Case and power conversion device

Abstract

The embodiment of the utility model discloses a case and power conversion equipment, and relates to the technical field of new energy equipment, the case comprises a case body, a case cover, a fastener and a connecting piece, and the case cover can open or close the case body; the fastener is arranged between the box body and the box cover, one end of the fastener is connected with the box body, and the other end of the fastener is connected with the box cover; one end of the connecting piece is connected with the box body, the other end of the connecting piece is connected with the box cover, the connecting piece comprises a buffering part, and the buffering part is configured to be capable of moving or deforming so that the box cover can move relative to the box body to form a pressure relief opening. According to the technical scheme provided by the embodiment of the invention, better explosion-proof performance of the case is realized, and the practicability and reliability of the case are improved.

Description

Technical Field

[0001] The embodiments in this application relate to the field of new energy equipment technology, and in particular to a chassis and power conversion device. Background Technology

[0002] In related technologies, power conversion equipment such as inverters and rectifiers can be equipped with chassis to house power devices and other components, thereby achieving overall protection of the power conversion equipment and ensuring its stable operation.

[0003] However, when power conversion equipment experiences faults such as thermal runaway, short circuits in some internal components can easily generate a large amount of gas. The accumulation of gas inside the chassis causes a sudden increase in air pressure, which can lead to the chassis cover or structural components being subjected to greater air pressure and rupturing. This poses certain safety hazards and reduces the practicality and structural reliability of the power conversion equipment. Utility Model Content

[0004] Several embodiments in this application propose a chassis and a power conversion device, aiming to achieve better explosion-proof performance of the chassis and improve its practicality and reliability.

[0005] One embodiment of this application provides a chassis including a chassis body, a cover, fasteners, and connectors. The cover is configured to open or close the chassis body. The fasteners are located between the chassis body and the cover, with one end connected to the chassis body and the other end connected to the cover. One end of the connectors is connected to the chassis body, and the other end is connected to the cover. The connectors include a buffer portion configured to move or deform, so that the cover moves relative to the chassis body to form a pressure relief port.

[0006] In one embodiment, the fastener includes a first fastening section, a second fastening section, and a shearing section. The first fastening section is connected to the housing; the second fastening section is connected to the housing cover; the shearing section connects the first fastening section and the second fastening section, and the structural strength of the shearing section is set to be less than the structural strength of the first fastening section and the second fastening section.

[0007] In one embodiment, the housing has an assembly hole on the side facing away from the cover, and the cover has a stud on the side facing the housing, with the stud opposite to the assembly hole. A first fastening section passes through the assembly hole, and a second fastening section is inserted into the stud and threadedly connected to it.

[0008] In one embodiment, the fastener is a magnetic component. The fastener is connected to the housing and magnetically engaged with the housing lid; alternatively, the fastener is connected to the housing lid and magnetically engaged with the housing housing.

[0009] In one embodiment, the connector is provided with a limiting hole, and the connector includes at least one rib, which is disposed in the limiting hole. The rib extends along a first direction, which is at an angle to the length direction of the connector. The limiting hole and the at least one rib form the buffer portion.

[0010] In one embodiment, the fastener is disposed through the side of the housing opposite to the cover, the fastener passes through the limiting hole, and abuts against the rib.

[0011] In one embodiment, the connector includes a first connecting segment, a second connecting segment, and an elastic element. The elastic element forms the buffer portion. The first connecting segment is connected to the lid, the second connecting segment is connected to the box body, one end of the elastic element is connected to the end of the first connecting segment away from the lid, and the other end of the elastic element is connected to the end of the second connecting segment away from the box body.

[0012] In one embodiment, the elastic element has a corrugated structure.

[0013] In one embodiment, the box body is provided with a perimeter, the perimeter is disposed opposite to the box cover, and the fastener connects the perimeter and the box cover; the connector includes a first connecting segment and a second connecting segment, the first connecting segment is connected to the box cover, the extension direction of the second connecting segment is set at an angle to the extension direction of the first connecting segment, and the second connecting segment is connected to the perimeter.

[0014] In one embodiment, the chassis further includes fixing screws that connect the chassis body and the chassis cover, and the fixing screws are arranged side by side with the fasteners spaced apart.

[0015] An embodiment of this application also proposes a power conversion device, the power conversion device including a power component and a chassis, the chassis being the aforementioned chassis, and the power component being disposed within the chassis.

