Connecting structure of roof photovoltaic module

Abstract

The utility model discloses a connecting structure of roof photovoltaic modules, which comprises a plurality of photovoltaic modules formed by frames and photovoltaic panels, L-shaped support legs are arranged on the lower surfaces of the frames, clamping grooves capable of accommodating MC4 joints are formed between the L-shaped support legs and the photovoltaic modules, male heads and female heads of the MC4 joints are respectively arranged at the end parts of connecting wires on the back surfaces of two adjacent photovoltaic modules, and the connecting wires are connected with the MC4 joints. The male head and the female head are connected with each other and then are fixedly accommodated in the clamping groove of one photovoltaic module through a connecting piece, and a connecting line of the other photovoltaic module crosses over the joint of the two photovoltaic modules to form an arch-shaped downward dripping bay; the advantages are as follows: the MC4 joint is fixed in the clamping groove between the L-shaped supporting leg and the photovoltaic module through the connecting piece, so that the MC4 joint is prevented from being suspended and loosened, the ultraviolet irradiation is reduced, and the aging is reduced; the connecting line of another adjacent photovoltaic module forms a dripping bay, and the lowest point of the dripping bay is lower than the lower bottom surface of the L-shaped supporting leg, so that water seepage of the MC4 joint can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a connection structure of roof photovoltaic components. Background Art

[0002] The MC4 connectors of the industrial and commercial rooftop photovoltaic bracket installation projects are usually suspended in the air at the joints of two components and under the frame after installation, which can easily lead to loose joints. At the same time, they are greatly affected by natural factors. The MC4 connectors are prone to aging and the sealing surface is prone to water seepage, resulting in MC4 connectors short-circuiting to the ground, oxidation of conductive parts, poor contact and other faults. In actual use, the water seepage problem is often reduced by filling the joints with sealant, but regular inspections are required, and the subsequent removal is also very troublesome, and there is no significant improvement on the problems of aging and loose joints.

[0003] China Patent Publication No.: CN220087249U discloses a photovoltaic module MC4 connector protective shell, including an upper protective shell and a lower protective shell, the upper protective shell and the lower protective shell are connected in a mutually spliced ​​manner, an MC4 connector is placed between the upper protective shell and the lower protective shell, and cable holes are opened on both sides of the upper protective shell and the lower protective shell; the utility model can effectively protect the photovoltaic module MC4 connector, and can monitor the operating status of the MC4 connector and provide a heat dissipation port, while improving the service life of the MC4 connector and ensuring the stable operation of the photovoltaic power station. By adding an MC4 connector protective shell, problems such as water seepage and aging can be solved to a certain extent, but it increases the cost and the difficulty of installation. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the existing MC4 joints of photovoltaic modules are suspended in the air, and the connection parts are prone to water seepage and aging. The addition of a protective shell increases the cost and increases the difficulty of installation. In view of the above problems, a connection structure of roof photovoltaic modules is proposed, including a plurality of photovoltaic modules composed of frames and photovoltaic panels, and the connection lines between each two adjacent photovoltaic modules are electrically connected through MC4 joints, characterized in that: an L-shaped support leg is provided on the lower surface of the frame, and a card slot for accommodating the MC4 joint is formed between the L-shaped support leg and the photovoltaic module, and the male and female heads of the MC4 joint are respectively provided at the ends of the connection lines on the backs of the two adjacent photovoltaic modules, and the MC4 joints between the two adjacent photovoltaic modules are connected and inserted into the card slot of one of the photovoltaic modules and connected to the L-shaped support leg through a connector, and the connection line of the other photovoltaic module passes over the joint of the two photovoltaic modules and is in an arch shape facing downward, and the lowest point of the arch is lower than the lower surface of the frame.

[0005] The technical solution of the utility model fixes the MC4 connector in the slot between the L-shaped support leg and the photovoltaic module by arranging a connecting piece, thereby preventing the MC4 connector from loosening due to long-term suspension. In addition, since it is blocked by the photovoltaic module above, the exposure to ultraviolet rays is reduced, aging is reduced, and the service life of the MC4 connector is extended. At the same time, the connecting line of another adjacent photovoltaic module is arched to form a drip bay, and the lowest point is lower than the lower bottom surface of the L-shaped support leg, which can avoid problems such as short circuit and rust caused by water seepage in the MC4 connector.

[0006] Preferably, the distance between the bottom edge of the L-shaped leg and the back of the photovoltaic module is greater than the thickness of the MC4 connector, and the MC4 connector can be inserted into the slot between the L-shaped leg and the photovoltaic module to reduce ultraviolet radiation, reduce the probability of water seepage, and avoid loosening of the connector.

