CN219740224U

CN219740224U - Photovoltaic inverter shell with electromagnetic compatibility function

Info

Publication number: CN219740224U
Application number: CN202321236284.5U
Authority: CN
Inventors: 张天雄; 吉飞洲; 宋云辉; 卢盈; 吴生闻
Original assignee: Elsevier Technology Co ltd
Current assignee: Elsevier Technology Co ltd
Priority date: 2023-05-22
Filing date: 2023-05-22
Publication date: 2023-09-22
Anticipated expiration: 2033-05-22

Abstract

The utility model discloses a photovoltaic inverter shell with an electromagnetic compatibility function, which comprises a box body and an upper cover, wherein the box body is provided with an open upper opening end, the upper cover is fixedly connected to the box body so as to seal the upper opening end, the photovoltaic inverter shell also comprises a plurality of elastic pieces which can conduct electricity and elastically deform, each elastic piece comprises a clamping hook part, an abutting part and a bending part positioned between the clamping hook part and the abutting part, after the box body and the upper cover are assembled, the clamping hook part is clamped on the box body and is in contact conduction with the box body, the abutting part is in abutting contact with the inner surface of the upper cover and is in mutual conduction, and the bending part has a tendency of resetting so that the abutting part abuts against the upper cover. The photovoltaic inverter shell disclosed by the utility model realizes an electromagnetic compatibility function, and the elastic sheet is not easy to fall off.

Description

Photovoltaic inverter shell with electromagnetic compatibility function

Technical Field

The utility model belongs to the field of photovoltaic inverters, and particularly relates to a photovoltaic inverter shell with an electromagnetic compatibility function.

Background

The photovoltaic inverter can convert direct current generated by the photovoltaic solar panel or direct current in the storage battery pack into alternating current, and the electric quantity of the photovoltaic solar panel is stored in the storage battery to supply power for a load, which is particularly common in household energy storage systems. The design of electromagnetic compatibility of the photovoltaic inverter itself is becoming more important in the face of increasingly complex and severe electromagnetic environments and environmental standards for household energy storage. Compared with the modes of grounding, lap joint and the like, the electromagnetic shielding structure design is more excellent in electromagnetic energy leakage and electromagnetic energy interference prevention. The principle of electromagnetic shielding structure design is to separate the shielding region from other regions by utilizing the electromagnetic energy emission, absorption and guiding effects of the shielding body. Therefore, cutting off the propagation path of electromagnetic waves is a key place for electromagnetic shielding design.

The shape of the shielding shell has obvious influence on the shielding effectiveness, and theoretically, the totally-enclosed metal box can have the best electric field shielding effect, and various seams, holes and the like are inevitably formed in the practically-used shielding body, so that the shielding shell becomes a main way for electromagnetic energy leakage. A longer gap still exists between the upper cover and the box body of the existing photovoltaic inverter after the screws are locked, and electromagnetic energy leakage caused by the gap is extremely large. In order to solve the above problems, it has been designed to provide a conductive member between a case and a case cover, and after the case and the case cover are fixed to each other, a pressure generated by compression of the conductive member acts on the case and the case cover to ensure an electromagnetic shielding effect, thereby solving the problem of electromagnetic incompatibility, but the provided conductive member is easy to fall off and is not firmly connected with the case and the case cover.

Disclosure of Invention

In order to solve the technical problems, the utility model provides an improved photovoltaic inverter housing with an electromagnetic compatibility function.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a photovoltaic inverter casing with electromagnetic compatibility function, includes box and upper cover, the box has open upper open end, upper cover fixed connection in on the box with upper open end seals, photovoltaic inverter casing still includes a plurality of elastic pieces that can electrically conduct and elastic deformation, every the elastic piece includes trip portion, butt portion and is located trip portion with the kink between the butt portion, the box with after the upper cover assembly, trip portion card is in on the box and with the box contact switches on, the butt portion with the internal surface of upper cover supports tight contact and switches on each other, the kink has the trend that resets so that butt portion supports to press the upper cover.

Preferably, the box body is provided with a turned edge extending upwards, the clamping hook part is provided with a clamping groove, and the turned edge is clamped into the clamping groove after the box body and the upper cover are assembled.

More preferably, the clamping groove has a downward facing notch, the lower portion of the clamping groove having a width less than the width of the upper portion of the clamping groove and less than the wall thickness of the flange, the width of the upper portion of the clamping groove being greater than the wall thickness of the flange.

Preferably, the elastic piece further has a flared guide portion extending obliquely from the notch of the clamping groove to guide the flange into the clamping groove.