[0016] In the various embodiments provided in this application, fasteners and connectors are used to connect the chassis and cover. The fasteners connect the chassis and cover, and the connectors connect the chassis and cover, achieving a stable assembly of the chassis and ensuring its protective effect on the internal components. When a component failure in the power conversion equipment causes a sudden increase in air pressure inside the chassis, the chassis and cover are subjected to air pressure, which can exert force on the fasteners, causing them to separate from the chassis. At this time, the cover can move away from the chassis under air pressure, forming a pressure relief vent, thereby allowing the gas generated inside the chassis to escape and effectively preventing excessive air pressure inside the chassis from causing an explosion. Meanwhile, by incorporating a buffer section into the connector, a certain buffering effect can be achieved by the movement or deformation of the buffer section when the cover is subjected to force and moves away from the enclosure. This helps maintain the connection between the connector and the enclosure and cover, better restricts the cover from detaching from the enclosure, prevents the cover from being subjected to large instantaneous pressure and flying off the enclosure, and prevents the flying cover from injuring the user. It also prevents the components inside the enclosure from being exposed and accidentally touched by the user, achieving better explosion-proof performance of the enclosure in the event of a power conversion equipment failure, and effectively improving the practicality and structural reliability of the enclosure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments or prior art of this application, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of an embodiment of the chassis provided in this application;

[0019] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0020] Figure 3 for Figure 1 An exploded view of the chassis of one embodiment;

[0021] Figure 4 for Figure 1 A cross-sectional view of one embodiment of the chassis;

[0022] Figure 5 for Figure 4 A magnified view of a section at point B in the middle;

[0023] Figure 6 for Figure 1 A schematic diagram of the structure of one embodiment of the fasteners for the chassis;

[0024] Figure 7 for Figure 1 A schematic diagram of the structure of one embodiment of the chassis connector;

[0025] Figure 8 This is a schematic diagram of another embodiment of the chassis provided in this application;

[0026] Figure 9 A schematic diagram of another embodiment of the connector for the chassis provided in this application.

[0027] Explanation of icon numbers:

[0028] 100. Chassis; 10. Enclosure; 11. Assembly hole; 13. Edge; 30. Cover; 31. Stud; 50. Fastener; 51. First fastening section; 53. Second fastening section; 55. Shearing section; 70. Connector; 71. First connecting section; 72. Second connecting section; 73. Buffer section; 731. Limiting hole; 733. Rib; 735. Corrugated structure; 90. Fixing screw. Detailed Implementation

[0029] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of several embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] It should be noted that if directional indications (such as up, down, left, right, front, back, etc.) are involved in multiple embodiments of this application, the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] Furthermore, if multiple embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0032] In related technologies, power conversion equipment such as inverters and rectifiers can be housed in chassis to protect power components and other parts, ensuring stable operation. However, when a power conversion device experiences thermal runaway or other faults, short circuits in some internal components can generate large amounts of gas. This gas accumulation inside the chassis causes a sudden increase in pressure, potentially leading to the chassis cover or structural components rupturing under significant pressure. This poses a safety hazard and reduces the practicality and structural reliability of the power conversion equipment. To address these issues, this application proposes a chassis 100.

[0033] Please see Figure 1 , Figure 2 and Figure 5 In one embodiment of this application, the chassis 100 includes a chassis body 10, a cover 30, a fastener 50, and a connector 70. The cover 30 is configured to open or close the chassis body 10. The fastener 50 is disposed between the chassis body 10 and the cover 30, with one end of the fastener 50 connected to the chassis body 10 and the other end of the fastener 50 connected to the cover 30. One end of the connector 70 is connected to the chassis body 10, and the other end of the connector 70 is connected to the cover 30. The connector 70 includes a buffer portion 73, which is configured to be movable or deformable so that the cover 30 moves relative to the chassis body 10 to form a pressure relief port.

[0034] In this application, the chassis 100 can be a power conversion device, which may include, but is not limited to, inverters, rectifier boxes, grid-connected boxes, etc. By using the chassis 100 to house the power components and other parts of the power conversion device, a certain degree of dustproof and waterproof effect can be achieved under the sealing effect of the chassis 100, so that the power conversion device can be stably installed in the outdoor environment and the stable operation of the power conversion device can be guaranteed.

[0035] The chassis 100 may include a housing 10 and a cover 30. The housing 10 may have a chamber for housing power components and other devices. The cover 30 closes the housing 10, forming a sealed box structure to provide protection for the chassis 100. The cover 30 may be separate from the housing 10, allowing the housing 10 to be opened and closed by removing and installing the cover 30, ensuring convenient disassembly and maintenance of the power conversion equipment. Alternatively, the cover 30 may be connected to the housing 10 using hinges or other hinges, allowing the housing 10 to be opened and closed by flipping the cover 30 over the housing 10. Or, the cover 30 may be connected to the housing 10 using a sliding rail and slider mechanism, allowing the housing 10 to be opened and closed by sliding the cover 30 over the housing 10. There are many ways to assemble and disassemble the housing 10 and the cover 30, and this application does not limit this method.

[0036] By installing a fastener 50 between the enclosure 10 and the cover 30, with one end of the fastener 50 connected to the enclosure 10 and the other end connected to the cover 30, the enclosure 10 and the cover 30 can be securely installed under the action of the fastener 50. This ensures that the cover 30 stably closes to the enclosure 10, guaranteeing a better airtight and protective effect for the chassis 100. Simultaneously, by connecting one end of a connector 70 to the enclosure 10 and the other end to the cover 30, the buffer portion 73 formed on the connector 70 can provide a certain degree of cushioning when the cover 30 moves relative to the enclosure 10 under force, achieving a more stable and reliable structural design for the chassis 100.

