Switch module of photovoltaic inverter and photovoltaic inverter

Abstract

The utility model discloses a switch module of a photovoltaic inverter and the photovoltaic inverter, the switch module comprises a switch and a switch support frame, the switch support frame comprises a first connecting part, the switch is fixed on the first connecting part or abuts against the first connecting part, and the switch is fixed on the first connecting part. The switch supporting frame further comprises a plurality of second connecting parts which are configured to be connected to different connecting points of a box body of the photovoltaic inverter and are arranged at intervals. The switch provided by the utility model has good stability and is not easy to break.

Description

Technical Field

[0001] This utility model belongs to the field of power electronics technology, specifically relating to a switching module for a photovoltaic inverter and a photovoltaic inverter. Background Technology

[0002] The switches in a photovoltaic inverter play multiple roles in a photovoltaic system, mainly including protecting the system, improving efficiency and reliability.

[0003] Currently, photovoltaic inverter switches are primarily secured to the enclosure using nuts. When the inverter power is low and the switch is small, securing it with a single plastic nut poses no risk. However, as power increases, the number of switch layers increases, along with the switch's size and weight, increasing the risk of breakage. For example, the switch inside a high-power inverter can weigh up to 1 kg. In use, the photovoltaic inverter is typically suspended, with the switch essentially suspended inside the enclosure. The entire weight of the switch is supported by the nut at the front, making the switch "top-heavy" within the enclosure. During vibration and drop tests, because the switch has no other support, the impact exerts a tremendous force on the nut and the enclosure's sheet metal, potentially causing the switch to break or the sheet metal enclosure to deform.

[0004] Based on the above, some companies will use custom switches, such as adding multiple horizontal ribs to the switch to support the entire switch. Although the reliability is guaranteed, this increases the cost and cannot achieve cost reduction and efficiency improvement. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a switching module and a photovoltaic inverter, and the switch inside the housing is not easily damaged.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A switching module for a photovoltaic inverter includes a switch and a switch support frame. The switch support frame includes a first connecting portion, and the switch is fixed to or abuts against the first connecting portion. The switch support frame also includes a plurality of spaced second connecting portions configured to connect to different connection points on the housing of the photovoltaic inverter.

[0008] In a preferred embodiment, a receiving space for accommodating the switch is formed between the first connecting portion and the second connecting portion, and the first connecting portion and the switch are in abutting contact.

[0009] In a preferred embodiment, the switch support has a body with a through hole through which the switch passes.

[0010] In a preferred embodiment, the switch support frame further includes a support foot extending downward from the body, the support foot and the second connecting portion being integrally formed.

[0011] In a preferred embodiment, the support foot has a plurality of limiting protrusions, which abut against the switch.

[0012] In a preferred embodiment, the second connecting portion and the side wall of the housing are fixedly connected by a plurality of fasteners.

[0013] In a preferred embodiment, the second connecting portion is provided with a mounting hole, through which the fastener passes to fix the switch support frame and the housing.

[0014] In a preferred embodiment, the switch support frame is made of iron.

[0015] In a preferred embodiment, the switch has a first switch portion and a second switch portion, the first switch portion having a first abutting surface that abuts against the switch support frame, and the second switch portion having a second abutting surface that abuts against the side wall of the housing.

[0016] This utility model also includes the following technical solutions:

[0017] A photovoltaic inverter includes a housing, and the photovoltaic inverter further includes a switching module disposed within the housing.

[0018] In this article, the up and down directions refer to the direction closer to the rotary handle when the photovoltaic inverter is wall-mounted, which is "down" and the direction farther away from the rotary handle, which is "up".

[0019] The present invention adopts the above solution and has the following advantages compared with the prior art:

[0020] In this utility model, at least some switches are located between the first connecting part and the second connecting part. The switch support frame is fixedly connected to the housing through the second connecting part. The first connecting part and the switch are in close contact. That is, the switch support frame bears part of the weight of the switch, distributing the weight of the switch onto the switch support frame, thus preventing the switch from breaking due to vibration. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1This is a schematic diagram of a photovoltaic inverter according to an embodiment of the present invention;

[0023] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0024] Figure 3 This is another schematic diagram of a photovoltaic inverter according to an embodiment of the present invention;

[0025] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0026] Figure 5 This is a perspective view of a switch support frame according to an embodiment of the present utility model;

[0027] Figure 6 This is another perspective view of the switch support frame according to an embodiment of the present utility model;

[0028] Figure 7 This is a schematic diagram of a switch according to an embodiment of the present invention.

