Shell for power equipment and photovoltaic inverter

Abstract

The utility model provides a shell for power equipment and a photovoltaic inverter, which are used for electronic equipment. The shell comprises a bottom plate, a cover body, two first side plates and two second side plates, the bottom shell and the cover body are oppositely arranged in the first direction, the two first side plates are oppositely arranged in the second direction, the two second side plates are oppositely arranged in the third direction, and every two of the first direction, the second direction and the third direction are perpendicular to each other. The cover body is connected with at least one of the two first side plates in a first fixing mode, the cover body is connected with at least one of the two second side plates in a second fixing mode, and the fastening force of the first fixing mode is different from that of the second fixing mode. The photovoltaic inverter provided by the utility model comprises an electrical assembly and the shell for the electrical equipment, the shell is used for accommodating the electrical assembly, and the electrical assembly comprises a plurality of power tubes. According to the shell of the power equipment and the photovoltaic inverter, the problem that a cover body of an existing photovoltaic inverter is easy to fly off when the pressure in the shell is increased to a certain degree is solved.

Description

[0001] This application is a divisional application. The application number of the original application is 202321424668.X, and the original application date is June 5, 2023. The entire content of the original application is incorporated herein by reference. Technical Field

[0002] This application relates to the technical field of power equipment, and particularly to a housing for power equipment and a photovoltaic inverter. Background Art

[0003] A photovoltaic inverter is one of the core components of a photovoltaic power generation system. Specifically, the photovoltaic inverter includes electrical components and a housing. Among them, the housing includes a box body and a cover body. The box body and the cover body cooperate to enclose a hermetically sealed accommodation space, and the electrical components are arranged in this hermetically sealed accommodation space, so that the photovoltaic inverter meets the requirements of waterproofing, dustproofing, etc. However, there are usually many electrolytic capacitor components inside a photovoltaic inverter. In case of an abnormality, a large amount of combustible gas is generated when the electrolyte vaporizes. It is flammable and explosive. The disadvantage of the existing structure is that when an explosion occurs in case of an abnormality, the pressure in the housing increases suddenly, and the strong pressure will cause the cover body to fly off the box body, which is likely to injure the surrounding personnel and equipment. Summary of the Utility Model

[0004] This application provides a housing for power equipment and a photovoltaic inverter, which can improve the problem that the cover body is likely to fly off when the pressure in the housing of the existing photovoltaic inverter increases suddenly.

[0005] In a first aspect, this application provides a housing for power equipment. The housing includes a bottom plate, a cover body, two first side plates, and two second side plates. The bottom shell and the cover body are arranged opposite to each other along a first direction, the two first side plates are arranged opposite to each other along a second direction, and the two second side plates are arranged opposite to each other along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other in pairs, where:

[0006] The cover body is connected to at least one of the two first side plates by a first fixing method, and the cover body is connected to at least one of the two second side plates by a second fixing method. The fastening force of the first fixing method is different from the fastening force of the second fixing method.

[0007] In this solution, when the cover body is subjected to a large pressure, it can deform and absorb a certain amount of energy. At the same time, after the cover body is lifted a certain distance, the inside of the housing is communicated with the external environment, so as to play a pressure relief role, so that when the pressure in the housing is large, the accumulated energy can be absorbed and released, thereby reducing the possibility of the cover body flying off.

[0008] In an alternative technical solution, the length of the two first side plates in the third direction is less than the length of the two second side plates in the second direction.

[0009] In an alternative technical solution, the fastening force of the first fixing method is less than the fastening force of the second fixing method, so that the cover can be reliably connected to the second side plate and can form a gap with the first side plate when the pressure in the housing reaches a certain level, thereby absorbing energy and relieving pressure.

[0010] In an alternative technical solution, the fastening force of the first fixing method is greater than the fastening force of the second fixing method.