[0037] Understandably, the chassis 100 can have a first state where the fasteners 50 lock the chassis 10 and the cover 30, and a second state where the fasteners 50 break and the cover 30 moves relative to the chassis 10 to release pressure. When the power conversion equipment is operating stably, the chassis 100 can be in the first state, ensuring reliable protection for the internal components; however, when the components inside the chassis 100 experience thermal runaway or other malfunctions that generate a large amount of gas, the surge in gas pressure acting on the cover 30 can cause the fasteners 50 to separate under tension, thereby causing the cover 30 to move relative to the chassis 10 and placing the chassis in the second state.

[0038] Specifically, when a component in the power conversion equipment malfunctions and generates a large amount of gas, the gas pressure acting on the enclosure 10 and the cover 30 can easily cause the cover 30 to undergo plastic deformation. This causes the cover 30 to exert a certain force on the fastener 50, thereby causing the fastener 50 to disconnect the cover 30 from the enclosure 10. This allows the cover 30 to move a certain distance away from the enclosure 10 under the action of gas pressure, creating a gap of a certain width between the enclosure 10 and the cover 30. This facilitates the release of gas inside the enclosure 100, effectively depressurizing the enclosure 100 and preventing the cover 30 from flying off the enclosure 10 due to excessive pressure buildup. This effectively improves the explosion-proof performance of the enclosure 100. When the fastener 50 separates the housing 10 and the cover 30, creating a certain gap between the cover 30 and the housing 10, the cover 30 can move the connector 70. This allows the buffer portion 73 on the connector 70 to share some of the tension. The buffer portion 73, which can be a corrugated structure 735 or an elastic element (not shown), can be stretched. Alternatively, it can cause the upper part of the connector 70 to deform or break under stress. Thus, the movement of the buffer portion 73 can be used to make the connector 70 move the cover 30 to a certain extent. The buffering effect allows the connector 70 to maintain the connection between the cover 30 and the enclosure 10, preventing the cover 30 from detaching from the enclosure 10. This prevents the cover 30 from being subjected to a large instantaneous force and flying out rapidly away from the enclosure 10, thus avoiding injury to the user. It also prevents the components inside the enclosure 10 from being exposed after the cover 30 detaches from the enclosure 10, preventing the user from accidentally touching faulty components. This further reduces the safety hazards of the enclosure 100 and improves the practicality and structural reliability of the enclosure 100.

[0039] It should be noted that the connector 70 can be a block, plate, or sheet structure with a certain structural strength. A stretchable structure such as a spring or corrugated structure 735 can be provided on the connector 70 to form a buffer section 73; alternatively, the connector 70 can be made entirely of a stretchable structural material; or one or more fractureable structures can be provided on the connector 70 to form a buffer section 73, utilizing the breakage of the buffer section 73 under force to absorb and buffer the force applied to the lid 30. Of course, there are many structural forms of the connector 70 and many ways to form the buffer section 73 on the connector 70. This application does not limit these, as long as a stable connection between the connector 70 and the box body 10 and the lid 30 is achieved, and a buffering effect is provided when the lid 30 moves relative to the box body 10.

[0040] The chassis 100 can be connected to the chassis body 10 and the cover 30 using multiple fasteners 50 to ensure the overall structural stability of the chassis 100 in the first state. The fasteners 50 can be bolts, screws, or other structures with relatively low local structural strength. The fasteners 50 can be threadedly connected to the chassis body 10 and the cover 30 to achieve a tight connection between the chassis body 10 and the cover 30. When the cover 30 is subjected to air pressure, a certain shear force can be applied to the fasteners 50, causing the parts with lower structural strength on the fasteners 50 to break, thereby separating the cover 30 from the chassis body 10 and realizing the machine... The enclosure 100 provides stable assembly and pressure relief / explosion-proof functions; alternatively, the enclosure 100 can utilize multiple fasteners 50 and multiple fixing screws 90 to connect the enclosure body 10 and the enclosure cover 30, ensuring the overall structural stability of the enclosure 100 in the first state. In this case, the fasteners 50 can be bolts, screws, or other structures with lower structural strength than the fixing screws 90. The fixing screws 90 can be used to fasten the enclosure body 10 and the enclosure cover 30, and the fasteners 50 can be used to achieve a threaded connection between the enclosure body 10 and the enclosure cover 30. When the enclosure cover 30 is subjected to air pressure... This can cause the low-strength fastener 50 to break under stress, thereby separating the cover 30 and the enclosure 10 connected by the fastener to create a pressure relief port, achieving stable assembly and pressure relief explosion-proof function of the enclosure 100; alternatively, the fastener 50 can be a magnetic component such as a magnet, which can be used to magnetically connect the fastener 50 to the enclosure 10 and the cover 30 to achieve a tight connection, making the magnetic attraction force between the fastener 50 and the enclosure 10 and the cover 30 less than the air pressure force when the power conversion equipment fails, so that the cover 30 is subjected to air pressure. When in use, the magnetic connection between the fastener 50 and the housing 10 or the cover 30 can be pushed open to separate the cover 30 from the housing 10 and relieve pressure. Alternatively, the fastener 50 can be set with an electrically controlled connection structure. Electromagnetic or suspension mechanical structures can be used to keep the fastener 50 securely connected to the housing 10 and the cover 30 in the first state. In the event of a power conversion equipment failure, a control signal can be sent to adjust the fastener 50 to a second state, using mechanical action to separate the fastener 50 from the housing 10 and the cover 30, thus achieving stable assembly and pressure relief / explosion-proof functions of the chassis 100. There are many structural forms for the fastener 50, and this application does not limit this one, as long as the fastener 50 can securely connect the housing 10 and the cover 30 in the first state and separate them in the second state.

