Dust cover and photovoltaic inverter

Abstract

The utility model discloses a dust cover and a photovoltaic inverter, and relates to the technical field of photovoltaic inverters. The dustproof cover comprises a shell and an anti-falling screw. A cavity is formed in the shell, and an opening is formed in one side of the cavity. And a mounting frame connected with the shell is arranged at the opening. And a mounting hole is formed in the mounting frame. The anti-falling screw comprises a screw head, an optical axis section and a threaded section which are connected in sequence. The outer diameter of the threaded section is larger than that of the optical axis section. The outer diameter of the threaded section is larger than the size of the mounting hole. And the optical axis section is arranged in the mounting hole. The screw head and the threaded section are located on the two sides of the installation frame respectively. The photovoltaic inverter comprises the dust cover. And the threaded section and the screw head are clamped on the two sides of the mounting frame. And when the screw falls, the threaded section can abut against the mounting frame, so that the screw is prevented from continuously falling, and mounting is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of inverters, and in particular to a dust cover and a photovoltaic inverter. Background Art

[0002] Currently, photovoltaic inverters are mostly used outdoors. When installed outdoors, photovoltaic inverters are often hoisted. When the photovoltaic inverter is hoisted, the AC switch of the inverter faces downward. Existing photovoltaic inverters require dust covers to protect the AC switch.

[0003] The inventor has found that when installing a dust cover on the AC switch of a photovoltaic inverter, the screws are installed from bottom to top. When the screws are not installed in the screw holes, the installer loosens the screws, and the screws are easy to fall off the dust cover. At this time, the screws need to be picked up and reinstalled, which is very inconvenient. Utility Model Content

[0004] The utility model aims to provide a dust cover and a photovoltaic inverter, which can prevent screws from falling off the dust cover.

[0005] The embodiment of the utility model is achieved as follows:

[0006] In a first aspect, the utility model provides a dust cover, comprising:

[0007] A shell, wherein a cavity is provided in the shell and an opening is provided on one side of the cavity, a mounting frame connected to the shell is provided at the opening, and a mounting hole is provided on the mounting frame;

[0008] An anti-slipping screw, the anti-slipping screw includes a screw head, an optical axis segment and a threaded segment connected in sequence, the outer diameter of the threaded segment is larger than the diameter of the optical axis segment, the outer diameter of the threaded segment is larger than the size of the mounting hole, the optical axis segment is arranged in the mounting hole, and the screw head and the threaded segment are respectively located on both sides of the mounting frame.

[0009] In an optional embodiment, the mounting frame includes a main body and an embedded plate, the main body is provided with a groove on a side away from the cavity, the embedded plate is embedded in the groove, the main body is provided with a first mounting hole, the embedded plate is provided with a second mounting hole arranged opposite to the first mounting hole, the diameter of the first mounting hole is greater than or equal to the outer diameter of the threaded segment, and the diameter of the second mounting hole is smaller than the outer diameter of the threaded segment and greater than the diameter of the optical axis segment.

[0010] In an optional embodiment, an inner wall of the second mounting hole is further provided with an arc groove, the arc groove surrounds the second mounting hole and is arranged at intervals, and the outer diameter of the arc groove is greater than the outer diameter of the threaded segment.

[0011] In an optional embodiment, a waterproof gasket is further included, which is covered on the embedded plate. The waterproof gasket is provided with a through hole corresponding to the anti-slip screw, and the diameter of the through hole is larger than the outer diameter of the threaded segment so that the threaded segment can pass through the through hole.

[0012] In an optional embodiment, the waterproof gasket is located in the groove.

[0013] In an optional embodiment, the mounting frame includes a main body and a boss, the main body having a groove on one side away from the cavity, the boss being arranged in the groove and fixedly connected to the main body, the main body having a third mounting hole, the boss having a fourth mounting hole, the third mounting hole and the fourth mounting hole being coaxially arranged, the diameter of the third mounting hole being greater than or equal to the outer diameter of the threaded segment, and the diameter of the fourth mounting hole being smaller than the outer diameter of the threaded segment and greater than the diameter of the optical axis segment.

