Photovoltaic system

Abstract

The utility model discloses a photovoltaic system, and belongs to the technical field of photovoltaics. The photovoltaic system is characterized in that the photovoltaic laminated piece is mounted in the frame; the pressure sensor is mounted on the back surface of the photovoltaic laminating piece and abuts against the back surface of the photovoltaic laminating piece; the non-elastic rope is connected between the pressure sensor and the frame in a tensioning mode. Through the arrangement of the pressure sensor and the non-elastic rope, the test sensitivity is high, the stability is good, accumulated snow and accumulated water are effectively removed, the situation that part of batteries are in a reverse bias state due to the fact that the pressure sensor is arranged on the front face of the photovoltaic laminated piece is prevented, and therefore the negative influence caused by the hot spot effect and current mismatch can be relieved; meanwhile, the non-elastic rope is used for replacing a common rigid structure to support the pressure sensor, damage caused by mutual extrusion of the pressure sensor and the photovoltaic laminated piece is reduced, and therefore the service life of a photovoltaic system is prolonged.

Description

Technical Field

[0001] The present application belongs to the field of photovoltaic technology, and in particular to a photovoltaic system. Background Art

[0002] With the transformation of the global energy structure, solar photovoltaic power generation, as an inexhaustible clean energy, has attracted more and more attention and attention. However, in some parts of the world's middle and high latitudes in winter and in plateau areas, the photovoltaic power generation is closely related to the degree of snow accumulation. Reliable data shows that the loss of power generation caused by snow or dust will not be less than 5%. On the one hand, snow directly blocks light and reduces the power generation efficiency of photovoltaic laminates. On the other hand, the load caused by snow accumulation is also transmitted to the components in the form of pressure, which will directly cause deformation or even damage to the components.

[0003] People have never stopped studying snow accumulation on components, and have derived solutions to the problem of snow accumulation on components in roughly three directions. The first is manual snow removal, which is still used in most ground power stations. However, manual snow removal is not only time-consuming and labor-intensive, but also extremely inefficient. The second is semi-automatic snow removal, which mostly uses snowplows. Although this improves efficiency, it is obvious that semi-automatic snow removal is not suitable for all project terrains. The third is fully automatic snow removal, which is mostly based on snow-clearing robots, but this method is a big test for the project's initial investment and operation and maintenance funds. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a photovoltaic system with high test sensitivity and good stability, which helps to effectively remove snow and water accumulation, prevents the pressure sensor from being located on the front of the photovoltaic laminate and causes some cells to be in a reverse bias state, can alleviate the negative effects caused by the hot spot effect and current mismatch, reduce the damage caused by mutual squeezing between the pressure sensor and the photovoltaic laminate, and extend the service life of the photovoltaic system.

[0005] In a first aspect, the present application provides a photovoltaic system, comprising:

[0006] frame;

[0007] A photovoltaic laminate, wherein the photovoltaic laminate is installed in the frame;

[0008] a pressure sensor mounted on the back side of the photovoltaic laminate and abutting against the back side of the photovoltaic laminate;

[0009] A non-elastic rope is tensioned and connected between the pressure sensor and the frame.

[0010] According to the photovoltaic system of the present application, through the arrangement of the above-mentioned pressure sensor and the inelastic rope, the test sensitivity is high and the stability is good, which helps to effectively remove snow and water. Combined with the structural design in which the pressure sensor is arranged on the back of the photovoltaic laminate, it prevents the pressure sensor from being arranged on the front of the photovoltaic laminate, causing some batteries to be in a reverse biased state, thereby alleviating the negative effects caused by the hot spot effect and current mismatch, thereby reducing the maintenance frequency of the photovoltaic laminate. At the same time, the inelastic rope is used to replace the common rigid structure to support the pressure sensor, reducing the damage caused by mutual squeezing between the pressure sensor and the photovoltaic laminate, thereby extending the service life of the photovoltaic system.

[0011] According to one embodiment of the present application, the frame includes:

[0012] A frame body, wherein the photovoltaic laminate is installed in the frame body;

[0013] A pressing block is installed on the frame body, and the inelastic rope is connected to the pressing block.

[0014] According to one embodiment of the present application, a vertical distance from one end of the inelastic rope connected to the pressure sensor to the photovoltaic laminate is greater than a vertical distance from one end of the inelastic rope connected to the frame to the photovoltaic laminate.

[0015] According to an embodiment of the present application, there are multiple inelastic ropes, and the extension directions of the inelastic ropes are different.