[0011] In an alternative technical solution, the bottom plate, the two first side plates and the two second side plates enclose to form a receiving cavity for receiving electrical components, where:

[0012] Each of the first side plates is connected to the two second side plates by a third fixing method, and the bottom plate is connected to the two first side plates and the two second side plates by the third fixing method. At least one of the fastening forces of the first fixing method or the second fixing method is less than the fastening force of the third fixing method. Thus, when the pressure in the housing reaches a certain level, the cover deforms with the receiving cavity intact and forms a gap with the corresponding first side plate or second side plate, playing a role in absorbing energy and relieving pressure.

[0013] In an alternative technical solution, the third fixing method includes welding or integral molding. The two pairs of side plates are fixedly connected in sequence and each side plate is fixedly connected to the bottom plate, so that the connection reliability between adjacent side plates and between each side plate and the bottom plate is stronger.

[0014] In an alternative technical solution, the first fixing method includes a plurality of first fixing units. Each first fixing unit includes a first screw, a first nut and a first gasket, and the first nut is used for threadedly connecting the first screw;

[0015] The second fixing method includes a plurality of second fixing units. Each second fixing unit includes a second screw, a second nut, a reinforcing piece and a second gasket, and the second nut is used for threadedly connecting the second screw.

[0016] In an alternative technical solution, at least one of the two first side plates includes a first flanging structure. The first flanging structures are arranged outside the housing, and the projection of the cover in the first direction covers the projection of the first flanging structure. The first flanging structure includes a plurality of first through holes, and the plurality of first through holes are arranged at intervals in the first flanging structure in the third direction, where:

[0017] Each of the first through-holes penetrates the first flanging structure along the first direction. Each of the first through-holes is used to accommodate the first screw of one of the first fixing units. The first nut and the first gasket of one of the first fixing units are respectively sleeved on the first screw. Along the first direction, the first gasket, the cover body, the first flanging structure, and the first nut are stacked in sequence.

[0018] In an alternative technical solution, at least one of the two second side plates includes a second flanging structure. The second flanging structure is arranged on the outer side of the housing. Along the first direction, the projection of the cover body covers the projection of the second flanging structure. The second flanging structure includes a plurality of second through-holes, and the plurality of second through-holes are arranged at intervals in sequence along the second direction, where:

[0019] Each of the second through-holes penetrates the second flanging structure along the first direction. Each of the second through-holes is used to accommodate the second screw of one of the second fixing units. The second nut, the second gasket, and the reinforcing piece of one of the second fixing units are respectively sleeved on the first screw. Along the first direction, the second gasket, the cover body, the second flanging structure, the reinforcing piece, and the second nut are stacked in sequence. The setting of the reinforcing piece can reduce the local stress near the second through-hole, reduce the tendency of the second nut to displace in the direction away from the bottom plate, and ensure the reliable connection between the cover body and the second flanging structure.

[0020] In an alternative technical solution, the cover body includes at least one third flanging structure. Along the first direction, the projection of each of the third flanging structures covers the first flanging structure or the second flanging structure.

[0021] In an alternative technical solution, each of the third flanging structures includes a plurality of fourth through-holes, where:

[0022] Along the first direction, each of the fourth through-holes penetrates one of the third flanging structures, and the projection of each of the fourth through-holes overlaps with the projection of one of the first through-holes or the projection of one of the second through-holes.

[0023] In an alternative technical solution, the housing includes a sealing ring. The sealing ring is arranged at the joints of the cover body with the two first side plates and the two second side plates to achieve the sealing between the cover body and the first side plates and the second side plates, so as to achieve the effects of waterproofing and dustproofing.

[0024] In an alternative technical solution, a conductive layer is provided on the inner surface of the sealing ring. The cover body is electrically connected to the two first side plates and the two second side plates through the conductive layer, so that the EMC shielding effect between the cover body and the first side plates and the second side plates is better.

