Inverter structure

Abstract

The embodiment of the utility model discloses an inverter structure, which comprises a box body, an upper cover, a first sealing ring, a radiator, a first sealing strip, a second sealing strip and a transformer assembly, wherein an electromagnetic shielding layer is arranged on the outer side surface of the first sealing ring; metal conducting layers are arranged on the outer side surfaces of the first sealing strip and the second sealing strip; the box body and the upper cover are in sealed connection and conductive connection through a first sealing ring, the radiator and the box body are in sealed connection and conductive connection through a first sealing strip, and the radiator and the transformer assembly are in sealed connection and conductive connection through a second sealing strip. By arranging the electromagnetic shielding layer or the metal conductive layer on the sealing ring and the sealing strip, the good conductivity and sealing performance of the whole inverter structure are ensured, the shielding effect is achieved, electromagnetic leakage and electromagnetic interference can be prevented, and the electromagnetic compatibility requirement is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to power electronics technical field, concretely relates to a kind of inverter structures. BACKGROUND

[0002] Photovoltaic inverter is the variable DC voltage generated by solar photovoltaic module, converted into commercial frequency AC power, can be connected to public power grid transmission system, or for off-grid power grid use, is indispensable part of photovoltaic system.Photovoltaic inverter is called the "brain" or "heart" of photovoltaic power generation system.With the continuous development of photovoltaic inverter, the electromagnetic compatibility performance requirement of cabinet is higher and higher, and good interference suppression processing of cabinet is particularly important.

[0003] The current inverter structure is not completely contacted between the upper cover of cabinet and the box body and between the box body and radiator due to the need of sealing, there is electromagnetic leakage at fault surface, it is difficult to achieve electromagnetic compatibility requirement, therefore, filter processing or magnetic ring is used to suppress electromagnetic interference in the cabinet to achieve electromagnetic compatibility requirement, increase cost. UTILITY MODEL CONTENT

[0004] Therefore, the utility model embodiment provides an inverter structure, guarantees the good conductivity and sealing property of entire inverter structure, has shielding effect, can prevent electromagnetic leakage and electromagnetic interference, achieves electromagnetic compatibility requirement.

[0005] The utility model embodiment provides an inverter structure, the inverter structure includes:

[0006] Box body;

[0007] Upper cover, detachably connected in the upper of the box body;

[0008] First sealing ring, at least part outer side is provided with electromagnetic shielding layer, the first sealing ring sealing connection is between the box body with the upper cover, and the box body with the upper cover is conducted through the electromagnetic shielding layer electrically connected;

[0009] Radiator, detachably connected in the lower of the box body;

[0010] First sealing strip, at least part outer side is provided with first metal conductive layer, the first sealing strip sealing connection is between the box body with the radiator, and the box body with the radiator is conducted through the first metal conductive layer electrically connected;

[0011] Transformer assembly, detachably connected on the radiator;

[0012] A second sealing strip is provided with a second metal conductive layer on at least a part of the outer side, and is connected between the transformer assembly and the heat sink in a conductive manner through the second metal conductive layer.

[0013] Optionally, an annular connecting groove is formed in the first sealing ring, and an opening of the connecting groove faces downward, and the top end of the box is inserted into the connecting groove.

[0014] Optionally, a guide strip is arranged on the inner wall of the connecting groove, and the guide strip is arranged obliquely upward, and an electromagnetic shielding layer is arranged on the outer side of the guide strip, the inner wall of the connecting groove and the outer side of the first sealing ring.

[0015] Optionally, the first sealing ring comprises a first sealing part and a second sealing part arranged in a top-down manner, the hardness of the second sealing part is greater than that of the first sealing part, and the connecting groove is arranged on the second sealing part.

[0016] Optionally, a deformation cavity is arranged in the first sealing part, one side of the deformation cavity is provided with an exhaust hole in communication with the outside, and the top end of the first sealing part is provided with two elastic contact strips, and the two elastic contact strips respectively extend obliquely upward to the left and right sides of the first sealing part.

[0017] Optionally, the first sealing strip and the second sealing strip are the same in structure, the first sealing strip and the second sealing strip are both provided with cavities, and the top end of the first sealing strip and the top end of the second sealing strip are both provided with two arc-shaped sealing parts.

[0018] Optionally, an annular first sealing groove is formed in the heat sink, the first sealing strip is arranged in the first sealing groove in a fitting manner, an annular second sealing groove is formed in the transformer assembly, and the second sealing strip is arranged in the second sealing groove in a fitting manner.

