Photovoltaic panel snow removal device applied to flat roof in cold region

Abstract

The invention relates to the technical field of photovoltaic panel installation, in particular to a photovoltaic panel snow removal device applied to a flat roof in a cold region, which comprises a roof, a photovoltaic panel is arranged on the roof, two groups of support rails are obliquely and upwards arranged on two sides of the roof respectively, and the upper ends of one group of support rails are arranged below the upper ends of the other group of support rails; and a retractable roller shutter unit is arranged at the lower end of each group of supporting rails, and the roller shutter units release roller shutters to shield the photovoltaic panel. The roller shutter unit is additionally arranged on the roof, the photovoltaic panel is shielded during snowing, it is avoided that snow falls on the photovoltaic panel and is difficult to clean, and the difficulty and labor intensity of snow removal work are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic panel installation, and in particular to a snow removal device for photovoltaic panels on flat roofs in cold regions. Background Art

[0002] Photovoltaic systems have a short payback period and can get lower electricity prices, so distributed photovoltaic power generation is becoming more and more popular in the market. When photovoltaic panels are covered with snow, their power generation efficiency will be affected and even damaged. Snow will prevent sunlight from shining on the photovoltaic panels, limiting the temperature rise of the photovoltaic panels, thus reducing the power generation efficiency of the photovoltaic panels; especially in cold areas, if there is a blizzard, it will take many days for the snow on the roof to melt, which will affect the use of solar photovoltaic panels and accelerate the aging of solar photovoltaic panels, distribution lines and electronic components.

[0003] Based on the above problems, it is very important to remove snow from solar photovoltaic panels in time. Common snow removal methods include the following: (1) Snow removal with snow removal tools: In sunny conditions, the snow can be gently scraped off. However, in cold regions, the amount of snow is large and the snowing lasts for a long time. Using only snow removal tools to clear the snow is labor-intensive. (2) Heating and snow removal: Electric heating devices or heating coils can help photovoltaic panels to remove snow. The heating device forms hot air around the photovoltaic panels, thereby accelerating the melting of snow. However, the heating power of the heating device needs to be properly controlled to avoid causing the temperature of the photovoltaic panels to be too high, which will affect the performance of the photovoltaic panels. In addition, for roofs with a small slope, the additional electric heating device consumes too much electricity, and the effect is not particularly obvious in cold areas. (3) Tilting for snow removal: Many solar manufacturers tilt photovoltaic panels by 3-5 degrees when installing them, so that the snow can slide off by itself. If it cannot slide off, they can add slight vibrations or use air pressure to remove the snow. However, this can only clear the snow on the surface of the photovoltaic panel. The snow on the bottom layer is too solid to be removed.

[0004] In order to solve the above problems, a snow removal device for photovoltaic panels on flat roofs in cold areas is specially studied. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a snow removal device for photovoltaic panels on flat roofs in cold regions, so as to achieve the technical effect of clearing snow on the roof in a timely manner.

[0006] To achieve this technical purpose, the present invention adopts the following scheme: A snow-removing device for photovoltaic panels on flat roofs in cold regions comprises a roof, on which photovoltaic panels are placed, and two groups of support rails are arranged on both sides of the roof, tilted upward, respectively, with the upper end of one group of support rails being arranged below the upper end of the other group of support rails; and a retractable rolling shutter unit is arranged at the lower end of each group of support rails, and the rolling shutter unit releases the rolling shutter to shield the photovoltaic panel.

[0007] Compared with the prior art, the present invention has the following beneficial effects: The present invention adds a rolling shutter unit on the roof to shield the photovoltaic panel when it snows, thereby preventing snow from falling on the photovoltaic panel and being difficult to clean, thereby reducing the difficulty and labor intensity of snow removal operations.

[0008] Further, the preferred embodiment of the present invention is: Among the two groups of support rails, the upper end of one group of support rails is placed below the upper end of the other group of support rails.

[0009] It also includes a flip mechanism, which includes a flip motor and a flip plate. The output end of the flip motor is connected to the flip plate, and the rolling shutter unit is installed on the flip plate.

[0010] The supporting track comprises two guide rods, and the opposite sides of the guide rods are respectively provided with sliding grooves, and the rolling curtain climbs upward along the sliding grooves.

[0011] A support rod is provided at both ends of each guide rod. The upper end of the support rod close to the rolling shutter unit is connected to the guide rod, and the lower end is connected to the flip plate. The upper end of the support rod away from the rolling shutter unit is movably connected to the guide rod, and the lower end is fixedly connected to the roof.

[0012] There are 3-4 groups of rain and snow sensors installed on the roof, which are linked to the rolling shutter units.

[0013] It also includes a time relay, which is jointly controlled with a flip motor.

