Assist device for snow removal, dust removal and water diversion of photovoltaic module and snow removal heating system comprising same

Abstract

The utility model provides an assistor for snow removal, dust removal and water diversion of a photovoltaic assembly, which comprises a transverse part, a vertical part and a heating assembly, the transverse part is arranged along an X plane, the upper end of the vertical part is connected to the side surface of the transverse part, the lower end of the vertical part extends towards the direction vertical to the X plane, and the heating assembly is at least arranged in the transverse part. The utility model further provides a snow removing and heating system which comprises a power supply, a string composed of the photovoltaic modules and the assistor used for removing snow, removing dust and guiding water of the photovoltaic modules. The problems of dust removal and water guide are solved, and the problem of snow removal in winter is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic maintenance technical field especially, it is a kind of auxiliary device for photovoltaic module snow removal, dust removal, water guide and the snow removal heating system comprising it. BACKGROUND

[0002] With the decline of photovoltaic product price, photovoltaic power generation cost is continuously reduced, China's photovoltaic industry scale expands steadily, technological innovation is continuously promoted, export growth is continuously improved, up to 2023, the national photovoltaic power generation scale grows rapidly, centralized new about 88.8GW, distributed new about 86.2GW.

[0003] Photovoltaic industry matures gradually, but there are still some inevitable problems in actual operation process, affect power generation efficiency, photovoltaic module snow is one of them.In northern region, winter snow can cover photovoltaic module array, because new snow friction is big, only rely on the inclination angle of photovoltaic module cannot make that snow naturally falls off, snow covers on photovoltaic module, causes photovoltaic module to be unable to generate electricity;And with the increase of snowfall, snow will further accumulate to certain thickness, combined with winter low temperature can freeze snow, the adhesion of frozen snow is stronger, even if the weather turns fine, it is also very difficult to melt completely, photovoltaic module is blocked by snow and thus long-term unable to generate electricity normally, loses a lot of electric quantity, and component surface also long-term bears snow load pressure.Currently, there is no automatic snow removal device for photovoltaic module on the market, all adopt manual snow removal, and labor intensity is big, and when removing snow on roof type photovoltaic module, worker needs to climb to roof, because roof is wet and slippery when snow, the danger is extremely high.

[0004] There is a water guide clamp for clamping in the lower frame of photovoltaic module on the market currently, the water guide clamp can guide the rainwater gathered in the lower edge of photovoltaic module out, because the rainwater gathered in the lower edge of photovoltaic module carries a lot of dust of photovoltaic module, if not timely guide, it will lead to more and more sludge, affect photovoltaic module power generation efficiency, but the water guide clamp only has the single effect of water guide, cannot realize the effect of snow melting. CONTENT OF UTILITY MODEL

[0005] The utility model provides a kind of for photovoltaic module snow removal, dust removal, water guide auxiliary device, not only have water guide function, also solve photovoltaic module fast snow removal problem, do not need manual snow removal, improve snow removal efficiency and security.

[0006] The utility model embodiment provides a kind of for photovoltaic module snow removal, dust removal, water guide auxiliary device, including horizontal part, vertical part and heating assembly, the horizontal part is along X plane setting, the vertical part one end is connected in the width direction of horizontal part one side, and the other end extends to the direction perpendicular to X plane, and heating assembly is at least built-in in the horizontal part.

[0007] The auxiliary card is installed on the lower frame of the photovoltaic module, the X plane where the horizontal part is located is parallel to the upper surface of the lower frame of the photovoltaic module, during installation, the horizontal part is attached to the upper surface of the lower frame, and the vertical part extends downward along the side surface of the lower frame, thereby clamping the lower frame and guiding the flow of accumulated water, and the heating assembly built in the horizontal part can heat when there is snow, so that the temperature of the auxiliary card is increased, the surrounding snow is melted, once the snow is melted and the photovoltaic module is exposed, the photovoltaic module can absorb solar energy and heat, thereby melting the snow on the entire photovoltaic module, so that the purpose of snow removal is achieved.

