Inverter box body

By setting fixed and pressure relief areas on the inverter box, and using fixed and elastic connecting components to form a pressure relief gap, the cover plate disengagement problem caused by the increase in internal air pressure of the inverter box is solved, safe pressure relief protection is achieved, and the safety of the inverter is improved.

CN223218990UActive Publication Date: 2025-08-12SOLAR POWER NETWORK TECHNOLOGY (ZHEJIANG) CO LTD
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Patent Information

Application Number
CN202422146735.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-02
Publication Date
2025-08-12
Estimated Expiration
2034-09-02

AI Technical Summary

Technical Problem

When the existing inverter box is over-used, the internal air pressure increases, causing the cover plate to break away from the box, posing a safety hazard and damaging the inverter.

Method used

A fixed area and a pressure relief area are provided on the inverter box. The cover plate is fixedly connected to the fixed area through a fixed connection assembly, and connected to the cover plate in the pressure relief area through an elastic connection assembly. The elastic connection assembly deforms when subjected to impact force to form a pressure relief gap to relieve internal pressure.

Benefits of technology

It effectively prevents the inverter box from rupturing or explosion due to excessive internal pressure, improves safety and protection capabilities, and prevents the cover from flying out of the cover and causing safety hazards.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an inverter box body. The inverter box body comprises a box body, a fixed connection assembly and an elastic connection assembly. Wherein the box body comprises a main body, an opening is formed in the main body, a cover plate is arranged at the opening, and a fixing area and a pressure relief area are arranged on the main body. The fixed connection assembly is used for fixedly connecting the cover plate to the fixed area. The elastic connecting assembly comprises a connecting part and a locking part, the connecting part is clamped to the pressure relief area, the locking part penetrates through the cover plate to be connected with the connecting part, and the connecting part is configured to deform when being subjected to internal impact force of the box body so that a pressure relief gap can be formed between the cover plate and the body. The problem that in the prior art, the air pressure in the inverter box body is too large, so that the cover plate is easily struck away, and potential safety hazards exist can be solved.
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Description

Technical Field

[0001] The utility model relates to the technical field of inverters, and in particular to an inverter box. Background Art

[0002] At present, when the inverter box of the existing technology is overused, the internal capacitors and other electronic components are prone to short circuit and generate gas, which causes the pressure inside the inverter box to increase, and exerts a large impact force on the cover, causing the cover to detach from the box and fly out, which can easily damage the inverter and pose certain safety hazards. Utility Model Content

[0003] The main purpose of the present utility model is to provide an inverter box to at least solve the problem that when the internal air pressure of the inverter box is too high, a large impact force is generated on the cover plate, causing the cover plate to fly out of the box, resulting in damage to the inverter and a safety hazard.

[0004] According to one aspect of the present invention, an inverter box is provided, comprising:

[0005] The box body includes a main body, an opening is provided on the main body, a cover is provided at the opening, and a fixing area and a pressure relief area are provided on the main body;

[0006] A fixed connection assembly, the fixed connection assembly being used to fixedly connect the cover plate to the fixed area;

[0007] An elastic connecting component includes a connecting portion and a locking portion, the connecting portion is clamped in the pressure relief area, the locking portion passes through the cover plate and is connected to the connecting portion, and the connecting portion is configured to deform when subjected to an impact force inside the box body so as to form a pressure relief gap between the cover plate and the main body.

[0008] Furthermore, the connecting part includes an elastic clip and a connecting nut, the elastic clip is clipped to the pressure relief area, the elastic clip is provided with a limiting cavity, the connecting nut is installed in the limiting cavity, the locking part includes a connecting screw passing through the cover plate and connected to the connecting nut, the elastic clip is elastically deformed by the impact force inside the box body so that the connecting screw drives the connecting nut to at least partially disengage from the limiting cavity.

[0009] Furthermore, the elastic clip includes two opposite sides provided with bent spring buckles, and the elastic clip is clamped to the pressure relief area through the bent spring buckles. The bent spring buckles at least partially protrude toward the inner side of the limiting cavity to confine the connecting nut to the limiting cavity. The bent spring buckles are elastically deformed by the impact force inside the box body so that the connecting screw drives the connecting nut to at least partially detach from the limiting cavity.