[0025] In a second aspect, the present application provides a photovoltaic inverter, which includes electrical components and the housing for any one of the power devices as described above. The housing is used to accommodate the electrical components, and the electrical components include a plurality of power tubes. This photovoltaic inverter can reduce the possibility of the cover flying off. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a photovoltaic inverter provided by an embodiment of the present application;

[0027] Figure 2 A three-dimensional structural schematic diagram of a housing for a power device provided by an embodiment of the present application;

[0028] Figure 3 A structural schematic diagram of the housing for a power device provided by an embodiment of the present application when the cover is lifted by a certain distance, wherein the cover is connected to one first side plate by a first fixing method;

[0029] Figure 4 A structural schematic diagram of the housing for a power device provided by another embodiment of the present application when the cover is lifted by a certain distance, wherein the cover is connected to two first side plates by the first fixing method;

[0030] Figure 5 A structural schematic diagram of the housing for a power device provided by an embodiment of the present application when the cover is lifted by a certain distance, wherein the cover is connected to one second side plate by a second fixing method;

[0031] Figure 6 A structural schematic diagram of the housing for a power device provided by another embodiment of the present application when the cover is lifted by a certain distance, wherein the cover is connected to two second side plates by the second fixing method;

[0032] Figure 7 A structural schematic diagram of the housing for a power device provided by an embodiment of the present application;

[0033] Figure 8 is Figure 7 a sectional view taken along line B-B of the housing shown;

[0034] Figure 9 is Figure 7 a sectional view taken along line C-C of the housing shown;

[0035] Figure 10 A structural schematic diagram of a reinforcing piece and a second nut in a housing provided by an embodiment of the present application;

[0036] Figure 11Schematic diagram of a sealing ring in a housing provided by an embodiment of the present application;

[0037] Figure 12 Cross-sectional view of a sealing ring in a housing provided by an embodiment of the present application.

[0038] Reference numerals: 1 - bottom plate; 2 - cover body; 21 - third flanging structure; 211 - fourth through hole; 3 - first side plate; 31 - first flanging structure; 4 - second side plate; 41 - second flanging structure; 411 - second through hole; 5 - first fixing unit; 51 - first screw; 52 - first nut; 53 - first gasket; 54 - first elastic washer; 6 - second fixing unit; 61 - second screw; 62 - second nut; 63 - reinforcing plate; 64 - second gasket; 65 - second elastic washer; 7 - sealing ring; 8 - conductive layer; 9 - electrical component; 100 - housing. Detailed implementation manners

[0039] The photovoltaic inverter is one of the core components of a photovoltaic power generation system and plays an important role in the photovoltaic power generation system. As is well known, good airtightness is a basic requirement for the inverter housing. And precisely because the housing has good airtightness, the pressure accumulated in the inner cavity of the housing has nowhere to be released. When the pressure reaches a certain level due to various factors, the cover body will fly off the box under the action of the strong pressure, which poses a significant threat to the personnel and equipment around the photovoltaic inverter.

[0040] Based on this, an embodiment of the present application provides a housing for a power device and a photovoltaic inverter to solve the above problems. To make the purpose, technical solution, and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings.

[0041] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and appended claims of the present application, the singular forms "a", "an", "the", "above", "said", "this", and "one" are also intended to include, for example, the expression "one or more", unless there is a clear indication to the contrary in the context.

[0042] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized.

[0043] Figure 1 Schematic diagram of a photovoltaic inverter provided for an embodiment of the present application, as Figure 1 shown, the photovoltaic inverter includes an electrical component 9 and a housing 100 for a power device. Among them, the housing 100 has a receiving cavity, the electrical component 9 includes a plurality of power tubes, and the electrical component 9 is arranged in the receiving cavity of the housing 100, so as to protect the electrical component 9 through the housing 100. Figure 2 Schematic perspective view of a housing for a power device provided for an embodiment of the present application, as Figure 2 shown, the housing 100 includes a bottom plate 1, a cover 2, two first side plates 3 and two second side plates 4. Specifically, the bottom plate 1 and the cover 2 are arranged opposite to each other along a first direction D1, the two first side plates 3 are arranged opposite to each other along a second direction D2, and the two second side plates 4 are arranged opposite to each other along a third direction D3, wherein the first direction D1, the second direction D2 and the third direction D3 are perpendicular to each other in pairs. Further, the cover 2 is fixedly connected to each of the first side plates 3 and each of the second side plates 4. For example, the cover 2 is connected to one of the two first side plates 3 by a first fixing method, or the cover 2 is connected to both of the two first side plates 3 by the first fixing method. The cover 2 is connected to one of the two second side plates 4 by a second fixing method, or the cover 2 is connected to both of the two second side plates 4 by the second fixing method. It should be noted that the fastening force of the above first fixing method is different from the fastening force of the above second fixing method. That is to say, the fastening force of the first fixing method is less than or greater than the fastening force of the second fixing method. That is, the fastening force between the first side plate 3 connected to the cover 2 by the first fixing method and the cover 2 is less than or greater than the fastening force between the second side plate 4 connected to the cover 2 by the second fixing method and the cover 2.