[0019] Optionally, the box is provided with a first flange on at least two opposite side edges of the opening, the first flange extends in a horizontal direction, the edge of the first flange is further provided with a second flange, the second flange is folded toward a distal end, the edge of the second flange is flush with the height of the other side edge of the opening of the box to be fully inserted into the connecting groove, the edge of the upper cover is provided with a third flange, and the third flange is folded toward a proximal end to shield the gap between the box and the upper cover and the first sealing ring.

[0020] Optionally, the upper cover and the box body are detachably connected through a plurality of first connecting pieces, the first connecting pieces include a press-in nut column, a press-in piece with a countersunk hole and a first bolt, the press-in nut column is fixed on the first flange, the press-in piece is fixed in a through hole of the upper cover, a shank of the first bolt is connected with the press-in nut column through the press-in piece to lock the upper cover and the box body, and the plurality of first connecting pieces are located inside the first sealing ring.

[0021] Optionally, the heat sink and the box body are detachably connected through a plurality of second connecting pieces, the transformer assembly and the heat sink are detachably connected through a plurality of third connecting pieces, the second connecting pieces include second bolts, the third connecting pieces include third bolts, shanks of the second bolts are threadedly connected with the heat sink through a bottom wall of the box body to lock the box body and the heat sink, shanks of the third bolts are threadedly connected with the transformer assembly through a bottom wall of the heat sink to lock the transformer assembly and the heat sink, the second bolts are located inside the first sealing strip, and the third bolts are located inside the second sealing strip.

[0022] The inverter structure provided by the embodiment of the present application comprises a box body, an upper cover, a first sealing ring provided with an electromagnetic shielding layer on an outer side surface, a heat sink, a first sealing strip and a second sealing strip provided with a metal conductive layer on outer side surfaces, and a transformer assembly, the box body and the upper cover are sealingly and conductively connected through the first sealing ring, the heat sink and the box body are sealingly and conductively connected through the first sealing strip, and the heat sink and the transformer assembly are sealingly and conductively connected through the second sealing strip. By arranging the electromagnetic shielding layer or the metal conductive layer on the sealing ring and the sealing strip, the conductivity and the sealing property of the entire inverter structure are ensured, the shielding effect is achieved, electromagnetic leakage and electromagnetic interference are prevented, and the electromagnetic compatibility requirement is met. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and other objects, features and advantages of the present application will become more apparent from the following description of the embodiments of the present application taken with reference to the accompanying drawings, in which:

[0024] Figure 1 is a structure schematic view of a first perspective of the inverter structure of the embodiment of the present application;

[0025] Figure 2 is a structure schematic view of a second perspective of the inverter structure of the embodiment of the present application

[0026] Figure 3 is an explosion schematic view of the inverter structure of the embodiment of the present application;

[0027] Figure 4is a first sectional view schematic diagram of the inverter structure of the embodiment of the utility model;

[0028] Figure 5 is Figure 4 is a A-A partial sectional view schematic diagram of the inverter structure in the middle of the embodiment of the utility model;

[0029] Figure 6 is the sectional schematic diagram of the first sealing ring of the embodiment of the utility model;

[0030] Figure 7 is Figure 4 is a B-B partial sectional view schematic diagram of the inverter structure in the middle of the embodiment of the utility model;

[0031] Figure 8 is the sectional schematic diagram of the first sealing strip and the second sealing strip of the embodiment of the utility model;

[0032] Figure 9 is the second sectional view schematic diagram of the inverter structure of the embodiment of the utility model;

[0033] Figure 10 is Figure 9 is a C-C partial sectional view schematic diagram of the inverter structure in the middle of the embodiment of the utility model.

[0034] Reference signs:

[0035] 1-box;11-first flanging;12-second flanging;2-upper cover;21-third flanging;22-through hole;3-first sealing ring;31-electromagnetic shielding layer;32-connecting groove;33-conducting strip;34-first sealing part;341-deformation cavity;342-exhaust hole;343-elastic contact strip;35-second sealing part;4-radiator;41-first sealing groove;5-first sealing strip;51-first metal conductive layer;6-transformer assembly;61-second sealing groove;7-second sealing strip;71-second metal conductive layer;8-cavity;81-arc-shaped sealing part;9-first connecting piece;91-riveting nut column;92-riveting piece;921-counter sunk hole;93-first bolt;94-sealing element;941-sealing gasket;942-sealing sleeve;10-second connecting piece;100-third connecting piece. DETAILED DESCRIPTION

[0036] The present application is described below based on the embodiments, but the present application is not limited to only these embodiments. In the following detailed description of the present application, some specific details are described in detail. The present application can also be fully understood without the description of these details. In order to avoid confusion of the essence of the present application, the well-known methods, processes, procedures, elements and circuits are not described in detail.