[0010] Furthermore, the fixed connection assembly includes a fixed connection portion and a locking portion, the fixed connection portion is fixedly connected to the fixed area, and the locking portion passes through the cover plate and is connected to the fixed connection portion.

[0011] Furthermore, the fixed connection portion includes a locking block and a connecting sleeve, the locking block is locked and connected to the main body, the connecting sleeve is arranged on the locking block, and the connecting sleeve is provided with a connecting hole for fixedly connecting the locking portion.

[0012] Furthermore, auxiliary connection parts are respectively provided on two opposite sides of the locking block, and the auxiliary connection parts are used to lock the locking block to the main body.

[0013] Furthermore, the locking block and the connecting sleeve are integrally formed.

[0014] Furthermore, the locking portion includes a fastening screw, the connecting hole includes a threaded hole, and the fastening screw passes through the cover plate and is connected to the threaded hole.

[0015] Furthermore, the auxiliary connection portion includes a rivet, a screw or a bolt.

[0016] Furthermore, the fixed connection assembly further includes a gasket, and the locking portion passes through the gasket and is connected to the fixed connection portion.

[0017] In the utility model, a cover is provided at the opening of the main body and a fixed area and a pressure relief area are provided on the main body, the cover plate is fixedly connected to the fixed area through a fixed connection component, and the cover plate is connected to the pressure relief area through an elastic connection component. The connecting part of the elastic connection component is clamped in the pressure relief area, and the locking part of the elastic connection component passes through the cover plate and is connected to the connecting part. When the connecting part is subjected to the impact force inside the box, a pressure relief gap is formed in the pressure relief area. The pressure inside the box is discharged through the pressure relief gap, thereby preventing the box or the electronic components inside the box from being damaged due to the internal impact force, thereby enhancing the safety of the inverter box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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 of the present invention. In the drawings:

[0019] Figure 1 A three-dimensional structural diagram of the inverter box disclosed in an embodiment of the present utility model;

[0020] Figure 2 A three-dimensional structural diagram of a fixed connection assembly disclosed in an embodiment of the present utility model;

[0021] Figure 3 A cross-sectional view of the fixed connection assembly disclosed in an embodiment of the present utility model

[0022] Figure 4 A three-dimensional structural diagram of the elastic connection assembly disclosed in an embodiment of the present utility model;

[0023] Figure 5 A cross-sectional view of the elastic connection assembly disclosed in an embodiment of the present utility model;

[0024] Figure 6 This is a three-dimensional structural diagram of the elastic connection assembly disclosed in an embodiment of the present utility model when it is separated from the pressure relief area;

[0025] Figure 7 This is a cross-sectional view of a fixed connection assembly when a gasket is provided on the inverter box disclosed in an embodiment of the present utility model.

[0026] The above drawings include the following reference numerals:

[0027] 10. Box body; 11. Main body; 111. Fixed area; 112. Pressure relief area; 12. Cover plate; 121. Through hole; 20. Fixed connection assembly; 21. Fixed connection part; 211. Locking block; 212. Connecting sleeve; 2121. Connecting hole; 213. Auxiliary connection part; 22. Locking part; 23. Gasket; 30. Elastic connection assembly; 31. Connection part; 311. Elastic clip; 3111. Limiting cavity; 3112. Bending snap buckle; 312. Connecting nut; 32. Locking part; 40. Sealing ring. DETAILED DESCRIPTION

[0028] 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.

[0029] 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 present invention. 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, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0030] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0031] As described in the background art, when the inverter box of the prior art is overused, the electronic components inside are prone to short circuits and explosions or gas generation, which leads to an increase in the pressure inside the inverter box, exerting a large impact force on the cover plate, causing the cover plate to detach from the box and fly out, which can easily damage the inverter and pose certain safety hazards. Therefore, the present application provides an inverter box, which is provided with an explosion-proof structure having a fixed area and a pressure relief area on the inverter box. The fixed area is connected to the cover plate by a fixed connection component, and the pressure relief area is connected to the cover plate by an elastic connection component. When a large air pressure is generated inside the inverter box, the elastic connection component will be deformed by the impact force to form a pressure relief gap in the pressure relief area between the cover plate and the main body. The formed pressure relief gap can vent the interior of the inverter box, thereby preventing the air pressure from damaging the internal components of the inverter box or blowing off the box cover of the inverter box, thereby improving the safety of the inverter box. The inverter of the present invention will be introduced and explained in detail below with reference to the accompanying drawings.

