Inverter box and inverter
By designing a differentiated fastener layout in the inverter box, the connection strength at the corner position is strengthened, and the problem of the inverter's sharp pressure rise in extreme cases is solved, achieving effective bomb risk control and safety improvement.
Patent Information
- Application Number
- CN202421647088.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-12
AI Technical Summary
In extreme cases, if the internal short circuit or components are damaged, the internal pressure may rise sharply, and the existing breathable valves cannot release the pressure in time, resulting in safety hazards and bomber risks.
A inverter box is designed to strengthen the connection strength at the corner position of the inverter box through differentiated fastener layout and design. The fastener includes a first fastener provided at the corner position of the cover body and a second fastener in the non-corner position. The connecting strength of the first fastener is greater than the connecting strength of the second fastener so that in the case of emergency pressure relief, the non-corner position is preferred to break, and the corner position remains stable to prevent flying covers and sputtering.
Effectively control the risk of bombers, prevent the occurrence of flying covers and parts sputtering, and enhance the safety and stability of the inverter box.
Smart Images
Figure CN222869193U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of inverters, and in particular to an inverter box and an inverter. Background Art
[0002] In order to protect the internal electronic components from environmental factors such as dust and rain, the inverter usually needs to have a high IP protection level. In addition, the inverter will generate heat during operation, and an effective heat dissipation mechanism is required to maintain the normal operation of the equipment and extend its service life.
[0003] In practice, the inventors found that the existing inverters have the following defects. Although the existing inverter design has taken into account the needs of protection and heat dissipation, in some extreme cases, such as internal short circuit or component damage, the air pressure inside the inverter may rise sharply, causing the existing air valve to be unable to release pressure in time. In this case, the inverter box may face the risk of excessive internal pressure, which may cause the upper cover to lift, parts to splash, and even serious safety accidents such as explosion and fire. Utility Model Content
[0004] The purpose of the present application is to provide an inverter box, which, through a differentiated design, strengthens the connection strength of the corner position of the inverter box, thereby enhancing the risk control of explosion; in the case of emergency pressure relief, the non-corner position is broken first while the corner position remains stable, so that the cover can arch in the middle to relieve pressure, prevent the cover from flying and splashing, thereby effectively controlling the risk of explosion. Another purpose of the present application is to provide an inverter.
[0005] To achieve the above-mentioned purpose, the present application provides an inverter box, comprising a box body and a cover body, wherein the cover body is connected to the box body by fasteners, and the fasteners include a first fastener arranged at a corner position of the cover body and a second fastener arranged at a non-corner position of the cover body, the tightening torque of the first fastener and the second fastener are the same, and the connection strength between the cover body and the box body at the first fastener is greater than the connection strength between the cover body and the box body at the second fastener.
[0006] In some embodiments, the end surface thickness of the first fastener is greater than the end surface thickness of the second fastener.
[0007] In some embodiments, the cover body is provided with a locking structure for the rod of the fastener to pass through, and the thickness of the locking structure for the first fastener to pass through is greater than the thickness of the locking structure for the second fastener to pass through.
[0008] In some embodiments, the cover body is provided with a locking structure for the rod of the fastener to pass through, and the outer periphery of the locking structure for the first fastener to pass through is provided with reinforcing ribs.
[0009] In some embodiments, the outer periphery of the locking structure through which the second fastener is passed is provided with reinforcing ribs;
[0010] The number of reinforcing ribs on the outside of the first fastener is greater than the number of reinforcing ribs on the outside of the second fastener; and / or,
[0011] The structural strength of the reinforcing ribs outside the first fastener is greater than the structural strength of the reinforcing ribs outside the second fastener.
[0012] In some embodiments, the outer periphery of the locking structure through which the second fastener is passed is provided with reinforcing ribs;
[0013] The end face of the reinforcing rib outside the first fastener is not lower than the end face of the locking structure through which the first fastener passes, and the end face of the reinforcing rib outside the second fastener is lower than the end face of the locking structure through which the second fastener passes.