[0037] Moreover, it is to be understood that the drawings provided herein are for illustrative purposes and are not necessarily to scale.

[0038] Unless otherwise defined, the terms "mounting", "connected", "connecting", "fixed", and the like are to be construed as broad terms, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements or interaction relationship of two elements, unless otherwise explicitly defined. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0039] Unless the context clearly requires otherwise, throughout the application, the terms "comprise", "comprising", and the like are to be construed as inclusive, rather than exclusive or exhaustive; that is, in the sense of "including, but not limited to".

[0040] In the description of the present application, it should be understood that the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise stated, the meaning of "multiple" is two or more.

[0041] Figures 1-4 is a structural schematic diagram of the inverter structure of the embodiment. As shown in Figures 1-4 The inverter structure includes a box body 1, an upper cover 2, a first sealing ring 3, a heat sink 4, a first sealing strip 5, a transformer assembly 6 and a second sealing strip 7. The upper cover 2 is detachably connected above the box body 1 for sealing the top of the box body 1; the heat sink 4 is detachably connected below the box body 1 for sealing the bottom of the box body 1; the transformer assembly 6 is detachably connected on the heat sink 4, so that the entire inverter structure is completely sealed.

[0042] In the embodiment, the box body 1, the upper cover 2, the heat sink 4 and the transformer assembly 6 are made of metal. The shell made of metal has electromagnetic shielding performance, which can ensure that the formed inverter structure has high electromagnetic compatibility performance, and has the same electrical performance and modeling richness as metal die casting.

[0043] The first sealing ring 3 is arranged between the box body 1 and the upper cover 2, and the upper cover 2 and the box body 1 are detachably connected by a plurality of first connecting pieces 9. The box body 1 and the upper cover 2 are pressed and connected by the first connecting pieces 9, which causes the first sealing ring 3 to elastically deform and tightly abut the box body 1 and the upper cover 2, so that the box body 1 and the upper cover 2 are sealed, realizing the waterproof, dustproof and other functions of the top of the box body 1.

[0044] As shown in Figure 6As shown, at least part of the outer side of the first sealing ring 3 is provided with an electromagnetic shielding layer 31. Figure 5 As shown, after the box body 1 and the upper cover 2 are connected together, the part of the first sealing ring 3 with the electromagnetic shielding layer 31 can be in contact with the box body 1 and the upper cover 2, so that the box body 1 and the upper cover 2 can be electrically connected through the electromagnetic shielding layer 31 at the fault. The first sealing ring 3 has good sealing effect and good electromagnetic shielding function, which can prevent electromagnetic leakage and electromagnetic interference at the fault and meet the electromagnetic compatibility requirements.

[0045] In the embodiment, the first sealing ring 3 is provided with an annular connecting groove 32, and the opening of the connecting groove 32 is downward, as shown in Figure 6 As shown, the size and shape of the annular connecting groove 32 match the size and shape of the top end of the box body 1, so that the top end of the box body 1 can be inserted into the connecting groove 32. The connection mode of the first sealing ring 3 and the box body 1 can prevent the first sealing ring 3 from being extruded and dislocated during the connection of the upper cover 2 and the box body 1, thereby improving the sealing performance and electromagnetic shielding performance of the connection. The inner wall of the connecting groove 32 is provided with an electromagnetic shielding layer 31, which is in communication with the electromagnetic shielding layer 31 on the outer side of the first sealing ring 3, so as to ensure that the box body 1 and the upper cover 2 can be electrically connected.

