Frameless solar PVT assembly

Abstract

The utility model belongs to the technical field of solar photovoltaic photo-thermal comprehensive utilization, and discloses a frameless solar PVT assembly which is mainly composed of a transparent surface layer, a photovoltaic cell layer, a photovoltaic backboard layer, a heat exchange layer, purlines, a fixing clamp and a junction box, bonding layers are arranged between the layers, the purlines and the fixing clamp are installed after the layers of the PVT assembly are stacked, and finally a battery box is installed. And all layers of the PVT assembly are fixed through the purlines and the fixing clamps. According to the utility model, frameless application of the PVT assembly is realized, accumulated snow on the surface of the PVT assembly in winter is effectively reduced, the structure is simple, and the manufacturing cost is low. The PVT assembly provided by the utility model has important significance in promoting the application of the PVT assembly in high and cold snowfall areas.

Description

Technical Field

[0001] The utility model belongs to the technical field of comprehensive utilization of solar photovoltaic and thermal energy, and specifically relates to a frameless solar PVT component. Background Art

[0002] As the most widely used renewable energy, the development and utilization of solar energy and the improvement of solar energy conversion efficiency have become hot topics in the utilization of solar energy. The application market of solar photovoltaic and thermal energy (PVT) technology is also developing continuously, and solar energy can be used to generate electricity and heat in a limited area.

[0003] At present, the solar PVT modules on the market are mainly framed modules. Since framed PVT modules need to be equipped with aluminum profile frames and anti-deformation metal purlins, the finished equipment is heavy, which is not conducive to its promotion and application when the roof load capacity is limited. At the same time, its cost and process difficulty are relatively high.

[0004] Therefore, it is necessary to develop a frameless solar PVT module. Utility Model Content

[0005] The utility model aims to provide a frameless solar PVT component, which can realize frameless installation of the solar PVT component, has a simple structure, low production difficulty and saves frame material cost.

[0006] The technical solution of this utility model:

[0007] A frameless solar PVT assembly comprises a transparent surface layer 1, a photovoltaic cell layer 3, a photovoltaic back plate layer 5, a heat exchange layer 7 and a junction box 9, wherein the transparent surface layer 1, the photovoltaic cell layer 3, the photovoltaic back plate layer 5 and the heat exchange layer 7 are arranged in sequence from top to bottom, the transparent surface layer 1 and the photovoltaic cell layer 3 are bonded by laminating with a first EVA layer 2, the photovoltaic cell layer 3 and the photovoltaic back plate layer 5 are bonded by laminating with a second EVA layer 4, and the photovoltaic back plate layer 5 and the heat exchange layer 7 are bonded by a bonding layer 6;

[0008] It also includes a junction box 9 and a fixing fixture 10 . The junction box 9 is adhered to the heat exchange layer 7 by means of organic silicon sealant. The frameless solar PVT assembly is reinforced by the fixing fixture 10 .

[0009] Furthermore, the front end of the heat exchange layer 7 is respectively provided with a working fluid inlet 7-1 and a working fluid outlet 7-2, and both the working fluid inlet 7-1 and the working fluid outlet 7-2 are connected to the middle cavity in the heat exchange layer 7; a working fluid circulation channel 7-3 is formed between the working fluid inlet 7-1, the middle cavity and the working fluid outlet 7-2; a position for installing a junction box 9 is opened on the heat exchange layer 7; the distance between the edges of the opening on the heat exchange layer 7 and the edges of the junction box 9 is not less than 2 cm on each side.

[0010] Furthermore, the working fluid circulation channel 7-3 where the working fluid inlet 7-1 and the working fluid outlet 7-2 are located is a transverse flow channel, and the remaining part of the working fluid circulation channel 7-3 is in the form of a combination of a transverse flow channel and a vertical flow channel; the working fluid circulation channel 7-3 adopts a water drop-honeycomb composite flow channel structure, in which the transverse flow channel is mainly a water drop-type flow channel, the vertical flow channel is mainly a honeycomb-type flow channel, and the flow channel at the junction of the transverse flow channel and the vertical flow channel is an irregular flow channel.

[0011] Furthermore, the water drop-shaped flow channels are arranged in a manner of large inlet and small outlet.

[0012] Furthermore, the fixing fixture 10 is a semi-U-shaped fixture 10-1 made of aluminum, which is connected to the heat exchange layer 7 by sealant, and the semi-U-shaped fixture 10-1 is connected to the pressing block 10-2 by rivets or self-tapping screws.

[0013] Furthermore, the frameless solar PVT assembly also includes purlins 8, which are fixed to the edge of the heat exchange layer 7 and fixed by a semi-U-shaped clamp 10-1 and a pressing block 10-2.

[0014] Furthermore, the heat exchange layer 7 is formed by double-sided inflation or brazing, and its material is aluminum, copper or steel; the working fluid inlet 7-1 and the working fluid outlet 7-2 are made of copper or steel.