[0016] According to one embodiment of the present application, a plurality of the inelastic ropes are connected to at least two sides of the frame.

[0017] According to one embodiment of the present application, at least part of the edges of the frame are connected to a plurality of the non-elastic ropes.

[0018] According to an embodiment of the present application, a plurality of the inelastic ropes are connected to two long sides of the frame, and each of the long sides is connected to a plurality of the inelastic ropes.

[0019] According to an embodiment of the present application, the inelastic rope is tensionedly connected to two opposite sides of the frame, and the pressure sensor is supported at the middle portion of the inelastic rope.

[0020] According to one embodiment of the present application, the upper surface of the frame is higher than the upper surface of the photovoltaic laminate to form a groove, and at least part of the side beams in the frame are provided with a water guide groove connected to the groove.

[0021] According to an embodiment of the present application, the water guide groove is arranged on the lower side beam of the frame.

[0022] According to one embodiment of the present application, the lower side beam of the frame is provided with a plurality of the water guide grooves distributed at intervals.

[0023] According to one embodiment of the present application, the photovoltaic system further includes:

[0024] A heater is installed on the lower side beam of the frame.

[0025] According to one embodiment of the present application, the heater is located at the outer side and back area of ​​the rocker.

[0026] According to one embodiment of the present application, the upper surface of the heater is not higher than the upper surface of the lower side beam.

[0027] According to an embodiment of the present application, the upper surface of the heater and the surface of the heater facing away from the bottom rail are connected in an arc shape.

[0028] According to an embodiment of the present application, the lower side beam is provided with a plurality of water guide grooves that are spaced apart and distributed, and the heater is located between the plurality of water guide grooves.

[0029] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] Figure 1 It is one of the structural schematic diagrams of the photovoltaic system provided in the embodiment of the present application;

[0032] Figure 2 This is the second structural schematic diagram of the photovoltaic system provided in the embodiment of the present application;

[0033] Figure 3 This is the third structural schematic diagram of the photovoltaic system provided in the embodiment of the present application.

[0034] Reference numerals:

[0035] Photovoltaic system 100;

[0036] Frame 110, frame body 111, water guide groove 1111, pressing block 112;

[0037] Photovoltaic laminate 120 , pressure sensor 130 , inelastic rope 140 , heater 150 , photovoltaic support 160 . DETAILED DESCRIPTION

[0038] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0039] The present application discloses a photovoltaic system 100 .

[0040] Reference below Figure 1-Figure 3 A photovoltaic system 100 according to an embodiment of the present application is described.

[0041] In some embodiments, Figure 1 As shown, Figure 1 It is a bottom view of a partial structure of the photovoltaic system 100 (the photovoltaic support 160 is not shown in the figure). The photovoltaic system 100 includes: a frame 110, a photovoltaic laminate 120, a pressure sensor 130 and a non-elastic rope 140.

[0042] The photovoltaic laminate 120 is installed in the frame 110 ; the pressure sensor 130 is installed on the back side of the photovoltaic laminate 120 and abuts against the back side of the photovoltaic laminate 120 ; the inelastic rope 140 is tensioned and connected between the pressure sensor 130 and the frame 110 .

[0043] The photovoltaic laminate 120 and the frame 110 constitute a photovoltaic module. The photovoltaic laminate 120 can be in the shape of a plate, and the frame 110 can be in the shape of a closed frame, that is, the frame 110 can define an installation area, and the photovoltaic laminate 120 can be embedded in this installation area. Generally speaking, the side edges of the photovoltaic laminate 120 can correspond to and be connected to the side beams of the frame 110 one by one.

[0044] The connection method between the photovoltaic laminate 120 and the frame 110 may include, but is not limited to, bolt connection, snap connection, or pin connection, etc., which is not limited here.

[0045] For example, in some embodiments, the photovoltaic laminate 120 and the frame 110 are connected by bolts.

[0046] The pressure sensor 130 may be used to sense the pressure experienced by the photovoltaic laminate 120 .

[0047] It can be understood that the front side of the photovoltaic laminate is the sun-facing side, and the back side of the photovoltaic laminate is the backlit side. If the pressure sensor is installed on the front side of the photovoltaic laminate, based on the fact that the photovoltaic laminate is usually composed of multiple batteries connected in series or in parallel, the pressure sensor will inevitably block the battery corresponding to its position, causing its short-circuit current to be less than the operating current of the component. The blocked battery is in a reverse bias state, consuming the energy generated by other areas, causing local overheating. The above phenomenon is the hot spot phenomenon. Under the continuous influence of the hot spot phenomenon, the batteries in the photovoltaic laminate will experience current mismatch or even direct damage.