[0014] The roof is also equipped with sound and light alarm lights, which are linked to the flip motor.

[0015] The surface of the rolling curtain is also provided with a plurality of groups of pressure sensors, and the pressure sensors are linked with the flip motor for control. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 A schematic diagram of flip snow removal; Figure 3 It is a schematic diagram of the connection between the guide rod and the roller blind; Figure 4 for Figure 1 A magnified view of part A; Markings in the figure are: 1. Roof; 2. Photovoltaic panel; 3. Rolling shutter unit; 31. Rolling shutter; 32. Rolling shutter shaft; 33. Rolling shutter motor; 34. Pulley; 35. Slide; 4. Flipping mechanism; 41. Flipping plate; 42. Flipping motor; 43. Rotating shaft; 5. Support track; 51. Guide rod; 6. Support rod two; 7. Support rod one; 8. Pad. DETAILED DESCRIPTION

[0017] In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail through the following specific implementation methods, but the present invention is not limited thereto.

[0018] A photovoltaic panel snow removal device for flat roofs in cold regions, wherein a photovoltaic panel 2 is installed on a roof 1, and two groups of support rails 5 are arranged on the left and right sides of the roof 1, respectively, and are inclined upward. A retractable roller shutter unit 3 is arranged at the lower end of each group of rails, and the roller shutter unit 3 releases a roller shutter 31 along the support rail 5 to shield the photovoltaic panel 2.

[0019] A flip mechanism 4 is also provided below the rolling shutter unit 3. The flip mechanism 4 is composed of a flip motor 42 and a flip plate 41. The flip motor 42 is installed on the roof 1. The output end of the flip motor 42 is connected to a rotating shaft 43. Both ends of the rotating shaft 43 are rotatably installed on the roof 1. The rotating shaft 43 is fixedly connected to the flip plate 41. The flip motor 42 drives the rotating shaft 43 to rotate, so that the flip plate 41 rotates with the rotating shaft 43. In this embodiment, a pad 8 can be added below the flip plate 41 to provide auxiliary support for the flip plate 41 when the flip plate 41 is in the initial state (i.e., no reversal occurs, and the rolling shutter unit 3 is used to shield the photovoltaic panel 2).

[0020] The rolling curtain unit 3 is composed of a rolling curtain motor 33, a rolling curtain shaft 32 and a rolling curtain 31. The rolling curtain motor 33 is installed on the flip plate 41. The output end of the rolling curtain motor 33 is connected to the rolling curtain shaft 32. One end of the rolling curtain 31 is connected to the rolling curtain shaft 32. The rolling curtain motor 33 drives the rolling curtain shaft 32 to rotate in the forward and reverse directions, and drives the rolling curtain shaft 32 to retract and extend the rolling curtain 31.

[0021] In this embodiment, in order to avoid interference between the two roller shutters 31 during the construction of the roller shutters 31, the upper end of the right support rail 5 is placed below the upper end of the left support rail 5, that is, when the roller shutters 31 are released, the upper end of the right roller shutter 31 is placed below the upper end of the left roller shutter 31.

[0022] Each set of supporting rails 5 is respectively composed of two guide rods 51 symmetrically arranged at the front and rear. The opposite sides of the two guide rods 51 are respectively provided with slide grooves 35 along the length direction of the guide rods 51. The rolling curtain 31 in this embodiment is a commercially available product, which is composed of multi-jointed movable door panels connected in series. Pulleys 34 are respectively installed at the front and rear ends of each door panel. The rolling curtain 31 is slidably connected with the slide groove 35 through the pulley 34. When the rolling curtain 31 is retracted or released, it can climb and descend smoothly through the cooperation of the pulley 34 and the slide groove 35.

[0023] Two supporting rods are respectively arranged under each guide rod 51, wherein the supporting rod close to one end of the rolling shutter unit 3 is supporting rod 1 7, the upper end of supporting rod 1 7 is fixedly connected to the guide rod 51, and the lower end of supporting rod 1 7 is fixedly connected to the flip plate 41; the supporting rod away from one end of the rolling shutter unit 3 is supporting rod 2 6, the lower end of supporting rod 2 6 is fixedly connected to the roof 1, the upper end of supporting rod 2 6 is movably connected to the guide rod 51, and supporting rod 2 6 supports the guide rod 51.

[0024] In this embodiment, 3-4 groups of rain and snow sensors are arranged on the roof 1, and the rain and snow sensors are controlled jointly with the roller shutter motor 33 through a controller (the controller in this application can be a PLC controller). When the rain and snow sensor feeds back the collected rain and snow signals to the controller, the controller sends a roller shutter release command to the roller shutter motor 33, and the roller shutter motor 33 rotates to make the roller shutter 31 climb along the support track 5.