[0014] In an optional embodiment, a waterproof gasket is further included, which is embedded in the groove. The waterproof gasket is also provided with a clearance hole, and the inner size of the clearance hole is consistent with the outer size of the boss, so that the boss can pass through the clearance hole.

[0015] In an optional embodiment, the body and the boss are integrally formed.

[0016] In an optional embodiment, a rotary switch is further included, and the rotary switch is arranged on the shell. An insulating member is also provided at the connection between the rotary switch and the shell.

[0017] In a second aspect, the utility model provides a photovoltaic inverter, comprising a dust cover as described in any one of the aforementioned embodiments.

[0018] The beneficial effects of the embodiments of the utility model are:

[0019] The dust cover of the utility model comprises a shell and an anti-slip screw. A cavity is provided in the shell and an opening is provided on one side of the cavity. A mounting frame connected to the shell is provided at the opening. A mounting hole is provided on the mounting frame. The anti-slip screw comprises a screw head, an optical axis section and a threaded section which are connected in sequence. The outer diameter of the threaded section is larger than the diameter of the optical axis section. The outer diameter of the threaded section is larger than the size of the mounting hole. The optical axis section is arranged in the mounting hole. The screw head and the threaded section are respectively located on both sides of the mounting frame. The threaded section and the screw head are clamped on both sides of the mounting frame. When the screw falls, the threaded section will abut against the mounting frame, thereby preventing the screw from continuing to fall, and facilitating installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the structure of the dust cover provided in the first embodiment of the utility model;

[0022] Figure 2 A schematic diagram of the explosion structure of the dust cover provided in the first embodiment of the utility model;

[0023] Figure 3 A cross-sectional view of a dust cover provided for the first embodiment of the utility model;

[0024] Figure 4 A schematic diagram of the structure of the second mounting hole provided in the first embodiment of the utility model;

[0025] Figure 5 A schematic diagram of the explosion structure of the dust cover provided in the second embodiment of the utility model;

[0026] Figure 6 A cross-sectional view of a dust cover provided for a second embodiment of the utility model;

[0027] Figure 7 A schematic structural diagram of a photovoltaic inverter provided in the third embodiment of the utility model.

[0028] Icons: 1000-PV inverter; 100-dust cover; 10-housing; 11-mounting frame; 111-body; 1111-first mounting hole; 1112-groove; 1113-third mounting hole; 112-embedded plate; 1121-second mounting hole; 1122-arc groove; 113-boss; 1131-fourth mounting hole; 12-waterproof gasket; 121-through hole; 122-clearance hole; 20-anti-slip screw; 21-screw head; 22-optical axis section; 23-threaded section; 30-rotary switch; 31-insulating member; 200-AC switch. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0033] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] First embodiment

[0036] Please refer to Figure 1-Figure 3The present embodiment provides a dust cover 100, which includes a shell 10 and an anti-slip screw 20. A cavity is provided in the shell 10 and an opening is provided on one side of the cavity. A mounting frame 11 connected to the shell 10 is provided at the opening. A mounting hole is provided on the mounting frame 11. The anti-slip screw 20 includes a screw head 21, an optical axis section 22 and a threaded section 23 connected in sequence. The outer diameter of the threaded section 23 is larger than the diameter of the optical axis section 22. The outer diameter of the threaded section 23 is larger than the size of the mounting hole. The optical axis section 22 is arranged in the mounting hole. The screw head 21 and the threaded section 23 are respectively located on both sides of the mounting frame 11.