[0008] In some examples, the heating assembly is built in the horizontal part and the vertical part, extends from one end of the vertical part to the horizontal part, is bent at the connection between the horizontal part and the vertical part, and then extends along the length direction of the horizontal part.

[0009] The heating assembly is arranged in the horizontal part and the vertical part, has a large laying area, has a better heating effect, and has a better snow removal effect on thicker snow. Moreover, the heating assembly is continuously and uninterruptedly bent in the horizontal part and the vertical part, and the wiring is simple.

[0010] In some examples, the vertical part is connected to the side surface of one end of the length direction of the horizontal part, and the horizontal part and the vertical part are connected to form an inverted L shape.

[0011] The horizontal part and the vertical part are connected to form an inverted L shape, the heating assembly is continuously and uninterruptedly bent at the connection between the horizontal part and the vertical part, and the heating assembly extends along the length direction of the horizontal part and the vertical part, so that the heating assembly is arranged in each part of the auxiliary card, and the heating performance is more superior.

[0012] In some examples, the lower end of the vertical part is provided with a hook part on the side surface, and the hook part and the horizontal part are located on the same side of the vertical part and together enclose a C-shaped clamping area.

[0013] The auxiliary card is clamped on the lower frame of the photovoltaic module by using the C-shaped clamping area, and is clamped on the lower frame of the photovoltaic module by using the horizontal part and the hook part, so that the clamping effect is more firm.

[0014] In some examples, the auxiliary card further comprises a connecting line, one end of the connecting line is exposed, and the other end of the connecting line enters the vertical part from the end of the hook part and is connected to the heating assembly in the vertical part.

[0015] The connecting line can introduce the power supply into the heating assembly, the connecting line enters the auxiliary card from the hook part, and the hook part is shielded below the photovoltaic module during use and is not easy to be eroded by rainwater and the like, so that the connecting line connected to the hook part can also be protected from wind and rain erosion, thereby prolonging the service life.

[0016] In some examples, the exposed end of the connecting line is connected to an aviation plug. The aviation plug has a simple structure, a low cost, and is convenient to plug and unplug.

[0017] In some examples, the horizontal part and the vertical part are made of a polymer hydrophilic material. The water and mud accumulated under the photovoltaic module is more likely to flow out of the photovoltaic module along the guide of the horizontal part and the vertical part, solving the water guide problem.

[0018] In some examples, the heating assembly is an electric heating tape. Constant temperature heating can be achieved, and the cost is low, the power is low, and the heating is stable and reliable.

[0019] In some examples, the length of the horizontal part is 4-10 cm. The length of the horizontal part is short, the coverage area is small, the use of materials is less, the overall structure of the auxiliary device is compact, the heating assembly is built-in in the horizontal part, and the requirement of melting snow can be met.

[0020] The utility model embodiment further provides a snow removal heating system, including above for photovoltaic module snow removal, dust removal, water guide's auxiliary device, power supply and piece arrangement's photovoltaic module, piece arrangement's photovoltaic module lower frame all set up for photovoltaic module snow removal, dust removal, water guide's auxiliary device, and all for photovoltaic module snow removal, dust removal, water guide's auxiliary device between through aviation plug connection and uniform connection on power supply.

[0021] The aviation plug can connect several auxiliary devices in the same photovoltaic module string into a heating net, control the heating of the auxiliary devices, realize the simultaneous snow removal of the photovoltaic module string, and the efficiency is high and the safety is high.