[0029] in,

[0030] 100. Photovoltaic inverter; 101. Housing; 102. Internal cavity;

[0031] 1. Switch; 11. First switch section; 12. Second switch section;

[0032] 2. Switch support frame; 21. Body; 211. Through hole; 22. Support foot; 221. Limiting protrusion; 222. Mounting hole; 23. First connecting part; 24. Second connecting part; 25. Extension part;

[0033] 3. Fixing components; 31. Nut; 32. Stud;

[0034] 4. Rotary handle; 5. Fasteners. Detailed Implementation

[0035] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted that the description of these embodiments is for the purpose of aiding understanding the present invention, but does not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] Reference Figures 1 to 7 As shown, this embodiment provides a photovoltaic inverter 100, which includes a housing 101, a rotary handle 4 disposed outside the housing 101, and a switch module disposed inside the housing 101.

[0037] Furthermore, the switch module includes a switch 1 and a switch support frame 2. The switch 1 is a power switch that can disconnect the connection between the photovoltaic panel and the inverter, causing the inverter to lose the DC power provided by the photovoltaic panel. The switch support frame 2 is a component specifically designed to fix and support the switch 1, ensuring that the switch 1 remains stable during operation and is not affected by external vibrations.

[0038] Furthermore, the switch support frame 2 has a first connecting portion 23 and a second connecting portion 24. The switch is fixed to or abuts against the first connecting portion 23. Multiple second connecting portions 24 are spaced apart and configured to connect to different connection points on the housing 101 of the photovoltaic inverter 100. A receiving space for accommodating the switch 1 is formed between the first connecting portion 23 and the second connecting portion 24. The first connecting portion 23 and the switch 1 are in tight contact, and the second connecting portion 24 is fixedly connected to the housing 101.

[0039] Furthermore, the switch support frame 2 has a body 21, support legs 22 extending downward from the body 21, and an extension 25 extending upward from the body 21. The second connecting part 24 and the support legs 22 are integrally formed. The body 21 has four interconnected long sides and a through hole 211 for the switch 1 to pass through. The through hole 211 is rectangular in shape, and its size is set according to the size of the switch, specifically according to the requirements of different manufacturers. The second connecting part 24 is fixedly connected to the side wall of the housing 101. Specifically, the second connecting part 24 and the side wall of the housing 101 are fixedly connected by multiple fasteners 5. More specifically, the second connecting part 24 has mounting holes 222, through which the fasteners 5 pass to fix the switch support frame 2 and the housing 101. The fasteners 5 are screws. The support legs 22 of this application are located on the left and right sides of the body 21.

[0040] There are multiple support feet 22, see reference. Figure 5 and Figure 6 As shown, there are three support feet 22. Two support feet are provided on one side of the main body 21, and one support foot is provided on the other side. Each support foot 22 has multiple limiting protrusions 221 to shorten the gap between the support foot 22 and the switch 1. The limiting protrusions 221 and the switch 1 are in tight contact. By providing limiting protrusions 221 on the support feet 22, the switch 1 is bound inside the switch support frame 2, preventing slight shaking and ensuring that the switch 1 will not be displaced or loosened during operation. Specifically, in this embodiment, two smaller support feet have limiting protrusions, while the larger support feet do not have limiting protrusions due to their larger support surface. In other embodiments, limiting protrusions can be provided on all support feet, that is, there is no limit to the number of support feet or limiting protrusions used, and the setting can be made according to the actual situation.

[0041] More specifically, switch 1 has a first switch portion 11 and a second switch portion 12, which are integrally formed. The first switch portion 11 is located above the second switch portion 12, and the length of the first switch portion 11 is greater than that of the second switch portion 12. The second switch portion 12 is located within the aforementioned accommodating space. The size of the through hole 211 is designed mainly based on the length and width of the second switch portion. For ease of assembly, the size of the through hole of the switch support frame is slightly larger than the outer contour of the second switch portion. During installation, the second switch portion 12 passes through the through hole 211 and is fixedly connected to the side wall of the housing 101. After installation, switch 1 is suspended inside the housing 101, with the extension 25 abutting against the outer contour of the first switch portion 11, the support leg 22 abutting against the outer contour of the second switch portion 12, and the body 21 in tight contact with the lower surface of the first switch portion 11. The switch support frame 2 distributes part of the weight of switch 1, avoiding a "top-heavy" situation and effectively protecting the switch from damage when subjected to vibration.

[0042] The switch 1 is fixed to the side wall of the housing 101 by the fixing component 3. The fixing component 3 includes a stud 32 and a nut 31. The stud 32 and the second switch part 12 are integrally set. A hole is opened on the side wall of the housing 101. After the stud 32 passes through the hole, the nut 31 locks in to fix the switch 1 to the housing 101.