[0046] In some embodiments, the inner wall of the connecting groove 32 is provided with a guide strip 33, as shown in Figure 6 The guide strip 33 can assist the first sealing ring 3 to be clamped on the box body 1, so as to prevent the first sealing ring 3 from shaking and falling off the box body 1. The number of guide strips 33 can be set according to requirements, and is not limited in particular. Preferably, the guide strip 33 is inclined upward, which facilitates the insertion of the top of the box body 1 into the connecting groove 32, and also reversely increases the friction between the guide strip 33 and the box body 1, thereby preventing the first sealing ring 3 from being separated from the box body 1. The outer side of the guide strip 33, the inner wall of the connecting groove 32 and the outer side of the first sealing ring 3 are provided with the electromagnetic shielding layer 31 in communication. One side of the electromagnetic shielding layer 31 can be extended to the inside of the connecting groove 32 and in contact with the box body 1 for electrical connection, and the other side of the electromagnetic shielding layer 31 can be extended to the top of the first sealing ring 3 and in contact with the upper cover 2 for electrical connection, thereby meeting the electromagnetic compatibility requirements and electromagnetic anti-interference requirements of the inverter structure as a whole.

[0047] In some embodiments, the first sealing ring 3 includes a first sealing part 34 and a second sealing part 35 arranged in an up-down manner, as shown in Figure 6The first sealing part 34 and the second sealing part 35 are made of the same material but have different hardness. The second sealing part 35 has a greater hardness than the first sealing part 34, and the connecting groove 32 is arranged on the second sealing part 35 to ensure that the first sealing ring 3 has a higher hardness and can be clamped on the box body 1. The first sealing part 34 has a lower hardness and is located outside the top of the box body 1 to abut against the upper cover 2 and easily deform to achieve good sealing and conductive connection between the upper cover 2 and the box body 1.

[0048] Optionally, the first sealing part 34 is provided with a deformation cavity 341, and one side of the deformation cavity 341 is provided with an exhaust hole 342 communicating with the outside, as shown in Figure 6 The deformation cavity 341 is used to provide space for the deformation of the first sealing part 34, and the exhaust hole 342 is used to exhaust the deformation cavity 341 to achieve better sealing effect when being pressed. The side wall of the second sealing part 35 can also be provided with a cavity and an opening according to requirements. In other optional embodiments, the first sealing part 34 can be a solid structure.

[0049] In some embodiments, the top end of the first sealing part 34 is provided with two elastic contact strips 343, and the two elastic contact strips 343 respectively extend obliquely upward towards the left and right sides of the first sealing part 34, as shown in Figure 6 That is, the two elastic contact strips 343 are symmetrically arranged outside the top end of the first sealing part 34, one elastic contact strip 343 obliquely towards the upper left, and the other elastic contact strip 343 obliquely towards the upper right. The two elastic contact strips 343 can make the upper cover 2 more closely connected therewith to improve the sealing effect. The outer side of the elastic contact strip 343, part of the top surface and part of the side surface of the first sealing part 34, part of the outer side surface of the second sealing part 35, and the inner wall of the connecting groove on the same side, and the outer side of the guide strip are all provided with an electromagnetic shielding layer 31 and are in communication to achieve conductive connection between the upper cover 2 and the box body 1 at the fault.

[0050] In some embodiments, the entire outer side of the first sealing ring 3 and the inner wall of the connecting groove 32 are all provided with an electromagnetic shielding layer 31, and the first sealing ring 3 is in conductive connection with the upper cover 2 and the box body 1 regardless of how it deforms, thereby improving the electromagnetic compatibility and electromagnetic shielding effect of the inverter structure.

[0051] The electromagnetic shielding layer 31 can be formed by coating a conductive material on the surface of the first sealing ring 3 or directly pasting a conductive patch on the surface of the first sealing ring 3. In addition, the first sealing ring 3 can also be made of a material with conductive properties, such as foamed conductive rubber, which not only has good sealing effect but also has good electromagnetic shielding function.

[0052] As shown in Figure 3As shown, the opening of the housing 1 has at least two oppositely positioned sides integrally formed with first flanges 11. The first flanges 11 extend horizontally, and their edges are also integrally formed with second flanges 12. The second flanges 12 fold towards the distal end (i.e., the first flanges 11 are perpendicular to the side walls of the housing 1). The edge of the second flange 12 is flush with the height of the other sides of the opening of the housing 1 (i.e., the sides without the first flanges 11), allowing them to be fully inserted into the connecting groove 32 of the first sealing ring 3, improving the sealing performance and electrical conductivity between the housing 1 and the top cover 2. Here, "near end" refers to the end closer to the radiator 4; "far end" refers to the end farther from the radiator 4. Figure 1 and Figure 4 For example, Figure 1 and Figure 4 The lower side is the proximal end. Figure 1 and Figure 4 The upper side is the distal end.