[0041] In one embodiment of this application, by setting fasteners 50 and connectors 70, the fasteners 50 connect the housing 10 and the cover 30, and the connectors 70 connect the housing 10 and the cover 30, thus achieving a stable assembly of the chassis 100 and ensuring the protective effect of the chassis 100 on the internally loaded components. When a component failure in the power conversion equipment causes a sudden increase in air pressure inside the chassis 100, the housing 10 and the cover 30 are easily subjected to air pressure and exert a force on the fasteners 50, causing the fasteners 50 to separate the housing 10 and the cover 30. At this time, the cover 30 can move away from the housing 10 under air pressure to form a pressure relief port, thereby allowing the gas generated inside the chassis 100 to be discharged and achieving pressure relief. Meanwhile, by providing a buffer part 73 to the connector 70, when the cover 30 is subjected to force and the connector 70 moves away from the enclosure 10, the movement or deformation of the buffer part 73 can achieve a certain buffering effect. This helps to maintain the connection between the connector 70 and the enclosure 10 and the cover 30, better restricts the cover 30 from detaching from the enclosure 10, avoids the cover 30 from being subjected to large instantaneous pressure and flying away from the enclosure 10, prevents the flying cover 30 from injuring the user, and also prevents the components inside the enclosure 10 from being exposed and accidentally touched by the user. This achieves better explosion-proof performance of the chassis 100 in the event of a power conversion equipment failure, and effectively improves the practicality and structural reliability of the chassis 100.

[0042] See Figure 5 and Figure 6 In one embodiment of this application, the fastener 50 includes a first fastening section 51, a second fastening section 53, and a shearing section 55. The first fastening section 51 is connected to the housing 10; the second fastening section 53 is connected to the housing cover 30; and the shearing section 55 connects the first fastening section 51 and the second fastening section 53. The structural strength of the shearing section 55 is less than the structural strength of the first fastening section 51 and the second fastening section 53.

[0043] In this embodiment, the fastener 50 can be configured using a connecting structure such as a connecting rod or a screw. In this case, the fastener 50 may include a first fastening section 51, a second fastening section 53, and a shearing section 55. The first fastening section 51 can be fastened to the housing 10 by means of threaded engagement; or it can be connected to the housing 10 by means of snap-fit ​​engagement; or the second fastening section 53 can be used to fasten the housing cover 30, so that the first fastening section 51 abuts against the side of the housing 10 opposite to the housing cover 30 to achieve a stable connection and installation of the fastener 50. There are many ways to connect the first fastening section 51 to the housing 10, and this application does not limit this one. Similarly, the second fastening section 53 can be fastened to the cover 30 by means of threaded connection; or it can be connected to the cover 30 by means of snap-fit ​​connection; or it can utilize the fastening effect of the first fastening section 51 and the box body 10 to make the second fastening section 53 abut against the side of the cover 30 facing away from the box body 10 to achieve a stable connection and installation of the fastener 50; there are many ways to connect the second fastening section 53 to the cover 30, and this application does not limit this.

[0044] By using a shearing section 55 to connect the first fastening section 51 and the second fastening section 53, and setting the structural strength of the shearing section 55 to be less than that of the first fastening section 51 and the second fastening section 53, the outer diameter of the shearing section 55 can be smaller than that of the first fastening section 51 and the second fastening section 53; alternatively, the first fastening section 51 and the second fastening section 53 can be made of a higher-strength material, while the shearing section 55 can be made of a lower-strength material. Furthermore, when the power conversion equipment malfunctions, the shearing force exerted on the fastener 50 by the air pressure on the cover 30 can cause the shearing section 55 to break, thereby disconnecting the fastener 50 from the cover 30 and the housing 10. This allows a certain gap to be formed between the cover 30 and the housing 10, creating a pressure relief port. This ensures stable airflow and pressure relief in the case of a malfunction, further improving the practicality and structural reliability of the housing 100.