[0044] For ease of description, in some of the following embodiments, the first side plate 3 connected to the cover body 2 by the first fixing method is named the first side plate A, and the second side plate 4 connected to the cover body 2 by the second fixing method is named the second side plate A. In the above solution, the fastening force between the cover body 2 and the first side plate A is different from the fastening force between the cover body 2 and the second side plate A. When the cover body 2 is subjected to a large pressure, for example, when the pressure in the housing suddenly surges, the cover body 2 at the place with a relatively large fastening force can maintain a reliable connection with the corresponding first side plate A or second side plate A. At the place where the fastening force is relatively small, the cover body 2 can deform and be lifted a certain distance, so as to form a gap between the cover body 2 and the corresponding second side plate A or first side plate A, enabling the interior of the housing 100 to communicate with the external environment. When the cover body 2 is lifted a certain distance, on the one hand, the deformation of the cover body 2 can absorb a certain amount of energy, and on the other hand, after the cover body 2 is lifted a certain distance, the interior of the housing 100 communicates with the external environment, thereby playing a role in pressure relief, so that when the pressure in the housing 100 is relatively large, the accumulated energy can be absorbed and released, thereby reducing the possibility of the cover body 2 flying off.

[0045] When specifically setting the above-mentioned first side plates 3 and second side plates 4, in an optional implementation manner, the length of each first side plate 3 in the above-mentioned third direction D3 is less than the length of each second side plate 4 in the above-mentioned second direction D2. Of course, in another implementation manner, the length of each first side plate 3 in the above-mentioned third direction D3 may also be greater than or equal to the length of each second side plate 4 in the above-mentioned second direction D2.

[0046] Taking the length of each first side plate 3 in the above-mentioned third direction D3 being less than the length of each second side plate 4 in the above-mentioned second direction D2 as an example, in a specific implementation manner, the fastening force between the cover body 2 and the first side plate A is less than the fastening force between the cover body 2 and the second side plate A. That is to say, the fastening force of the first fixing method is less than the fastening force of the second fixing method. In this solution, the length of the second side plate A is longer, and the fastening force between the cover body 2 and the second side plate A is greater than the fastening force between the cover body 2 and the first side plate A. In this way, while absorbing energy through the deformation of the cover body 2 and relieving pressure through the gap between the cover body 2 and the first side plate A, the connection reliability between the cover plate and the second side plate A is also stronger, which is beneficial to further reducing the possibility of the cover body 2 flying off. The following will be specifically described with reference to specific embodiments. Figure 3 The following is a schematic structural diagram of a housing for a power device according to an embodiment of the present application when the cover body is lifted a certain distance. It should be noted that in this embodiment, the cover body 2 is connected to a first side plate 3 by the first fixing method. As Figure 3 shown, the corresponding part of the cover body 2 and the first side plate 3 deforms, and a gap a is formed between the cover body 2 and the first side plate 3. Figure 4Schematic diagram of the structure of the housing for electrical equipment provided by another embodiment of the present application when the cover is lifted by a certain distance. It should be noted that in this embodiment, the cover 2 is connected to the two first side plates 3 by the first fixing method. As Figure 4 shown, the corresponding parts of the cover 2 and each first side plate 3 are deformed, and a gap b is formed between the cover 2 and each first side plate 3. In this solution, both ends of the cover 2 can be deformed, and gaps are formed between both ends of the cover 2 and the corresponding first side plates 3 respectively, with better energy absorption and pressure relief effects, and the possibility of the cover 2 flying off is greatly reduced.