[0032] See also Figures 1 to 7 As shown, according to an embodiment of the present application, an inverter case 10 is provided, comprising a case 10, a fixed connection assembly 20 and an elastic connection assembly 30. The case 10 comprises a main body 11, an opening is provided on the main body 11, a cover plate 12 is provided at the opening, and a fixed area 111 and a pressure relief area 112 are provided on the main body 11. The fixed connection assembly 20 is used to fix the cover plate 12 to the fixed area 111. The elastic connection assembly 30 comprises a connecting portion 31 and a locking portion 32, the connecting portion 31 is clamped in the pressure relief area 112, the locking portion 32 passes through the cover plate 12 and is connected to the connecting portion 31, and the connecting portion 31 is configured to deform when subjected to an impact force inside the case 10 so as to form a pressure relief gap between the cover plate 12 and the main body 11.

[0033] Because this embodiment provides a fixed area 111 and a pressure relief area 112 on the main body 11 of the box body 10, and provides a fixed connection component 20 for fixing the cover plate 12 to the fixed area 111, and provides an elastic connection component 30 in the pressure relief area 112 that can deform when subjected to impact force inside the box body 10 to form a pressure relief gap between the cover plate 12 and the main body 11, thereby forming a corresponding explosion-proof structure on the box body 10, which can prevent the box body 10 of the inverter from rupturing or exploding due to excessive internal impact force, and damage to electronic components inside the box body 10, thereby improving the safety protection capability of the box body 10 of the inverter. The cover plate 12 of this embodiment is also provided with a through hole 121 for the main body 11 and the fixed connection component 20 and the elastic connection component 30. The elastic connection component 30 includes a connecting portion 31 that is clamped in the pressure relief area 112, and a locking portion 32 that passes through the through hole 121 of the cover plate 12 and is connected to the connecting portion 31. The locking portion 32 is configured to deform when subjected to the impact force inside the box body 10 so as to form a pressure relief area 112 between the cover plate 12 and the main body 11. When the interior of the inverter box body 10 generates excessive internal pressure due to overheating or short circuit, the cover plate 12 will drive the locking portion 32 to squeeze the connecting portion 31, causing the connecting portion 31 to deform to a certain extent, thereby forming a pressure relief gap in the pressure relief area 112 between the cover plate 12 and the main body 11, so that the internal high-pressure gas can be quickly released to the outside, effectively preventing the box body 10 from rupturing or exploding due to excessive internal pressure, and providing an automatic pressure relief protection function.

[0034] It is understandable that the structure of the box body 10 of this embodiment can be of any shape, and the explosion relief structure can be set at any position of the box body 10, for example Figure 1 As shown in the figure, the box cover corresponding to the box body 10 is directly set as the cover plate 12, by setting a fixed area 111 and a pressure relief area 112 on the main body 11, and then the cover plate 12 is fixedly connected to the main body 11 in the fixed area 111 through the fixed connection component 20, and the cover plate 12 is connected to the box body 10 in the pressure relief area 112 through the elastic connection component 30. When the air pressure inside the box body 10 is too high, the pressure can be relieved through the pressure relief area 112. In other embodiments of this embodiment, the explosion relief structure can also be set separately on the box cover or separately on the main body 11 of the box body 10, both of which can achieve the explosion relief function. At least one fixed area 111 and at least one pressure relief area 112 are set at the opening of the main body 11 of this embodiment to ensure that explosion relief can be achieved while ensuring that the cover plate 12 does not separate from the main body 11, wherein a fixed area 111 is connected to the cover plate 12 by at least one fixed connection component 20, and a pressure relief area 112 is connected to the cover plate 12 by at least one elastic connection component 30.