[0014] In some embodiments, the locking structure is provided with a locking hole, and the diameter of the locking hole for the first fastener to pass through is smaller than the diameter of the locking hole for the second fastener to pass through.
[0015] In some embodiments, the locking structure is provided with a locking hole, and the depth of the locking hole for the first fastener to pass through is greater than the depth of the locking hole for the second fastener to pass through.
[0016] In some embodiments, a gasket is further included between the fastener and the cover body, and the cross-sectional area of the gasket between the first fastener and the cover body is greater than the cross-sectional area of the gasket between the second fastener and the cover body.
[0017] The present application also provides an inverter, comprising the above-mentioned inverter box.
[0018] Compared with the above-mentioned background technology, the inverter box provided in the present application mainly includes a box body and a cover body, the cover body and the box body are connected by fasteners, the fasteners include a first fastener arranged at a corner position of the cover body and a second fastener arranged at a non-corner position of the cover body, the tightening torque of the first fastener and the second fastener are the same, and the connection strength between the cover body and the box body at the first fastener is greater than the connection strength between the cover body and the box body at the second fastener.
[0019] Taking the solar photovoltaic power generation system as an example, the inverter is one of the core components, and its stability and safety are of vital importance. However, although the protection level of the inverter in the prior art can withstand daily environmental factors, in extreme cases, such as internal short circuit or component damage, the internal pressure of the inverter may rise sharply, and the existing breathable valve cannot release the pressure in time, resulting in safety hazards. The locking structure of the existing inverter may not provide sufficient strength to maintain the integrity of the box when facing a sharp pressure change, increasing the risk of equipment damage and safety accidents. In response to this technical problem and defect, the present application proposes an innovative inverter box design. The core of the design is to strengthen the connection strength of the corner position of the inverter box through differentiated fastener layout and design. Specifically, the inverter box includes a box body and a cover body, and the cover body is connected to the box body by fasteners. These fasteners include a first fastener arranged at the corner position of the cover body and a second fastener arranged at the non-corner position of the cover body. In terms of design, the fastening torques of the first fastener and the second fastener are the same, and the connection strength between the cover and the box at the first fastener is particularly strengthened to ensure that it is greater than the connection strength between the cover and the box at the second fastener.
[0020] The advantage of this differentiated design is that when the internal pressure of the inverter rises sharply due to a fault, the second fastener at the non-corner position will break first due to its relatively low connection strength. This design allows the cover to arch in the middle part for pressure relief, rather than flying up as a whole, thereby effectively preventing the occurrence of flying covers and parts splashing. At the same time, the first fastener at the corner position can remain stable during the pressure relief process due to its higher connection strength, ensuring that the cover will not completely detach from the box, thereby effectively controlling the risk of explosion. Among them, the corner position can refer to the four corners, and the non-corner position can be any position on the edge between adjacent corners.
[0021] Combined with the above structure and process description, it can be seen that the inverter box has at least the following beneficial effects: the inverter box strengthens the connection strength of the corner position of the inverter box through differentiated design, thereby enhancing the risk control of explosion; in the case of emergency pressure relief, the non-corner position breaks first while the corner position remains stable, so that the cover can arch in the middle to relieve pressure, prevent flying cover and splashing, thereby effectively controlling the risk of explosion. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.
[0023] Figure 1A schematic diagram of an inverter box and an inverter provided in an embodiment of the present application;
[0024] Figure 2 A schematic diagram of the position of fasteners provided in an embodiment of the present application;
[0025] Figure 3 A schematic diagram of a locking structure of a first fastener provided in an embodiment of the present application;
[0026] Figure 4 A schematic diagram of the locking structure of the second fastener provided in an embodiment of the present application.