[0025] In this embodiment, a time relay is also provided, and the time relay is controlled by the controller and the flip motor 42. When the rolling shutter motor 33 is started, the time relay starts timing. When the set time is reached, the controller controls the flip motor 42 to start, and the flip motor 42 drives the flip plate 41 and the overall structure thereon to flip and remove snow, so that the snow on the rolling shutter 31 falls to the ground. After the snow removal is completed, the flip motor 42 reverses to reset the flip plate 41, and the snow on the rolling shutter 31 falls back to the top of the photovoltaic panel 2 to block the snow. Snow is cleared regularly by the time relay to avoid excessive snow accumulation.

[0026] In this embodiment, when the flip motor 42 flips to remove snow, the right flip motor 42 starts with a delay compared to the left flip motor 42. When the flip plate 41 is reset, the left flip motor 42 starts with a delay compared to the right flip motor 42 to ensure that the left roller curtain 31 covers the upper end of the right roller curtain 31.

[0027] In this embodiment, the roof 1 is also provided with an audible and visual alarm light, which is controlled by the controller and the flip motor 42. When the flip motor 42 starts to flip and remove snow, the audible and visual alarm light sends out an audible and visual alarm signal.

[0028] In this embodiment, a plurality of pressure sensors are provided on the surface of the roller curtain 31, and the pressure sensors are controlled jointly with the flip motor 42 through a controller. When the thickness of snow on the surface of the roller curtain 31 reaches a certain pressure, the controller issues a command and the flip motor 42 performs a flipping action to control the snow clearing time according to the amount of snowfall to avoid excessive snow accumulation on the roller curtain 31.

[0029] The present invention sets two inclined support rails so that the rolling curtain can climb smoothly along the support rails, and the rolling curtain effectively shields the photovoltaic panel to prevent snow from falling on the photovoltaic panel; when cleaning the snow accumulation chamber on the rolling curtain, the snow can be turned over and removed by various methods such as timing and pressure detection to avoid excessive snow accumulation on the rolling curtain. The device can effectively prevent snow accumulation on the photovoltaic panel, and the device does not require manual snow removal on the roof, reducing safety hazards.

[0030] Finally, it should be noted that the above are only preferred embodiments of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and variations fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.

Claims

1. A snow removal device for photovoltaic panels on flat roofs in cold regions, comprising a roof, on which photovoltaic panels are placed, characterized in that: Two groups of support rails are arranged on both sides of the roof, tilted upward, and the upper end of one group of support rails is placed below the upper end of the other group of support rails; and a retractable roller shutter unit is arranged at the lower end of each group of support rails, and the roller shutter unit releases the roller shutter to shield the photovoltaic panel.

2. The snow removal device for photovoltaic panels on flat roofs in cold regions according to claim 1 is characterized in that: Among the two groups of support rails, the upper end of one group of support rails is placed below the upper end of the other group of support rails.

3. The snow removal device for photovoltaic panels on flat roofs in cold regions according to claim 2 is characterized in that: It also includes a flip mechanism, which includes a flip motor and a flip plate. The output end of the flip motor is connected to the flip plate, and the rolling shutter unit is installed on the flip plate.

4. The snow removal device for photovoltaic panels on flat roofs in cold regions according to claim 3 is characterized in that: The supporting track comprises two guide rods, and the opposite sides of the guide rods are respectively provided with sliding grooves, and the rolling curtain climbs upward along the sliding grooves.

5. The snow removal device for photovoltaic panels on flat roofs in cold regions according to claim 4 is characterized in that: A support rod is provided at both ends of each guide rod. The upper end of the support rod close to the rolling shutter unit is connected to the guide rod, and the lower end is connected to the flip plate. The upper end of the support rod away from the rolling shutter unit is movably connected to the guide rod, and the lower end is fixedly connected to the roof.

6. The snow removal device for photovoltaic panels on flat roofs in cold regions according to claim 1 is characterized in that: There are 3-4 groups of rain and snow sensors installed on the roof, which are linked to the rolling shutter units.

7. The snow removal device for photovoltaic panels on flat roofs in cold regions according to claim 3 is characterized in that: It also includes a time relay, which is jointly controlled with a flip motor.

8. The snow removal device for photovoltaic panels on flat roofs in cold regions according to claim 3 is characterized by: The roof is also equipped with sound and light alarm lights, which are linked to the flip motor.

9. The snow removal device for photovoltaic panels on flat roofs in cold regions according to claim 3 is characterized by: The surface of the rolling curtain is also provided with a plurality of groups of pressure sensors, and the pressure sensors are linked with the flip motor for control.

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