Photovoltaic inverter

Abstract

The utility model discloses a photovoltaic inverter which comprises a box body and an upper cover, the box body is provided with an inner cavity with an open upper end, a power component is arranged in the inner cavity, the photovoltaic inverter further comprises an explosion-proof cover, the explosion-proof cover is fixed on the box body to seal the upper end of the inner cavity, the upper cover covers the explosion-proof cover, and the explosion-proof cover is fixed on the box body. The upper cover is fixed on the explosion-proof cover and / or the box body through a first connecting piece, and the first connecting piece is arranged on the lower surface of the upper cover or connected to the lower surface of the upper cover. The photovoltaic inverter provided by the utility model is relatively high in safety performance.

Description

Technical Field

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

[0002] Photovoltaic inverters are the core equipment of solar power generation systems, responsible for converting the direct current (DC) generated by photovoltaic modules into usable alternating current (AC) and adapting them to the grid or load according to system requirements. Based on application scenarios and functions, photovoltaic inverters can be divided into various types, including grid-connected inverters, energy storage inverters, and off-grid inverters.

[0003] Currently, there are more and more grid-connected inverters and energy storage inverters on the market. During the use of these products, short circuits and malfunctions inside the inverter occasionally cause the inverter to explode. At this time, the traditional inverter cover and enclosure design can sometimes be damaged or even burned through by the huge explosive force, resulting in poor safety performance. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a photovoltaic inverter with high safety performance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A photovoltaic inverter includes a housing and a top cover. The housing has an open inner cavity at the top, in which power components are disposed. The photovoltaic inverter also includes an explosion-proof cover, which is fixed to the housing to close the upper end of the inner cavity. The top cover covers the explosion-proof cover and is fixed to the explosion-proof cover and / or the housing by a first connector. The first connector is disposed on or connected to the lower surface of the top cover.

[0007] In a preferred embodiment, an explosion-proof mechanism is provided between the explosion-proof cover and the housing. The explosion-proof mechanism includes a circuit board assembly disposed on the explosion-proof cover and an abutting assembly disposed on the housing. The explosion-proof cover and the housing are in an explosion-proof working state. In the explosion-proof state, the circuit board assembly and the abutting assembly are in tight contact to prevent the explosion-proof cover and the housing from separating.

[0008] In a preferred embodiment, the circuit board assembly includes a circuit board disposed on the explosion-proof cover, a temperature sensor disposed on the circuit board, and a snap-fit ​​component. The abutment assembly includes a connecting plate disposed in the inner cavity of the housing and an abutment component disposed on the connecting plate. In the explosion-proof state, the snap-fit ​​component clamps the abutment component.

[0009] In a preferred embodiment, the latching member includes a first latching member and a second latching member. In the explosion-proof state, the first latching member and the second latching member are close to each other and in tight contact with the abutment member.

[0010] In a preferred embodiment, the heat sink includes a heat dissipation substrate, and the heat dissipation substrate and the heat dissipation cover are fixedly connected.

[0011] In a preferred embodiment, the connecting plate is located in the middle of the inner cavity.

[0012] In a preferred embodiment, the abutment includes a vertical portion and a horizontal portion, the vertical portion extending downward from the horizontal portion, and in the explosion-proof state, the snap-fit ​​element snaps onto the lower surface of the horizontal portion.

[0013] In a preferred embodiment, the circuit board assembly further includes a driving component, which, in the explosion-proof state, drives the first latch and the second latch to move closer to each other.

[0014] In a preferred embodiment, the connector is located on the first side of the explosion-proof cover, the socket is located on the first side of the housing, the second side of the explosion-proof cover has a first stud, the second side of the housing has a second stud, the first stud and the second stud are aligned and connected by fasteners.

[0015] In a preferred embodiment, the upper cover is provided with a sliding groove, and the left and right sides of the explosion-proof cover are detachably installed in the sliding groove.

