Photovoltaic inverter

Abstract

The utility model discloses a photovoltaic inverter. The photovoltaic inverter comprises a main body, a locking strip and a connecting strip. The main body comprises a bottom shell and an upper cover, a mounting groove is formed in the bottom shell, and the upper cover covers the bottom shell and seals the mounting groove; the locking piece is arranged on the upper cover in a penetrating manner and locks the upper cover on the bottom shell; the first end of the connecting strip is connected with the upper cover, and the second end of the connecting strip is connected with the bottom shell. According to the photovoltaic inverter provided by the utility model, the connecting strip is arranged, and the upper cover is connected to the bottom shell through the connecting strip, so that when the upper cover is impacted by explosion venting gas and is separated from the bottom shell, the upper cover can be connected to the bottom shell through the connecting strip, and people and objects around the photovoltaic inverter cannot be accidentally injured due to the fact that the upper cover flies around; the safety of the photovoltaic inverter in the use process can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of inverter devices, and in particular to a photovoltaic inverter. Background Art

[0002] A photovoltaic inverter (PV inverter or solar inverter) is a device that converts the variable DC voltage generated by photovoltaic (PV) solar panels into AC power at the mains frequency. This inverter can feed electrical energy back to the commercial power transmission system or be used by off-grid power grids. It is one of the important balance of systems (BOS) in a photovoltaic array system and can be used with general AC-powered equipment.

[0003] At present, the standards for photovoltaic inverters are constantly updated, and the safety requirements are getting higher and higher. Due to the presence of various electronic components in the machine, various working conditions exist during operation. The more components there are in severe conditions, the greater the probability of failure. Various components have different failure modes, which may produce explosive gas, which will impact the upper cover and cause the upper cover to fly out and accidentally injure people and objects around the photovoltaic inverter, posing a relatively high safety hazard. Utility Model Content

[0004] The main purpose of the utility model is to provide a photovoltaic inverter to solve the problem that the upper cover of the photovoltaic inverter in the prior art is easy to fly out under the impact of the explosion-proof gas.

[0005] According to one aspect of the utility model, a photovoltaic inverter is provided, comprising:

[0006] A main body, the main body comprising a bottom shell and an upper cover, the bottom shell is provided with a mounting groove, the upper cover is arranged on the bottom shell and seals the mounting groove;

[0007] a locking member, the locking member being disposed on the upper cover and locking the upper cover on the bottom shell; and

[0008] A connecting bar, wherein a first end of the connecting bar is connected to the upper cover, and a second end of the connecting bar is connected to the bottom shell.

[0009] Furthermore, the connecting bar includes a connecting chain.

[0010] Furthermore, the connecting strips include conductive strips.

[0011] Furthermore, the first end and the second end of the connecting strip are detachably connected to the bottom shell and the upper cover via a connecting mechanism.

[0012] Furthermore, the connecting mechanism comprises:

[0013] A connecting piece, the first end and the second end of the connecting strip are both provided with the connecting piece, and the connecting piece is provided with a connecting hole;

[0014] A locking piece, the bottom shell and the upper cover are both fixedly provided with the locking piece, the locking piece is provided with a stud, and the stud is passed through the connecting hole;

[0015] A locking nut is sleeved on the stud to lock the connecting piece on the locking piece.

[0016] Further, the locking piece on the bottom shell is arranged on the inner wall surface of the mounting groove; and / or,

[0017] The locking piece on the upper cover is arranged on the bottom surface of the upper cover.

[0018] Furthermore, the locking piece and the upper cover, as well as the locking piece and the bottom shell are connected by welding.

[0019] Furthermore, a connecting column is disposed at the first end and the second end of the connecting strip, and the connecting piece is connected to the end of the connecting column and extends along the radial direction of the connecting column.

[0020] Furthermore, the locking member includes a locking screw, a locking buckle or a locking pin.

[0021] Furthermore, there are a plurality of locking members, and the plurality of locking members are arranged at intervals along the circumference of the mounting groove.

[0022] In the utility model, during actual assembly, the installation groove on the bottom shell is used to install electronic components and other components that need to be sealed. After the electronic components are installed, the upper cover is placed on the bottom shell. The installation groove can be sealed by the upper cover. During the assembly process, the upper cover is locked on the bottom shell by a locking member, and a connecting strip is also connected between the upper cover and the bottom shell. When the components inside the photovoltaic inverter generate explosion-proof gas, and the impact force of the explosion-proof gas on the upper cover is greater than the locking force of the locking member on the upper cover, the upper cover will separate from the bottom shell. At this time, the upper cover can be restrained by the connecting strip to prevent the upper cover from flying off the bottom shell under the impact of the explosion-proof gas and accidentally injuring people and objects around the photovoltaic inverter.