[0037] Specifically, the mounting frame 11 includes a body 111 and an embedding plate 112. The body 111 is provided with a groove 1112 on one side away from the cavity. The embedding plate 112 is embedded in the groove 1112. The body 111 is provided with a first mounting hole 1111. The embedding plate 112 is provided with a second mounting hole 1121 arranged opposite to the first mounting hole 1111. The diameter of the first mounting hole 1111 is greater than or equal to the outer diameter of the threaded section 23. The diameter of the second mounting hole 1121 is smaller than the outer diameter of the threaded section 23 and greater than the diameter of the optical axis section 22.

[0038] It is understandable that the anti-drop screw 20 sequentially passes through the first mounting hole 1111 and the second mounting hole 1121. After the threaded section 23 passes through the second mounting hole 1121, the outer diameter of the threaded section 23 is larger than the diameter of the second mounting hole 1121. At this time, the threaded section 23 is stuck outside the second mounting hole 1121 and cannot fall through the second mounting hole 1121.

[0039] It should be noted that, in this embodiment, the material of the embedded plate 112 can be a material with high toughness, so that the second mounting hole 1121 can be slightly deformed, so that the threaded section 23 can pass through the second mounting hole 1121 but cannot pass through in the reverse direction. It can be understood that when the threaded section 23 passes through the second mounting hole 1121 along the mounting direction, it is subject to a large external force, so that it can pass through the second mounting hole 1121; after the threaded section 23 passes through the second mounting hole 1121, it is not subject to external force. At this time, the threaded section 23 is only subject to the gravity of the anti-slip screw 20, and the force is small, so that it cannot pass through the second mounting hole 1121 downward. In this way, the anti-slip screw 20 is stuck on the mounting frame 11 and cannot fall off.

[0040] Please refer to Figure 3 and Figure 4Further, in order to facilitate the threaded section 23 to pass through the second mounting hole 1121 along the installation direction, an arc groove 1122 is also provided on the inner wall of the second mounting hole 1121. The arc groove 1122 surrounds the second mounting hole 1121 and is arranged at intervals. The outer diameter of the arc groove 1122 is greater than the outer diameter of the threaded section 23. It can be understood that the second mounting hole 1121 is a flower-shaped hole, which has an inner diameter and an outer diameter. The outer diameter of the second mounting hole 1121 is greater than the outer diameter of the threaded section 23. The inner diameter of the second mounting hole 1121 is greater than the diameter of the optical axis section 22 and smaller than the outer diameter of the threaded section 23, so that the threaded section 23 can pass through the second mounting hole 1121 along the installation direction through the arc groove 1122. When completely passed through, the thread of the threaded section 23 can abut against the second mounting hole 1121. It should be noted that when the anti-slip screw 20 passes through the second mounting hole 1121, the second mounting hole 1121 is slightly deformed.

[0041] In order to enhance the sealing performance of the dust cover, in this embodiment, the dust cover 100 further includes a waterproof gasket 12. The waterproof gasket 12 is covered on the embedded plate 112. A through hole 121 corresponding to the anti-slip screw 20 is provided on the waterproof gasket 12. The diameter of the through hole 121 is greater than the outer diameter of the threaded section 23, so that the threaded section 23 can pass through the through hole 121. It can be understood that the anti-slip screw 20 passes through the first mounting hole 1111, the second mounting hole 1121 and the through hole 121 in sequence, and the waterproof gasket 12 is clamped on the housing 10 and the mounting plane by the anti-slip screw 20 to achieve a waterproof function.

[0042] In this embodiment, the thickness of the waterproof gasket 12 and the embedded plate 112 is consistent with the depth of the groove 1112. That is, when the waterproof gasket 12 is installed in the groove 1112, the upper surface of the waterproof gasket 12 is flush with the upper surface of the installation frame 11, thereby achieving better sealing performance.

[0043] Further, in order to facilitate the control of the parts in the dust cover from the outside, the dust cover 100 further includes a rotary switch 30. The rotary switch 30 is arranged on the housing 10. An insulating member 31 is also arranged at the connection between the rotary switch 30 and the housing 10. In this embodiment, the insulating member 31 is a rubber ring.