[0045] See Figure 3 and Figure 5 In one embodiment of this application, the side of the housing 10 facing away from the cover 30 is provided with an assembly hole 11, and the side of the cover 30 facing the housing 10 is provided with a stud 31, which is disposed opposite to the assembly hole 11. A first fastening section 51 passes through the assembly hole 11, and a second fastening section 53 is inserted into the stud 31 and threadedly connected to the stud 31.

[0046] In this embodiment, the chassis 100 can have an assembly hole 11 on the side of the chassis 10 opposite to the cover 30, and the cover 30 can have a stud 31 opposite to the assembly hole 11. This allows the fastener 50 to pass through the assembly hole 11 from the side of the chassis 10 opposite to the cover 30, so that the second fastening section 53 is threadedly connected to the stud 31. At this time, the first fastening section 51 can pass through the assembly hole 11, and the nut of the first fastening section 51 can abut against the surface of the chassis 10 opposite to the cover 30. Alternatively, the first fastening section 51 can pass through the connector 70 and the chassis 10 in sequence, and the nut of the first fastening section 51 can abut against the connector 70. This allows the chassis 100 to be assembled by operating the fastener 50 from the side of the chassis 10 opposite to the cover 30, which helps to improve the assembly convenience and practicality of the chassis 100.

[0047] In one embodiment of this application, the fastener 50 is a magnetic component. The fastener 50 is connected to the housing 10 and magnetically engaged with the housing cover 30; or, the fastener 50 is connected to the housing cover 30 and magnetically engaged with the housing 10.

[0048] In this embodiment, the fastener 50 can be made of magnetic components such as magnets, and the fastener 50 can be magnetically connected to the housing 10 and the cover 30, which further improves the ease of disassembly and assembly of the housing 100.

[0049] In some embodiments, the fastener 50 can be installed and fixed to the housing 10 using fastening structures such as screws and clips, or it can be fixed to the housing 10 using adhesive. Then, the housing cover 30 is made of a magnetic material, or a magnetic component is provided at the position of the housing cover 30 corresponding to the position of the fastener 50, or a magnetic component with the opposite magnetic properties to the fastener 50 is provided at the position of the housing cover 30 corresponding to the position of the fastener 50. This allows the housing cover 30 to be magnetically attached to the housing 10 when it is closed, so that the fastener 50 can be magnetically attached to the housing 10 and the housing cover 30 to achieve a stable connection, further improving the structural stability and reliability of the housing 100.

[0050] In other embodiments, the fastener 50 can be installed and fixed to the cover 30 using screws, clips, or other fastening structures, or it can be fixed to the cover 30 using adhesive. Then, the entire enclosure 10 is made of a magnetic material, or a magnetic component is provided at the position of the enclosure 10 corresponding to the position where it is connected with the fastener 50, or a magnetic component with the opposite magnetic properties to the fastener 50 is provided at the position of the enclosure 10 corresponding to the position where it is connected with the fastener 50. This allows the fastener 50 to be magnetically connected to the enclosure 10 and the cover 30 when the cover 30 is closed, thereby achieving a stable connection between the fastener 50 and the enclosure 10 and the cover 30, further improving the structural stability and reliability of the enclosure 100.

[0051] The fastener 50, equipped with a magnetic component, can better release the magnetic connection between the fastener 50 and the enclosure 10 or the cover 30 when the power conversion equipment malfunctions, allowing a stable gap to be opened between the enclosure 10 and the cover 30 for venting and depressurization. Furthermore, after a certain amount of gas is released from the enclosure 100, the pressure force acting on the cover 30 is lower. At this point, the magnetic force of the fastener 50 allows the cover 30 to close the enclosure 10 again, better preventing users from accidentally touching the components inside the enclosure 100, achieving better safety protection for the enclosure 100, and further improving the practicality and structural reliability of the enclosure 100.

[0052] See Figures 1 to 3 In one embodiment of this application, the box body 10 is provided with a perimeter 13, which is disposed opposite to the box cover 30. Fasteners 50 connect the perimeter 13 and the box cover 30. The connector 70 includes a first connecting segment 71 and a second connecting segment 72. The first connecting segment 71 is connected to the box cover 30, and the extension direction of the second connecting segment 72 is set at an angle to the extension direction of the first connecting segment 71. The second connecting segment 72 is connected to the perimeter 13.

[0053] In this embodiment, the chassis 100 can be designed with a perimeter edge 13, so that the chassis 10 can be fitted and assembled with the cover 30 using the perimeter edge 13. This helps to increase the contact area between the chassis 10 and the cover 30, and better improve the connection stability and reliability of the chassis 10 and the cover 30.