[0015] Furthermore, self-adhesive rubber-plastic cotton with adhesive backing is provided between the heat exchange layer 7 and the purlin 8, and the purlin 8 is a square tube made of aluminum material.

[0016] Furthermore, the bonding layer 6 is a strong bonding adhesive.

[0017] Beneficial effects of the utility model: The transparent surface layer, photovoltaic cell layer and photovoltaic backboard layer of the solar PVT module provided by the utility model can be laminated separately and bonded with the heat exchange layer by bonding adhesive. The process is simple and does not require re-lamination, thus avoiding damage to the cell due to secondary lamination. The production cost is reduced due to the borderless design. After snowfall in winter, the solar PVT module is heated and snow easily falls off the module, thus improving its power generation efficiency.

[0018] The frameless solar PVT component of the utility model is fixed by a clamp, which not only reduces the weight of the finished product caused by the frame of the solar PVT component, but also maximizes the area of ​​the heat exchanger and the photovoltaic side to be equivalent, while saving its production cost and the difficulty of daily maintenance and cleaning, saving production material costs and increasing the heat exchange area to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 For Figure 1The corresponding schematic diagram of the structure when viewed from above;

[0021] Figure 3 It is a hierarchical structure diagram of the utility model;

[0022] Figure 4 This is a schematic diagram of an installation of the fixing fixture of the utility model;

[0023] Figure 5 This is another installation schematic diagram of the fixing fixture of the utility model;

[0024] In the figure: 1 transparent surface layer, 2 first EVA layer, 3 photovoltaic cell layer, 4 second EVA layer, 5 photovoltaic backboard layer, 6 bonding layer, 7 heat exchange layer, 7-1 working fluid inlet, 7-2 working fluid outlet, 7-3 circulation channel, 8 purlin, 9 junction box, 10 fixing fixture, 10-1 semi-"U"-shaped fixture, 10-2 pressing block. DETAILED DESCRIPTION

[0025] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings and technical solutions.

[0026] Example 1

[0027] Figure 3 This is a schematic diagram of the hierarchical structure of this example, a frameless solar PVT component, including a transparent surface layer 1, a first EVA layer 2, a photovoltaic cell layer 3, a second EVA layer 4, a photovoltaic backboard layer 5, an adhesive layer 6, a heat exchange layer 7, a purlin 8 and a junction box 9; the transparent surface layer 1, the photovoltaic cell layer 3, the photovoltaic backboard layer 5 and the heat exchange layer 7 are arranged in sequence from top to bottom, the transparent surface layer 1 and the photovoltaic cell layer 3 are laminated and bonded by the first EVA layer 2, the photovoltaic cell layer 3 and the photovoltaic backboard layer 5 are laminated and bonded by the second EVA layer 4, and the photovoltaic backboard layer 5 and the heat exchange layer 7 are bonded by the adhesive layer 6; the junction box 9 is adhered to the heat exchange layer 7 by silicone sealant; the purlin 8 is fixed to the edge of the heat exchange layer 7 and reinforced by a fixing clamp 10.

[0028] The transparent surface layer 1, photovoltaic cell layer 3 and photovoltaic back plate layer 5 of the solar PVT assembly can be laminated separately and bonded to the heat exchange layer by bonding adhesive.

[0029] The heat exchange layer 7 needs to be opened to reserve the position of the junction box 9, and the distance between the edges of the opening and the edge of the junction box 9 is not less than 2 cm on each side. The heat exchange layer 7 is made of double-sided inflation or brazing, and its material is a metal material with good thermal conductivity such as aluminum, copper, steel, etc. The surface of the heat exchange layer 7 is sprayed with 80±20μm epoxy resin.

[0030] The front end of the heat exchange layer 7 is provided with a working fluid inlet 7-1 and a working fluid outlet 7-2, both of which are connected to the middle cavity, and a working fluid circulation channel 7-3 is formed between the working fluid inlet 7-1, the middle cavity and the working fluid outlet 7-2. The working fluid circulation channel 7-3 is composed of a honeycomb structure and a water drop structure flow channel, and the flow channels between any adjacent structures are interconnected; the working fluid enters from the working fluid inlet 7-1 and flows to the working fluid outlet 7-2 through the working fluid circulation channel 7-3. When the working fluid is antifreeze / water, the heat exchange layer 7 is under pressure not less than 1.7MPa; when the working fluid is a refrigerant, the heat exchange layer 7 is under pressure not less than 2.5MPa.

[0031] The working fluid inlet 7-1 and the working fluid outlet 7-2 are made of copper or steel and connected to the interface of the heat exchange layer 7 by argon arc welding. The wall thickness of the working fluid outlet pipeline is 1mm, and the interface size is 9.52mm. Self-adhesive rubber-plastic cotton with adhesive backing is provided between the heat exchange layer 7 and the purlin 8. The purlin 8 is an aluminum square tube, and the size of the square tube does not exceed the height of the fixing fixture 10.