[0044] Second embodiment

[0045] Please refer to Figure 5-Figure 6 This embodiment provides a dust cover 100, which has a substantially similar structure to the dust cover 100 of the first embodiment, except that:

[0046] The mounting frame 11 includes a body 111 and a boss 113. The body 111 is provided with a groove 1112 on one side away from the cavity. The boss 113 is arranged in the groove 1112 and is fixedly connected to the body 111. A third mounting hole 1113 is provided on the body 111. A fourth mounting hole 1131 is provided on the boss 113. The third mounting hole 1113 and the fourth mounting hole 1131 are coaxially arranged. The diameter of the third mounting hole 1113 is greater than or equal to the outer diameter of the threaded section 23. The diameter of the fourth mounting hole 1131 is smaller than the outer diameter of the threaded section 23 and greater than the diameter of the optical axis section 22.

[0047] It is understandable that the anti-drop screw 20 sequentially passes through the third mounting hole 1113 and the fourth mounting hole 1131. After the threaded section 23 passes through the fourth mounting hole 1131, the outer diameter of the threaded section 23 is larger than the diameter of the fourth mounting hole 1131. At this time, the threaded section 23 is stuck outside the fourth mounting hole 1131 and cannot fall through the fourth mounting hole 1131.

[0048] It should be noted that, in this embodiment, the material of the boss 113 can be a material with high toughness, so that the fourth mounting hole 1131 can be slightly deformed, so that the threaded section 23 can pass through the fourth mounting hole 1131 but cannot pass through in the reverse direction. It is understandable that when the threaded section 23 passes through the fourth mounting hole 1131 along the mounting direction, it is subject to a large external force, so that it can pass through the fourth mounting hole 1131; after the threaded section 23 passes through the fourth mounting hole 1131, it is not subject to external force. At this time, the threaded section 23 is only subject to the gravity of the anti-slip screw 20, and the force is small, so that it cannot pass through the fourth mounting hole 1131 downward. In this way, the anti-slip screw 20 is stuck on the mounting frame 11 and cannot fall off.

[0049] Optionally, in this embodiment, the body 111 and the boss 113 are integrally formed. Specifically, the materials of the body 111 and the boss 113 are both plastic and have a certain elasticity so that the fourth mounting hole 1131 can be slightly deformed. In other embodiments, the body 111 and the boss 113 can be connected by bonding or other forms, which is not limited by the present invention.

[0050] In this embodiment, the structure of the waterproof gasket 12 is also different. The waterproof gasket 12 is embedded in the groove 1112. The waterproof gasket 12 is also provided with a clearance hole 122. The inner dimension of the clearance hole 122 is consistent with the outer dimension of the boss 113, so that the boss 113 can pass through the clearance hole 122. It can be understood that the clearance hole 122 of the waterproof gasket 12 is engaged with the boss 113.

[0051] Further, in this embodiment, the thickness of the waterproof gasket 12 is consistent with the depth of the groove 1112. That is, when the waterproof gasket 12 is installed in the groove 1112, the upper surface of the waterproof gasket 12 is flush with the upper surface of the installation frame 11, thereby achieving better sealing performance.

[0052] Third embodiment

[0053] Please refer to Figure 7 This embodiment provides a photovoltaic inverter 1000, which includes the dust cover 100 of the first embodiment and the second embodiment. Specifically, the photovoltaic inverter 1000 is hoisted in an outdoor environment, and includes an AC switch 200 facing downward, and the dust cover 100 covers the AC switch 200. Furthermore, the rotary switch 30 is electrically connected to the AC switch 200 to achieve control of the AC switch 200.