[0047] Still taking the length of each first side plate 3 along the above-mentioned third direction D3 being less than the length of each second side plate 4 along the above-mentioned second direction D2 as an example, in another specific implementation manner, the fastening force of the first fixing method is greater than the fastening force of the second fixing method. The following will be specifically described with reference to specific embodiments. Figure 5 Schematic diagram of the structure of the housing for electrical equipment provided by an embodiment of the present application when the cover is lifted by a certain distance. It should be noted that in this embodiment, the cover 2 is connected to a second side plate 4 by the second fixing method. As Figure 5 shown, the corresponding part of the cover 2 and the second side plate A is deformed, and a gap c is formed between the cover 2 and the second side plate A. Figure 6 Schematic diagram of the structure of the housing for electrical equipment provided by another embodiment of the present application when the cover is lifted by a certain distance. It should be noted that in this embodiment, the cover 2 is connected to the two second side plates 4 by the second fixing method. As Figure 6 shown, the corresponding parts of the cover 2 and each second side plate 4 are deformed, and a gap d is formed between the cover 2 and each second side plate 4. In this solution, both ends of the cover 2 can be deformed, and gaps are formed between both ends of the cover 2 and the corresponding second side plates 4 respectively, with better energy absorption and pressure relief effects, and the possibility of the cover 2 flying off is smaller.

[0048] In an alternative implementation, the bottom plate 1, the two first side plates 3, and the two second side plates 4 enclose a receiving cavity for receiving the electrical component 9, that is, the housing 100 is in the shape of a cuboid or a cube. Specifically, each first side plate 3 is connected to the two second side plates 4 by a third fixing method, and the bottom plate 1 is connected to the two first side plates 3 and the two second side plates 4 by a third fixing method, thereby enclosing the receiving cavity. Among them, at least one of the fastening forces of the first fixing method or the second fixing method is less than the fastening force of the third fixing method. In this way, when the pressure in the housing 100 is large enough, the cover body 2 deforms and forms a gap between it and the corresponding first side plate A or second side plate A while the receiving cavity remains intact, playing a role in energy absorption and pressure relief. Exemplarily, the third fixing method includes welding or integral molding, and the two pairs of side plates are sequentially fixedly connected and each side plate is fixedly connected to the bottom plate 1. For example, welding connections are used between adjacent side plates and between each side plate and the bottom plate, or the bottom plate 1, the two first side plates 3, and the two second plates are of an integral molding structure, for example, by 3D printing or deep drawing. Of course, the connection methods between adjacent side plates and between each side plate and the bottom plate are not limited to this. For example, the bottom plate 1, the two first side plates 3, or the two second plates are formed by bending a single sheet of material into a U-shaped structure, and the corresponding two second side plates 4 or first side plates 3 are welded to both ends of the U-shaped structure.

[0049] Of course, the housing 100 is not limited to the above-mentioned cuboid or cube shape. In other implementations, the housing 100 can also be a columnar structure with a cross-sectional shape of a pentagon or a hexagon, which will not be elaborated here.