[0032] The junction box 9 is an mc4 photovoltaic connector.

[0033] The purlin 8 and the fixing fixture 10 fix the PVT module structure. The purlin 8 is parallel to the short side of the solar PVT module. The end of the purlin 8 is equal in length to the short side of the heat exchange layer 7 and is fixed by the fixing fixture 10. Corner fixtures are installed at the four corners of the solar PVT module to protect the corners and fix the transparent surface layer 1 and the heat exchange layer 7. The fixing fixture 8 is set in the middle of the short side of the solar PVT module.

[0034] There are three fixing fixtures 10 on each long side of the solar PVT module, with a spacing of no more than 1m / fixing fixture, which is equal to the number of purlins 8; and one fixture is installed in the middle of the short side.

[0035] The fixing fixture 10 is a semi-U-shaped fixture 10-1 made of aluminum, which is connected to the heat exchange layer 7 by sealant. The semi-U-shaped fixture 10-1 is connected to the pressing block 10-2 by rivets or self-tapping screws. The pressing block 10-2 is made of aluminum and its height is consistent with the height of the purlin 8.

[0036] The present invention is not limited to this embodiment, and any equivalent concepts or changes within the technical scope disclosed in the present invention are included in the protection scope of the present invention.

Claims

1. A frameless solar PVT module, characterized in that: The frameless solar PVT assembly comprises a transparent surface layer (1), a photovoltaic cell layer (3), a photovoltaic back plate layer (5), a heat exchange layer (7) and a junction box (9); the transparent surface layer (1), the photovoltaic cell layer (3), the photovoltaic back plate layer (5) and the heat exchange layer (7) are arranged in sequence from top to bottom; the transparent surface layer (1) and the photovoltaic cell layer (3) are bonded together by laminating via a first EVA layer (2); the photovoltaic cell layer (3) and the photovoltaic back plate layer (5) are bonded together by laminating via a second EVA layer (4); and the photovoltaic back plate layer (5) and the heat exchange layer (7) are bonded together by a bonding layer (6); It also includes a junction box (9) and a fixing fixture (10); the junction box (9) is adhered to the heat exchange layer (7) by means of organic silicon sealant; and the frameless solar PVT assembly is reinforced by means of the fixing fixture (10).

2. A frameless solar PVT module according to claim 1, characterized in that: The front end of the heat exchange layer (7) is respectively provided with a working fluid inlet (7-1) and a working fluid outlet (7-2), and both the working fluid inlet (7-1) and the working fluid outlet (7-2) are connected to the middle cavity in the heat exchange layer (7); a working fluid circulation channel (7-3) is formed between the working fluid inlet (7-1), the middle cavity and the working fluid outlet (7-2); a position for installing a junction box (9) is opened on the heat exchange layer (7); and the distance between the edges of the opening of the heat exchange layer (7) and the edges of the junction box (9) is not less than 2 cm on each side.

3. A frameless solar PVT module according to claim 2, characterized in that: The working fluid circulation channel (7-3) where the working fluid inlet (7-1) and the working fluid outlet (7-2) are located is a transverse flow channel, and the remaining part of the working fluid circulation channel (7-3) is in the form of a combination of a transverse flow channel and a vertical flow channel; the working fluid circulation channel (7-3) adopts a water drop-honeycomb composite flow channel structure, wherein the transverse flow channel is mainly a water drop-type flow channel, the vertical flow channel is mainly a honeycomb-type flow channel, and the flow channel at the junction of the transverse flow channel and the vertical flow channel is an irregular flow channel.

4. A frameless solar PVT assembly according to claim 3, characterized in that: The water drop-shaped flow channel is arranged in a manner of large inlet and small outlet.

5. The frameless solar PVT module according to claim 1, characterized in that: The fixing fixture (10) is a semi-U-shaped fixture (10-1) made of aluminum, which is connected to the heat exchange layer (7) by means of a sealant, and the semi-U-shaped fixture (10-1) is connected to the pressing block (10-2) by means of rivets or self-tapping screws.

6. A frameless solar PVT assembly according to claim 5, characterized in that: The frameless solar PVT assembly also includes a purlin (8), which is fixed to the edge of the heat exchange layer (7) and fixed in cooperation with a pressing block (10-2) through a semi-U-shaped clamp (10-1).

7. A frameless solar PVT assembly according to claim 2, characterized in that: The heat exchange layer (7) is formed by double-sided inflation or brazing, and its material is aluminum, copper or steel; the working fluid inlet (7-1) and the working fluid outlet (7-2) are made of copper or steel.

8. The frameless solar PVT module according to claim 6, characterized in that: Self-adhesive rubber-plastic cotton with adhesive backing is arranged between the heat exchange layer (7) and the purlin (8), and the purlin (8) is a square tube made of aluminum material.

9. The frameless solar PVT module according to claim 1, characterized in that: The bonding layer (6) is a strong bonding adhesive.

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