[0053] In other alternative embodiments, the four sides of the opening of the housing 1 are integrally formed with first flanges 11, which extend horizontally. The edges of the first flanges 11 are also integrally formed with second flanges 12, which are folded towards the distal end. In this case, the edges of the second flanges 12 of the housing 1 are completely inserted into the connecting grooves 32 of the first sealing ring 3, thereby achieving installation with the first sealing ring 3.

[0054] When the housing 1 and the top cover 2 are installed, the first sealing ring 3 is pressed tightly against the housing 1 and the top cover 2. Multiple first connecting parts 9 are located inside the first sealing ring 3. The first sealing ring 3 is used to prevent rainwater from approaching the gap between the first connecting parts 9 and the housing 1, and to prevent rainwater from seeping into the housing 1 from the gap between the first connecting parts 9 and the housing 1.

[0055] The first connecting member 9 includes a press-fit nut post 91, a press-fit member 92 with a countersunk hole 921, and a first bolt 93, as shown below. Figure 10 As shown. The press-fit nut post 91 is fixed to the first flange 11, and the press-fit part 92 is fixed inside the through hole 22 of the upper cover 2. The shank of the first bolt 93 passes through the countersunk hole 921 of the press-fit part 92 and is threadedly connected to the press-fit nut post 91, thereby locking the upper cover 2 to the housing 1. Multiple press-fit nut posts 91 are evenly arranged along the first flange 11. Multiple press-fit parts 92 are evenly arranged along the housing 1, each corresponding one-to-one with a multiple press-fit nut post 91.

[0056] Specifically, the far end face of the rivet 92 is flush with the far end face of the upper cover 2, and the near end face of the rivet 92 protrudes from the near end face of the upper cover 2. After the shank of the first bolt 93 is threadedly connected to the rivet nut post 91, the head of the first bolt 93 is embedded in the countersunk hole 921 and does not protrude from the far end face of the upper cover 2, which improves the aesthetics of the inverter structure and also enables front-side operation and maintenance (disassembly and installation) of the inverter structure.

[0057] The first connecting member 9 also includes a sealing element 94, disposed between the press-fit member 92 and the press-fit nut post 91, such as Figure 10 As shown. When the upper cover 2 is closed with the housing 1, the shank of the first bolt 93 passes through the countersunk hole 921 of the press-fit part 92 and the sealing element 94 in sequence, and then engages with the press-fit nut post 91 to seal and lock the upper cover 2 and the housing 1. The sealing element 94 can prevent rainwater from entering and plays a sealing role.

[0058] The sealing element 94 includes a sealing gasket 941 and a sealing sleeve 942 surrounding the edge of the sealing gasket 941. The sealing gasket 941 has a mounting hole and is positioned between the proximal end face of the press-fit member 92 and the distal end face of the press-fit nut post 91. The sealing sleeve 942 surrounds the outer side of the press-fit nut post 91. The structure of the sealing element 94 allows it to be mounted on the press-fit nut post 91, preventing it from falling off.

[0059] Furthermore, the edge of the upper cover 2 is integrally formed with a third flange 21, which folds towards the proximal end, such as... Figure 5 As shown. Wherein, after the top cover 2 is connected to the box body 1, the third flange 21 is located parallel to the outside of the top cover 2 (that is, the outside of the second flange 12 and the outside of the part where the first flange 11 is not provided), and is used to cover the gap between the box body 1 and the top cover 2 and the first sealing ring 3.

[0060] like Figure 7 and Figure 9 As shown, the first sealing strip 5 is disposed between the housing 1 and the radiator 4, and the housing 1 and the radiator 4 are detachably connected by the second connector 10. During the pressing connection process of the housing 1 and the radiator 4 through the second connector 10, the first sealing strip 5 is squeezed to cause it to elastically deform and press against the housing 1 and the radiator 4, thereby sealing the housing 1 and the radiator 4 and achieving the functions of waterproofing and dustproofing the bottom of the housing 1.

[0061] like Figure 8As shown, at least part of the outer side of the first sealing strip 5 is provided with a first metal conductive layer 51. After the cabinet 1 and the heat sink 4 are connected together, the part of the first sealing strip 5 with the first metal conductive layer 51 can be in contact with the cabinet 1 and the heat sink 4, so that the cabinet 1 and the heat sink 4 can be conductively connected at the fault through the first metal conductive layer 51. The first sealing strip 5 has good sealing effect and good electromagnetic shielding function, which can prevent electromagnetic leakage and electromagnetic interference at the fault and meet the electromagnetic compatibility requirements.