[0023] It can be seen that in the utility model, a connecting strip is provided, and the connecting strip connects the upper cover to the bottom shell. When the upper cover is impacted by the explosion-releasing gas and separated from the bottom shell, the connecting strip can connect the upper cover to the bottom shell without flying around and accidentally injuring people and objects around the photovoltaic inverter, thereby improving the safety of the photovoltaic inverter in the utility model during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0025] Figure 1 This is a three-dimensional structural diagram of the photovoltaic inverter disclosed in the embodiment of the present application when the upper cover is closed;

[0026] Figure 2 A three-dimensional structural diagram of the photovoltaic inverter disclosed in the embodiment of the present application when the upper cover is opened

[0027] Figure 3 for Figure 2 Magnified view of the M region in FIG.

[0028] The above drawings include the following reference numerals:

[0029] 10. Main body; 11. Bottom shell; 111. Installation groove; 12. Upper cover; 21. Locking piece; 22. Connecting strip; 221. Connecting column; 30. Connecting mechanism; 31. Connecting piece; 32. Locking piece; 321. Stud; 33. Locking nut. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0033] As mentioned in the background technology, when the existing photovoltaic inverter generates explosive gas, it is easy to impact the upper cover, causing the upper cover to fly out and accidentally injure people and objects around the photovoltaic inverter, which poses a high safety hazard. To this end, the present application provides a new photovoltaic inverter, which will not blow the upper cover away when generating explosive gas, and can reduce the safety hazard during the use of the photovoltaic inverter.

[0034] The photovoltaic inverter of the present application will be described in detail below with reference to the accompanying drawings.

[0035] See also Figures 1 to 3 As shown, according to an embodiment of the present application, a photovoltaic inverter is provided. The photovoltaic inverter includes a main body 10 , a locking member 21 and a connecting bar 22 .

[0036] Among them, the main body 10 includes a bottom shell 11 and an upper cover 12, the bottom shell 11 is provided with a mounting groove 111, the upper cover 12 is covered on the bottom shell 11 and seals the mounting groove 111; the locking piece 21 is passed through the upper cover 12 and locks the upper cover 12 on the bottom shell 11; the first end of the connecting strip 22 is connected to the upper cover 12, and the second end of the connecting strip 22 is connected to the bottom shell 11.

[0037] During actual assembly, the installation groove 111 on the bottom shell 11 is used to install components that need to be sealed, such as electronic components. After installing the electronic components, the upper cover 12 is placed on the bottom shell 11. The installation groove 111 can be sealed by the upper cover 12. During the assembly process, the upper cover 12 is locked on the bottom shell 11 by the locking member 21, and a connecting strip 22 is also connected between the upper cover 12 and the bottom shell 11. When the components inside the photovoltaic inverter generate explosion-proof gas, and the impact force of the explosion-proof gas on the upper cover 12 is greater than the locking force of the locking member 21 on the upper cover 12, the upper cover 12 will separate from the bottom shell 11. At this time, the upper cover 12 can be restrained by the connecting strip 22 to prevent the upper cover 12 from flying off the bottom shell 11 under the impact of the explosion-proof gas and accidentally injuring people and objects around the photovoltaic inverter.

[0038] That is to say, in this embodiment, by providing the connecting strip 22 and connecting the upper cover 12 to the bottom shell 11, when the upper cover 12 is impacted by the explosion-proof gas and separated from the bottom shell 11, the connecting strip 22 can connect the upper cover 12 to the bottom shell 11 without flying around and accidentally injuring people and objects around the photovoltaic inverter, thereby improving the safety of the photovoltaic inverter in this embodiment during use.

[0039] Specifically, the main body 10 in this embodiment can be set in a cube, a rectangular parallelepiped, a cylinder, an elliptical body or other special shapes. Figure 1 The main body 10 is generally a rectangular parallelepiped. The bottom shell 11 in this embodiment is generally a rectangular parallelepiped structure, the upper cover 12 is a plate-like structure, and the bottom shell 11 is provided with the above-mentioned mounting groove 111, which is convenient for mounting electronic components and the like.

[0040] Optionally, the locking member 21 in this embodiment may be a locking screw, a locking buckle, a locking pin, etc. Figure 1 In the figure, the locking member 21 is shown as a locking screw. In order to stably lock the upper cover 12 on the bottom shell 11, in this embodiment, a plurality of locking members 21 are provided, and the plurality of locking members 21 are arranged at intervals along the circumference of the mounting groove 111, so as to ensure the stability of the connection between the upper cover 12 and the bottom shell 11.