[0054] At this time, fastener 50 can be connected at one end to the cover 30 and at the other end to the edge 13 of the body 10, making it easier to assemble and disassemble the fastener 50 from the cover 30 and the body 10. Since the extension direction of the second connecting section 72 is set at an angle to the extension direction of the first connecting section 71, such as... Figure 5 As shown, the extension direction of the second connecting section 72 can be the width direction of the perimeter 13, and the extension direction of the first connecting section 71 can be the width direction of the side wall of the cover 30. The first connecting section 71 is connected to the side wall of the cover 30, and the second connecting section 72 is connected to the perimeter 13 of the enclosure 10. At this time, the second connecting section 72 can be bent to connect the first connecting section 71, or the two ends of the elastic structure forming the buffer part 73 can be used to connect the first connecting section 71 and the second connecting section 72 respectively, so that the connector 70 can adopt a plate structure design similar to the "7" shape, realizing a stable connection between the connector 70 and the enclosure 10 and the cover 30. Furthermore, the perimeter 13 is used for the installation of fasteners 50 and connectors 70, which makes it easier for the chassis 100 to operate the fasteners 50 and connectors 70 to assemble the cover 30 and the enclosure 10, further improving the structural reliability and ease of assembly and disassembly of the chassis 100.

[0055] In one configuration, when the connector 70 utilizes the structure of the second connecting section 72 bent to connect the first connecting section 71, the connector 70 can have a buffer portion 73 positioned on the first connecting section 71. This allows the buffer portion 73 to be more directly subjected to force and move or deform to cushion the lid 30 when the lid 30 moves away from the box body 10. Alternatively, the connector 70 can have the buffer portion 73 positioned on the second connecting section 72, allowing the buffer portion 73 to occupy a larger structural dimension of the connector, ensuring sufficient cushioning effect for the movement of the lid 30. When the connector 70 connects the first connecting segment 71 and the second connecting segment 72 using the buffer 73, the buffer 70 can be configured with a 7-shaped bend, so that the two ends of the buffer 73 at the included angle connect to the first connecting segment 71 and the second connecting segment 72 respectively; or, the extension direction of the buffer 73 can be the same as the extension direction of the first connecting segment 71, and the end of the second connecting segment 72 away from the edge 13 can be bent to connect to the buffer 73; or, the extension direction of the buffer 73 can be the same as the extension direction of the second connecting segment 72, and the end of the first connecting segment 71 away from the cover 30 can be bent to connect to the buffer 73. Of course, there are many other ways to configure the buffer 73 on the connector 70, and this application does not limit this.

[0056] Furthermore, the chassis 100 can be configured such that the connection positions of the second connecting section 72 and the housing 10 overlap with those of the fastener 50 and the housing 10. This allows the fastener 50 to securely mount the second connecting section 72 onto the housing 10, enabling better synchronous assembly of the fastener 50 with the connector 70 and improving the assembly convenience of the chassis 100. In this case, when a buffer section 73 is provided on the second connecting section 72, the buffer section 73 can be positioned between the fastener 50 and the first connecting section 71, ensuring a stable buffering effect against force-induced movement of the housing cover 30.

[0057] And refer to Figure 8 In one embodiment of this application, the cover 30 can be closed on the side wall of the housing 10 to achieve overall sealing of the housing 100. The side wall of the cover 30 can be flush with the side wall of the housing 10 or form a stepped structure. At this time, one end of the connector 70 can be connected to the side wall of the cover 30, and the other end of the connector 70 can be connected to the side wall of the housing 10, so that the connector 70 adopts a structure design similar to a straight bar, ensuring the fast assembly of the connector 70 with the housing 10 and the cover 30.

[0058] At this time, the side wall of the cover 30 can be provided with a first hanging ear (not shown), and the side wall of the enclosure 10 can be provided with a second hanging ear (not shown). One end of the fastener 50 is connected to the first hanging ear, and the other end of the fastener 50 is connected to the second hanging ear, so as to realize the fastening assembly of the fastener 50 with the enclosure 10 and the cover 30, and further improve the structural stability and reliability of the enclosure 100.

[0059] See Figure 2 , Figure 5 and Figure 7 In one embodiment of this application, the connector is provided with a limiting hole 731, and the connector includes at least one rib 733, which is disposed within the limiting hole 731. The rib 733 extends along a first direction, which is at an angle to the length direction of the connector 70; the limiting hole 731 and the at least one rib 733 form a buffer portion 73.

[0060] In this embodiment, a limiting hole 731 extending along the length direction of the connector can be provided on the connector. By providing a rib 733 in the limiting hole 731, the rib 733 can extend along the first direction. For ease of understanding, this embodiment can be described as follows: Figure 2 The coordinate system shown in the diagram indicates the direction as a reference. The length direction of the connector 70 can be the X-axis direction, and the first direction can be the Y-axis direction, which forms an angle with the length direction of the connector 70. Preferably, the first direction can be perpendicular to the length direction of the connector 70. The two ends of the rib 733 are respectively connected to the two opposite inner walls of the limiting hole 731. The number of ribs 733 can be one, two, three, four, etc. When there are two or more ribs 733, multiple ribs 733 can be arranged at intervals along the extension direction of the buffer part 73. By providing at least one rib 733 in the limiting hole 731, the limiting hole 731 and at least one rib 733 can form a buffer part 73 on the connector 70. The buffering effect of the box cover 30 moving under force is achieved by the force-induced fracture of at least one rib 733.

