CN214799314U

CN214799314U - Photovoltaic inverter and shell assembly thereof

Info

Publication number: CN214799314U
Application number: CN202121351395.1U
Authority: CN
Inventors: 冯嘉; 宋云辉; 卢盈; 吴生闻
Original assignee: Esway New Energy Technology Jiangsu Co ltd
Current assignee: Elsevier Technology Co ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2021-11-19
Anticipated expiration: 2031-06-17

Abstract

The utility model provides a photovoltaic inverter's casing subassembly, including shell and base, the base has the cavity that is used for installing photovoltaic inverter's electronic components, and the uncovered setting in at least one side of base, shell connect in the base and cover on uncovered, and the material of shell is non-metallic material, and photovoltaic inverter still includes the shielding layer, and the shielding layer is made by conducting material, and the surface or the internal surface of shell, shielding layer ground connection are located to the shielding layer. The shielding layer which is arranged on the outer surface or the inner surface of the shell of the photovoltaic inverter and is made of a conductive material can play a role of electromagnetic shielding, and has excellent electromagnetic compatibility; meanwhile, the shell is made of a non-metal material, particularly can be made of plastic by injection molding, and is low in price, light in texture and attractive in appearance.

Description

Photovoltaic inverter and shell assembly thereof

Technical Field

The utility model belongs to power electronic equipment's electromagnetic compatibility field relates to a photovoltaic inverter and casing assembly thereof.

Background

With the wide spread of electrical equipment, people live with electromagnetic waves, and especially high-power equipment generates more serious electromagnetic waves. Electromagnetic waves generated by electric equipment can interfere with other equipment, and electromagnetic waves generated by other equipment can also interfere with other equipment. The plastic has excellent forming performance, can be used for manufacturing beautiful appearance parts, has lower cost and good corrosion resistance, but cannot shield electromagnetic waves and cannot be used in occasions needing electromagnetic compatibility. At present, metal shells (such as sheet metal and die-cast shells) are generally adopted to shield electromagnetic waves, but the metal has high price and heavy weight, and the outer surface of the metal needs to be protected from corrosion. Alternatively, the shielding case made of plastic material mixed with metal particles can also play a certain shielding role due to the addition of metal particles in the plastic, but the effect is limited.

SUMMERY OF THE UTILITY MODEL

To solve the above problem, an object of the present invention is to provide a housing assembly for a photovoltaic inverter, which can achieve a good electromagnetic shielding effect on the premise of using a non-metallic material.

Another object of the present invention is to provide a photovoltaic inverter, the housing material of which is a non-metallic material and has excellent electromagnetic compatibility.

In order to achieve the above object, the utility model provides a photovoltaic inverter's casing subassembly, including shell and base, the base has the cavity that is used for installing photovoltaic inverter's electronic components, the uncovered setting in at least one side of base, the shell connect in the base cover in uncovered, its characterized in that, the material of shell is non-metallic material, photovoltaic inverter still includes the shielding layer, the shielding layer is made by conducting material, the shielding layer is located the surface or the internal surface of shell, the shielding layer ground connection.

Preferably, the shielding layer is a conductive paint layer coated on the shell, and the conductive paint layer is at least coated on the part of the shell covering the opening.

Preferably, the shell comprises an inner top surface positioned above the opening and an inner side surface surrounding the opening, and the conductive paint layer is covered on the inner top surface and the inner side surface.

Preferably, the shielding layer is grounded through the base, the shielding layer is electrically connected with the base, and the base is grounded.

Preferably, the photovoltaic inverter further includes a plurality of conductive members for connecting the housing and the shielding layer, one end of the conductive member is connected to the housing, and the other end of the conductive member is in contact with the shielding layer.

Preferably, the conductive member is a spring, and the spring has a first end connected to the base and a second end contacting the shielding layer.

Preferably, the elastic sheet further has a bent portion located between the first end portion and the second end portion.

Preferably, the first end portion and the side surface of the base are both provided with a connecting hole, the housing assembly further comprises a connecting member, the base and the connecting member are both made of metal materials, and the conductive member is detachably connected to the base through the connecting member and the connecting hole.

Preferably, the spring plate and the base are made of metal.

Preferably, the housing is injection molded from plastic.

The utility model also provides a photovoltaic inverter, photovoltaic inverter includes as above casing assembly, photovoltaic inverter's electronic components install in the base in the cavity.

