Corner connector, photovoltaic frame and photovoltaic module

Abstract

The utility model relates to the technical field of photovoltaic modules, in particular to a corner connector, a photovoltaic frame and a photovoltaic module. The corner connector is used for solving the problems that an existing corner connector is high in material cost, small in elasticity, free of direct observation view, prone to falling off and the like, and the yield of photovoltaic modules is affected. The corner connector comprises two connecting arms which are perpendicularly intersected and are of the same structure, each connecting arm is provided with two opposite fixing faces, a first cavity and a second cavity which are independent of each other are formed by penetrating through the fixing faces, the first cavity is far away from the joint of the connecting arms, and the second cavity is close to the joint of the connecting arms. And the cross sectional area of the first cavity is firstly increased and then decreased from the top end of the connecting arm to the direction close to the junction. The first cavity is provided with a flaring cavity section and a closing cavity section in the direction from the top end of the connecting arm to the joint, and the length of the closing cavity section is larger than that of the flaring cavity section. And the length of the closing cavity section is 3-4 times that of the expanding cavity section.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic module technology, and in particular to a corner bracket, a photovoltaic frame, and a photovoltaic module. Background Technology

[0002] The existing technology for photovoltaic frame corner brackets has the following problems: First, the material cost is high and the elastic deformation is small; Second, the lack of direct observation of the corner bracket connecting arm and the frame during assembly makes the frame prone to cracking, resulting in material waste and increased production costs; Third, after the corner bracket connecting arm is connected to the frame, there is a small gap between the fixing surface and the profile surface, resulting in low friction and easy detachment, which affects the product yield. Utility Model Content

[0003] The purpose of this utility model is to provide a corner bracket, a photovoltaic frame, and a photovoltaic module to solve the problems of high material cost, reduced flexibility, lack of direct observation field, and easy detachment of existing corner brackets, which affect the yield of photovoltaic modules.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] In a first aspect, this utility model provides a corner bracket, including two perpendicularly intersecting and identical connecting arms. Each connecting arm has two opposing fixed surfaces, through which a first cavity and a second cavity are formed that are independent of each other. The first cavity is far from the junction of the connecting arms, and the second cavity is close to the junction of the connecting arms. The cross-sectional area of ​​the first cavity increases and then decreases from the top of the connecting arm to near the junction.

[0006] As one possible implementation, the first cavity has an expanding oral cavity section and a closing oral cavity section in the direction from the top of the connecting arm to the junction, with the length of the closing oral cavity section being greater than the length of the expanding oral cavity section.

[0007] As one possible implementation, an arc-shaped support plate protruding towards the bulging oral cavity is provided at one end of the retracting oral cavity section and near the bulging oral cavity section.

[0008] As one possible implementation, the length of the retracting oral cavity segment is 3 to 4 times the length of the expanding oral cavity segment; and / or,

[0009] The junction of the expanding and contracting oral cavity sections is the largest cross-section, and the angle between the vertical plane of the largest cross-section and the inner wall of the contracting oral cavity section is 3° to 5°; and / or,

[0010] The angle between the inner walls of the expanding and closing oral cavity segments is 157°–159°; and / or,

[0011] The wall thickness at the intersection of the inner walls of the expanding and closing oral cavity sections is 1.4 mm to 1.8 mm; and / or,

[0012] The expanding oral cavity section has an inverted V-shaped structure with rounded corners at the bottom, and the closing oral cavity section has a V-shaped structure with rounded corners at the bottom, with the radius of the rounded corners being 2mm to 4mm; and / or,

[0013] The second cavity is a right-angled trapezoidal structure with its hypotenuse near the junction.

[0014] As one possible implementation, the solid portion of each of the two fixed surfaces of the connecting arm is provided with serrations.

[0015] As one possible implementation, the inner side of the connecting arm is provided with a protrusion, the protrusion having a beveled surface inclined towards the top.