[0041] In order to meet the sealing level requirements of the photovoltaic inverter, a sealing strip (not shown in the figure) is further provided in the gap between the upper cover 12 and the bottom shell 11 in the present embodiment. The sealing strip may be a sealing rubber strip or other structure. Through the action of the sealing strip, the gap between the upper cover 12 and the bottom shell 11 can be sealed to prevent external water or dust from entering the installation groove 111.

[0042] Furthermore, the connection bar 22 in this embodiment includes a connection chain. In this embodiment, by setting the connection bar 22 as a connection chain, the structure is simple and the stability is higher, and the upper cover 12 can be reliably connected to the bottom shell 11. Of course, in other embodiments of the present application, the connection bar 22 can also be set as a connection rubber strip, a connection rod, etc., as long as it is other deformation methods under the conception of the present application, they are all within the protection scope of the present application.

[0043] In this embodiment, when the photovoltaic inverter is working, some charges will exist on the upper cover 12. In this embodiment, the connecting strip 22 is set as a conductive strip, which can transfer the charges carried by the upper cover 12 to the bottom shell 11. When the bottom shell 11 is installed on the ground or other structures connected to the ground, the conductive strip can play a grounding function. Such a setting can avoid the hidden danger of electric shock when outsiders touch the upper cover 12, which can further improve the safety of use of the photovoltaic inverter in this embodiment.

[0044] For example, the connecting strip 22 in this embodiment can be made of iron, steel or other conductive materials. As long as it is other deformation methods under the concept of this application, it is within the protection scope of this application.

[0045] Combination Figure 2 and Figure 3 As shown, the first end and the second end of the connecting bar 22 in this embodiment are both detachably connected to the bottom shell 11 and the upper cover 12 through a connecting mechanism 30. In this embodiment, the connecting mechanism 30 is provided to fix the two ends of the connecting bar 22 to the upper cover 12 and the bottom shell 11, respectively, so as to facilitate the disassembly and assembly of the connecting bar 22.

[0046] Specifically, the connection mechanism 30 in this embodiment includes a connection piece 31, a locking piece 32 and a locking nut 33. The first end and the second end of the connection bar 22 are both provided with the above-mentioned connection piece 31, and the connection piece 31 is provided with a connection hole (not shown in the figure); the bottom shell 11 and the upper cover 12 are both fixedly provided with the above-mentioned locking piece 32, and the locking piece 32 is provided with a stud 321, and the stud 321 is inserted into the connection hole; the locking nut 33 is sleeved on the stud 321 to lock the connection piece 31 on the locking piece 32. During actual assembly, the connection pieces 31 at both ends of the connection bar 22 are connected to the stud 321, specifically, the connection piece 31 is sleeved on the stud 321 through the connection hole, and then the connection piece 31 is locked on the connection piece 31 by using the locking nut 33, which has a simple structure and is easy to operate.

[0047] Of course, in other embodiments of the present application, the connecting mechanism 30 may not be provided with the connecting piece 31, and the stud 321 may be directly fixedly installed on the bottom shell 11 and the upper cover 12. Figure 3The figure shows a case where the connecting mechanism 30 at one end of the connecting strip 22 is provided with a connecting piece 31, while the connecting mechanism 30 at the other end is not provided with a connecting piece 31. When the connecting mechanism 30 is provided with a connecting piece 31, the connecting piece 31 can be fixed to the bottom shell 11 or the upper cover 12 by welding, and the structure is stable and reliable and not easy to fall off. When the connecting mechanism 30 is not provided with a connecting piece 31, the stud 321 can be directly welded to the bottom shell 11 or the upper cover 12. As long as it is other deformation methods under the conception of the present application, they are all within the protection scope of the present application.

[0048] It should be noted that, in order to ensure the grounding continuity of the photovoltaic inverter, the connection mechanism 30 in this embodiment also needs to be made of conductive material.

[0049] In a specific embodiment of the present application, the locking piece 32 on the bottom shell 11 is arranged on the inner wall surface of the mounting groove 111; and the locking piece 32 on the upper cover 12 is arranged on the bottom surface of the upper cover 12 (that is, the side of the upper cover 12 close to the bottom of the mounting groove 111). With this arrangement, when the upper cover 12 is placed on the bottom shell 11, there is no need to open a hole or groove between the bottom shell 11 and the upper cover 12 to avoid the connecting strip 22. After the photovoltaic inverter is assembled, the connecting strip 22 is located in the space formed by the upper cover 12 and the bottom shell 11, and will not affect the sealing performance of the photovoltaic inverter.