[0022] The utility model has the advantages of the following:

[0023] Developing the device for photovoltaic module snow removal, dust removal and water guide can solve the problems of dust removal and water guide, and the problem of snow removal in winter. From the aspect of safety in production, the current photovoltaic power generation project practitioners generally have low cost control and safety awareness, and still adopt manual dust removal and snow removal. The technical scheme eliminates the safety hazard of manual snow removal, and ensures the safe, reliable and efficient operation of the photovoltaic power station in winter. From the aspect of economic benefits, the technical scheme has low cost but can greatly improve the economic benefits of photovoltaic power generation. A 1MW photovoltaic power station can generate 20-50 thousand degrees per year on average, and the direct economic benefits are 20-50 thousand, especially in the northern region where snow often falls in winter, the economic benefits are more significant. DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the utility model, not all embodiments. For ordinary skilled in the art, other drawings can be obtained without creative labor according to these drawings.

[0025] Figure 1This is a schematic diagram of the installation of the auxiliary device of this utility model;

[0026] Figure 2 This is a perspective view of the auxiliary device of this utility model;

[0027] Figure 3 This is a schematic diagram showing the exposed heating component of the auxiliary device of this utility model;

[0028] Figure 4 This is a schematic diagram of the snow removal, dust removal, and water guiding system of the photovoltaic module of this utility model.

[0029] In the picture:

[0030] 1. Horizontal section, 11. Flange, 2. Vertical section, 3. Heating component, 31. Copper core, 32. Conductive core, 33. Low-smoke halogen-free flame-retardant polyolefin, 34. Tin-plated copper braided layer, 35. Outer skin, 4. Hook, 5. Connecting wire, 6. Aviation plug, 7. Photovoltaic module, 71. Bottom frame, 8. Power supply. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0033] Example 1

[0034] like Figure 1 As shown, this utility model provides an auxiliary device for snow removal, dust removal, and water drainage of photovoltaic modules. It is installed on the lower aluminum alloy frame 71 of the photovoltaic module 7 and includes a horizontal part 1, a vertical part 2, and a heating component 3. The horizontal part 1 is arranged along the X-plane, and the upper end of the vertical part 2 is connected to one side of the horizontal part 1, while the lower end extends downward perpendicularly to the horizontal part 1. The X-plane is parallel to the upper surface of the lower frame 71 of the photovoltaic module. During installation, the horizontal part 1 is attached to the upper surface of the aluminum alloy lower frame 71. Since the lower frame 71 has a square cross-section, the vertical part 2, which is perpendicular to the horizontal part 1, can extend along the height direction of the lower frame to the lower surface of the aluminum alloy lower frame 71, thus achieving installation. The overall height of the auxiliary device is approximately 35cm, which is basically compatible with the size of the lower aluminum alloy frame 71 of the photovoltaic module.

[0035] Specifically, the length direction of the horizontal part 1 is arranged along the length direction of the lower frame 71 of the photovoltaic module, and the vertical part 2 is connected to the side of the horizontal part 1 in the width direction, which can be clamped on the lower frame 71 of the photovoltaic module with a square cross section. The vertical part 2 extends downward along the side of the lower frame 71, which not only plays a clamping role but also has the effect of guiding water accumulation.

[0036] As shown in Figure 2 , the auxiliary device is provided with a heating assembly 3. On the one hand, the heating assembly 3 can generate heat when there is snow, so that the temperature at the location is increased, the snow is melted, and once the snow is melted to expose the photovoltaic module, the photovoltaic module will generate heat to absorb solar energy, thereby melting the snow on the entire photovoltaic module, achieving the purpose of snow removal, and achieving maximum benefit at a small cost. On the other hand, the heating assembly 3 needs to be powered on in rainy and snowy weather. The heating assembly in the auxiliary device is not simply stacked on the original basis, but is sealed and protected inside the auxiliary device. Not only does it play an insulating role, but also reduces the overall volume.

[0037] Further, in the design of the heating assembly 3, the heating assembly 3 is arranged in the horizontal part 1 and the vertical part 2 of the auxiliary device. Not only can the snow on the horizontal part 1 be melted, but also the thicker snow extending to the vertical part 2 can be melted, and the snow removal effect on the thicker snow is better.

[0038] In other embodiments, the heating assembly 3 can also be built-in only in the horizontal part 1, which is also within the protection scope of the present embodiment.