[0016] As one possible implementation, the vertical distance between the central axis of the protrusion and the inner side of the other connecting arm is 18mm to 20mm; the radius of the protrusion is 3mm to 4mm; and the angle between the chamfered surface and the inner side is 20° to 23.5°.

[0017] As one possible implementation, the saw teeth are inclined saw teeth with a tooth pitch of 0.9mm to 1.1mm.

[0018] Secondly, this utility model also provides a photovoltaic frame, which has a long frame, a short frame and the corner brackets described in the first aspect. The long frame and the short frame are connected end to end to form a rectangular frame. The junction of the long frame and the short frame is fastened by the corner brackets. The two fixing surfaces of the corner brackets are respectively press-fitted to the two side walls opposite to the connecting cavity of the frame. The protrusions on the inner side of the connecting arm are press-fitted to the snap-fit ​​holes on the inner side wall of the frame.

[0019] Thirdly, this utility model also provides a photovoltaic module, including a laminate and the frame described in the second aspect.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] 1. The corner bracket connecting arm provided by this utility model has a first cavity and a second cavity, which can reduce the material used for the corner bracket and reduce the material cost;

[0022] 2. The cross-sectional area of ​​the first cavity on the corner bracket connecting arm provided by this utility model increases and then decreases from the top of the connecting arm to near the junction. That is, the expanding cavity section of the inverted V-shaped structure with rounded bottom corners, the constricting cavity section of the V-shaped structure with rounded bottom corners, and the included angle at the junction of the two cavity sections are in the range of 157° to 159°. This can enhance the overall elastic deformation capability of the corner bracket, reduce the risk of frame cracking during assembly, thereby reducing material waste and production costs.

[0023] 3. The corner bracket connecting arm provided by this utility model has serrations on both fixed surfaces. Firstly, the space between the serrations provides a direct observation field, making the installation distance visible. This allows for a direct assessment of whether the connecting arm is properly engaged with the frame or if it is over-engaged, effectively reducing the risk of frame cracking due to over-engagement, minimizing material waste and production costs. Secondly, the serrations on the fixed surfaces also improve lateral flexible gripping force, increasing friction between the corner bracket and the frame, reducing the risk of corner bracket detachment, and improving the yield rate of photovoltaic module products.

[0024] 4. The corner bracket provided by this utility model has protrusions on its inner side. After the protrusions are engaged with the frame, the friction between the two can be increased, the risk of loosening or falling off can be reduced, and the connection stability and reliability between the corner bracket and the frame can be improved, thereby improving the product yield of photovoltaic modules. Attached Figure Description

[0025] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, 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.

[0026] In the attached diagram:

[0027] Figure 1 This is a schematic diagram of the overall structure of the corner bracket provided in an embodiment of the present utility model;

[0028] Figure 2 for Figure 1 Top view;

[0029] Figure 3 for Figure 1 Side view;

[0030] Figure 4 A perspective view of the corner bracket provided in an embodiment of this utility model.

[0031] Figure label:

[0032] 1a - Connecting arm, 1b - Connecting arm;

[0033] 10-First cavity, 11-Second cavity, 100-Expanding oral cavity section, 101-Contracting oral cavity section, 12-Protrusion, 13-Arc-shaped support plate, 14-Serpentine teeth;

[0034] 2-Border. Detailed Implementation

[0035] To facilitate a clear description of the technical solutions of the embodiments of this utility model, the terms "first" and "second" are used in the embodiments of this utility model to distinguish identical or similar items with essentially the same function and effect. For example, the first threshold and the second threshold are only used to distinguish different thresholds and do not limit their order. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.

[0036] It should be noted that in this utility model, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design scheme described as "exemplary" or "for example" in this utility model should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0037] In this invention, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, "at least one of a, b, or c" can represent: a, b, c, a combination of a and b, a combination of a and c, a combination of b and c, or a, b, and c, where a, b, and c can be single or multiple.