[0007] Preferably, the bottom edge of the L-shaped leg is provided with a waist hole for passing the connecting piece, so as to facilitate the limiting and fixing of the MC4 connector by the connecting piece.

[0008] Preferably, the connecting piece is a stainless steel wire or rolled strip, which is easy to obtain, simple to use and highly reliable.

[0009] Preferably, the outer side of the MC4 joint is wrapped with a waterproof film to further enhance waterproofing and prevent problems such as short circuit caused by water seepage.

[0010] Preferably, the arch is a dripping bay, and the distance between the lowest point of the arch and the lower surface of the L-shaped support foot is H, H≥0.5cm. Rainwater eventually flows down from the lowest point along the arch. Due to the distance from the lower surface of the frame, it will not penetrate from the joint and cause corrosion of the conductive part of the MC4 joint, resulting in fire and other safety accidents.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The technical solution of the utility model fixes the MC4 connector in the slot between the L-shaped support leg and the photovoltaic module by arranging a connecting piece, thereby preventing the MC4 connector from loosening due to long-term suspension. In addition, since it is blocked by the photovoltaic module above, the exposure to ultraviolet rays is reduced, aging is reduced, and the service life of the MC4 connector is extended. At the same time, the connecting line of another adjacent photovoltaic module is arched to form a drip bay, and the lowest point is lower than the lower bottom surface of the L-shaped support leg, which can avoid problems such as short circuit and rust caused by water seepage in the MC4 connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a partially enlarged schematic diagram of the connection structure of a roof photovoltaic module;

[0014] Figure 2It is a schematic plan view of the connection structure of a roof photovoltaic module;

[0015] Figure 3 It is a schematic elevation diagram of a connection structure of a roof photovoltaic module;

[0016] Among them: 1-photovoltaic module, 2-frame, 3-connecting wire, 4-MC4 connector, 5-connecting parts. DETAILED DESCRIPTION

[0017] The following will be combined with the attached embodiment of the present utility model Figure 1-3 , the technical solutions in the embodiments of the utility model are described in detail. Example 1

[0018] like Figure 1-3 As shown, the utility model is a connection structure of roof photovoltaic components, including a plurality of photovoltaic components 1 composed of frames 2 and photovoltaic panels, and the connection wires 3 between each two adjacent photovoltaic components 1 are electrically connected through MC4 connectors 4.

[0019] The front of the photovoltaic module 1 is a photovoltaic panel, which is fixed by a frame 2. Two connecting wires 3 extend from the back. The ends of the connecting wires 3 of adjacent photovoltaic modules 1 that are close to each other are respectively the male and female heads of the MC4 connector 4. The MC4 connector 4 is an existing product, and the connection process is an existing mature technology. Adjacent photovoltaic modules 1 are electrically connected through the MC4 connector 4.

[0020] L-shaped feet are provided on both sides of the back of the photovoltaic module 1, and the L-shaped feet are connected to the frame 2. The L-shaped feet and the frame 2 are an integral structure. A slot for accommodating the MC4 connector 4 is formed between the L-shaped feet and the photovoltaic module 1. The distance between the bottom edge of the L-shaped foot and the back of the photovoltaic module 1 is greater than the maximum diameter of the MC4 connector 4, and the MC4 connector 4 can be completely placed therein without being affected. The width of the bottom edge of the L-shaped foot must meet the following conditions: after the MC4 connector 4 is fixed, its orthographic projection shall not exceed the outer edge of the L-shaped foot by more than 20%, which can greatly reduce the problem of water seepage and reduce direct ultraviolet rays.

[0021] The bottom edge of the L-shaped support leg is concave to form a waist hole for passing the connecting piece 5. The waist hole is parallel to the side where the L-shaped support leg is located. There are multiple groups of waist holes, two of which are arranged side by side in each group. The connecting piece 5 is a stainless steel wire or rolled strip. One end of the connecting piece 5 is passed through a waist hole, enters the slot, surrounds the outside of the MC4 connector 4, and passes through another parallel waist hole, and then is fixed on the lower surface of the L-shaped support leg to bind the MC4 connector 4 inside the slot.

[0022] At least two connectors 5 are used to fix the male and female ends of the MC4 connector 4 respectively, so that the whole is more stable and not easily exposed from the L-shaped legs, thus avoiding ultraviolet radiation.