[0062] In the embodiment, the first sealing strip 5 is internally provided with a cavity 8, which is used to provide space for the deformation of the first sealing strip 5. Optionally, one side of the cavity 8 is provided with an exhaust hole in communication with the outside, which is used to exhaust the cavity 8, so that the sealing effect is better when extruded. In other optional embodiments, the first sealing strip 5 can be solid structure.

[0063] In some embodiments, the top end of the first sealing strip 5 is provided with two arc-shaped sealing parts 81, as shown. Figure 8 The two arc-shaped sealing parts 81 can increase the contact area with the cabinet 1, so that the cabinet 1 and the first sealing strip 5 are more tightly connected, improving the sealing effect. The outer side of one arc-shaped sealing part 81, part of the side and the bottom of the first sealing strip 5 are all provided with the first metal conductive layer 51 in communication, so that the heat sink 4 and the cabinet 1 are conductively connected at the fault.

[0064] In some embodiments, the entire outer side of the first sealing strip 5 is provided with the first metal conductive layer 51, which is conductively connected with the heat sink 4 and the cabinet 1 regardless of the deformation of the first sealing strip 5, improving the electromagnetic compatibility and electromagnetic shielding effect of the inverter structure. The first metal conductive layer 51 can be formed by coating conductive material on the surface of the first sealing strip 5, or by directly pasting conductive patches on the surface of the first sealing strip 5. In addition, the first sealing strip 5 can also be formed of a material with conductive properties, such as foamed conductive rubber, which not only has good sealing effect, but also has good electromagnetic shielding function.

[0065] In some embodiments, the heat sink 4 is provided with a ring-shaped first sealing groove 41, and the first sealing strip 5 is arranged in the first sealing groove 41, and the top of the first sealing strip 5 can extend out of the first sealing groove 41. When the heat sink 4 and the cabinet 1 are installed, the first sealing strip 5 is tightly pressed by the cabinet 1 and the heat sink 4, the first sealing strip 5 is located outside the opening at the bottom of the cabinet 1, and the plurality of second connecting pieces 10 are located inside the first sealing strip 5 and outside the opening at the bottom of the cabinet 1, the first sealing strip 5 is used to block the rainwater from approaching the gap between the second connecting piece 10 and the cabinet 1, so as to prevent the rainwater from seeping into the cabinet 1 through the gap between the second connecting piece 10 and the cabinet 1.

[0066] The first sealing groove 41 has the same shape as the opening of the bottom wall of the box body 1 and surrounds the outside of the opening of the bottom wall of the box body 1. The first sealing strip 5 has the same shape as the first sealing groove 41, such as a rectangular ring shape, a circular ring shape, etc.

[0067] The second connecting piece 10 includes a second bolt. The bottom wall of the box body 1 is provided with a first connecting hole, and the heat sink 4 is provided with a first threaded hole located on the inside of the first sealing groove 41 and corresponding to the first connecting hole. The rod of the second bolt is threadedly connected to the first threaded hole of the heat sink 4 through the first connecting hole of the bottom wall of the box body 1, thereby locking the box body 1 and the heat sink 4. Preferably, a plurality of second bolts are uniformly arranged along the circumference of the bottom wall of the box body 1.

[0068] The second sealing strip 7 is arranged between the transformer assembly 6 and the heat sink 4, and the transformer assembly 6 and the heat sink 4 are detachably connected through a third connecting piece 100. During the pressing connection of the transformer assembly 6 and the heat sink 4 through the third connecting piece 100, the second sealing strip 7 is extruded to elastically deform and tightly abut against the transformer assembly 6 and the heat sink 4, thereby sealing the transformer assembly 6 and the heat sink 4 and achieving the waterproof and dustproof effects of the entire box body 1.

[0069] As shown in Figure 8 At least part of the outer side surface of the second sealing strip 7 is provided with a second metal conductive layer 71. After the transformer assembly 6 and the heat sink 4 are connected together, the part of the second sealing strip 7 with the second metal conductive layer 71 can contact the transformer assembly 6 and the heat sink 4, so that the transformer assembly 6 and the heat sink 4 can be conductively connected through the second metal conductive layer 71 at the fault. The second sealing strip 7 has good sealing effect and good electromagnetic shielding function, can prevent electromagnetic leakage and electromagnetic interference at the fault, and meets the electromagnetic compatibility requirements.