The utility model adopts the above scheme, compare prior art and have following advantage:

the utility model discloses a photovoltaic inverter and shell assembly thereof, the shielding layer which is arranged on the outer surface or the inner surface of the shell of the photovoltaic inverter and is made of conductive material can play the role of electromagnetic shielding, and has excellent electromagnetic compatibility; meanwhile, the shell is made of non-metal materials, so that the shell is low in price, light in texture and attractive in appearance.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a housing assembly of a photovoltaic inverter according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the housing, with the shield not shown;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic structural view of the housing showing the shield;

FIG. 5 is a schematic structural view of a spring plate;

fig. 6 is a perspective view of a photovoltaic inverter according to an embodiment of the present invention;

fig. 7 is a cross-sectional view of a photovoltaic inverter according to an embodiment of the present invention;

fig. 8 is a partial enlarged view of fig. 7 at B.

Wherein,

1. a base; 11. opening the mouth; 12. a cavity; 2. a housing; 21. an inner surface; 22. a shielding layer; 23. an inner top surface; 24. an inner side surface; 3. a spring plate; 31. a second end portion; 301. a bending section; 32. a first end portion; 4. connecting holes; 5. a connecting member; 6. and a heat sink.

Detailed Description

The following detailed description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings, enables the advantages and features of the invention to be more readily understood by those skilled in the art. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Furthermore, the technical features mentioned in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

As used herein, the terms "comprises" and "comprising" are intended to be inclusive and mean that there may be additional steps or elements included in a method or apparatus without limitation to such steps or elements. As used herein, the term "and/or" 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 fixed or connected to the other feature or indirectly fixed or connected to the other feature.

As shown in fig. 1, the present embodiment provides a housing assembly of a photovoltaic inverter, which includes a housing 2 and a base 1, wherein the base 1 has a cavity 12 for mounting electronic components of the photovoltaic inverter, and one end of the base 1 is disposed to be open. The housing 2 covers the opening 11, the material of the housing 2 is non-metal material, and in this embodiment, the housing 2 is formed by plastic injection molding.

The housing assembly further comprises a shielding layer 22 provided on the inner surface 21 or the outer surface of the outer shell 2, the shielding layer 22 being made of an electrically conductive material. In the present embodiment, the shielding layer 22 is disposed on the inner surface 21 of the housing 2, i.e. the surface of the housing 2 opposite to the cavity 12 when covering the base 1. The shield layer 22 is formed by spraying a conductive paint containing a metal powder component such as silver or copper. The texture of the formed shield layer 22 is uniform and continuous, and any two points on the shield layer 22 are conductive and at the same potential.

As shown in fig. 2 to 4, the outer shell 2 further includes an inner top surface 23 located above the opening 11 and an inner side surface 24 surrounding the opening 11, the inner top surface 23 is disposed on the inner surface 21 of the outer shell 2, the shape of the inner top surface 23 is similar to the cross-sectional shape of the opening 11, but the area of the inner top surface 23 is smaller than the cross-sectional area of the opening 11, an included angle between the inner top surface 23 and the inner side surface 24 is 90 degrees, and the inner side surface 24 is disposed at the edge of the inner top surface 23. When the inner top surface 23 and the inner side surface 24 cover the opening 11 of the base 1, the inner top surface 23 and the inner side surface 24 are located inside the opening 11. The shielding layer 22 is sprayed on the inner top surface 23 and the inner side surface 24.

As shown in fig. 1, the photovoltaic inverter further includes a plurality of conductive members for connecting the housing 2 and the shielding layer 22, one end of the conductive member is connected to the housing, and the other end is connected to the shielding layer 22. As shown in fig. 5, in the embodiment, the conductive member is an elastic piece 3, the elastic piece 3 has a second end portion 31 and a first end portion 32 connected to each other, and the second end portion 31 includes a bending portion 301 having elasticity to deform and contact with the inner top surface 23 and the inner side surface 24. The first end portion 32 and the side surface of the base 1 are provided with connecting holes 4, the housing assembly further comprises a connecting member 5, and the conductive member is detachably connected to the base 1 through the connecting member 5 and the connecting holes 4. When the housing 2 covers the base 1, the bending portion 301 deforms due to the pressing contact with the inner top surface 23 and the inner side surface 24, and when the shielding layer 22 is electrically connected to the base 1, the bending portion 301 abuts against the inner top surface 23 and the inner side surface 24.