[0027] in:
[0028] Box body 1 , cover body 2 , locking structure 21 , locking hole 211 , fastener 3 . DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0030] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0031] In response to the problems of flying covers and sputtering caused by the inability to release the internal pressure of the inverter in time in the prior art, the present application provides an inverter box, which is equivalent to an improvement on the existing solutions such as waterproof breathable valves. It can meet the working conditions of the inverter under normal working conditions. When the sharply increased heat cannot be released quickly, pressure relief measures are taken to prevent flying covers and sputtering, thereby enhancing the risk control of machine explosion, without increasing costs, being safer, and being more user-friendly.
[0032] Please refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of an inverter box and an inverter provided in an embodiment of the present application, Figure 2 A schematic diagram of the locations of fasteners provided in an embodiment of the present application.
[0033] In a first specific embodiment, the inverter box provided by the embodiment of the present application mainly includes a box body 1 and a cover body 2, the cover body 2 is connected to the box body 1 by a fastener 3, the fastener 3 includes a first fastener arranged at a corner position of the cover body 2 and a second fastener arranged at a non-corner position of the cover body 2, the tightening torque of the first fastener and the second fastener are the same, and the connection strength between the cover body 2 and the box body 1 at the first fastener is greater than the connection strength between the cover body 2 and the box body 1 at the second fastener.
[0034] It should be explained that the same tightening torque of the first fastener and the second fastener means that during the tightening process, the same torque value needs to be applied whether tightening the first fastener or the second fastener, in order to ensure that each bolt can achieve the same pre-tightening force, thereby ensuring the uniformity and reliability of the connection. On this basis, the connection strength between the cover body 2 and the box body 1 at the first fastener and the connection strength between the cover body 2 and the box body 1 at the second fastener are treated differently to achieve the purpose of risk control.
[0035] Taking the solar photovoltaic power generation system as an example, the inverter is one of the core components, and its stability and safety are of vital importance. However, although the protection level of the inverter in the prior art can withstand daily environmental factors, in extreme cases, such as internal short circuit or component damage, the internal pressure of the inverter may rise sharply, and the existing breathable valve cannot release the pressure in time, resulting in safety hazards. The locking structure of the existing inverter may not provide sufficient strength to maintain the integrity of the box body 1 when facing a sharp pressure change, increasing the risk of equipment damage and safety accidents. In response to this technical problem and defect, the present application proposes an innovative inverter box design. The core of the design is to strengthen the connection strength of the corner position of the inverter box through the differentiated fastener 3 layout and design. Specifically, the inverter box includes a box body 1 and a cover body 2, and the cover body 2 is connected to the box body 1 by fasteners 3. These fasteners 3 include a first fastener arranged at the corner position of the cover body 2 and a second fastener arranged at the non-corner position of the cover body 2. In terms of design, the connection strength between the cover body 2 and the box body 1 at the first fastener is particularly strengthened to ensure that it is greater than the connection strength between the cover body 2 and the box body 1 at the second fastener.
[0036] The advantage of this differentiated design is that when the internal pressure of the inverter rises sharply due to a fault, the second fasteners at non-corner positions will break first due to their relatively low connection strength. This design allows the cover 2 to arch in the middle part for pressure relief, rather than flying up as a whole, thereby effectively preventing the occurrence of flying covers and parts splashing. At the same time, the first fasteners at the corner positions can remain stable during the pressure relief process due to their higher connection strength, ensuring that the cover 2 will not completely detach from the box body 1, thereby effectively controlling the risk of explosion. Among them, the corner position can refer to the four corners, and the non-corner position can be any position on the edge between adjacent corners.
[0037] Combined with the above structure and process description, it can be seen that the inverter box has at least the following beneficial effects: the inverter box strengthens the connection strength of the corner position of the inverter box through differentiated design, thereby enhancing the risk control of explosion; in the case of emergency pressure relief, the non-corner position breaks first while the corner position remains stable, so that the cover body 2 can arch in the middle to relieve pressure, prevent flying cover and splashing, thereby effectively controlling the risk of explosion.