More preferably, the elastic sheet further has an inclined clamping part extending from the groove wall of the clamping groove to the clamping groove, a limit groove is formed in the flanging, and the inclined clamping part is inserted into the limit groove after the box body and the upper cover are assembled.

Preferably, the oblique clamping part and the clamping hook part are integrally formed, the oblique clamping part bends towards the inside of the clamping groove after being cut in the clamping hook part, a cutting groove is formed in the clamping hook part, and one side edge of the oblique clamping part is connected with one side edge of the cutting groove.

Preferably, before the box and the upper cover are assembled, the abutting portion has an elevation angle of 10 to 30 degrees; after the box body and the upper cover are assembled, the abutting part is horizontally arranged.

More preferably, the abutting portion is located above the hook portion, and the bending portion extends obliquely; the elastic sheet is formed by sequentially connecting the abutting part, the bending part, a corner part, the clamping hook part and an outward expansion guide part, and is formed by bending and cutting a metal sheet.

Preferably, the box body is provided with a first side, a second side, a third side and a fourth side, the photovoltaic inverter housing further comprises a sheet metal structural member vertically arranged in the box body and adjacent to the first side, the upper end of the sheet metal structural member is higher than the top end of the box body, one or more elastic sheets are respectively arranged on the second side, the third side and the fourth side, and after the box body and the upper cover are assembled, the upper end of the sheet metal structural member is in contact conduction with the inner surface of the upper cover; before the box body and the upper cover are assembled, the abutting part of each elastic sheet is higher than the sheet metal structural part.

Preferably, the box body is provided with a positioning groove for positioning the elastic sheet, and the positioning groove is recessed downwards.

Compared with the prior art, the utility model has the following advantages:

according to the photovoltaic inverter shell with the electromagnetic compatibility function, after the box body and the upper cover are assembled, the abutting part is horizontally arranged and is in close contact with the inner surface of the upper cover, the clamping hook part of the elastic sheet is clamped on the box body, the bending part between the abutting part and the clamping hook part is elastically deformed due to extrusion, the elastic sheet is firmly installed and is not easy to loosen, tight intermetallic contact among the elastic sheet, the box body and the upper cover is fully ensured, the elastic sheet, the box body and the upper cover are mutually conducted, electromagnetic energy leakage caused by long gaps existing between the upper cover and the box body after screw locking is effectively avoided, and the electromagnetic compatibility function is realized.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a structural view of a photovoltaic inverter housing according to an embodiment of the present utility model, wherein an upper cover is not shown;

fig. 2 is another structural view of a photovoltaic inverter housing according to an embodiment of the present utility model, wherein an upper cover is not shown;

fig. 3 is a structural view of an upper cover according to an embodiment of the present utility model;

FIG. 4 is a perspective view of a spring plate according to an embodiment of the present utility model;

fig. 5 is a partial schematic view of the assembled case and upper cover according to the embodiment of the present utility model.

Wherein, the liquid crystal display device comprises a liquid crystal display device,

1. a case; 11. an upper open end; 12. flanging; 121. a limit groove; 13. a first side; 14. a second side; 15. a third side; 16. a fourth side; 17. sheet metal structural member; 18. a positioning groove; 2. an upper cover; 3. a spring plate; 311. a clamping groove; 312. cutting a groove; 32. an abutting portion; 33. a bending part; 34. an outward expansion guide part; 35. an inclined clamping part; 36. and a corner part.

Detailed Description

Preferred embodiments of the present utility model will be described in detail below with reference to the attached drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art. The description of these embodiments is provided to assist understanding of the present utility model, but is not intended to limit the present utility model. In addition, technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Referring to fig. 1 to 5, a photovoltaic inverter housing with electromagnetic compatibility function of the present embodiment includes a housing 1, an upper cover 2, a plurality of elastic sheets 3 capable of conducting electricity and elastically deforming, and a sheet metal structural member 17, wherein the sheet metal structural member 17 is located on the right side in the housing 1.

Further, the case 1 has an open upper open end 11 and an upwardly extending flange 12, and the upper cover 2 is fixedly attached to the upper side of the case 1 to close the upper open end 11.

Referring to fig. 4, the spring plate 3 is formed by bending and cutting a metal sheet, and specifically, the material of the spring plate 3 is stainless steel with the marks of X10CrNi18-8, 1Cr17Ni7 or SUS301, or other elastic stainless steel with similar performance. Each spring plate 3 comprises an abutting part 32, a bending part 33, a corner part 36, a clamping hook part and an outward expansion guide part 34 which are connected in sequence. The abutting portion 32 is located above the hook portion, and the bending portion 33 extends obliquely.