[0061] At this time, as Figure 8 As shown, the chassis 100 can have a protruding structure on the side of the chassis 10 facing away from the cover 30. When the connector 70 is installed on the chassis 100, the protruding structure is inserted into the limiting hole 731, so that the protruding structure abuts against the rib 733 in the limiting hole 731. In this way, when the power conversion equipment malfunctions and generates a large instantaneous air pressure on the cover 30, the cover 30 moves the connector 70 away from the chassis 10, which can cause the protruding structure to break against the rib 733. The breaking of the rib 733 plays a certain role in buffering and unloading the force, avoiding the overall breakage of the connector 70, ensuring that the connector 70 has a better limiting effect on the cover 30, and further improving the structural stability and reliability of the chassis 100.

[0062] Or, refer to Figure 2 and Figure 5 In one embodiment of this application, the fastener 50 is disposed through the side of the housing 10 opposite to the housing cover 30, the fastener 50 passes through the limiting hole 731 and abuts against the rib 733.

[0063] The fastener 50's connection position on the housing 10 can overlap with the limiting hole 731 of the connector 70, allowing the fastener 50 to pass through the limiting hole 731 and connect to the housing 10, and causing the fastener 50 to abut against the rib 733 within the limiting hole 731. In this way, when a power conversion device malfunction causes a large instantaneous air pressure on the housing cover 30, the housing cover can move the connector 70 away from the housing 10, causing the fastener 50 to break against the rib 733. The breakage of the rib 733 provides a certain buffering and stress-relieving effect, preventing the connector 70 from breaking completely, ensuring better limiting of the housing cover 30 by the connector 70, and further improving the structural stability and reliability of the housing 100.

[0064] In one embodiment of this application, the connector 70 includes a first connecting segment 71, a second connecting segment 72, and an elastic member. The elastic member forms a buffer portion 73. The first connecting segment 71 is connected to the lid 30, the second connecting segment 72 is connected to the housing 10, one end of the elastic member is connected to the end of the first connecting segment 71 away from the lid 30, and the other end of the elastic member is connected to the end of the second connecting segment 72 away from the housing 10.

[0065] In this embodiment, the connector 70 may include a first connecting segment 71, a second connecting segment 72, and an elastic element. The elastic element can be used to form a buffer portion 73. The elastic element may include, but is not limited to, a spring, a tension spring, a leaf spring, a corrugated structure 731, etc. By connecting the first connecting segment 71 to the cover 30 and the second connecting segment 72 to the housing 10, a stable assembly of the connector 70 with the housing 10 and the cover 30 is achieved. One end of the elastic element is connected to the end of the first connecting segment 71 away from the cover 30, and the other end of the elastic element is connected to the end of the second connecting segment 72 away from the housing 10. The elastic deformation of the buffer portion 73 can be used to buffer the cover 30 when it moves outward, better preventing the cover 30 from flying out of the housing 10 under the action of a sudden increase in air pressure, achieving better explosion-proof performance of the chassis 100, and further improving the practicality and structural reliability of the chassis 100. It should be noted that the first connecting section 71 and the second connecting section 72 can be made of rigid materials and can be connected to the elastic element using fastening structures such as bolts and clips to form the connecting member 70. Alternatively, the elastic element can be integrally cast with the first connecting section 71 and the second connecting section 72. Furthermore, when the installation positions of the fastener 50 and the housing 10 overlap with the installation positions of the second connecting section 72 and the housing 10, the fastener 50 can pass through the second connecting section 72, thus fixing the connecting member 70 to the housing 10, achieving synchronous installation of the fastener 50 and the connecting member 70.

[0066] Furthermore, by providing an elastic element to form a buffer 73 on the connector 70, after the chassis 100 releases a certain amount of gas to relieve pressure, the buffer 73 can restore its elastic deformation and drive the cover 30 to move toward the chassis 10, so that the cover 30 closes the chassis 10 again. This better prevents the components inside the chassis 10 from being exposed, avoids users accidentally touching the components inside the chassis 10, achieves better safety protection for the chassis 100, and further improves the structural stability and reliability of the chassis 100.

[0067] In one embodiment of this application, the elastic element is a corrugated structure 735.

[0068] In this embodiment, the elastic element can be set in the form of a corrugated structure 735. The corrugated structure 735 can have multiple bending structures arranged in sequence. When subjected to a certain tensile force, the multiple bending structures can be stretched and deformed. The stress and tension of the corrugated structure 735 can be used to achieve a buffering effect when the cover 30 moves outward, better preventing the cover 30 from flying out of the housing 10 under the action of sudden increase in air pressure, achieving better explosion-proof performance of the housing 100, and further improving the practicality and structural reliability of the housing 100.

[0069] See Figure 1 and Figure 3In one embodiment of this application, the chassis 100 further includes fixing screws 90, which connect the chassis 10 and the cover 30. The fixing screws 90 and fasteners 50 are arranged side by side at intervals.