[0048] like Figure 1 As shown, the pressure sensor 130 can be installed in the middle of the backlight surface, which can better sense the pressure on the photovoltaic laminate 120 and reduce the generation of the above-mentioned hot spot effect.

[0049] The connection method between the pressure sensor 130 and the photovoltaic laminate 120 may include, but is not limited to, bolt connection, snap connection or bonding, etc., which is not limited here.

[0050] For example, in some embodiments, the connection between the pressure sensor 130 and the photovoltaic laminate 120 is adhesive bonding.

[0051] The inelastic rope 140 can be used to fix the pressure sensor 130 to provide support force. Since the K value of the inelastic rope 140 is very large, when the inelastic rope 140 is subjected to force, the deformation of the inelastic rope 140 is invisible. In other words, the deformation of the inelastic rope 140 can be ignored.

[0052] The non-elastic rope 140 may include a nylon rope or a steel wire rope, etc., which is not limited here.

[0053] For example, in some embodiments, the non-elastic rope 140 is a nylon rope.

[0054] In actual implementation, Figure 1-Figure 3As shown, when the photovoltaic system 100 is in clear weather, the pressure sensor 130 is pressed between the back side of the photovoltaic laminate 120 and the non-elastic rope 140. At this time, the pressure sensor 130 has an initial reading. When the photovoltaic system 100 is in heavy snow weather, during the snowfall, the front side of the photovoltaic laminate 120 will continuously accumulate snow, and the initial reading of the pressure sensor 130 will gradually increase. At this time, the heavy snow weather can be distinguished according to the rising reading, which is convenient for subsequent snow removal work; when the photovoltaic system 100 is in windy weather, due to the non-directional pressure exerted by the wind on the photovoltaic laminate 120, the initial reading of the pressure sensor 130 will sometimes increase and sometimes decrease. Specifically, when the photovoltaic laminate 120 is subjected to wind pressure, the initial reading will increase, and when the photovoltaic laminate 120 is lifted by the wind, the initial reading will decrease. At this time, the windy weather can be distinguished according to the reading that floats up and down, so as to avoid misjudgment.

[0055] The photovoltaic system 100 provided in the embodiment of the present application has high test sensitivity and good stability through the arrangement of the above-mentioned pressure sensor 130 and the inelastic rope 140, which helps to effectively remove snow and water accumulation. Combined with the structural design in which the pressure sensor 130 is arranged on the back of the photovoltaic laminate 120, it prevents the pressure sensor 130 from being arranged on the front of the photovoltaic laminate 120, which causes some batteries to be in a reverse bias state, thereby alleviating the negative effects caused by the hot spot effect and current mismatch, thereby reducing the maintenance frequency of the photovoltaic laminate 120. At the same time, the inelastic rope 140 is used to replace the common rigid structure to support the pressure sensor 130, thereby reducing the damage caused by the mutual squeezing of the pressure sensor 130 and the photovoltaic laminate 120, thereby extending the service life of the photovoltaic system 100.

[0056] In some embodiments, Figure 1-Figure 2 As shown, Figure 2 It is a top view of a partial structure of the photovoltaic system 100 . The frame 110 may include: a frame body 111 and a pressing block 112 .

[0057] The photovoltaic laminate 120 may be installed in the frame body 111 ; the pressing block 112 may be installed in the frame body 111 , and the inelastic rope 140 may be connected to the pressing block 112 .

[0058] In this embodiment, if Figure 1-Figure 3 As shown, the frame body 111 can be rectangular, and at least two side beams of the frame body 111 can be installed with a pressure block 112. For example, the pressure block 112 can be installed on two opposite side beams of the frame body 111. The photovoltaic system 100 can also include a photovoltaic bracket 160. The pressure block 112 can be fixedly connected to the photovoltaic bracket 160, and the frame body 111 can be installed on the photovoltaic bracket 160 through the pressure block 112.

[0059] The connection method between the pressing block 112 and the frame body 111 may include but is not limited to bolt connection, snap connection or welding, etc., which is not limited here.

[0060] For example, in some embodiments, the pressing block 112 and the frame body 111 are connected by bolts.

[0061] The connection method between the pressing block 112 and the photovoltaic support 160 may include, but is not limited to, bolt connection, snap connection or welding, etc., which is not limited here.