[0035] Specifically, the connecting part 31 includes an elastic clip 311 and a connecting nut 312. The elastic clip 311 is clipped to the pressure relief area 112. The elastic clip 311 is provided with a limiting cavity 3111. The connecting nut 312 is installed in the limiting cavity 3111. The locking part 32 includes a connecting screw that passes through the through hole 121 of the cover plate 12 and is connected to the connecting nut 312. The elastic clip 311 is elastically deformed by the impact force inside the box body 10 so that the connecting screw drives the connecting nut 312 to at least partially disengage from the limiting cavity 3111. The elastic clamping member 311 of this embodiment includes bent spring buckles 3112 provided on two opposite sides. The elastic clamping member 311 is clamped to the pressure relief area 112 through the bent spring buckles 3112. The bent spring buckles 3112 at least partially protrude toward the inner side of the limiting cavity 3111 to confine the connecting nut 312 to the limiting cavity 3111. The bent spring buckles 3112 are elastically deformed by the impact force inside the box body 10 so that the connecting screw drives the connecting nut 312 to at least partially disengage from the limiting cavity 3111.

[0036] In this embodiment, by providing bent spring buckles 3112 on opposite sides of the elastic clamping member 311 that are clamped in the pressure relief area 112 and at least partially protrude toward the inner side of the limiting cavity 3111 to confine the connecting nut 312 in the limiting cavity 3111, and the locking portion 32 is provided as a connecting screw that passes through the through hole 121 of the cover plate 12 and is connected to the connecting nut 312, when a certain pressure is generated inside the box body 10 of the inverter, the cover plate 12, due to its relatively large force-bearing area, drives the connecting screw to displace, further driving the connecting nut 312 to displace, and the connecting nut 312 is squeezed to confine itself in the limiting cavity 3111. The bent spring buckle 3112 in the limiting cavity 3111, after the bent spring buckle 3112 is deformed, the connecting nut 312 moves in the direction away from the elastic clip 311, so that the connecting nut 312 is at least partially separated from the limiting cavity 3111. Since the cover plate 12 is fixedly connected to the fixed area 111 of the main body 11 through the fixed connection assembly 20, a pressure relief gap is formed in the pressure relief area 112 between the cover plate 12 and the main body 11, so that the air pressure inside the box body 10 overflows from the pressure relief gap, realizing the explosion relief function of the box body 10 of the inverter, which can prevent the cover plate from flying out and causing safety hazards, thereby improving the safety of the inverter.

[0037] Further, see Figure 6As shown, when the air pressure inside the inverter box 10 is greater than a certain value, the bent spring buckle 3112 will undergo a large deformation, thereby squeezing the position in contact with the pressure relief area 112. When the squeezing reaches a certain degree, the connecting nut 312 will completely disengage from the limiting cavity 3111 of the elastic clip 311, and the connecting screw drives the connecting nut 312 to disengage from the connecting part 31. At this time, the connecting nut 312 has disengaged from the limiting cavity 3111, and the cover plate 12 is deformed. A relatively large pressure relief gap is generated in the pressure relief area 112 between the cover plate 12 and the main body 11. After the pressure relief is completed inside the box 10, the connecting nut 312 will not return to the limiting cavity 3111.

[0038] Specifically, the fixed connection assembly 20 includes a fixed connection portion 21 fixedly connected to the fixed area 111, and a locking portion 22 passing through a through hole 121 of the cover plate 12 and connected to the fixed connection portion 21. The fixed connection portion 21 includes a locking block 211 and a connecting sleeve 212. The locking block 211 is locked and connected to the main body 11, and the connecting sleeve 212 is provided on the locking block 211. The connecting sleeve 212 is provided with a connecting hole 2121 for fixedly connecting to the locking portion 22. By providing the connecting sleeve 212 on the locking block 211 locked and connected to the main body 11, and providing the connecting hole 2121 on the connecting sleeve 212 for fixed connection with the locking portion 22, the stability of the connection between the fixed connection portion 21 and the locking portion 22 is ensured. The stable connection mechanism reduces component damage caused by air pressure extrusion or connection failure within the inverter case 10.