[0023] After the male and female heads of the MC4 connector 4 are connected, the whole is fixed in the slot of one of the photovoltaic modules 1. Then, the connecting wires 3 of the photovoltaic module 1 are all located on the lower surface of the photovoltaic module 1, which can avoid water seepage and reduce ultraviolet radiation.

[0024] The connecting line 3 of another adjacent photovoltaic module 1 needs to cross the joint of the two photovoltaic modules 1, and the connecting line 3 is combed to make it arched downward, and the arch is a dripping bay. Since the connecting line 3 is relatively hard, it is not easy to restore to its original shape after combing. The lowest point of the arch is at least 0.5 cm lower than the lower surface of the frame 2, that is, H ≥ 0.5 cm. Most of the connecting line 3 is located below the two photovoltaic modules 1, and only the part at the joint is completely exposed. Even if rainwater falls on the connecting line 3 from the joint, it will gather at the lowest point along the arched dripping bay and then fall down, reducing the probability of water seepage.

[0025] At the same time, when the outside of the MC4 connector is wrapped with a waterproof film and fixed, the waterproof performance will be further enhanced to prevent rainwater from seeping in, causing a short circuit and causing more serious safety hazards.

[0026] A method for using a connection structure of a roof photovoltaic assembly in this embodiment is as follows:

[0027] Place the photovoltaic module 1 at a suitable position on the roof, and adjust it to a suitable angle for fixing. Wrap the male and female heads of the MC4 connector with a waterproof membrane to prevent water seepage. Then connect the connecting wires 3 on the backs of two adjacent photovoltaic modules 1 together through the MC4 connector 4, and then place the MC4 connector 4 as a whole in the slot between the L-shaped support leg and the photovoltaic module 1; pass one end of the stainless steel wire or rolled strip through the waist hole, and wrap it around the upper part of the MC4 connector 4, and then pass it through another parallel waist hole and fix it, tie the MC4 connector 4 to the slot of one of the photovoltaic modules 1, and make the positive projection of the MC4 connector 4 not exceed the frame 2, or not exceed 20%, so as to reduce the problem of water seepage.

[0028] Next, adjust the connecting line 3. For the connecting line 3 that does not need to cross the joints of the two photovoltaic modules 1, it is located on the back of the photovoltaic module 1, and rainwater will not flow along the connecting line 3 into the connection with the MC4 joint 4. For the connecting line 3 that needs to cross the joint, it is bent into an arch shape to form a dripping bay. The distance between the lowest point of the dripping bay and the L-shaped support leg is greater than 0.5 cm. Therefore, rainwater will eventually flow down along the connecting line 3 and will not flow into the gap at the connection with the MC4 joint.

[0029] The above embodiments are only for illustrating the technical idea of ​​the present utility model, and cannot be used to limit the protection scope of the present utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A roof photovoltaic module connection structure, comprising a plurality of photovoltaic modules (1) consisting of frames (2) and photovoltaic panels, wherein the connection wires (3) between each two adjacent photovoltaic modules (1) are electrically connected via MC4 connectors (4), and characterized in that: An L-shaped support leg is provided on the lower surface of the frame (2); a slot for accommodating an MC4 connector (4) is formed between the L-shaped support leg and the photovoltaic module (1); male and female MC4 connectors are provided at the ends of the connection wires (3) on the backs of two adjacent photovoltaic modules (1); the MC4 connector (4) between the two adjacent photovoltaic modules (1) is inserted into the slot of one of the photovoltaic modules (1) after connection and is connected to the L-shaped support leg via a connector (5); the connection wire (3) of the other photovoltaic module (1) passes over the joint between the two photovoltaic modules (1) and faces downward in an arch shape, with the lowest point of the arch being lower than the lower surface of the frame (2).

2. The connection structure of a roof photovoltaic assembly according to claim 1, characterized in that: The distance between the bottom edge of the L-shaped support leg and the back side of the photovoltaic module (1) is greater than the thickness of the MC4 connector (4).

3. The connection structure of a roof photovoltaic assembly according to claim 1, characterized in that: The bottom edge of the L-shaped support leg is provided with a waist hole for passing the connecting piece (5).

4. The connection structure of a roof photovoltaic assembly according to claim 1, characterized in that: The connecting piece (5) is a stainless steel wire or a rolled strip.

5. The connection structure of a roof photovoltaic assembly according to claim 1, characterized in that: The outer side of the MC4 joint (4) is wrapped with a waterproof membrane.

6. The connection structure of a roof photovoltaic assembly according to claim 1, characterized in that: The arch is a dripping bay, and the distance between the lowest point of the arch and the lower surface of the L-shaped support foot is H, and H≥0.5cm.

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