[0062] For example, in some embodiments, the connection between the pressing block 112 and the photovoltaic support 160 is a bolt connection.

[0063] The present application sets a pressure block 112 on at least two side beams of the frame body 111. The pressure block 112 is connected to the photovoltaic bracket 160. Compared with the frame body 111 being directly installed on the photovoltaic bracket 160, the bonding force between the frame body 111 and the photovoltaic bracket 160 is greatly increased, especially preventing the frame body 111 from being separated from the photovoltaic bracket 160 when the wind pressure is large.

[0064] In some embodiments, Figure 3 As shown, Figure 3 The vertical distance from the end of the inelastic rope 140 connected to the pressure sensor 130 to the photovoltaic laminate 120 may be greater than the vertical distance from the end of the inelastic rope 140 connected to the frame 110 to the photovoltaic laminate 120 .

[0065] In this embodiment, if Figure 3 As shown, the positions of the photovoltaic laminate 120 and the pressing block 112 are relatively fixed. After the inelastic rope 140 is assembled and tensioned, under the restraining effect of the inelastic rope 140, its tension can be decomposed into a force parallel to the photovoltaic laminate 120 and a pressure perpendicular to the photovoltaic laminate 120. The pressure perpendicular to the photovoltaic laminate 120 can force the pressure sensor 130 to tightly abut against the back of the photovoltaic laminate 120. When snow accumulates on the front of the photovoltaic laminate 120, the photovoltaic laminate 120 will be deformed under the pressure of the snow. This deformation will press the pressure sensor 130 backward. Based on the tension of the inelastic rope 140, the pressure sensor 130 is given enough supporting force. After being forced, it is difficult for the pressure sensor 130 to move backward, making the pressure sensor 130 more sensitive to changes in the pressure on the front of the photovoltaic laminate 120.

[0066] The photovoltaic system 100 provided in the embodiment of the present application is designed to provide sufficient support for the pressure sensor 130 by the direction of the tension applied by the non-elastic rope 140 to the pressure sensor 130, thereby preventing the pressure sensor 130 from being displaced due to force and causing inaccurate readings, thereby maximizing the sensitivity and accuracy of the pressure sensor 130, and further improving the accuracy of the photovoltaic system 100 in determining heavy snow and strong winds.

[0067] In some embodiments, Figure 1 and Figure 3 As shown, there may be a plurality of inelastic ropes 140 , and the extension directions of the inelastic ropes 140 may be different.

[0068] Here, multiple means two or more. For example, in some embodiments, Figure 1 and Figure 3 As shown, there may be two inelastic ropes 140, wherein the two inelastic ropes 140 intersect each other perpendicularly.

[0069] For example, in other embodiments, there may be two inelastic ropes 140 , wherein the two inelastic ropes 140 form an acute angle therebetween.

[0070] For example, in some other embodiments, the number of the inelastic ropes 140 may be four.

[0071] Multiple inelastic ropes 140 may intersect at the pressure sensor 130, and the two ends of each inelastic rope 140 may be connected to two sliders respectively, and the pressure sensor 130 is supported at a certain position in the middle of each inelastic rope 140, or the two ends of each inelastic rope 140 may be connected to the pressure sensor 130 and a slider respectively.

[0072] By configuring the above-mentioned multiple inelastic ropes 140, based on the different extension directions of each inelastic rope 140, the multiple inelastic ropes 140 can apply tension in multiple directions to the pressure sensor 130, thereby increasing the compression force on the pressure sensor 130 and making the pressure sensor 130 subject to balanced forces in at least two directions on a plane parallel to the photovoltaic laminate 120. Even if some of the inelastic ropes 140 become loose during long-term use, the accuracy of the pressure sensor 130 will not be affected.

[0073] In some embodiments, Figure 1 and Figure 3 As shown, a plurality of inelastic cords 140 may be connected to at least two sides of the frame 110 .

[0074] For example, in some embodiments, Figure 1 and Figure 3 As shown, a plurality of inelastic ropes 140 are connected to two sides of the frame 110 .

[0075] For example, in other embodiments, a plurality of inelastic ropes 140 are connected to three sides of the frame 110 .

[0076] For example, in yet other embodiments, the inelastic cord 140 has four sides.

[0077] By means of the structural design in which the multiple inelastic ropes 140 are connected to at least two sides of the frame 110, the stability and reliability of the connection between the inelastic ropes 140 and the frame 110 are increased. At the same time, compared with the unilateral connection solution, the probability of the pressure sensor 130 bending toward a single side of the frame 110 is reduced.