[0038] Firstly, this utility model provides a corner bracket, the material of which can be a high-temperature resistant insulating layer material, specifically PA66 as the main material, with the addition of various auxiliary materials to enhance the corner bracket's elasticity, mechanical strength, and toughness. The corner bracket can be formed using injection molding. The corner bracket provided by this utility model has advantages such as high elasticity, excellent toughness, wear resistance, oil resistance, and heat resistance.

[0039] See Figures 1 to 3The corner bracket provided by this utility model includes two perpendicularly intersecting and structurally identical connecting arms 1a and 1b. Each connecting arm has two opposing fixed surfaces, through which independent first cavities 10 and second cavities 11 are formed. The first cavity 10 is far from the junction of the connecting arms, and the second cavity 11 is close to the junction of the connecting arms. The cross-sectional area of ​​the first cavity 10 increases and then decreases from the top of the connecting arm to near the junction. The corner bracket connecting arms having the first cavity 10 and the second cavity 11 reduces the material used in the corner bracket, thus lowering material costs. The cross-sectional area of ​​the first cavity 10 on the corner bracket connecting arm increases and then decreases from the top of the connecting arm to near the junction, i.e., the expanding oral section 100 with a rounded bottom corner and the constricting oral section 101 with a rounded bottom corner and a V-shaped structure, enhances the overall elastic deformation capability of the corner bracket, reduces the risk of frame 2 cracking during assembly, thereby reducing material waste and lowering production costs. In addition, the inverted V-shaped structure of the bottom wall with rounded corners makes the top of the connecting arm curved, and the size gradually decreases as it gets closer to the top. When the corner bracket is engaged with the frame 2, it can play a guiding role, thus making it easier to assemble the corner bracket with the frame 2.

[0040] The length of the constricting cavity section 101 is greater than the length of the expanding cavity section 100. As an example, the length of the constricting cavity section 101 is 3 to 4 times the length of the expanding cavity section 100. For instance, the length of the expanding cavity section 100 is 7.5 mm, the length of the constricting cavity section 101 is 24.5 mm, and the overall length of the first cavity 10 is 32 mm. It needs further explanation that the connecting arm corresponding to the expanding cavity section 100 mainly serves a guiding function, while the connecting arm corresponding to the constricting cavity section 101 is the effective assembly section, meaning it mainly engages with the cavity of the frame 2 through this part. Therefore, through the above dimensional design, on the one hand, the guiding function during assembly can be ensured, and on the other hand, the stable engagement of the connecting arm with the frame 2 can be ensured, thereby optimizing the engagement stability between the corner bracket and the frame 2.

[0041] An arc-shaped support plate protruding towards the flaring section is provided at one end of the constricting section and near the flaring section. The arc-shaped support plate can be integrally molded and is made of the same material as the corner bracket. The arc-shaped support plate can improve the overall elastic deformation capability of the corner bracket, and the cover can also strengthen the connecting arm.

[0042] The junction of the expanding oral cavity section 100 and the closing oral cavity section 101 is the largest cross-section. The angle between the vertical plane of the largest cross-section and the inner wall of the closing oral cavity section 101 is 3° to 5°, for example, 3°, 4° or 5°. With this configuration, the wall thickness of the connecting arm corresponding to the closing oral cavity section 101 gradually increases from the opening end to the closing end, which can take into account both the strength of the connection between the connecting arm and the frame 2 and the elastic deformation of the connecting arm.

[0043] The angle between the inner walls of the expanding oral cavity section 100 and the closing oral cavity section 101 is 157° to 159°. For example, the angle can be 157°, 158°, or 159°. This setting can ensure the elastic deformation of the connecting arm to the greatest extent.