[0039] In the present embodiment, in the overall structure of the auxiliary device, the vertical part 2 is connected to the side of one end of the length direction of the horizontal part 1, and the horizontal part 1 and the vertical part 2 are connected to form an inverted L-shaped whole, which facilitates the heating assembly 3 to be arranged in an L-shaped continuous line in the auxiliary device, i.e. extending from the lower end of the vertical part 2 to the upper end of the vertical part 2, and then bending from the upper end of the vertical part 2 to extend along the horizontal part 1, thereby avoiding the use of multiple heating assemblies 3 and simplifying the wiring. One heating assembly 3 only needs to be bent at the connection between the horizontal part 1 and the vertical part 2, and can extend along the length of the horizontal part 1 and the vertical part 2. Thus, the heating assembly 3 is arranged in each part of the auxiliary device, and the heating performance is more superior.

[0040] In other embodiments, the upper end of the vertical part 2 can also be connected to the side of the middle of the length direction of the horizontal part 1 (the horizontal part 1 and the vertical part 2 form a T-shaped whole) or the side of the two ends, which is also within the protection scope of the present embodiment.

[0041] In combination with Figure 1 , 2As shown, the lower end of the vertical part 2 is also provided with a hook part 4 extending downward from the lower surface of the lower frame 71 to help the auxiliary device to be firmly installed with the lower frame 71. The hook part 4 is protruded from the side surface of the lower end of the vertical part 2, at this time, the hook part 4 and the horizontal part 1 are located on the same side of the vertical part 2, and together with the vertical part 2, a C-shaped clamping area is formed, which corresponds to the contour of the lower frame 71 of the photovoltaic module. Among them, the other side edge of the horizontal part 1 is also provided with a flange 11 to further assist clamping. In this way, the horizontal flange 11 clamps the upper part of the lower frame of the photovoltaic module, and the hook part 4 clamps the lower part of the lower frame 71 of the photovoltaic module, and the clamping is relatively firm.

[0042] Further, as shown in Figure 3 The heating assembly 3 is an electric heating tape, which can realize constant temperature heating, has low cost and low power, and is stable and reliable in heating. The electric heating tape comprises, from inside to outside, a copper core 31, a conductive core 32, a low-smoke halogen-free flame-retardant polyolefin 33, a tinned copper braid layer 34, and an outer skin 35. The copper core 31 is parallelly arranged in two, and a conductive core 32 made of PCTPTC material is uniformly extruded between the two copper cores 31. After the PCTPTC material is melted, extruded and shaped, the carbon particles dispersed therein form countless fine conductive carbon networks. When they are connected across the two parallel copper cores 31, they form the PCTPTC loop of the core 32. When the copper core 31 is connected to the power supply, the current flows laterally through the PCTPTC material layer to reach the other copper core 31 to form a parallel loop. The PCTPTC layer is a resistance heating body connected in parallel between the copper cores 31, which converts electrical energy into heat energy to heat and keep the system. When the core 32 rises to the corresponding high resistance area, the resistance reaches a level that almost blocks the current, and the temperature of the core 32 will not rise any more to achieve automatic temperature limiting.

[0043] Continuing to refer to Figure 2 The auxiliary device also comprises a connecting line 5 for connecting an external power supply to supply power to the heating assembly 3. One end of the connecting line 5 is exposed, and the other end enters the vertical part 2 from the end of the hook part 4 and is connected to the heating assembly 3 in the vertical part 2. Among them, the connecting line 5 enters the auxiliary device from the hook part 4, and the hook part 4 is shielded below the photovoltaic module when in use and is not easily eroded by rain and the like. Therefore, the connecting line 5 is connected to the hook part 4, which can also be protected from wind and rain erosion to prolong the service life.