Further, as shown in fig. 4 and 5, the hook portion is formed with a locking groove 311, and the flange 12 is locked into the locking groove 311 after the assembly of the case 1 and the upper cover 2. The clamping groove 311 is provided with a notch facing downwards, and the width of the clamping groove 311 is gradually increased from bottom to top. The width of the lower part of the clamping groove 311 is smaller than the width of the upper part of the clamping groove 311 and smaller than the wall thickness of the flanging 12, in particular 1/2 of the wall thickness of the flanging 12, and the width of the upper part of the clamping groove 311 is larger than the wall thickness of the flanging 12. The flaring guide 34 extends obliquely from the notch of the clamping groove 311 to guide the flange 12 into the clamping groove 311.

The spring plate 3 is also provided with an inclined clamping part 35 which obliquely extends into the clamping groove 311 from the groove wall of the clamping groove 311, the turnup 12 is provided with a limit groove 121, and the inclined clamping part 35 is inserted into the limit groove 121 after the box body 1 and the upper cover 2 are assembled. The inclined clamping part 35 and the clamping hook part are integrally formed, the inclined clamping part 35 is bent into the clamping groove 311 after being cut from the clamping hook part, a cutting groove 312 is formed in the clamping hook part 35, and one side edge of the inclined clamping part 35 is connected with one side edge of the cutting groove 312.

Before the assembly of the case 1 and the upper cover 2, the abutting portion 32 has an elevation angle of 10 to 30 degrees, and the abutting portion 32 of each spring piece 3 is higher than the sheet metal structural member 17, specifically, the highest point of the spring piece 3 is 0.05mm higher than the sheet metal structural member 17.

The contact parts of the spring plate 3, the box body 1, the sheet metal structural part 17 and the upper cover 2 are not sprayed with paint and powder, and can be regarded as intermetallic contact. After the box body 1 and the upper cover 2 are assembled, the upper end part of the sheet metal structural part 17 is in contact conduction with the inner surface of the upper cover 2, the abutting part 32 is horizontally arranged, the clamping hook part is clamped on the box body 1 and in contact conduction with the box body 1, the abutting part 32 is in contact with the inner surface of the upper cover 2 in a abutting mode and in mutual conduction, the bending part 33 between the clamping hook part and the abutting part 32 is elastically deformed, the tendency that the abutting part 32 abuts against the upper cover 2 is achieved, and the included angle between the bending part 33 and a vertical plane is 15 degrees. Namely, after the box body 1 and the upper cover 2 are locked, the upper cover 2, the elastic sheet 3 and the sheet metal structural part 17 are tightly pressed. The elastic sheet 3 is not easy to loose, the elastic sheet 3, the box body 1 and the upper cover 2 are mutually communicated, electromagnetic energy leakage caused by longer gaps of the upper cover 2 and the box body 1 after screw locking is effectively avoided, and an electromagnetic compatibility function is realized.

Referring to fig. 1, the case 1 has a first side 13, a second side 14, a third side 15 and a fourth side 16, and a sheet metal structural member 17 is vertically disposed in the case 1 and adjacent to the first side 13, and an upper end of the sheet metal structural member 17 is higher than a top end of the case 1. The sheet metal structural part 17 divides the box body 1 into two independent compartments, wherein one compartment is provided with devices required by the photovoltaic inverter, and the other compartment is provided with a data acquisition device and the like to realize a communication function. One or more elastic pieces 3 are respectively disposed on the second side 14, the third side 15 and the fourth side 16, and in this embodiment, the number of elastic pieces 3 on the second side 14, the third side 15 and the fourth side 16 is two. The box 1 is also provided with a plurality of positioning grooves 18 for positioning the elastic sheet 3, the positioning grooves 18 are downwards recessed, and the limiting grooves 121 are positioned below the positioning grooves 18.

The working principle of the photovoltaic inverter housing of this embodiment is as follows:

the elastic sheet 3 is aligned with the positioning groove 18 on the box body 1, the lower side of the clamping hook is contacted with the flange 12 of the box body 1, the elastic sheet 3 is pressed downwards, the clamping hook is spread to be parallel to the flange 12 of the box body 1, meanwhile, the inclined clamping part 35 is extruded and deformed, the elastic sheet 3 is continuously pressed downwards until the highest point of the inclined clamping part 35 is lower than the upper side wall of the limiting groove 121, the inclined clamping part 35 rebounds, the highest point of the inclined clamping part is abutted against the upper side wall of the limiting groove 121, the upper cover 2 is arranged above the box body 1, the inner wall of the upper cover 2 is tightly pressed against the abutting part 32 and the sheet metal structural part 17 after locking, the bending part 33 of the elastic sheet 3 is elastically deformed due to the fact that the elastic sheet metal structural part 3 is higher than the sheet metal structural part 17, the abutting part 32 can always keep a pressed state with the inner wall of the upper cover 2, and electromagnetic energy leakage caused by a long gap after screw locking is effectively avoided.