[0078] In some embodiments, Figure 1 and Figure 3 As shown, a plurality of inelastic cords 140 may be connected to at least a portion of the sides of the frame 110 .

[0079] For example, in some embodiments, Figure 1 and Figure 3 As shown, two sides of the frame 110 are connected with a plurality of inelastic ropes 140 .

[0080] For example, in some other embodiments, a side of the frame 110 is connected to a plurality of inelastic ropes 140 .

[0081] For example, in some other embodiments, four sides of the frame 110 are connected to a plurality of inelastic ropes 140 .

[0082] Through the structural design in which at least part of the edges of the above-mentioned frame 110 are connected to multiple inelastic ropes 140, on the basis of the multiple inelastic ropes 140 being connected to at least two edges of the frame 110, multiple fixations, multi-point fixations and multilateral fixations between the frame 110 and the multiple inelastic ropes 140 are achieved, thereby further improving the stability and reliability of the connection between the inelastic ropes 140 and the frame 110, thereby improving the accuracy retention of the pressure sensor 130.

[0083] In some embodiments, Figure 1 and Figure 3 As shown, a plurality of inelastic ropes 140 may be connected to two long sides of the frame 110 , and each long side may be connected to a plurality of inelastic ropes 140 .

[0084] In this embodiment, if Figure 1 and Figure 3As shown, the large surface of the photovoltaic laminate 120 can be rectangular. In other words, the photovoltaic laminate 120 can have two long sides and two short sides. The pressing blocks 112 can be arranged on the two long sides, and two pressing blocks 112 can be arranged on each long side. Each long side can be connected to two inelastic ropes 140. Specifically, the two ends of each inelastic rope 140 can be respectively connected to a certain pressing block 112 of the two long sides, and the two inelastic ropes 140 are not connected to the same pressing block 112.

[0085] In other embodiments, a plurality of inelastic ropes may be connected to two short sides of the frame 110 , and each short side may be connected to a plurality of inelastic ropes 140 .

[0086] The photovoltaic system 100 provided in the embodiment of the present application has a structural design in which the above-mentioned multiple inelastic ropes 140 are connected to the two long sides of the frame 110. Compared with the solution in which multiple inelastic ropes are connected to the two short sides of the frame 110, the length of each inelastic rope 140 is reduced, thereby saving manufacturing costs and reducing the probability of the inelastic rope 140 becoming loose.

[0087] In some embodiments, Figure 1 and Figure 3 As shown, the inelastic rope 140 may be tensionedly connected to two opposite sides of the frame 110 , and the pressure sensor 130 may be supported at the middle of the inelastic rope 140 .

[0088] In this embodiment, if Figure 1 and Figure 3 As shown, the two inelastic ropes 140 can be tensioned and connected to two opposite sides of the frame 110, the two inelastic ropes 140 can be arranged in an X-shape, and the two inelastic ropes 140 can form a symmetrical pattern. Specifically, the pressure sensor 130 can be supported at the center position of one of the inelastic ropes 140, and the pressure sensor 130 can be supported at the center position of the other inelastic rope 140. The center positions of the two inelastic ropes 140 coincide, and each rope can form an acute angle with the corresponding side connected to it, and the two ropes can be arranged in a mirror-symmetrical manner.

[0089] It should be noted that the pressure sensor 130 can be installed at any position on the back side of the photovoltaic laminate 120. Since the center position of the photovoltaic laminate 120 is usually occupied by the bus bar, it is preferred to install the pressure sensor 130 at the center position on the back side of the photovoltaic laminate 120.

[0090] The photovoltaic system 100 provided in the embodiment of the present application, through the design of the above-mentioned multiple non-elastic ropes 140 being arranged in a mirror-symmetrical manner, combined with the pressure sensor 130 being supported in the middle of the non-elastic rope 140, maximizes the balance of the force exerted on the pressure sensor 130 on the plane parallel to the photovoltaic laminate 120. In addition, in actual design, the center position of the back side of the photovoltaic laminate 120 can be selected as the installation position of the pressure sensor 130. In this way, the pressure sensor 130 will not block the batteries on the back side of the photovoltaic laminate 120 and thus produce hot spots.

[0091] In some embodiments, Figure 1-Figure 2 As shown, the upper surface of the frame 110 is higher than the upper surface of the photovoltaic laminate 120 to form a groove, and at least part of the side beams in the frame 110 may be provided with a water guide groove 1111 communicating with the groove.