[0039] In this embodiment, auxiliary connection portions 213 are provided on opposite sides of the locking block 211, respectively, and the auxiliary connection portions 213 are used to lock the locking block 211 to the main body 11. In this embodiment, by providing auxiliary connection portions 213 on opposite sides of the locking block 211 for locking the locking block 211 to the main body 11, the auxiliary connection portions 213 on both sides of the locking block 211 can more firmly fix the locking block 211 to the main body 11, thereby increasing the connection strength between the locking block 211 and the main body 11 and preventing damage to the connection between the locking block 211 and the main body 11 when subjected to a large force.

[0040] Furthermore, the locking block 211 and the connecting sleeve 212 in this embodiment are integrally formed. By integrally forming the locking block 211 and the connecting sleeve 212, when the locking block 211 is locked and connected to the main body 11, the connecting sleeve 212 is connected to the locking portion 22 through the connecting hole 2121, and the locking block 211 and the connecting sleeve 212 are not separated. The integrally formed setting can provide a higher strength between the locking block 211 and the connecting sleeve 212. When the internal air pressure of the inverter case 10 exceeds the atmospheric pressure and squeezes the cover plate 12, the locking block 211 and the connecting sleeve 212 can withstand a greater force so that the cover plate 12 will not separate from the main body 11. In addition, during actual processing, there is no need to splice and assemble the locking block 211 and the connecting sleeve 212, which can reduce the production cost of the inverter case 10 in this embodiment to a certain extent.

[0041] Furthermore, the auxiliary connection part 213 in this embodiment can be configured as a rivet, a screw, or a bolt. The auxiliary connection part 213 in this embodiment is preferably connected by riveting with rivets. When the auxiliary connection part 213 is a rivet, the rivet directly passes through the rivet hole for auxiliary connection in the fixing area 111 and then rivets with the auxiliary connection part 213, which can reduce the cost of the manufacturing process while ensuring the stability of the connection. When the auxiliary connection part 213 is a screw, it directly passes through the threaded hole for auxiliary connection in the fixing area 111 on the inverter case 10 and then connects with the threaded hole for auxiliary connection on the locking block 211. When the auxiliary connection part 213 is a bolt, the bolt also includes a nut, which is used to stabilize the bolt after the bolt is passed through the fixing area 111 and the auxiliary connection part 213 of the inverter case 10.

[0042] Specifically, the locking portion 22 includes a fastening screw, and the connecting hole 2121 includes a threaded hole. The fastening screw passes through the through hole 121 of the cover plate 12 corresponding to the fixing area 111 and connects with the threaded hole of the connecting hole 2121. The threaded connection ensures that the connection between the fixed connecting portion 21 and the locking portion 22 is reliable and has sufficient strength and rigidity to withstand external vibration, impact, and internal pressure, preventing the components from loosening or falling off.

[0043] Alternatively, see Figure 7 As shown, the fixed connection assembly 20 of this embodiment further includes a gasket 23, through which the locking portion 22 is connected to the fixed connection portion 21. In this embodiment, the provision of the gasket 23 increases the contact area between the locking portion 22 and the cover plate 12, thereby strengthening the connection strength between the fixing area 111 of the main body 11 and the cover plate 12, thereby preventing the cover plate 12 from being pulled off.

[0044] It is understood that the fixing areas 111 of this embodiment are preferably located on opposite sides of the opening of the main body 11, and the pressure relief areas 112 are preferably located on the other two sides of the opening. By arranging the fixing areas 111 on the opposite sides of the opening, it is possible to ensure that the cover plate 12 is subjected to uniform force when fixed, thereby improving the connection stability and sealing between the cover plate 12 and the main body 11, while also helping to disperse the stress that may be generated within the box body 10 and enhancing the stability of the overall structure. By arranging the pressure relief areas 112 on the other two sides of the opening, it is possible to more effectively guide the internal high-pressure gas or liquid to be released outward, ensuring that the box body 10 can maintain a balanced stress state when subjected to internal pressure, reducing structural deformation or damage caused by uneven force.