[0050] Figure 7 Schematic structural diagram of a housing for an electrical device provided by an embodiment of the present application Figure 8 is Figure 7 a cross-sectional view taken along line B-B of the shown housing. Please refer to Figure 7 and Figure 8At least one of the two first side panels 3 includes a first flange structure 31. The first flange structure 31 is located outside the housing 100, and the projection of the cover 2 along the first direction D1 overlaps the projection of the first flange structure 31. Furthermore, the first flange structure 31 includes a plurality of first through-holes, which are sequentially arranged along the third direction D3. Each first through-hole penetrates the first flange structure 31 along the first direction D1. The first fixing method includes a plurality of first fixing units 5, each of which includes a first screw 51, a first nut 52, and a first washer 53. Each first through-hole corresponds to a first fixing unit 5. For example, a first through-hole and its corresponding first fixing unit 5 are configured to accommodate the first screw 51. The first nut 52 and the first washer 53 are respectively sleeved onto the first screw 51. The first washer 53, the cover 2, the first flange structure 31, and the first nut 52 are sequentially stacked along the first direction D1, and the first nut 52 is threadedly connected to the first screw 51. That is, the first nut 52 is fixed to the side of the first flange structure 31 facing away from the cover body 2, the first gasket 53 is located on the side of the cover body 2 facing away from the first flange structure 31, and the threaded portion of the first screw 51 passes through the first gasket 53, the cover body 2, and the first through hole in sequence, and is threadedly connected to the first nut 52. For example, the first nut 52 is fixed to the side of the first flange structure 31 facing away from the cover body 2 by pressure riveting. In this solution, the cooperation between the first screw 51, the first gasket 53, and the first nut 52 can ensure a reliable connection between the cover body 2 and the first side plate 3 when the pressure in the housing 100 is normal. When the tightening force between the cover body 2 and the first side plate A is less than the tightening force between the cover body 2 and the second side plate A, when the pressure in the housing reaches a certain level, the first nut 52 can be lifted a certain distance by the action of the cover body 2 and the first screw 51, and the cover body 2 can be deformed under the action of the pressure in the housing 100, forming a pressure relief gap between the cover body 2 and the first side plate A.

[0051] In a specific implementation, a first elastic washer 54 may be further provided between the first gasket 53 and the head of the first screw 51 , and the first elastic washer 54 is sleeved on the first screw 51 .

[0052] Figure 9 for Figure 7 The CC cross-sectional view of the housing 100 is shown in FIG. Figure 7 and Figure 9, at least one of the two second side plates 4 includes a second flanging structure 41. The second flanging structure 41 is located outside the housing 100, and the projection of the cover body 2 along the first direction D1 covers the projection of the second flanging structure 41. Specifically, the second flanging structure 41 includes a plurality of second through holes 411. The plurality of second through holes 411 are arranged at intervals in sequence along the second direction D2, and each second through hole 411 penetrates the second flanging structure 41 along the above-mentioned first direction D1. The second fixing method includes a plurality of second fixing units 6. Each second fixing unit 6 includes a second screw 61, a second nut 62, a reinforcing piece 63, and a second gasket 64. Each second through hole 411 corresponds to a second fixing unit 6. Specifically, taking one second through hole 411 and its corresponding second fixing unit 6 as an example, the second screw 61 of the second fixing unit 6 sequentially passes through the second gasket 64, the cover body 2, the second through hole 411, and the reinforcing piece 63, and is threadedly connected to the second nut 62. When the pressure in the housing 100 increases, the force acting on the cover body 2 in the direction away from the bottom plate 1 increases, and the force acting on the second flanging structure 41 by the second nut 62 also increases. The arrangement of the reinforcing piece 63 increases the contact area between the second nut 62 and the second flanging structure 41, thereby reducing the local stress near the second through hole 411, reducing the tendency of the second nut 62 to displace in the direction away from the bottom plate 1, and ensuring a reliable connection between the cover body 2 and the second flanging structure 41. Exemplarily, the reinforcing piece 63 can be a steel sheet. The reinforcing piece 63 can be fixed to the second flanging structure 41 by screws or pins, etc. The second nut 62 can be press riveted to the reinforcing piece 63, as Figure 10 shown. Of course, the fixing method between the second flanging structure 41 and the cover body 2 is not limited to the above scheme. The second flanging structure 41 and the cover body 2 can also be connected by means of rivets, etc.

[0053] In a specific implementation, a second elastic washer 65 can also be provided between the second gasket 64 and the head of the second screw 61. The second elastic washer 65 is sleeved on the second screw 61.

[0054] Please continue to refer to Figure 8 and Figure 9 , the cover body 2 of the housing 100 includes at least one third flanging structure 21, and the projection of each third flanging structure 21 along the first direction D1 covers the corresponding first flanging structure 31 or second flanging structure 41. Exemplarily, each third flanging structure 21 includes a plurality of fourth through holes 211. Along the first direction D1, each fourth through hole 211 penetrates one third flanging structure 21, and the projection of each fourth through hole 211 overlaps with the projection of a corresponding first through hole or the projection of a second through hole 411. That is to say, the third flanging structure 21 of the cover body 2 is connected to the corresponding first flanging structure 31 or second flanging structure 41 through the respective fourth through holes 211.