[0092] It is understandable that the accumulated snow and water cannot flow down smoothly due to the existence of the groove, and the water guide groove 1111 can be used to discharge the accumulated snow and water in the groove.

[0093] like Figure 1-Figure 2 As shown, the large surface of the photovoltaic laminate 120 may be rectangular. In other words, the photovoltaic laminate 120 may have four sides, that is, the frame 110 may include four side beams, and the water guide groove 1111 may be provided in at least part of the four side beams.

[0094] For example, in some embodiments, Figure 1-Figure 2 As shown, one side beam in the frame 110 may be provided with a water guide groove 1111 communicating with the groove.

[0095] For example, in other embodiments, the two side beams in the frame 110 may be provided with a water guide groove 1111 connected to the groove.

[0096] For example, in some other embodiments, the four side beams in the frame 110 may be provided with water guide grooves 1111 connected to the grooves.

[0097] The photovoltaic system 100 provided in the embodiment of the present application realizes the discharge of snow and water hidden in the groove through the setting of the above-mentioned water guide groove 1111, and prevents the neutralization and adhesion of snow, water and other media on the surface of the photovoltaic laminate 120, thereby preventing the snow and water that are not discharged in time from causing a decrease in battery efficiency and even a negative feedback effect. At the same time, the use of this structure does not require drastic changes to the required materials, thereby realizing an economical and reliable anti-water accumulation design.

[0098] In some embodiments, Figure 1-Figure 2 As shown, the water channel 1111 can be disposed on the lower side beam of the frame 110 .

[0099] like Figure 3 As shown, the photovoltaic laminate 120 is usually arranged obliquely on the photovoltaic support 160, that is, the large surface of the photovoltaic laminate 120 is generally not placed horizontally in space.

[0100] by Figure 1-Figure 3 For example, the large surface of the photovoltaic laminate 120 can be rectangular. In other words, the frame 110 can include four side beams, namely an upper side beam, a lower side beam, a left beam and a right beam. The upper side beam and the lower side beam are arranged opposite to each other and can be fixed to the photovoltaic support 160 by a pressing block 112. The left beam and the right beam are arranged opposite to each other. Since the above-mentioned photovoltaic laminate 120 is usually arranged at an angle on the photovoltaic support 160, based on the effect of gravity, after the accumulated snow and water fall on the photovoltaic laminate 120, they will move toward the lower side beam. At this time, the accumulated snow and water that slide down to the groove defined by the lower side beam and the photovoltaic laminate 120 can be discharged through the water guide 1111 provided on the lower side beam.

[0101] The photovoltaic system 100 provided in the embodiment of the present application has a structural design in which the water guide groove 1111 is arranged on the lower side beam of the frame 110. Based on the effect of gravity, the accumulated snow and water will eventually converge into the groove defined by the lower side beam and the photovoltaic laminate 120. There is no need to add water guide grooves 1111 to other side beams except the lower side beam, thereby achieving an efficient and direct drainage method, reducing the corrosion of the entire frame 110 by snow and water accumulation during a long period of use, and at the same time accelerating the processing efficiency of the frame 110, thereby improving the production efficiency of the entire photovoltaic system 100.

[0102] In some embodiments, Figure 1-Figure 2 As shown, the lower side beam of the frame 110 may be provided with a plurality of water guide grooves 1111 that are spaced apart from each other.

[0103] Here, a plurality of means two or more than two, for example, in some embodiments, Figure 1-Figure 2 As shown, the lower side beam of the frame 110 may be provided with two water guide grooves 1111 that are spaced apart from each other.

[0104] The water guide groove 1111 may be in at least one of the following structural forms:

[0105] First, the perforation method on the inner side of the lower beam.

[0106] In this embodiment, the area where the lower beam is higher than the photovoltaic laminate 120 is provided with a perforation, and the bottom surface of the lower beam is also provided with a perforation. The accumulated snow and water can enter the interior of the lower beam from the groove through the perforations in the area where the lower beam is higher than the photovoltaic laminate 120, and finally be discharged through the perforations on the bottom surface of the lower beam.

[0107] Second, the lower beam is perforated up and down.

[0108] In this embodiment, if Figure 1-Figure 2 As shown, the top and bottom surfaces of the lower beam are provided with perforations, and accumulated snow and water can enter the lower beam from the groove through the perforations on the top surface of the lower beam, and finally be discharged through the perforations on the bottom surface of the lower beam.