[0054] The dust cover 100 and the photovoltaic inverter 1000 provided in the above three embodiments have the following beneficial effects:

[0055] The dust cover 100 includes a shell 10 and an anti-slip screw 20. A cavity is provided in the shell 10 and an opening is provided on one side of the cavity. A mounting frame 11 connected to the shell 10 is provided at the opening. A mounting hole is provided on the mounting frame 11. The anti-slip screw 20 includes a screw head 21, an optical axis section 22 and a threaded section 23 connected in sequence. The outer diameter of the threaded section 23 is larger than the diameter of the optical axis section 22. The outer diameter of the threaded section 23 is larger than the size of the mounting hole. The optical axis section 22 is arranged in the mounting hole. The screw head 21 and the threaded section 23 are respectively located on both sides of the mounting frame 11. By clamping the threaded section 23 and the screw head 21 on both sides of the mounting frame 11. When the screw falls, the threaded section 23 will abut against the mounting frame 11, thereby preventing the screw from continuing to fall, which is convenient for installation.

[0056] The photovoltaic inverter 1000 includes the above-mentioned dust cover 100, which has the above-mentioned beneficial effects of preventing the screws from falling off and facilitating installation.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dust cover, characterized in that: include: A shell, wherein a cavity is provided in the shell and an opening is provided on one side of the cavity, a mounting frame connected to the shell is provided at the opening, and a mounting hole is provided on the mounting frame; An anti-slipping screw, the anti-slipping screw includes a screw head, an optical axis segment and a threaded segment connected in sequence, the outer diameter of the threaded segment is larger than the diameter of the optical axis segment, the outer diameter of the threaded segment is larger than the size of the mounting hole, the optical axis segment is arranged in the mounting hole, and the screw head and the threaded segment are respectively located on both sides of the mounting frame.

2. The dust cover according to claim 1, characterized in that: The mounting frame includes a main body and an embedded plate, the main body is provided with a groove on one side away from the cavity, the embedded plate is embedded in the groove, the main body is provided with a first mounting hole, the embedded plate is provided with a second mounting hole arranged opposite to the first mounting hole, the diameter of the first mounting hole is greater than or equal to the outer diameter of the threaded segment, and the diameter of the second mounting hole is smaller than the outer diameter of the threaded segment and greater than the diameter of the optical axis segment.

3. The dust cover according to claim 2, characterized in that: The inner wall of the second mounting hole is further provided with an arc groove, which surrounds the second mounting hole and is arranged at intervals, and the outer diameter of the arc groove is greater than the outer diameter of the threaded section.

4. The dust cover according to claim 2, characterized in that: It also includes a waterproof gasket, which is covered on the embedded plate. The waterproof gasket is provided with a through hole corresponding to the anti-slip screw. The diameter of the through hole is larger than the outer diameter of the threaded section so that the threaded section can pass through the through hole.

5. The dust cover according to claim 4, characterized in that: The waterproof gasket is located in the groove.

6. The dust cover according to claim 1, characterized in that: The mounting frame includes a main body and a boss, the main body is provided with a groove on one side away from the cavity, the boss is arranged in the groove and fixedly connected to the main body, the main body is provided with a third mounting hole, the boss is provided with a fourth mounting hole, the third mounting hole and the fourth mounting hole are coaxially arranged, the diameter of the third mounting hole is greater than or equal to the outer diameter of the threaded segment, and the diameter of the fourth mounting hole is smaller than the outer diameter of the threaded segment and greater than the diameter of the optical axis segment.

7. The dust cover according to claim 6, characterized in that: It also includes a waterproof gasket, which is embedded in the groove. The waterproof gasket is also provided with a clearance hole, and the inner size of the clearance hole is consistent with the outer size of the boss, so that the boss can pass through the clearance hole.

8. The dust cover according to claim 6, characterized in that: The body and the boss are integrally formed.

9. The dust cover according to claim 1, characterized in that: It also includes a rotary switch, which is arranged on the shell, and an insulating member is also arranged at the connection between the rotary switch and the shell.

10. A photovoltaic inverter, characterized in that: Comprising the dust cover as described in any one of claims 1-9.

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