[0038] Please continue to refer to Figure 2 , it is explained that the corner position can refer to the four corners, and the non-corner position can be any position on the edge between adjacent corners. Figure 2 The A in the figure indicates four corner positions, corresponding to the corner positions, i.e., the four corner positions. At this time, the first fasteners can be installed at the four A positions one by one. Figure 2 The B points in the figure indicate four straight edge positions, corresponding to non-corner positions, i.e., any positions on the edges between adjacent corners. At this time, the second fasteners can be installed one by one at the four B point positions. In addition, any position among the four B point positions can be selected to install the second fastener, and the remaining B point positions can be installed with the first fastener, which should also fall within the scope of the description of this application.
[0039] In some cases, the inverter box further includes an upper cover sealing strip, which provides a sealing function when the cover 2 is installed with the box 1. The waterproof breathable valve can be selectively arranged on the box 1, the cover 2 or other structures, which should also belong to the description scope of this application.
[0040] In some cases, the inverter box and its component structures can be manufactured by die-casting, sheet metal and other processes. For example, the cover 2 can be made of die-casting or sheet metal, which should fall within the scope of the description of this application.
[0041] In some cases, the model and specifications of the first fastener and the second fastener can be the same or different, but it should be noted that no matter which model and specification is selected, the connection position of the cover body 2 and the box body 1 needs to be differentiated to ensure that the locking strength of the four corners is much better than the locking strength of the middle, that is, Figure 2 The structural strength of point A is obviously stronger than that of point B, so that when the explosion-proof valve fails to release pressure in time, the middle structure B breaks first, the four corners A remain locked, the middle of the cover body 2 arches up to release pressure, and no splashing occurs.
[0042] The specific method for achieving the differentiated design of the locking strength, ie the connection strength, will be described below. Optionally, the fastener 3 is a screw.
[0043] Please refer to Figure 3 to Figure 4 , Figure 3 A schematic diagram of a locking structure of a first fastener provided in an embodiment of the present application, Figure 4 A schematic diagram of the locking structure of the second fastener provided in an embodiment of the present application.
[0044] In some embodiments, the end surface thickness of the first fastener is greater than the end surface thickness of the second fastener. Optionally, the first fastener is a first screw, and the second fastener is a second screw.
[0045] In this embodiment, the end face thickness of the first fastener and the second fastener refers to the thickness of the fastener head, in other words, the thickness of the portion of the fastener before the thread starts.
[0046] The design of the end face thickness is critical to the purpose and function of the screw. For example, in some applications, a larger end face thickness may be required to ensure that the screw can withstand large shear forces or provide sufficient support area.
[0047] In particular, when the first screw and the second screw are of different models, the end face thickness of the first screw is greater than the end face thickness of the second screw. In other words, by increasing the end face thickness of the first screw, the locking strength at the corner position, i.e., the four corner positions (at A), can be enhanced.
[0048] In some embodiments, the cover body 2 is provided with a locking structure 21 for the rod of the fastener 3 to pass through, and the thickness of the locking structure 21 for the first fastener to pass through is greater than the thickness of the locking structure 21 for the second fastener to pass through.
[0049] In this embodiment, the thickness of the locking structure 21 for the first fastener to pass through and the locking structure 21 for the second fastener to pass through refers to the vertical distance supporting the end faces of the first fastener and the second fastener. Therefore, in some applications, a larger thickness of the locking structure 21 may be required to ensure that the screw can withstand a larger shear force or provide sufficient support area.
[0050] In particular, when the models of the first screw and the second screw are different, the thickness of the locking structure 21 for the first screw to pass through is greater than the thickness of the locking structure 21 for the second screw to pass through. In other words, by increasing the thickness of the locking structure 21 for the first screw to pass through, the locking strength at the corner position, i.e., the four corners (A), can be enhanced.