[0109] The photovoltaic system 100 provided in the embodiment of the present application, through the arrangement of the above-mentioned multiple spaced-apart water guide grooves 1111, comprehensively improves the drainage efficiency of the photovoltaic system 100, prevents excessive snow and water accumulation from blocking the sun-facing surface of the photovoltaic laminate 120 for a long time, causing the hot spot effect to continue to deteriorate, reduces the probability of damage to the photovoltaic system 100, and provides a variety of grooving methods for the water guide grooves 1111 to choose from, thereby increasing the flexibility and diversity of the structural design of the photovoltaic system 100.

[0110] In some embodiments, Figure 1-Figure 3 As shown, the photovoltaic system 100 may further include a heater 150 .

[0111] The heater 150 may be mounted on a bottom rail of the frame 110 .

[0112] In actual implementation, the photovoltaic system 100 may also include a controller, which can be electrically connected to the heater 150 and the pressure sensor 130. When the photovoltaic system 100 is in heavy snow weather, during the snowfall, the front side of the photovoltaic laminate 120 will continue to accumulate snow, and the initial reading of the pressure sensor 130 will gradually increase. The pressure sensor 130 can feed the reading back to the controller, and the controller can determine that the climate is heavy snow weather based on the rising reading. The controller can control the heater 150 to start working, and the heater 150 can heat the snow near the lower beam. The snow near the lower beam melts into water and can be discharged through the water guide trough 1111. In this process, as the snow near the lower beam gradually melts, the snow above loses the supporting effect of the snow near the lower beam, and driven by gravity, the snow above also falls to the vicinity of the lower beam. The above-mentioned snow melting process continues until the reading of the pressure sensor 130 returns to the initial reading.

[0113] The photovoltaic system 100 provided in the embodiment of the present application cooperates with the controller and the pressure sensor 130 through the setting of the above-mentioned heater 150. The pressure sensor 130 senses the snow accumulation on the photovoltaic laminate 120 and adjusts the working state of the heater 150 according to the change in the reading, so as to quickly complete the snow removal work after snow accumulation on the photovoltaic laminate 120.

[0114] In some embodiments, Figure 1-Figure 3 As shown, the heater 150 may be located in the outboard and back regions of the rocker.

[0115] In this embodiment, if Figure 1-Figure 3As shown, the heater 150 may be attached to the outer side surface of the rocker and the bottom surface of the rocker to quickly melt the snow near the rocker.

[0116] In other embodiments, the heater 150 may be attached to the outer side of the rocker.

[0117] In yet other embodiments, the heater 150 may be attached to the back region of the rocker.

[0118] It is understandable that although the heater attached to the outer side, top and bottom surfaces of the lower beam at the same time can further accelerate the snow melting rate, the heater attached to the top surface of the lower beam will cause the depth of the groove to increase greatly. In other words, the volume of snow and water that the groove can accommodate is greatly increased.

[0119] When the heater 150 is located at the outer side and back area of ​​the bottom rail, based on the fact that the frame 110 is made of metal material with excellent thermal conductivity, heat can be quickly transferred from the bottom rail to the entire frame 110, thereby accelerating the snow melting rate as much as possible and reducing the residence time of snow on the photovoltaic laminate 120. At the same time, the risk of directly increasing the groove capacity when the heater 150 is located in the front area of ​​the bottom rail can be avoided.

[0120] In some embodiments, Figure 3 As shown, the upper surface of the heater 150 may not be higher than the upper surface of the rocker.

[0121] It is understandable that if the upper surface of the heater is higher than the upper surface of the lower beam, the height difference between the heater and the lower beam can form a groove, and dust, stagnant water, air pollutants and other media will accumulate in this groove, making it difficult to clean and accelerating the corrosion of the lower beam.

[0122] When the upper surface of the heater 150 is not higher than the upper surface of the lower side beam, accumulated water and snow can fall smoothly from there, and no groove will be formed at the connection between the heater 150 and the lower side beam, preventing dust, accumulated water, air pollutants and other media from accumulating at the connection between the heater 150 and the lower side beam, which is convenient for maintenance and reduces the corrosion of the lower side beam by dust, accumulated water, air pollutants and other media.

[0123] In some embodiments, Figure 3 As shown, the upper surface of the heater 150 and the surface of the heater 150 facing away from the bottom rail can be connected in an arc shape.