[0044] The wall thickness at the intersection of the inner walls of the expanding oral cavity section 100 and the closing oral cavity section 101 is 1.4mm to 1.8mm, for example, specifically 1.4mm, 1.5mm, 1.6mm, 1.7mm, or 1.8mm. The wall thickness of each part of the connecting arm corresponding to the expanding oral cavity section 100 can be equal to the wall thickness at the intersection. The wall thickness of the connecting arm corresponding to the closing oral cavity section 101 can start from the wall thickness at the intersection and gradually increase. The height of the connecting arm, excluding the expanding oral cavity section 100, is 10±0.5mm.

[0045] The expanding oral cavity section 100 has an inverted V-shaped structure with rounded corners on the bottom wall, and the closing oral cavity section 101 has a V-shaped structure with rounded corners on the bottom wall. The radius of the rounded corners is 2mm to 4mm. For example, the radius can be 2mm, 3mm or 4mm.

[0046] The second cavity 11 is a right-angled trapezoidal structure with its hypotenuse near the junction. In this case, the upper side of the right-angled trapezoidal cavity is 4.5mm, the lower side is 7mm, and the height is 3mm. Of course, the second cavity 11 can also be other structures, such as any structure like a square, rectangle, triangle, polygon, or irregular shape, without any specific limitation here.

[0047] Each of the two fixed surfaces of each connecting arm is provided with serrations 12. As an example, the serrated segments cover part of the fixed surface. For example, when the total length of the connecting arm is 38mm, the total length of the serrated segments is close to 38mm. Or, for example, when the total length of the connecting arm is 38mm, the total length of the serrated segments is 12mm, and the serrated segments are located near the junction of the two connecting arms. On the one hand, the space between the serrations can be used as a direct observation field, making the installation distance visible, thus allowing for a direct judgment of whether the connecting arm and the frame 2 are properly engaged or over-engaged, effectively reducing the risk of frame 2 cracking due to over-engagement, reducing material waste and production costs. On the other hand, the serrations on the fixed surface solid part can also improve the lateral flexible grip, increase the friction between the corner bracket and the frame 2, reduce the risk of corner bracket detachment, and improve the yield of photovoltaic module products.

[0048] The inner surface of the connecting arm is provided with a protrusion 13, which has a beveled surface sloping towards the top. The vertical distance from the central axis of the protrusion 13 to the inner surface of the other connecting arm can be 18mm to 20mm, for example, 18mm, 19mm, or 20mm. The radius of the protrusion 13 can be 3mm to 4mm, for example, 3mm, 3.5mm, or 4mm. The angle between the beveled surface and the inner surface is 20° to 23.5°. After the protrusion 13 is engaged with the frame 2, it can increase the friction between the two, reduce the risk of loosening or falling off, improve the connection stability and reliability between the corner bracket and the frame 2, and thus improve the product yield of the photovoltaic module.

[0049] All the above saw teeth are inclined saw teeth with a tooth pitch of 0.9mm to 1.1mm, for example, 0.9mm, 1.0mm, and 1.1mm.

[0050] In practical applications, the serrations on the solid parts of the two fixed surfaces can extend from the location of the protrusion 13 toward the junction of the two connecting arms, approaching but not actually reaching the junction.

[0051] The dimensions of the corner brackets provided in this embodiment of the present invention, which were not mentioned above, are described below:

[0052] The total length of the connecting arm is 43mm, the width of the connecting arm constricting section 101 is 4.7±1mm, the minimum width of the connecting arm expanding section 10±1 is 11mm, and the height of the connecting arm is 10mm.

[0053] The maximum distance between the inner walls of the first cavity 10 is 12.7 mm, and the minimum distance is 3 mm.

[0054] Secondly, this embodiment of the invention also provides a photovoltaic frame 2, see [link to previous document]. Figure 4 The photovoltaic frame 2 has a long frame 2, a short frame 2 and the corner brackets described in the first aspect. The long frame 2 and the short frame 2 are connected end to end to form a rectangular frame. The junction of the long frame 2 and the short frame 2 is fastened by the corner brackets. The two fixing surfaces of the corner brackets are respectively press-fitted to the two side walls opposite to the connecting cavity of the frame 2. The protrusions 13 on the inner side of the connecting arm are press-fitted to the snap-fit ​​holes on the inner side wall of the frame 2.

