Inverter junction box sealing and fastening structure

Abstract

The utility model belongs to the technical field of photovoltaic inverters, and discloses an inverter junction box sealing and fastening structure, which comprises an inverter casing and a junction box connected with the inverter casing, the inverter casing comprises a casing plate serving as a side wall of the inverter casing, and a first fixing part connected with the junction box is integrally formed on the casing plate; the junction box is provided with a second fixing part matched with the first fixing part, and the first fixing part and the second fixing part are matched to achieve connection of the inverter shell and the junction box. The junction box and the inverter shell can be connected in a non-welding mode, the junction box is connected with the sealing component containing cavity formed through the convex hull to be matched with the sealing ring, and the purposes of sealing and water proofing are achieved while the junction box and the inverter shell are assembled in a fastening mode.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic inverter technology, and in particular to a sealing and fastening structure for inverter junction boxes. Background Technology

[0002] The photovoltaic junction box is a crucial component of a photovoltaic power generation system, used to connect photovoltaic cell arrays and inverters, serving a protective and safe connection function. Existing inverters often use a junction box added to the side of the unit to increase the bending space for the AC output cables, making wiring easier for customers. However, the connection between the junction box and the inverter body is via bolts, requiring the search for fixing components during installation, which is inconvenient and may result in weak sealing and waterproofing, posing a safety hazard. Utility Model Content

[0003] This utility model provides a sealing and fastening structure for an inverter junction box.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a sealing and fastening structure for an inverter junction box, comprising an inverter housing and a junction box connected thereto. The inverter housing includes a shell plate serving as its side wall, and the shell plate integrally forms a first fixing component that connects to the junction box. The junction box has a second fixing component that cooperates with the first fixing component. The first fixing component and the second fixing component cooperate to achieve the connection between the inverter housing and the junction box. The first fixing component and the inverter housing are an integral structure, avoiding the loss or retrieval of connecting components during installation, improving installation convenience and efficiency.

[0005] According to this utility model, further, a protrusion is formed on the surface of the shell plate facing the interior of the inverter housing, and the first fixing component is integrally formed on the protrusion.

[0006] According to this utility model, the convex bulge further includes a sealing component receiving chamber, which is an open structure with its opening facing the outer surface of the shell plate. The sealing component is embedded in the sealing component receiving chamber. By providing the convex bulge, a space for placing the sealing ring is formed, facilitating the installation of the sealing ring.

[0007] According to this utility model, the convex bulge is further formed with the first fixing component. The integrated riveting structure reduces the connection between the two components, thus reducing the generation of connection gaps and improving the sealing effect.

[0008] According to this utility model, the first fixing component is further formed by press-riveting at the center of the convex bulge.

[0009] According to this utility model, the thickness of the sealing member is greater than the depth of the sealing member receiving chamber.

[0010] According to this utility model, the cross-sectional shape of the cavity containing the convex bulge and sealing component is circular.

[0011] According to this utility model, the cross-sectional shape of the cavity containing the convex bulge and sealing component is rectangular.

[0012] According to this utility model, the sealing component is a sealing ring.

[0013] According to this utility model, the first fixing component is a stud, and the second fixing component is a screw hole that mates with the first fixing component. The stud passes through the screw hole and is fixed by a nut to achieve a fixed connection between the stud and the screw hole.

[0014] Compared with the prior art, the beneficial effects of this utility model are: this utility model enables the junction box and the inverter housing to be connected in a non-welding manner, and the connection is made with a sealing component formed by a convex bulge to accommodate the cavity and the sealing ring. While the junction box and the inverter housing are tightly assembled, it also achieves the purpose of sealing and waterproofing. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0016] In the attached diagram:

[0017] Figure 1a This is a front view structural diagram of the outer surface of the inverter housing proposed in this utility model;

[0018] Figure 1b This is a partial isometric structural diagram of the outer surface of the inverter housing proposed in this utility model;

[0019] Figure 2a This is a schematic diagram of the sealing ring of this utility model;

[0020] Figure 2b This is a schematic diagram of the AA cross-sectional structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the junction box of this utility model;

[0022] Figure 4a This is a reference diagram showing the formation of the convex bulge of the inverter housing of this utility model;

[0023] Figure 4bThis is a reference diagram for installing the sealing ring of this utility model;

[0024] Figure 4c This is a reference diagram showing the connection between the inverter housing and the junction box of this utility model.