[0124] like Figure 3As shown, the upper end of the arc surface and the upper surface of the lower side beam are smoothly transitioned to facilitate the smooth sliding of the accumulated snow, and there is a certain height difference between the lower end of the arc surface and the back surface of the photovoltaic laminate 120 to form a dripping portion, blocking the accumulated water at this dripping portion to prevent the accumulated water from flowing to the back surface of the photovoltaic laminate 120

[0125] The front surface of the heater 150 is designed with an arc surface. This structure is beneficial to prevent water from accumulating after the snow melts, and allows the snow to flow downward without obstacles. The snow on the upper end can also move downward due to gravity, and all the snow can be gradually cleared.

[0126] In some embodiments, Figure 1-Figure 2 As shown, the lower side beam may be provided with a plurality of water guide grooves 1111 that are spaced apart from each other, and the heater 150 may be located between the plurality of water guide grooves 1111 .

[0127] Here, a plurality of means two or more than two, for example, in some embodiments, Figure 1-Figure 2 As shown, the lower side beam of the frame 110 may be provided with two water guide grooves 1111 that are spaced apart from each other.

[0128] like Figure 1-Figure 2 As shown, the heater 150 can be a long strip structure extending along the length direction of the lower side beam. In order to prevent the heater 150 from blocking the water guide groove 1111 when arranged, the length of the heater 150 should not exceed the water guide hole position on the back of the photovoltaic laminate 120, that is, multiple water guide grooves 1111 are arranged in the blank areas on both sides of the lower side beam where the heater 150 is not arranged.

[0129] By means of the position design of the water channel 1111 and the heater 150 , the mutual interference between the water channel 1111 and the heater 150 is reduced, the discharge speed of accumulated water and snow is accelerated, and the snow removal work of the entire photovoltaic system 100 is facilitated.

[0130] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0131] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0132] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0133] In the description of the present application, “plurality” means two or more.

[0134] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0135] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0136] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0137] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A photovoltaic system, characterized in that: include: frame; A photovoltaic laminate, wherein the photovoltaic laminate is installed in the frame; a pressure sensor mounted on the back side of the photovoltaic laminate and abutting against the back side of the photovoltaic laminate; A non-elastic rope is tensioned and connected between the pressure sensor and the frame.

2. The photovoltaic system according to claim 1, characterized in that: The frame includes: A frame body, wherein the photovoltaic laminate is installed in the frame body; A pressing block is installed on the frame body, and the inelastic rope is connected to the pressing block.

3. The photovoltaic system according to claim 1, characterized in that: The vertical distance from one end of the inelastic rope connected to the pressure sensor to the photovoltaic laminate is greater than the vertical distance from one end of the inelastic rope connected to the frame to the photovoltaic laminate.

4. The photovoltaic system according to claim 1, characterized in that: There are multiple inelastic ropes, and the extending directions of the inelastic ropes are different.

5. The photovoltaic system according to claim 4, characterized in that: A plurality of the inelastic ropes are connected to at least two sides of the frame.

6. The photovoltaic system according to claim 5, characterized in that: At least part of the sides of the frame are connected to a plurality of the inelastic ropes.

7. The photovoltaic system according to claim 5, characterized in that: A plurality of the inelastic ropes are connected to two long sides of the frame, and each of the long sides is connected to a plurality of the inelastic ropes.

8. The photovoltaic system according to claim 1, characterized in that: The inelastic rope is tensionedly connected to two opposite sides of the frame, and the pressure sensor is supported at the middle of the inelastic rope.

9. The photovoltaic system according to any one of claims 1 to 8, characterized in that: The upper surface of the frame is higher than the upper surface of the photovoltaic laminate to form a groove, and at least part of the side beams in the frame are provided with a water guide groove connected to the groove.

10. The photovoltaic system according to claim 9, characterized in that: The water guide groove is arranged on the lower side beam of the frame.

11. The photovoltaic system according to claim 10, characterized in that: The lower side beam of the frame is provided with a plurality of water guide grooves which are spaced apart from each other.

12. The photovoltaic system according to any one of claims 1 to 8, characterized in that: Also includes: A heater is installed on the lower side beam of the frame.

13. The photovoltaic system according to claim 12, characterized in that: The heater is located at the outer side and back regions of the rocker.

14. The photovoltaic system according to claim 12, characterized in that: The upper surface of the heater is not higher than the upper surface of the lower side rail.

15. The photovoltaic system according to claim 12, characterized in that: The upper surface of the heater and the surface of the heater facing away from the bottom rail are in a connected arc shape.

16. The photovoltaic system according to claim 12, characterized in that: The lower side beam is provided with a plurality of water guide grooves which are spaced apart and distributed, and the heater is located between the plurality of water guide grooves.

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