[0051] In some embodiments, the cover body 2 is provided with a locking structure 21 for the rod of the fastener 3 to pass through, and the outer periphery of the locking structure 21 for the first fastener to pass through is provided with reinforcing ribs.
[0052] In this embodiment, by providing reinforcing ribs on the periphery of the locking structure 21 for the first fastener to pass through, but not providing reinforcing ribs on the periphery of the locking structure 21 for the second fastener to pass through, the locking strength at the corner positions, i.e., the four corner positions (A), can be enhanced.
[0053] In other embodiments, reinforcing ribs are provided on both the periphery of the locking structure 21 for the first fastener to pass through and the periphery of the locking structure 21 for the second fastener to pass through, that is, reinforcing ribs are provided on the periphery of the locking structure 21 for the second fastener to pass through, and the reinforcing ribs at the two positions are designed differently.
[0054] Specifically, in one embodiment, the number of reinforcing ribs on the outside of the first fastener is greater than the number of reinforcing ribs on the outside of the second fastener, which can enhance the locking strength at the corner positions, namely, the four corner positions (A).
[0055] In another embodiment, the structural strength of the reinforcement ribs on the outside of the first fastener is greater than the structural strength of the reinforcement ribs on the outside of the second fastener. The difference may be in terms of size and structure. For example, making the reinforcement ribs on the outside of the first fastener wider and larger can enhance the locking strength at the corner positions, i.e., the four corners (A).
[0056] In other embodiments, reinforcing ribs are also provided at the same time, that is, reinforcing ribs are provided on the periphery of the locking structure 21 for the second fastener to pass through, but the methods of differentiated design of the reinforcing ribs at the two positions are different.
[0057] Specifically, the end face of the reinforcing rib outside the first fastener is not lower than the end face of the locking structure 21 through which the first fastener is passed, and the end face of the reinforcing rib outside the second fastener is lower than the end face of the locking structure 21 through which the second fastener is passed, which can enhance the locking strength at the corner position, i.e., the four corner positions (A).
[0058] In other embodiments, any combination of any of the methods in the above embodiments can also be used, as long as the locking strength at the corner position, i.e., the four corner positions (A), can be enhanced, and it should also fall within the scope of the description of this application.
[0059] In some embodiments, the locking structure 21 is provided with a locking hole 211 , and the diameter of the locking hole 211 through which the first fastener passes is smaller than the diameter of the locking hole 211 through which the second fastener passes.
[0060] Combination Figure 3 and Figure 4 It can be seen that the diameter of the locking hole 211 for the first fastener to pass through is D1, and the diameter of the locking hole 211 for the second fastener to pass through is D2, so D1<D2.
[0061] The diameter of the locking hole 211 will affect the connection strength between the locking structure 21 and the fastener 3. For example, if the diameter is too large, the contact area between the fastener 3 and the hole wall of the locking hole 211 will be reduced, resulting in reduced friction. When subjected to load, this may cause the fastener to move relative to the hole, reducing the firmness of the connection. In addition, due to the large diameter, the fastener 3 is prone to loosening under vibration or load changes.
[0062] In particular, when the first screw and the second screw are of the same model, the diameter D1 of the locking hole 211 for the first screw to pass through is smaller than the diameter D2 of the locking hole 211 for the second screw to pass through. In other words, by reducing the diameter D1 of the locking hole 211 for the first screw to pass through, the locking strength at the corner position, i.e., the four corners (A), can be enhanced.
[0063] In some embodiments, the locking structure 21 is provided with a locking hole 211 , and the depth of the locking hole 211 for the first fastener to pass through is greater than the depth of the locking hole 211 for the second fastener to pass through.
[0064] Combination Figure 3 and Figure 4 It can be seen that the depth of the locking hole 211 for the first fastener to pass through is H1, and the depth of the locking hole 211 for the second fastener to pass through is H2, so H1>H2.