[0070] In the embodiment, the first sealing strip 5 and the second sealing strip 7 have the same structure, and the second sealing strip 7 is internally provided with a cavity 8 for providing space for the deformation of the second sealing strip 7. Optionally, one side of the cavity 8 is provided with an exhaust hole communicating with the outside for exhausting the cavity 8, so that the extrusion has better sealing effect. In other optional embodiments, the second sealing strip 7 can be a solid structure.

[0071] In some embodiments, the top end of the second sealing strip 7 is provided with two arc-shaped sealing portions 81, as shown in Figure 8The two arc-shaped sealing portions 81 can increase the contact area with the heat sink 4, can make the heat sink 4 and the second sealing strip 7 be connected more tightly, and improve the sealing effect. The outer side of one arc-shaped sealing portion 81, part of the side of the second sealing strip 7 and the bottom are all provided with the second metal conductive layer 71 in communication, so that the heat sink 4 and the transformer assembly 6 are conductively connected at the fault.

[0072] In some embodiments, the entire outer side of the second sealing strip 7 is provided with the second metal conductive layer 71, and the second sealing strip 7 is conductively connected with the heat sink 4 and the transformer assembly 6 regardless of the deformation of the second sealing strip 7, thereby improving the electromagnetic compatibility and electromagnetic shielding effect of the inverter structure. The second metal conductive layer 71 can be formed by coating a conductive material on the surface of the second sealing strip 7 or by directly pasting a conductive patch on the surface of the second sealing strip 7. In addition, the second sealing strip 7 can be formed of a material with conductive properties, such as foamed conductive rubber, which not only has good sealing effect but also has good electromagnetic shielding function.

[0073] In some embodiments, the transformer assembly 6 is provided with a ring-shaped second sealing groove 61, and the second sealing strip 7 is arranged in the second sealing groove 61, and the top of the second sealing strip 7 can extend out of the second sealing groove 61. When the heat sink 4 and the transformer assembly 6 are installed, the second sealing strip 7 is tightly attached to the transformer assembly 6 and the heat sink 4, the second sealing strip 7 is located outside the opening of the heat sink 4, and a plurality of third connecting pieces 100 are located inside the second sealing strip 7 and outside the opening of the heat sink 4, the second sealing strip 7 is used to prevent rainwater from approaching the gap between the third connecting piece 100 and the heat sink 4, so as to prevent rainwater from seeping into the box body 1 through the gap between the third connecting piece 100 and the heat sink 4. The shape of the second sealing groove 61 is the same as that of the opening of the heat sink 4, and surrounds the outside of the opening of the heat sink 4; the shape of the second sealing strip 7 is the same as that of the second sealing groove 61. For example, rectangular ring shape, circular ring shape, etc.

[0074] The third connecting piece 100 includes a third bolt. The heat sink 4 is provided with a second connecting hole, and the transformer assembly 6 is provided with a second threaded hole located inside the second sealing groove 61 and corresponding to the second connecting hole. The rod of the third bolt is threadedly connected with the second threaded hole of the transformer assembly 6 through the second connecting hole of the heat sink 4, so as to lock the transformer assembly 6 and the heat sink 4. Preferably, a plurality of third bolts are uniformly arranged along the circumference of the heat sink 4. When the third bolt includes four, it is located at the four corners of the heat sink 4.

[0075] The box, the upper cover, the radiator and the transformer assembly of the inverter structure of the application are detachably connected, and the first sealing ring with an electromagnetic shielding layer, the first sealing strip and the second sealing strip with a metal conductive layer are arranged to ensure the sealing and conductivity between the box, the upper cover, the radiator and the transformer assembly, so that the entire inverter structure has good conductivity and sealing, has a shielding effect, can prevent electromagnetic leakage and electromagnetic interference, and meets the electromagnetic compatibility requirement.