[0045] In this embodiment, a sealing ring 40 is further provided between the main body 11 and the cover plate 12. When the cover plate 12 covers the opening of the main body 11, the sealing ring 40 seals the connection between the cover plate 12 and the main body 11, thereby improving the sealing performance of the inverter housing 10. The provision of the sealing ring 40 can enhance the dust and water resistance of the inverter housing 10, reduce the risk of inverter failure and short circuit caused by external factors, and thus improve the safety and reliability of the inverter.

[0046] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. 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 figures. For example, if the device in the 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.

[0047] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An inverter box, characterized in that: include: A box body (10), the box body (10) comprises a main body (11), the main body (11) is provided with an opening, a cover plate (12) is provided at the opening, and the main body (11) is provided with a fixing area (111) and a pressure relief area (112); a fixed connection assembly (20), the fixed connection assembly (20) being used to fixedly connect the cover plate (12) to the fixed area (111); An elastic connection assembly (30) includes a connection portion (31) and a locking portion (32), wherein the connection portion (31) is engaged with the pressure relief area, the locking portion (32) passes through the cover plate (12) and is connected to the connection portion (31), and the connection portion (31) is configured to deform when subjected to an impact force inside the box body (10) so as to form a pressure relief gap between the cover plate (12) and the main body (11).

2. The inverter box according to claim 1, characterized in that: The connecting portion (31) comprises an elastic clamping member (311) and a connecting nut (312); the elastic clamping member (311) is clamped to the pressure relief area (112); the elastic clamping member (311) is provided with a limiting cavity (3111); the connecting nut (312) is installed in the limiting cavity (3111); the locking portion (32) comprises a connecting screw passing through the cover plate (12) and connected to the connecting nut (312); the elastic clamping member (311) is elastically deformed by the impact force inside the box body (10) so that the connecting screw drives the connecting nut (312) to at least partially disengage from the limiting cavity (3111).

3. The inverter box according to claim 2, characterized in that: The elastic clamping member (311) includes two opposite sides provided with bent spring buckles (3112), the elastic clamping member (311) is clamped to the pressure relief area (112) through the bent spring buckles (3112), the bent spring buckles (3112) at least partially protrude toward the inner side of the limiting cavity (3111) to limit the connecting nut (312) to the limiting cavity (3111), and the bent spring buckles (3112) are elastically deformed by the impact force inside the box body (10) so that the connecting screw drives the connecting nut (312) to at least partially escape from the limiting cavity (3111).

4. The inverter box according to any one of claims 1 to 3, characterized in that: The fixed connection assembly (20) comprises a fixed connection portion (21) and a locking portion (22), wherein the fixed connection portion (21) is fixedly connected to the fixed area (111), and the locking portion (22) passes through the cover plate (12) and is connected to the fixed connection portion (21).

5. The inverter box according to claim 4, characterized in that: The fixed connection portion (21) comprises a locking block (211) and a connecting sleeve (212); the locking block (211) is locked and connected to the main body (11); the connecting sleeve (212) is arranged on the locking block (211); and the connecting sleeve (212) is provided with a connecting hole (2121) for fixedly connecting the locking portion (22).

6. The inverter box according to claim 5, characterized in that: Auxiliary connection parts (213) are respectively provided on opposite sides of the locking block (211), and the auxiliary connection parts (213) are used to lock the locking block (211) to the main body (11).

7. The inverter box according to claim 5, characterized in that: The locking block (211) and the connecting sleeve (212) are integrally formed.

8. The inverter box according to claim 5, characterized in that: The locking portion (22) includes a fastening screw, the connecting hole (2121) includes a threaded hole, and the fastening screw passes through the cover plate (12) and is connected to the threaded hole.

9. The inverter box according to claim 6, characterized in that: The auxiliary connection part (213) includes a rivet, a screw or a bolt.

10. The inverter box according to claim 4, characterized in that: The fixed connection assembly (20) further includes a gasket (23), and the locking portion (22) passes through the gasket (23) to be connected to the fixed connection portion (21).