[0025] In the attached diagram,

[0026] 100-Inverter housing, 110-Shell plate, 111-Protrusion, 112-Sealing component receiving chamber, 200-Sealing ring, 300-First fixing component, 400-Junction box, 500-Second fixing component. Detailed Implementation

[0027] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0028] Please see Figures 1a-4c An inverter junction box sealing and fastening structure is disclosed to improve the sealing and waterproofing effect at the connection between the inverter and the junction box. It includes an inverter housing 100, with a shell plate 110 on one side of the housing 100 for mounting a junction box 400. The inner surface of this shell plate 110 has multiple protrusions 111 with sealing component receiving chambers 112. The openings of the sealing component receiving chambers 112 face the outer surface of the shell plate 110. A first fixing member 300 extending outward from the outer surface of the shell plate 110 is integrally formed at the center of each protrusion 111. A second fixing member 500 cooperating with the first fixing member 300 is provided on the surface of the junction box 400. The two fixing members cooperate to connect the inverter housing 100 and the junction box 400. Preferably, the first fixing component 300 is press-formed at the center of the convex bulge 111, which facilitates processing. The integrated structure also facilitates the installation process of the inverter housing 100 and the junction box 400, eliminating the trouble of losing connectors or having to search for connectors during the connection process, thus improving the ease of installation of the inverter housing 100 and the junction box 400. The cross-sectional shape of the convex bulge 111 and the sealing component receiving chamber 112 is preferably circular, which facilitates processing and production. It can also be processed into various shapes such as rectangles, irregular shapes, and triangles according to the mold type.

[0029] Specifically, the first fixing component 300 is a stud, and the second fixing component 500 is a threaded hole that mates with the first fixing component 300. The stud passes through the threaded hole, and a flange nut is installed on the outer periphery of the stud to connect the stud to the threaded hole, thus connecting the inverter housing 100 to the junction box 400. The first fixing component 300 can also be a screw, bolt, or connecting rod, to achieve fixation with the second fixing component 500, wherein the inner diameter of the second fixing component 500 matches the outer diameter of the first fixing component 300.

[0030] In this embodiment, a sealing ring 200 is embedded within the sealing component receiving chamber 112, and the junction box 400 presses the sealing ring 200 against it. Correspondingly, the selection of the sealing ring 200 must match the cross-sectional shape of the sealing component receiving chamber 112. By setting the sealing ring 200, the sealing performance between the junction box 400 and the inverter housing 100 can be improved, enhancing the waterproof effect. The thickness of the sealing ring 200 is slightly greater than the depth of the sealing component receiving chamber 112. Thus, when the junction box 400 and the inverter housing 100 are pressed together, the self-elasticity of the sealing ring 200 ensures a tight fit against the corresponding surface of the junction box 400, further improving the waterproof effect.

[0031] The installation process of this utility model is as follows: a sealing ring 200 is embedded in the sealing component receiving chamber 112, and then the first fixing component 300 integrally formed with the inverter housing 100 is connected with the second fixing component 500 of the junction box. A nut is then fixedly installed on the outer periphery of the first fixing component 300 to fix a set of fixing components. Then, the other first fixing components 300 are connected in sequence to finally achieve the fixed connection between the junction box 400 and the inverter housing 100.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A sealing and fastening structure for an inverter junction box, comprising an inverter housing and a junction box connected thereto, wherein the inverter housing includes a shell plate serving as its sidewall, characterized in that: The shell plate has a protrusion on the surface facing the inside of the inverter housing. The protrusion is integrally formed with a first fixing component that connects to the junction box. The first fixing component extends to the outside of the inverter housing. The convex bulge has a sealing component receiving chamber, which is an open structure with the opening formed on the outer surface of the shell plate, and the sealing component receiving chamber is fitted with a sealing component; The junction box has a second fixing component that cooperates with the first fixing component. The first fixing component and the second fixing component cooperate to connect the inverter housing and the junction box, and the junction box presses against the sealing component.

2. The inverter junction box sealing and fastening structure as described in claim 1, characterized in that: The convex bulge is formed by pressing and riveting to form the first fixing component.

3. The inverter junction box sealing and fastening structure as described in claim 1, characterized in that: The first fixing component is formed by pressing and riveting at the center of the convex bulge.

4. The inverter junction box sealing and fastening structure as described in claim 1, characterized in that: The thickness of the sealing component is greater than the depth of the cavity containing the sealing component.

5. The inverter junction box sealing and fastening structure as described in claim 1, characterized in that: The cross-sectional shape of the cavity containing the convex bulge and sealing component is circular.

6. The inverter junction box sealing and fastening structure as described in claim 1, characterized in that: The cross-sectional shape of the cavity containing the convex bulge and sealing component is rectangular.

7. The inverter junction box sealing and fastening structure as described in claim 1, characterized in that: The sealing component is a sealing ring.

8. The inverter junction box sealing and fastening structure as described in claim 1, characterized in that: The first fixing component is a stud, and the second fixing component is a screw hole that mates with the first fixing component. The stud passes through the screw hole and is fixed by a nut to achieve a fixed connection between the stud and the screw hole.

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