[0043] The first switch part 11 has a first contact surface that abuts against the switch support frame 2, and the second switch part 12 has a second contact surface that abuts against the side wall of the housing 101. The first and second contact surfaces are parallel to each other. More specifically, the first contact surface refers to the lower surface of the first switch part 11, and the second contact surface refers to the lower surface of the second switch part 11. The first switch part 11 applies pressure to the switch support frame 2, distributing the weight of the switch 1 onto the switch support frame 2, thereby enhancing the stability of the switch 1. The switch support frame 2 is made of iron, which has high mechanical strength and durability, making it suitable for long-term use.

[0044] In this embodiment, during the assembly of the photovoltaic inverter, the second switch part 12 of switch 1 is first passed through the through hole 211 of switch support frame 2, and the body 21 of switch support frame 2 and the first switch part 11 are in close contact. The support foot 22 and the side wall of the second switch part 12 are also in close contact, making assembly relatively convenient. Next, the stud 32 is passed through the hole on the housing 101 and the switch 1 is locked onto the housing 101 by the nut 31, or in other words, the switch 1 and the housing 101 are fixedly connected. Then, the fastener 5 is used to fix the switch support frame 2 and the side wall of the housing 101. Finally, the rotating handle 4 is assembled onto the stud 32. In this embodiment, the existing commercially available switch 1 is clamped onto the switch support frame 2, and the weight of the switch 1 is mainly distributed on the switch support frame 2. The nut 31 assists in fixing, which perfectly solves the problem of switch breakage under stress during vibration and drop, and also prevents the housing 101 from deforming due to local stress.

[0045] This embodiment solves the problem of switch vibration breakage by using a single switch support frame, distributing the weight of switch 1 onto the support frame 2 and protecting switch 1 from damage. Furthermore, it eliminates the need for custom switches; existing switches can be modified to their dimensions for direct use, reducing operating costs. In addition, by ensuring the stability and safety of the internal switches of the photovoltaic inverter, the inverter's performance is improved, its lifespan is extended, and it can operate stably in various complex environments.

[0046] As indicated in this specification and claims, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, and these steps and elements do not constitute an exclusive list; the method or apparatus may also include other steps or elements. The term "and / or" as used herein includes any combination of one or more of the associated listed items.

[0047] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or it can be indirectly fixed or connected to the other feature. Furthermore, the descriptions of "upper," "lower," "left," and "right" used in this utility model are only relative to the relative positional relationships of the various components of this utility model in the accompanying drawings.

[0048] The above embodiments are only for illustrating the technical concept and features of this utility model, and are preferred embodiments. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly, and should not be construed as limiting the protection scope of this utility model. All equivalent transformations or modifications made based on the principles of this utility model should be covered within the protection scope of this utility model.

Claims

1. A switch module of a photovoltaic inverter, characterized in that, The switch support frame comprises a first connecting part, the switch is fixed on or abuts against the first connecting part, and the switch support frame further comprises a plurality of second connecting parts which are arranged at intervals and are configured to be connected to different connecting points of a box of the photovoltaic inverter.

2. The switch module of claim 1, wherein, An accommodation space for accommodating the switch is formed between the first connecting part and the second connecting parts, and the first connecting part and the switch are in abutting contact.

3. The switch module of claim 2, wherein, The switch support frame has a body, and a through hole is arranged on the body for the switch to pass through.

4. The switch module of claim 3, wherein, The switch support frame further comprises a support leg which extends downward from the body and is integrally arranged with the second connecting parts.

5. The switch module of claim 4, wherein, The support leg has a plurality of limiting protrusions which are in abutting contact with the switch.

6. The switch module of claim 4, wherein, The second connecting parts and the side wall of the box are fixedly connected by a plurality of fasteners.

7. The switch module of claim 6, wherein, Mounting holes are arranged on the second connecting parts, and the fasteners pass through the mounting holes to fixedly connect the switch support frame and the box.

8. The switch module of claim 7, wherein, The material of the switch support frame is iron.

9. The switch module of claim 7, wherein, The switch has a first switch part and a second switch part, the first switch part has a first abutting surface which is in abutting contact with the switch support frame, and the second switch part has a second abutting surface which is in abutting contact with the side wall of the box.

10. A photovoltaic inverter comprising a cabinet, characterized in that The photovoltaic inverter further comprises the switch module as claimed in any one of claims 1 to 9, and the switch module is arranged in the box.

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