[0065] The depth of the locking hole 211 will affect the connection strength between the locking structure 21 and the fastener 3. For example, insufficient depth of the locking hole 211 will reduce the actual contact length. When subjected to load, this may cause relative movement of the fastener 3 in the hole, reducing the firmness of the connection.
[0066] In particular, when the first screw and the second screw are of the same model, the depth H1 of the locking hole 211 for the first screw to pass through is greater than the depth H2 of the locking hole 211 for the second screw to pass through. In other words, by increasing the depth H1 of the locking hole 211 for the first screw to pass through, the locking strength at the corner position, i.e., the four corner positions (A), can be enhanced.
[0067] In some embodiments, a gasket is further included between the fastener 3 and the cover body 2 , and the cross-sectional area of the gasket between the first fastener and the cover body 2 is greater than the cross-sectional area of the gasket between the second fastener and the cover body 2 .
[0068] Such a design means that the gasket between the first fastener and the cover body 2 can provide a larger contact area, thereby increasing the pressure distribution range at the connection of the first fastener, reducing local stress concentration, improving the firmness and reliability of the connection, and enhancing the locking strength at the corner position, i.e., the four corners (A).
[0069] The present application also provides an inverter, comprising the above-mentioned inverter box.
[0070] The inverter should have all the beneficial effects of the above-mentioned inverter box, which will not be described in detail here.
[0071] It should be noted that many of the components mentioned in this application are universal standard parts or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or through conventional experimental methods.
[0072] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.
[0073] The inverter box and inverter provided by the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.
Claims
1. An inverter box, characterized in that: It includes a box body and a cover body, the cover body and the box body are connected by fasteners, the fasteners include a first fastener arranged at a corner position of the cover body and a second fastener arranged at a non-corner position of the cover body, the first fastener and the second fastener have the same tightening torque, and the connection strength between the cover body and the box body at the first fastener is greater than the connection strength between the cover body and the box body at the second fastener.
2. The inverter box according to claim 1, characterized in that: The end surface thickness of the first fastening member is greater than the end surface thickness of the second fastening member.
3. The inverter box according to claim 1, characterized in that: The cover body is provided with a locking structure for the rod of the fastener to pass through, and the thickness of the locking structure for the first fastener to pass through is greater than the thickness of the locking structure for the second fastener to pass through.
4. The inverter box according to claim 1, characterized in that: The cover body is provided with a locking structure for the rod of the fastener to pass through, and the outer periphery of the locking structure for the first fastener to pass through is provided with reinforcing ribs.
5. The inverter box according to claim 4, characterized in that: The outer periphery of the locking structure through which the second fastener is passed is provided with reinforcing ribs; The number of reinforcing ribs on the outside of the first fastener is greater than the number of reinforcing ribs on the outside of the second fastener; and / or, The structural strength of the reinforcing ribs outside the first fastener is greater than the structural strength of the reinforcing ribs outside the second fastener.
6. The inverter box according to claim 4, characterized in that: The outer periphery of the locking structure through which the second fastener is passed is provided with reinforcing ribs; The end face of the reinforcing rib outside the first fastener is not lower than the end face of the locking structure through which the first fastener passes, and the end face of the reinforcing rib outside the second fastener is lower than the end face of the locking structure through which the second fastener passes.
7. The inverter box according to claim 3, characterized in that: The locking structure is provided with a locking hole, and the diameter of the locking hole for the first fastener to pass through is smaller than the diameter of the locking hole for the second fastener to pass through.
8. The inverter box according to claim 3, characterized in that: The locking structure is provided with a locking hole, and the depth of the locking hole for the first fastener to penetrate is greater than the depth of the locking hole for the second fastener to penetrate.
9. The inverter box according to claim 1, characterized in that: It also includes a gasket disposed between the fastener and the cover body, wherein the cross-sectional area of the gasket between the first fastener and the cover body is greater than the cross-sectional area of the gasket between the second fastener and the cover body.
10. An inverter, characterized in that: Comprising the inverter box as claimed in any one of claims 1 to 9.