1 performs further buffering and vibration reduction, which helps to maintain the stability of the inverter body 11. When the equipment is working and generating heat, the sealing door 16 can be opened and the cooling fan 15 can be started. The cooling fan 15 discharges the hot air inside the fixed frame 1 to the outside, which is convenient for dissipating heat to the inverter body 11, greatly improving the functionality and practicality of the device.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A single-phase photovoltaic grid-connected inverter, comprising a fixing frame (1), characterized in that: A buffer adjustment mechanism is arranged inside the fixing frame (1); The buffer adjustment mechanism comprises two mounting frames (2) fixedly mounted inside a fixing frame (1), a fixing shaft (3) fixedly mounted inside the mounting frame (2), a buffer spring (4) fixedly connected to the mounting frame (2) is sleeved on the outer side of the fixing shaft (3), a slider (5) slidably connected to the fixing shaft (3) is fixedly mounted on one side of the buffer spring (4), a support rod (6) is hinged on the top of the slider (5), a bearing plate (7) is hinged on the top of the support rod (6), and a placement frame (8) is fixedly mounted on the top of the bearing plate (7); A damper (9) is fixedly connected between the placement rack (8) and the inner bottom wall of the fixing rack (1); limit blocks (10) slidably connected to the fixing rack (1) are fixedly installed on both the left and right sides of the placement rack (8); the top of the placement rack (8) is movably connected to the inverter body (11); and a buffer pad (12) that fits the inverter body (11) is fixedly installed on the inner top wall of the fixing rack (1).

2. A single-phase photovoltaic grid-connected inverter according to claim 1, characterized in that: The left and right sides of the fixing frame (1) are both provided with heat dissipation components, and the heat dissipation components include a mounting frame (13) fixedly mounted on the left and right sides of the fixing frame (1), a mounting plate (14) fixedly mounted inside the mounting frame (13), a heat dissipation fan (15) fixedly mounted on one side of the mounting plate (14), and a sealing door (16) disposed inside the mounting frame (13).

3. A single-phase photovoltaic grid-connected inverter according to claim 1, characterized in that: A sliding groove is provided inside the sliding block (5), and the sliding block (5) is slidably connected to the fixed shaft (3) via the sliding groove.

4. The single-phase photovoltaic grid-connected inverter according to claim 1, characterized in that: A limiting groove is provided inside the mounting frame (2), and the sliding block (5) is slidably connected to the mounting frame (2) via the limiting groove.

5. The single-phase photovoltaic grid-connected inverter according to claim 1, characterized in that: The fixing frame (1) is provided with movable grooves on the left and right sides, and the limit block (10) is movably connected to the fixing frame (1) via the movable grooves.

6. A single-phase photovoltaic grid-connected inverter according to claim 2, characterized in that: The inner walls on the left and right sides of the fixing frame (1) are provided with mounting grooves, and the mounting frame (13) is fixedly connected to the fixing frame (1) via the mounting grooves.

7. A single-phase photovoltaic grid-connected inverter according to claim 2, characterized in that: A plurality of ventilation holes are provided inside the installation plate (14), and the ventilation holes are evenly distributed inside the installation plate (14).

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