The base 1 and the connecting piece 5 are made of metal materials, the connecting piece 5 is specifically a metal screw, the shielding layer 22 is grounded through the base 1, and when the shielding layer 22 is communicated with the base 1, a shielding body with excellent performance can be formed. In this embodiment, the connection mode of the elastic sheet 3 and the housing 2 is a flexible connection, that is, the elastic sheet 3 is movably connected to the housing 2. The housing 2 is fixedly connected to the base 1 by bolts provided at four corners.

When in use, the conductive paint layer is firstly sprayed on the inner top surface 23 and the inner side surface 24 of the shell 2 to form a uniform shielding layer 22; then, the connecting piece 5 passes through the base 1 and the connecting hole 4 on the first end 32 of the elastic sheet 3, and the elastic sheet 3 is connected with the base 1; the shell 2 is connected with the base 1 in a bolt connection mode, the bending part 301 of the elastic sheet 3 is abutted to the shielding layer 22, and the shielding layer 22 on the shell 2 is communicated with the base to form a shielding body.

As shown in fig. 6 and 7, the present embodiment further provides a photovoltaic inverter, which includes the housing assembly as described above, electronic components of the photovoltaic inverter are disposed in the cavity 12 of the base 1, and the photovoltaic inverter further includes a heat sink 6.

According to the photovoltaic inverter and the shell assembly thereof provided by the embodiment, the shielding layer made of the conductive material is arranged on the outer surface or the inner surface of the shell, and the shielding layer is electrically connected with the base to play a role of electromagnetic shielding, so that the photovoltaic inverter has excellent electromagnetic compatibility; meanwhile, on the premise of not influencing the electromagnetic shielding performance, the shell is made of non-metal materials (especially plastics), so that the weight is light and the carrying is convenient; the price is low, the cost can be reduced, and the competitive advantage is increased; the shell is made by plastic injection molding, and compared with a metal plate shell and a die-casting shell, the shell has more attractive appearance, and different textures can be made on the surface of the shell.

The above embodiments are only for illustrating the technical concept and features of the present invention, and are preferred embodiments, which are intended to enable persons skilled in the art to understand the contents of the present invention and to implement the present invention, and thus, the protection scope of the present invention cannot be limited thereby. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a photovoltaic inverter's casing subassembly, includes shell and base, the base has the cavity that is used for installing photovoltaic inverter's electronic components, the uncovered setting in at least one side of base, the shell connect in the base cover in uncovered, its characterized in that, the material of shell is non-metallic material, photovoltaic inverter still includes the shielding layer, the shielding layer is made by conducting material, the shielding layer is located the surface or the internal surface of shell, shielding layer ground connection.

2. The housing assembly of claim 1, wherein the shielding layer is a conductive paint layer coated on the outer shell, and the conductive paint layer is at least coated on a portion of the outer shell covering the opening.

3. The housing assembly of claim 2, wherein the outer shell includes an inner top surface disposed above the opening and an inner side surface surrounding the opening, and the conductive paint layer is disposed on the inner top surface and the inner side surface.

4. The housing assembly of claim 1 wherein said shield is grounded through said base, said shield being electrically connected to said base, said base being grounded.

5. The housing assembly of claim 4, wherein the photovoltaic inverter further comprises a plurality of conductive members for conducting the housing to the shielding layer, one end of the conductive members being connected to the housing and the other end being in contact with the shielding layer.

6. The housing assembly of claim 5, wherein the conductive member is a spring having a first end connected to the base and a second end in contact with the shielding layer.

7. The housing assembly of claim 6, wherein the spring further has a bend between the first end and the second end; and/or the first end part and the side surface of the base are provided with connecting holes, the shell assembly further comprises a connecting piece, and the conductive piece is detachably connected to the base through the connecting piece and the connecting holes.

8. The housing assembly of claim 6, wherein the spring and the base are made of metal.

9. The housing assembly of claim 1, wherein the outer shell is injection molded from plastic.

10. A photovoltaic inverter, characterized in that it comprises a housing assembly according to any one of claims 1 to 9, the electronic components of the photovoltaic inverter being mounted in the cavity of the base.