[0016] The present invention adopts the above solution and has the following advantages compared with the prior art:

[0017] In this utility model of photovoltaic inverter, the explosion-proof cover and the box body are fixedly connected first during assembly, and then the top cover and the explosion-proof cover are connected. The explosion-proof cover between the top cover and the box body can reduce the phenomenon of the cover being blown away or burned through in the event of an explosion, thus protecting the safety of users when using the product, while not affecting the aesthetics. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of a photovoltaic inverter according to an embodiment of the present utility model;

[0020] Figure 2 This is an exploded view of a photovoltaic inverter according to an embodiment of the present invention;

[0021] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0022] Figure 4 for Figure 2 A magnified view of a section at point B in the middle;

[0023] Figure 5 This is a schematic diagram of the combination of the top cover and the explosion-proof cover according to an embodiment of the present utility model;

[0024] Figure 6 This is a front view of the top cover according to an embodiment of the present utility model;

[0025] Figure 7 This is a schematic diagram of the back of the top cover according to an embodiment of the present utility model;

[0026] Figure 8 This is a schematic diagram of the box according to an embodiment of the present utility model.

[0027] in,

[0028] 1. Photovoltaic inverter; 11. Cabinet; 121. Top cover; 1211. Slide rail; 122. Explosion-proof cover;

[0029] 2. Second connector; 21. Insert connector; 22. Insertion hole; 23. Vertical plate;

[0030] 3. First connector;

[0031] 4. Explosion-proof mechanism; 41. Circuit board assembly; 411. Circuit board; 412. Snap-fit ​​component; 4121. First snap-fit ​​component; 4122. Second snap-fit ​​component; 4123. Clamping part; 42. Abutting assembly; 421. Connecting plate; 422. Abutting component; 4221. Vertical part; 4222. Horizontal part. Detailed Implementation

[0032] 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.

[0033] Reference Figures 1 to 8As shown, this embodiment provides a photovoltaic inverter 1, including a housing 11, a top cover 121 and an explosion-proof cover 122. The housing 11 has an open inner cavity at the top, in which power components are disposed. The explosion-proof cover 122 is fixed to the housing 11 to close the upper end of the inner cavity.

[0034] Furthermore, the upper cover 121 covers the explosion-proof cover 122, or the explosion-proof cover 122 is positioned between the upper cover 121 and the housing 11. The explosion-proof cover 122 and the housing 11 are connected by the second connector 2, and the upper cover 121 and the explosion-proof cover 122 are connected by the first connector 3. The first connector 3 is located on or connected to the lower surface of the upper cover 121. In other embodiments, the upper cover can be directly fixedly connected to the housing, or the upper cover can be fixedly connected to both the housing and the explosion-proof cover simultaneously.

[0035] Furthermore, the second connector 2 includes a plug 21 on the explosion-proof cover 122 and a socket 22 on the housing 11. The plug 21 is inserted into the socket 22 to connect the explosion-proof cover 122 and the housing 11. Figure 2 and Figure 5 As shown, the insertion hole 22 is located on a vertical plate 23, and the shape of the connector 21 is L-shaped. When the connector 21 is inserted into the insertion hole 22, at least part of the connector 21 and the vertical plate 23 are in contact. The cooperation between the connector 21 and the insertion hole 22 can reduce the number of screws used and is also more convenient for subsequent disassembly.

[0036] Specifically, the plug-in component 21 is provided on the first side of the explosion-proof cover 122, and the socket 22 is provided on the first side of the enclosure 11. The explosion-proof cover 122 and the enclosure 11 are pre-fixed by the second connector 2. In order to achieve the fixed connection between the explosion-proof cover 122 and the enclosure, the second side of the enclosure 11 is provided with a plurality of second studs, and the second side of the explosion-proof cover 122 is provided with a plurality of first studs. The screws pass through the first studs on the explosion-proof cover 122 and the second studs on the enclosure 11 to fix the explosion-proof cover 122 and the enclosure 11. The first side and the second side of the enclosure 11 are arranged opposite to each other, the first side and the second side of the explosion-proof cover 122 are arranged opposite to each other, and the first side of the enclosure 11 and the first side of the explosion-proof cover 122 are aligned.