[0055] In a specific implementation manner, both of the two first side plates 3 include first flanging structures 31, both of the two second side plates 4 include second flanging structures 41, and the cover body 2 includes four third flanging structures 21. Along the first direction D1, the projections of the four third flanging structures 21 each cover the flanging structure of one side plate. Both of the two first side plates 3 are connected to the corresponding third flanging structures 21 by a first fixing method, and both of the two second side plates 4 are connected to the corresponding third flanging structures 21 by a second fixing method, and the fastening force of the first fixing method is less than the fastening force of the second fixing method. The lengths of both of the two first side plates 3 in the third direction D3 are less than the lengths of both of the two second side plates 4 in the second direction D2. That is to say, the housing 100 is in the shape of a cuboid, and the fastening force between the cover body 2 and the shorter side plates, that is, the first side plates 3, is less than the fastening force between the cover body 2 and the longer sides, that is, the second side plates 4. In this solution, when the pressure in the housing 100 is large enough, it can not only reduce the possibility of the cover body 2 flying off through the connection between the cover body 2 and the second side plates 4, but also enable the cover body 2 to deform at the joint with the first side plates 3 and form a pressure relief gap with the first side plates 3.

[0056] Further, the distance between two adjacent first through holes on the first flanging structure 31 is greater than the distance between two adjacent second through holes 411 on the second flanging structure 41, and the number of first through holes on the first flanging structure 31 is less than the number of second through holes 411 on the second flanging structure 41, so that it is easier to form a pressure relief gap between the cover body 2 and the first flanging structure 31 at the joint, and the connection reliability between the cover body 2 and the second flanging structure 41 is stronger.

[0057] When specifically setting the above-mentioned housing 100, the above-mentioned housing 100 includes a sealing ring 7, and the sealing ring 7 is located at the joints of the cover body 2 with the two first side plates 3 and the two second side plates 4 to achieve the sealing fit between the cover body 2 and the first side plates 3 and the second side plates 4, thereby protecting the electrical components 9 in the housing 100.

[0058] Figure 11 Schematic diagram of a sealing ring in a housing provided by an embodiment of the present application Figure 12 Cross-sectional view of a sealing ring in a housing provided by an embodiment of the present application, as Figure 11 and Figure 12 shown. In an optional implementation manner, a conductive layer 8 is provided on the inner surface of the sealing ring 7, and the cover body 2 is electrically connected to the two first side plates 3 and the two second side plates 4 through the conductive layer 8, so that the cover body 2 and the first side plates 3 and the second side plates 4 are continuously conducted, and the electromagnetic compatibility (EMC) shielding effect is better, and the performance of the photovoltaic inverter is more guaranteed.

[0059] Please continue to refer toFigure 12 When the above-mentioned sealing ring 7 is specifically set, the longitudinal cross-section m of the sealing ring 7 can be semicircular, that is, the sealing ring 7 includes a plane p and an arc surface q. The plane p of the sealing ring 7 is in contact with the first flange structure 31 and the second flange structure 41, and the portion of the sealing ring 7 facing the housing 100 accommodating cavity and the portion of the sealing ring 7 facing the housing 100 accommodating cavity are provided with conductive cloth to form the above-mentioned conductive layer 8. The portion of the sealing ring 7 facing away from the housing 100 accommodating cavity is provided with an adhesive surface to bond with the first flange structure 31 and the second flange structure 41. Of course, the setting of the sealing ring 7 is not limited to this. For example, the sealing ring 7 can also be clamped at the junction of the cover body 2 and the two first side panels 3 and the two second side panels 4, or prepared at the junction of the cover body 2 and the two first side panels 3 and the two second side panels 4 through a glue-dispensing foaming process. When spraying the cover body 2 and the first side panel 3 and the second side panel 4, the parts of the cover body 2 and the first side panel 3 and the second side panel 4 that are used for conductive connection with the sealing ring 7 can be shielded and protected to avoid the influence of spraying on the continuous connection and conductivity between the cover body 2 and the first side panel 3 and the second side panel 4.