In order to enable the box body 1 and the upper cover 2 to be electrically connected, the photovoltaic inverter shell of the embodiment forms an effective electromagnetic shielding space, the abutting part 32 of the elastic sheet 3 is tightly contacted with the upper cover 2, the clamping hook part is clamped on the box body 1, electromagnetic shielding performance is enhanced, the electromagnetic compatibility function is achieved, meanwhile, the elastic sheet 3, the box body 1 and the upper cover 2 are tightly contacted with each other, the elastic sheet 3 is not easy to fall off, and the installation is firm.

As used in this specification and in the claims, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus. The term "and/or" as used herein includes any combination of one or more of the associated listed items.

It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly or indirectly fixed or connected to the other feature. Further, the descriptions of the upper, lower, left, right, etc. used in the present utility model are merely with respect to the mutual positional relationship of the constituent elements of the present utility model in the drawings.

The above-described embodiments are provided for illustrating the technical concept and features of the present utility model, and are intended to be preferred embodiments for those skilled in the art to understand the present utility model and implement the same according to the present utility model, not to limit the scope of the present utility model. All equivalent changes or modifications made according to the principles of the present utility model should be construed to be included within the scope of the present utility model.

Claims

1. The utility model provides a photovoltaic inverter casing with electromagnetic compatibility function, includes box and upper cover, the box has open upper open end, upper cover fixed connection in on the box with upper open end seals, its characterized in that, photovoltaic inverter casing still includes a plurality of elastic pieces that can electrically conduct and elastic deformation, every the elastic piece includes trip portion, butt portion and is located trip portion with the kink between the butt portion, the box with after the upper cover assembly, trip portion card is in on the box and with the box contact switches on, the butt portion with the internal surface butt contact of upper cover switches on each other, the kink has the trend that resets so that the butt portion butt pressed the upper cover.

2. The photovoltaic inverter housing of claim 1 wherein the housing has an upwardly extending flange, the hook portion is formed with a slot, and the flange snaps into the slot after the housing and the cover are assembled.

3. The photovoltaic inverter housing of claim 2 wherein the clip groove has a downwardly facing slot, a lower portion of the clip groove having a width less than a width of an upper portion of the clip groove and less than a wall thickness of the flange, the width of the upper portion of the clip groove being greater than the wall thickness of the flange.

4. The photovoltaic inverter housing of claim 3 wherein the spring further has a flared guide extending obliquely from the notch of the clip slot to guide the flange into the clip slot.

5. The photovoltaic inverter housing of claim 2, wherein the spring plate further has an inclined clamping portion extending obliquely from a wall of the clamping groove into the clamping groove, a limit groove is formed in the flange, and the inclined clamping portion is inserted into the limit groove after the box body and the upper cover are assembled.

6. The photovoltaic inverter housing of claim 5, wherein the oblique clamping portion and the hook portion are integrally formed, the oblique clamping portion is bent into the clamping groove after being cut from the hook portion, a cutting groove is formed in the hook portion, and one side edge of the oblique clamping portion is connected with one side edge of the cutting groove.

7. The photovoltaic inverter housing of claim 1 wherein the abutment has an elevation angle of 10 to 30 degrees before the housing and upper cover are assembled; after the box body and the upper cover are assembled, the abutting part is horizontally arranged.

8. The photovoltaic inverter housing of claim 1 wherein the abutment is above the hook and the bend extends obliquely; the elastic sheet is formed by sequentially connecting the abutting part, the bending part, a corner part, the clamping hook part and an outward expansion guide part, and is formed by bending and cutting a metal sheet.

9. The photovoltaic inverter housing of claim 1, wherein the case has a first side, a second side, a third side, and a fourth side, the photovoltaic inverter housing further comprises a sheet metal structural member vertically disposed in the case and adjacent to the first side, an upper end of the sheet metal structural member is higher than a top end of the case, one or more elastic sheets are respectively disposed on the second side, the third side, and the fourth side, and an upper end of the sheet metal structural member is in contact conduction with an inner surface of the upper cover after the case and the upper cover are assembled; before the box body and the upper cover are assembled, the abutting part of each elastic sheet is higher than the sheet metal structural part.

10. The photovoltaic inverter housing of claim 1, wherein the housing is provided with a positioning groove for positioning the spring sheet, and the positioning groove is recessed downward.