[0037] The first connector 3 includes multiple fasteners, which are screws; the upper cover 121 is provided with a slide groove 1211, and the left and right sides of the explosion-proof cover 122 are detachably installed in the slide groove 1211. The slide groove 1211 can serve as a guide and reduces the number of screws used. The left and right sides here refer to... Figure 2The assembly process involves first fixing the explosion-proof cover 122 to the housing 11, then pushing the upper cover 121 to engage the sliding groove 1211 of the upper cover 121 with the left and right sides of the second housing 122, and finally using screws to fix the upper cover 121 and the explosion-proof cover 122 together. More specifically, the left and right sides of the upper cover 121 have press-fit studs extending downward from the lower surface of the upper cover 121, and the left and right sides of the explosion-proof cover 122 have press-fit studs extending upward from the upper surface of the explosion-proof cover 122. Screws pass through the press-fit studs of the explosion-proof cover 122 and the upper cover 121 in sequence to fix the explosion-proof cover 122 and the upper cover 121 together. After assembly, no screws or other fasteners are exposed on the upper surface of the upper cover 121, resulting in a more aesthetically pleasing appearance.

[0038] An explosion-proof mechanism 4 is provided between the explosion-proof cover 122 and the housing 11. The explosion-proof mechanism 4 includes a circuit board assembly 41 and an abutment assembly 42 that cooperate with each other. The circuit board assembly 41 is disposed on the explosion-proof cover 122 and the abutment assembly 42 is disposed on the housing 11. The explosion-proof cover 122 and the housing 11 have an explosion-proof working state. In the explosion-proof state, the circuit board assembly 41 and the abutment assembly 42 are in tight contact.

[0039] Furthermore, the circuit board assembly 41 includes a circuit board 411 mounted on the explosion-proof cover 122, a temperature sensor mounted on the circuit board 411, and a snap-fit ​​connector 412. In this embodiment, to protect the circuit board and related equipment from environmental corrosion, a conformal coating is applied to the circuit board. This conformal coating has excellent high and low temperature resistance; after curing, it forms a transparent protective film with superior insulation, moisture resistance, leakage prevention, shock resistance, dust resistance, corrosion resistance, aging resistance, and corona resistance, thus improving the service life of the circuit board and ensuring safety and reliability. When the temperature sensor detects that the internal temperature of the enclosure 11 reaches 120–150°C, it transmits a signal to the control system, which then controls the snap-fit ​​connector 412 to operate. Figure 3 As shown, the latching component 412 includes a first latching component 4121 and a second latching component 4122 disposed opposite to each other. The first latching component 4121 and the second latching component 4122 are provided with clamping portions 4123. The abutting component 42 includes a connecting plate 421 and an abutting component 422. The connecting plate 421 is elongated and disposed in the inner cavity of the housing 11. More specifically, the connecting plate 421 is disposed in the middle of the inner cavity, and the abutting component 422 is disposed on the connecting plate 421. In the explosion-proof state, the control system controls a driving mechanism to drive the first latching component 4121 and the second latching component 4122 to move closer to each other so that the clamping portion 4123 and the abutting component 422 are pressed into contact. The driving mechanism is disposed inside the latching component 412. The driving mechanism is prior art and will not be described in detail here.

[0040] Reference Figure 4As shown, the abutment 422 is made of metal and has a T-shaped shape. It includes a vertical part 4221 and a horizontal part 4222. The vertical part 4221 extends downward from the horizontal part 4222. In the explosion-proof state, the clamping part 4123 of the latching member 412 is latched onto the lower surface of the horizontal part 4222.