[0060] It is worth noting that the housing 100 mentioned in the embodiment of the present application can also be used in a distribution box or a switch box, etc., and is not limited to being used in a photovoltaic inverter.

[0061] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A housing for electrical equipment, characterized in that, The housing includes a bottom plate, a cover, two first side plates, and two second side plates. The bottom plate and the cover are arranged opposite to each other along a first direction, the two first side plates are arranged opposite to each other along a second direction, and the two second side plates are arranged opposite to each other along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other pairwise, where: At least one of the two first side plates includes a first flanging structure, the first flanging structure is arranged on the outer side of the housing, and along the first direction, the projection of the cover covers the projection of the first flanging structure. The first flanging structure includes a plurality of first through holes, and the plurality of first through holes are arranged at intervals in sequence along the third direction on the first flanging structure, and each of the first through holes penetrates the first flanging structure along the first direction; At least one of the two second side plates includes a second flanging structure, the second flanging structure is arranged on the outer side of the housing, and along the first direction, the projection of the cover covers the projection of the second flanging structure. The second flanging structure includes a plurality of second through holes, and the plurality of second through holes are arranged at intervals in sequence along the second direction, and each of the second through holes penetrates the second flanging structure along the first direction.

2. The housing according to claim 1, wherein The length of the two first side plates along the third direction is less than the length of the two second side plates along the second direction.

3. The housing according to claim 1, characterized in that, The bottom plate, the two first side plates, and the two second side plates enclose to form a receiving cavity for receiving electrical components, where: Each of the first side plates is connected to the two second side plates respectively by a third fixing method, and the bottom plate is connected to the two first side plates and the two second side plates respectively by the third fixing method.

4. The housing according to claim 3, characterized in that, The third fixing method includes welding or integrally forming, the two pairs of side plates are fixedly connected in sequence, and each side plate is fixedly connected to the bottom plate.

5. The housing according to claim 1, characterized in that, Each of the first through holes is used to accommodate a first screw of a first fixing unit, and a first gasket, the cover, the first flanging structure, and a first nut are stacked in sequence along the first direction.

6. The housing according to claim 1, characterized in that, Each of the second through holes is used to accommodate a second screw of a second fixing unit, and a second gasket, the cover, the second flanging structure, a reinforcing plate, and a second nut are stacked in sequence along the first direction.

7. The housing according to claim 1 or 5, characterized in that, The cover includes at least one third flanging structure, and along the first direction, the projection of each third flanging structure covers the first flanging structure or the second flanging structure.

8. The housing according to claim 7, characterized in that, Each of the third flanging structures includes a plurality of fourth through holes, where: Along the first direction, each of the fourth through holes penetrates one of the third flanging structures, and the projection of each of the fourth through holes overlaps with the projection of one of the first through holes or the projection of one of the second through holes.

9. The housing according to claim 1, characterized in that, The housing includes a sealing ring, and the sealing ring is arranged at the joints of the cover with the two first side plates and the two second side plates.

10. The housing according to claim 9, characterized in that, A conductive layer is provided on the inner surface of the sealing ring, and the cover is electrically connected to the two first side plates and the two second side plates through the conductive layer.

11. The housing according to claim 1 or 5 or 6, characterized in that, The distance between two adjacent first through-holes among the plurality of first through-holes is greater than the distance between two adjacent second through-holes among the plurality of second through-holes.

12. The housing according to claim 1, wherein The number of first through-holes on the first side plate is less than the number of second through-holes on the second side plate.

13. The housing according to claim 5 or 6, characterized in that, The number of first through-holes on the first flanging structure is less than the number of second through-holes on the second flanging structure.

14. A photovoltaic inverter, characterized in that, It includes an electrical component and a housing for a power device according to any one of claims 1-13, the housing is used to accommodate the electrical component, and the electrical component includes a plurality of power tubes.

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