[0044] It is worth mentioning that the exposed end of the connecting line 5 is connected to an aviation plug 6. By using the male-female adaptation characteristics of the aviation plug 6, the auxiliary devices installed on a plurality of photovoltaic modules can be quickly connected to realize power-on and facilitate piecewise control and management. In this embodiment, the aviation plug 6 adopts a two-hole structure, and in other embodiments, a three-hole or four-hole structure can also be adopted, which is also within the protection scope of the utility model.

[0045] In terms of materials used, the horizontal part 1 and the vertical part 2 are made of hydrophilic polymer materials. In this way, the mud and water that accumulate at the bottom edge of the photovoltaic module can more easily flow out of the photovoltaic module along the guide of the horizontal and vertical parts, solving the problems of sludge accumulation and water drainage.

[0046] In terms of size, the horizontal part 1 is 4 to 10 cm long. The overall structure of the auxiliary device is compact and easy to install.

[0047] Example 2

[0048] like Figure 4 As shown, this utility model embodiment also provides a snow removal heating system, including a power supply 8, a string of photovoltaic modules 7, and an auxiliary device for snow removal, dust removal, and water diversion of the photovoltaic modules as described in Embodiment 1. The auxiliary device is installed on the lower frame of each photovoltaic module in the string. All auxiliary devices are connected in series via aviation plugs and uniformly connected to the power supply 8. A heating network is formed inside the photovoltaic string. In snowy weather, the heating can be turned on to melt the snow, avoiding the need for manual snow removal, improving safety, and increasing efficiency.

[0049] In other embodiments, all auxiliary devices in the photovoltaic string can also adopt other circuit connection methods, which are also within the protection scope of this utility model, as long as the auxiliary devices can be under the same power control.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An auxiliary device for snow removal, dust removal, water guide of a photovoltaic module, characterized in that: The auxiliary device comprises a horizontal part, a vertical part and a heating assembly, the horizontal part is arranged along the X plane, the upper end of the vertical part is connected to the side of the horizontal part, and the lower end extends to the direction perpendicular to the X plane, and the heating assembly is arranged in the horizontal part.

2. The snow, dust and water removal aid for photovoltaic modules according to claim 1, characterized in that, The heating assembly is arranged in the horizontal part and the vertical part, and extends from the lower end of the vertical part to the horizontal part, is bent at the joint of the horizontal part and the vertical part, and then extends along the length direction of the horizontal part.

3. The snow, dust and water removal aid for photovoltaic modules according to claim 1 or 2, characterized in that: The vertical part is connected to the side of the length direction end of the horizontal part, and the horizontal part and the vertical part are connected to form an inverted L shape.

4. The snow, dust and water removal aid for photovoltaic modules according to claim 2, characterized in that: The lower end of the vertical part is provided with a hook part on the side, the hook part and the horizontal part are located on the same side of the vertical part, and together with the vertical part form a C-shaped clamping area.

5. The snow, dust and water removal aid for photovoltaic modules according to claim 4, characterized in that: The auxiliary device further comprises a connecting wire, one end of the connecting wire is exposed, the other end of the connecting wire enters the vertical part from the end of the hook part, and is connected with the heating assembly in the vertical part.

6. The snow, dust and water removal aid for photovoltaic modules according to claim 5, characterized in that: The exposed end of the connecting wire is connected with an aviation plug.

7. The snow, dust and water removal aid for photovoltaic modules according to claim 1, characterized in that: The horizontal part and the vertical part are made of a high-molecular hydrophilic material.

8. The snow, dust and water removal aid for photovoltaic modules according to claim 1, characterized in that: The heating assembly is an electric heating tape.

9. The snow, dust and water removal aid for photovoltaic modules according to claim 1, characterized in that: The length of the horizontal part is 4-10 cm.

10. A snow melting heating system, characterized by: The auxiliary device comprises a power supply, a group string composed of photovoltaic assemblies, and the auxiliary device for snow removal, dust removal and water guide of the photovoltaic assembly according to any one of claims 1-9, the auxiliary device is installed on the lower frame of each photovoltaic assembly in the group string, all auxiliary devices are connected through aviation plugs and are uniformly connected to the power supply.

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