[0041] The photovoltaic inverter in this embodiment consists of a top cover 121, an explosion-proof cover 122, and a housing 11. The explosion-proof cover 122 is disposed between the top cover 121 and the housing 11. The top cover 121 and the explosion-proof cover 122 are connected by a first connector 3, and the explosion-proof cover 122 and the housing 11 are connected by a second connector 2. In other embodiments, the number of covers is not limited to two.

[0042] This embodiment primarily addresses the design of the top cover of traditional inverters. Traditional inverter top covers are mostly single-layer designs with numerous screws, making them prone to being blown off or burned through during an inverter explosion, thus polluting the environment or injuring users. This embodiment features a double-layer cover structure design. This structure can mitigate the risk of the cover being blown off or burned through during an explosion caused by a short circuit or other reasons, protecting the user's safety while using the product. Furthermore, it offers a more aesthetically pleasing appearance (screws and other fasteners are not visible from the front).

[0043] 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.

[0044] 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.

[0045] 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 photovoltaic inverter comprising a cabinet having an inner cavity with an open upper end, and an upper cover, the inner cavity being provided with power components therein, characterized in that, The photovoltaic inverter further comprises an explosion-proof cover fixed to the box to close the upper end of the inner cavity, the upper cover is above the explosion-proof cover, the upper cover is fixed to the explosion-proof cover and / or the box through a first connecting piece, the first connecting piece is arranged on or connected to the lower surface of the upper cover.

2. The photovoltaic inverter of claim 1, wherein, The explosion-proof mechanism is arranged between the explosion-proof cover and the box, and comprises a circuit board assembly arranged on the explosion-proof cover and an abutting assembly arranged on the box; the explosion-proof mechanism has an explosion-proof working state, in which the circuit board assembly and the abutting assembly abut against each other to prevent the explosion-proof cover and the box from being separated.

3. The photovoltaic inverter of claim 2, wherein, The circuit board assembly comprises a circuit board arranged on the explosion-proof cover, a temperature sensor arranged on the circuit board, and a clamping piece, and the abutting assembly comprises a connecting plate arranged in the inner cavity of the box and an abutting piece arranged on the connecting plate, in the explosion-proof state, the clamping piece clamps the abutting piece.

4. The photovoltaic inverter of claim 3, wherein, The clamping piece comprises a first clamping piece and a second clamping piece, in the explosion-proof state, the first clamping piece and the second clamping piece are close to each other and abut against the abutting piece.

5. The photovoltaic inverter of claim 3, wherein, The connecting plate is located in the middle of the inner cavity.

6. The photovoltaic inverter of claim 4, wherein, The abutting piece comprises a vertical part and a horizontal part, the vertical part extends downward from the horizontal part, in the explosion-proof state, the clamping piece clamps the lower surface of the horizontal part.

7. The photovoltaic inverter of claim 4, wherein, The circuit board assembly further comprises a driving assembly, in the explosion-proof state, the driving assembly drives the first clamping piece and the second clamping piece to be close to each other.

8. The photovoltaic inverter of claim 1, wherein, The upper cover is fixed to the explosion-proof cover through a first connecting piece, the first connecting piece comprises a plurality of fasteners; the explosion-proof cover and the box are connected through a second connecting piece, the second connecting piece comprises a plug arranged on the explosion-proof cover and a socket arranged on the box, the plug is inserted into the socket to connect the explosion-proof cover and the box.

9. The photovoltaic inverter of claim 8, wherein, The plug is located at the first side edge of the explosion-proof cover, the socket is located at the first side edge of the box, the second side edge of the explosion-proof cover has a first threaded stud, the second side edge of the box has a second threaded stud, the first threaded stud and the second threaded stud are arranged in alignment, and the first threaded stud and the second threaded stud are connected through fasteners.

10. The photovoltaic inverter of claim 1, wherein, The upper cover is provided with a sliding groove, and the left and right sides of the explosion-proof cover are detachably mounted in the sliding groove.

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