[0050] Furthermore, in this embodiment, the first and second ends of the connecting strip 22 are both provided with a connecting column 221, and the connecting piece 31 is connected to the end of the connecting column 221 and extends in the radial direction of the connecting column 221. Compared with the method of not providing the connecting column 221, the structure of this embodiment is more convenient for processing and production, and has higher structural strength and stability. At the same time, in this embodiment, by connecting the connecting piece 31 to the end of the connecting column 221 (the end away from the main body of the connecting strip 22) and extending in the radial direction of the connecting column 221, the connecting column 221 is not easy to interfere with the upper cover 12 and the bottom shell 11, and it is more suitable for connecting the connecting piece 31 to the stud 321.

[0051] In combination with the above-mentioned embodiments, it can be known that the upper cover 12 of the photovoltaic inverter of the present application is only locked by a locking screw (M5 locking screw, torque 2.5N*m), and the upper cover 12 and the bottom shell 11 are sealed. A connecting hinge is added between the upper cover 12 and the bottom shell 11. When the pressure inside the photovoltaic inverter is very high at the moment of explosion, the upper cover 12 will be separated from the bottom shell 11. The setting of the connecting chain can prevent the upper cover 12 from flying around and accidentally injuring people and objects around the photovoltaic inverter. At the same time, the connecting strip 22 in the present application adopts a conductive strip,

[0052] The grounding continuity problem between the upper cover 12 and the bottom shell 11 can be solved, and the upper cover 12 can be prevented from being charged and causing safety hazards when people touch the upper cover. Optionally, the length of the connecting hinge in this embodiment is usually not less than 20 cm. At the moment of explosion release, the energy is very large. The connecting hinge has a certain length. After the explosion release, the energy has been released, and the upper cover 12 can be fixed so that it does not separate from the bottom shell 11, thereby improving the safety performance of the photovoltaic inverter.

[0053] In summary, the photovoltaic inverter of the present application effectively improves the safety brought by explosion relief without increasing costs and affecting the product, and can be widely used in the explosion relief suppression scheme of photovoltaic grid-connected inverters. It has a simple structure, low cost and better effect.

[0054] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0055] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A photovoltaic inverter, characterized in that: include: A main body (10), the main body (10) comprising a bottom shell (11) and an upper cover (12), the bottom shell (11) being provided with a mounting groove (111), the upper cover (12) being arranged on the bottom shell (11) and sealing the mounting groove (111); A locking member (21), the locking member (21) being passed through the upper cover (12) and locking the upper cover (12) onto the bottom shell (11); and A connecting strip (22), wherein a first end of the connecting strip (22) is connected to the upper cover (12), and a second end of the connecting strip (22) is connected to the bottom shell (11).

2. The photovoltaic inverter according to claim 1, characterized in that: The connecting bar (22) comprises a connecting chain.

3. The photovoltaic inverter according to claim 1, characterized in that: The connecting strip (22) comprises a conductive strip.

4. The photovoltaic inverter according to claim 1, characterized in that: The first end and the second end of the connecting strip (22) are both detachably connected to the bottom shell (11) and the upper cover (12) via a connecting mechanism (30).

5. The photovoltaic inverter according to claim 4, characterized in that: The connecting mechanism (30) comprises: A connecting piece (31), the first end and the second end of the connecting strip (22) are both provided with the connecting piece (31), and the connecting piece (31) is provided with a connecting hole; A locking piece (32), the bottom shell (11) and the upper cover (12) are both fixedly provided with the locking piece (32), the locking piece (32) is provided with a stud (321), and the stud (321) is inserted into the connecting hole; A locking nut (33), wherein the locking nut (33) is sleeved on the stud (321) to lock the connecting piece (31) on the locking piece (32).

6. The photovoltaic inverter according to claim 5, characterized in that: The locking piece (32) on the bottom shell (11) is arranged on the inner wall surface of the mounting groove (111); and / or, The locking piece (32) on the upper cover (12) is arranged on the bottom surface of the upper cover (12).

7. The photovoltaic inverter according to claim 5, characterized in that: The locking piece (32) and the upper cover (12), as well as the locking piece (32) and the bottom shell (11) are all connected by welding.

8. The photovoltaic inverter according to claim 5, characterized in that: The first end and the second end of the connecting strip (22) are both provided with connecting columns (221), and the connecting piece (31) is connected to the end of the connecting column (221) and extends in the radial direction of the connecting column (221).

9. The photovoltaic inverter according to any one of claims 1 to 8, characterized in that: The locking member (21) comprises a locking screw, a locking buckle or a locking pin.

10. The photovoltaic inverter according to any one of claims 1 to 8, characterized in that: There are a plurality of locking members (21), and the plurality of locking members (21) are arranged at intervals along the circumference of the mounting groove (111).

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