[0076] The above description is only the preferred embodiment of the application and is not used to limit the application. The application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. An inverter structure, characterized by comprising: The inverter structure comprises: a box body (1); an upper cover (2) detachably connected above the box body (1); a first sealing ring (3) having an electromagnetic shielding layer (31) arranged on at least a part of the outer side thereof, the first sealing ring (3) being sealingly connected between the box body (1) and the upper cover (2), and the box body (1) and the upper cover (2) being electrically connected through the electromagnetic shielding layer (31); a heat sink (4) detachably connected below the box body (1); a first sealing strip (5) having a first metal conductive layer (51) arranged on at least a part of the outer side thereof, the first sealing strip (5) being sealingly connected between the box body (1) and the heat sink (4), and the box body (1) and the heat sink (4) being electrically connected through the first metal conductive layer (51); a transformer assembly (6) detachably connected on the heat sink (4); a second sealing strip (7) having a second metal conductive layer (71) arranged on at least a part of the outer side thereof, the second sealing strip (7) being sealingly connected between the transformer assembly (6) and the heat sink (4), and the transformer assembly (6) and the heat sink (4) being electrically connected through the second metal conductive layer (71).

2. The inverter structure of claim 1, wherein, An annular connecting groove (32) is formed in the first sealing ring (3), and the opening of the connecting groove (32) faces downward, and the top end of the box body (1) is inserted into the connecting groove (32).

3. The inverter structure of claim 2, wherein, The inner wall of the connecting groove (32) is provided with a guide strip (33) which is inclined upward, and the outer side of the guide strip (33), the inner wall of the connecting groove (32) and the outer side of the first sealing ring (3) are provided with a continuous electromagnetic shielding layer (31).

4. The inverter structure of claim 2, wherein, The first sealing ring (3) comprises a first sealing part (34) and a second sealing part (35) arranged in sequence, the hardness of the second sealing part (35) is greater than that of the first sealing part (34), and the connecting groove (32) is arranged on the second sealing part (35).

5. The inverter structure of claim 4, wherein, A deformation cavity (341) is arranged in the first sealing part (34), one side of the deformation cavity (341) is provided with an exhaust hole (342) in communication with the outside, and the top end of the first sealing part (34) is provided with two elastic contact strips (343) which respectively extend to the left and right sides of the first sealing part (34) in an inclined upward manner.

6. The inverter structure of claim 1, wherein, The first sealing strip (5) and the second sealing strip (7) are the same in structure, cavities (8) are arranged in the first sealing strip (5) and the second sealing strip (7), and the top end of the first sealing strip (5) and the second sealing strip (7) is provided with two arc-shaped sealing parts (81).

7. The inverter structure of claim 6, wherein, An annular first sealing groove (41) is formed in the heat sink (4), the first sealing strip (5) is arranged in the first sealing groove (41) in a fitted manner, an annular second sealing groove (61) is formed in the transformer assembly (6), and the second sealing strip (7) is arranged in the second sealing groove (61) in a fitted manner.

8. The inverter structure of claim 2, wherein, The opening of the box body (1) is provided with a first flange (11) on at least two opposite side edges, the first flange (11) extends in the horizontal direction, the edge of the first flange (11) is further provided with a second flange (12), the second flange (12) is folded towards the distal end, the edge of the second flange (12) is flush with the height of the other side edge of the opening of the box body (1) to be fully inserted into the connecting groove (32), the edge of the upper cover (2) is provided with a third flange (21), the third flange (21) is folded towards the proximal end to block the gap between the box body (1) and the upper cover (2) and the first sealing ring (3).

9. The inverter structure of claim 8, wherein, The upper cover (2) and the box body (1) are detachably connected by a plurality of first connecting pieces (9), the first connecting piece (9) includes a press-in nut column (91), a press-in piece (92) with a countersunk hole (921) and a first bolt (93), the press-in nut column (91) is fixed on the first flange (11), the press-in piece (92) is fixed in the through hole (22) of the upper cover (2), the rod of the first bolt (93) is connected with the press-in piece (92) and the press-in nut column (91) to lock the upper cover (2) and the box body (1), a plurality of first connecting pieces (9) are located inside the first sealing ring (3).

10. The inverter structure of claim 1, wherein, The heat sink (4) and the box body (1) are detachably connected by a plurality of second connecting pieces (10), the transformer assembly (6) and the heat sink (4) are detachably connected by a plurality of third connecting pieces (100), the second connecting piece (10) includes a second bolt, the third connecting piece (100) includes a third bolt, the rod of the second bolt is threadedly connected with the heat sink (4) through the bottom wall of the box body (1) to lock the box body (1) and the heat sink (4), the rod of the third bolt is threadedly connected with the transformer assembly (6) through the bottom wall of the heat sink (4) to lock the transformer assembly (6) and the heat sink (4), the second bolt is located inside the first sealing strip (5), and the third bolt is located inside the second sealing strip (7).

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