[0055] Thirdly, this utility model embodiment also provides a photovoltaic module, including a laminate and the frame described in the second aspect.

[0056] Although the present invention has been described herein in conjunction with various embodiments, those skilled in the art will understand and implement other variations of the disclosed embodiments by reviewing the accompanying drawings, the disclosure, and the drawings themselves. In this specification, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple components. A single processor or other unit can implement several functions listed in the specification. While certain measures are described in different embodiments, this does not mean that these measures cannot be combined to produce good results.

[0057] Although the present invention has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of the present invention. Accordingly, this specification and drawings are merely illustrative of the present invention and are to be considered as covering any and all modifications, variations, combinations, or equivalents within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and modifications of the present invention fall within the scope of the present invention and its equivalents, the present invention also intends to include such modifications and modifications.

Claims

1. A corner code, characterized in that, The device includes two perpendicularly intersecting connecting arms with identical structures. Each connecting arm has two opposing fixed surfaces, through which a first cavity and a second cavity are formed, independent of each other. The first cavity is far from the junction of the connecting arms, and the second cavity is close to the junction of the connecting arms. The cross-sectional area of ​​the first cavity increases and then decreases from the top of the connecting arm to near the junction. The first cavity has an expanding oral cavity section and a constricting oral cavity section in the direction from the top of the connecting arm to the junction, and the length of the constricting oral cavity section is greater than the length of the expanding oral cavity section. An arc-shaped support plate protruding towards the bulging oral cavity is provided at one end of the oral cavity retracting section and near the oral cavity expanding section.

2. The corner code according to claim 1, characterized in that, The length of the retracting oral cavity segment is 3 to 4 times the length of the expanding oral cavity segment; and / or, The junction of the expanding and contracting oral cavity sections is the largest cross-section, and the angle between the vertical plane of the largest cross-section and the inner wall of the contracting oral cavity section is 3° to 5°; and / or, The angle between the inner walls of the expanding and closing oral cavity segments is 157°–159°; and / or, The wall thickness at the intersection of the inner walls of the expanding and closing oral cavity sections is 1.4 mm to 1.8 mm; and / or, The expanding oral cavity section has an inverted V-shaped structure with rounded corners at the bottom, and the closing oral cavity section has a V-shaped structure with rounded corners at the bottom, with the radius of the rounded corners ranging from 2 mm to 4 mm; and / or, The second cavity is a right-angled trapezoidal structure with its hypotenuse near the junction.

3. The corner code according to claim 1, characterized in that, Each of the two fixed surfaces of the connecting arm is provided with serrations.

4. The corner code according to claim 2, characterized in that, The inner side of the connecting arm is provided with a protrusion, and the protrusion has a beveled surface that slopes towards the top.

5. The corner code according to claim 4, characterized in that, The vertical distance between the central axis of the protrusion and the inner side of the other connecting arm is 18mm to 20mm; the radius of the protrusion is 3mm to 4mm; and the angle between the beveled surface and the inner side is 20° to 23.5°.

6. The corner code according to claim 3, characterized in that, The saw teeth are inclined and the tooth pitch is 0.9 mm to 1.1 mm.

7. A photovoltaic frame, characterized in that, The photovoltaic frame has a long frame, a short frame, and a corner bracket as described in any one of claims 1 to 6. The long frame and the short frame are connected end to end to form a rectangular frame. The junction of the long frame and the short frame is fastened by the corner bracket. The two fixing surfaces of the corner bracket are respectively press-fitted to the two side walls opposite to the connecting cavity of the frame. The protrusion on the inner side of the connecting arm is press-fitted to the snap-fit ​​hole on the inner side wall of the frame.

8. A photovoltaic module, characterized in that, It includes the laminate and the frame as described in claim 7.

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