[0070] In this embodiment, the chassis 100 can be connected to the cover 30 on one side of the chassis 10 using fixing screws 90, and to the cover 30 on the other side of the chassis 10 using fasteners 50. The fixing screws 90 and fasteners 50 are arranged side by side on the chassis 10 at intervals. In the event of a power conversion equipment failure, the fasteners 50 can be used to separate the chassis 10 and the cover 30, allowing a certain gap to be opened between the chassis 10 and the cover 30. At the same time, the fixing screws 90 can be used to maintain a partial tight connection between the chassis 10 and the cover 30, effectively preventing the cover 30 from flying out of the chassis 10, achieving better explosion-proof performance of the chassis 100, and further improving the structural stability and reliability of the chassis 100.

[0071] The chassis 100 can be configured with the connector 70 and the fastener 50 in cooperation; or, the connector 70 can be configured with the fixing screw 90 and the fastener 50 respectively, so that the cover 30 can be better prevented from flying out of the chassis 100 due to the sudden increase in air pressure under the cooperation of the connector 70, thereby achieving better explosion-proof performance of the chassis 100.

[0072] This application also proposes a power conversion device, which includes a power component and a chassis 100. The specific structure of the chassis 100 is as described in the above embodiments. Since this power conversion device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0073] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A chassis (100), characterized in that, include: Box (10); A lid (30) is provided that can be opened or closed to cover the box body (10); Fastener (50), one end of which is connected to the housing (10) and the other end of which is connected to the housing cover (30); A connector (70) is provided, one end of which is connected to the housing (10) and the other end of which is connected to the housing cover (30). The connector (70) includes a buffer (73) which is configured to move or deform so that the housing cover (30) moves relative to the housing (10) to form a pressure relief port.

2. The chassis (100) as described in claim 1, characterized in that, The fastener (50) includes: The first fastening section (51) is connected to the housing (10); The second fastening section (53) is connected to the box cover (30); A shearing segment (55) connects the first fastening segment (51) and the second fastening segment (53), and the structural strength of the shearing segment (55) is less than the structural strength of the first fastening segment (51) and the second fastening segment (53).

3. The chassis (100) as described in claim 2, characterized in that, The box body (10) is provided with an assembly hole (11), and the box cover (30) is provided with a stud (31) on the side facing the box body (10), and the stud (31) is arranged opposite to the assembly hole (11); The first fastening section (51) passes through the assembly hole (11), and the second fastening section (53) is inserted into the stud (31) and threadedly connected to the stud (31).

4. The chassis (100) as described in claim 1, characterized in that, The fastener (50) is a magnetic component; The fastener (50) is connected to the housing (10) and magnetically connected to the housing cover (30); or, The fastener (50) is connected to the cover (30) and magnetically connected to the box body (10).

5. The chassis (100) as described in claim 1, characterized in that, The connector (70) is provided with a limiting hole (731). The connector (70) includes at least one rib (733). The at least one rib (733) is disposed in the limiting hole (731). The rib (733) extends along a first direction, which is a direction that forms an angle with the length direction of the connector (70). The limiting hole (731) and the at least one rib (733) form the buffer portion (73).

6. The chassis (100) as described in claim 5, characterized in that, The fastener (50) is provided through the side of the housing (10) facing away from the cover (30), the fastener (50) passes through the limiting hole (731) and abuts against the rib (733).

7. The chassis (100) as described in claim 1, characterized in that, The connector (70) includes a first connecting segment (71), a second connecting segment (72), and an elastic element. The elastic element forms the buffer portion (73). The first connecting segment (71) is connected to the lid (30), and the second connecting segment (72) is connected to the box body (10). One end of the elastic element is connected to the end of the first connecting segment (71) away from the lid (30), and the other end of the elastic element is connected to the end of the second connecting segment (72) away from the box body (10).

8. The chassis (100) as described in claim 7, characterized in that, The elastic element has a corrugated structure (735).

9. The chassis (100) as described in any one of claims 1 to 8, characterized in that, The box body (10) is provided with a rim (13), the rim (13) is disposed opposite to the box cover (30), and the fastener (50) connects the rim (13) and the box cover (30); The connector (70) includes a first connecting segment (71) and a second connecting segment (72). The first connecting segment (71) is connected to the box cover (30). The extension direction of the second connecting segment (72) is set at an angle to the extension direction of the first connecting segment (71). The second connecting segment (72) is connected to the edging (13).

10. The chassis (100) as described in any one of claims 1 to 8, characterized in that, The chassis (100) also includes fixing screws (90), which connect the chassis body (10) and the cover (30). The fixing screws (90) and the fasteners (50) are arranged side by side at intervals.

11. A power conversion device, characterized in that, The power conversion device includes a power component and a chassis (100), wherein the chassis (100) is any of the chassis (100) described in claims 1 to 10, and the power component is disposed within the chassis (100).

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