Snow baffle device and sloping roof photovoltaic power station

Abstract

The utility model discloses a snowboard device and a sloping roof photovoltaic power station, which belong to the field of photovoltaic technology. The snowboard device is arranged on a sloping roof and is positioned below a photovoltaic array in the longitudinal direction; the snow blocking plate device comprises a snow blocking shaft which extends in the transverse direction and is higher than the sloping roof, a plurality of snow blocking plates which are installed on the snow blocking shaft side by side in the transverse direction, and a snow blocking shaft driving mechanism which drives the snow blocking shaft to rotate. The snow blocking plate device has an opening state and a closing state, in the closing state, the space between the snow blocking plate and the sloping roof is closed, in the opening state, a snow discharging space is formed between the snow blocking plate and the sloping roof, accumulated snow sliding from the photovoltaic array is discharged through the snow discharging space, and when the snow blocking plate device is switched from the closing state to the opening state, the snow discharging space is opened. The snow blocking shaft driving mechanism drives the snow blocking shaft to rotate and drives the snow blocking plate to swing upwards so as to form a snow discharging space. The snow blocking device solves the problem that an existing snow blocking device cannot discharge snow in order.

Description

Technical field

[0001] The utility model belongs to the technical field of photovoltaic power generation equipment, and in particular relates to a photovoltaic power station installed on a roof. [Background Technology]

[0002] In the residential photovoltaic sector, components of a household photovoltaic system are installed on farmers' roofs at a vertical angle, ranging from 15 to 45 degrees. The greater the angle of the photovoltaic components, the greater the chance of snow sliding off during snowmelt. If large areas of snow slide from a height, they can easily cause significant damage to people and property.

[0003] To prevent shadows from affecting photovoltaic power generation efficiency, existing technology involves installing a snow barrier on the lowest component frame of a photovoltaic system. This device can slow down the speed of snowfall and divide large areas of snow into smaller pieces, minimizing damage caused by falling snow. For example, Chinese utility model patent publication number CN214506987U discloses a snow barrier for a photovoltaic module, comprising a first clamp and a second clamp for engaging with the frame of the photovoltaic module. The first clamp is provided with a U-shaped groove structure for engaging with the upper, outer, and lower walls of the frame, the U-shaped groove structure extending parallel to the lower wall; the second clamp cooperates with the protruding plate of the U-shaped groove structure to clamp the lower wall. The first clamp is provided with a partition plate for separating snow from the photovoltaic panels of the photovoltaic module, the partition plate being provided on the U-shaped groove structure.

[0004] For photovoltaic power stations installed on roofs, although the snow blocking devices in the prior art can break up and cushion the snow, they cannot be discharged in an orderly manner when the snow eventually slides over the eaves and falls. [Utility Model Content]

[0005] In view of the shortcomings of the existing technology, the technical problem to be solved by the present invention is to provide a roof photovoltaic power station and an anti-skiing system thereof, so as to solve the problem that the existing snow blocking device cannot achieve orderly snow removal.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] First, a snow guard device is provided, which is installed on a sloping roof and is located longitudinally below a photovoltaic array. The snow guard device includes a snow guard shaft extending laterally and higher than the sloping roof, a plurality of snow guards installed laterally side by side on the snow guard shaft, and a snow guard shaft driving mechanism for driving the snow guard shaft to rotate; the snow guard device has an open state and a closed state. In the closed state, the space between the snow guard and the sloping roof is closed. In the open state, a snow discharge space is formed between the snow guard and the sloping roof, and snow sliding down from the photovoltaic array is discharged through the snow discharge space. When switching from the closed state to the open state, the snow guard shaft driving mechanism drives the snow guard shaft to rotate and drives the snow guard to swing upward to form a snow discharge space.

[0008] Preferably, the snow-blocking shaft is rotatably supported on a snow-blocking support.

[0009] Preferably, the snow-blocking shaft driving mechanism includes a motor for driving the snow-blocking shaft to rotate.

[0010] Preferably, the snow-blocking shaft driving mechanism further includes a reducer, the motor shaft is connected to the input end of the reducer, and the output end of the reducer is connected to the snow-blocking shaft.

[0011] Preferably, the snow guard support includes an L-shaped component and a Z-shaped component, the L-shaped component has a bottom edge and a side edge, the bottom edge is installed on the water strip under the roof tile, and the side edge extends from the gap between two adjacent roof tiles, the Z-shaped component has a first fixed edge, a second fixed edge and a connecting edge, the first fixed edge is connected to the side edge, the connecting edge connects the first fixed edge and the second fixed edge, and the second fixed edge is connected to the snow guard shaft.

[0012] Preferably, a bearing seat is installed on the snow-blocking support, and the snow-blocking shaft is rotatably supported on the bearing seat.

[0013] Preferably, the snow guard is a sheet metal part.

[0014] Preferably, one end of the snow guard is provided with a bent portion, and the bent portion is fixed to the snow guard shaft by means of screws.

[0015] Preferably, a pressure sensor is installed on the snow guard. When the pressure sensor detects that the snow pressure is greater than a set value, the motor drives the snow guard shaft to rotate and adjust the angle of the snow guard.

[0016] The utility model also provides a photovoltaic power station on a sloping roof, comprising a photovoltaic array composed of a plurality of photovoltaic modules, and the snow guard device is installed on the sloping roof below the photovoltaic array in the longitudinal direction.

[0017] The utility model adopts the above technical solution, which has the following beneficial effects:

[0018] 1. Since the snow guards installed on the frames of photovoltaic modules have broken up and cushioned the falling snow, when the falling snow slides down from the photovoltaic array, the potential energy generated will cause the snow to continue sliding down. In order to discharge the falling snow in an orderly manner, a snow guard device is provided below the photovoltaic array in the longitudinal direction. The snow guard device has an open state and a closed state. In the closed state, the space between the snow guard and the sloping roof is closed. In the open state, a snow discharge space is formed between the snow guard and the sloping roof, and the snow sliding down from the photovoltaic array is discharged through the snow discharge space.

[0019] When switching from a closed state to an open state, the snow guard shaft drive mechanism drives the snow guard shaft to rotate and drives the snow guard to swing upward to form a snow discharge space. The upward swing angle of the snow guard can also be controlled according to the snow discharge requirements, thereby achieving orderly snow discharge.

[0020] 2. The motor drives the snow guard shaft to rotate through the reducer to reduce the speed and increase the torque, so as to realize the slow and smooth opening and closing of the snow guard device. Moreover, the motor can not only drive the snow guard shaft to rotate so that the snow guard device is fully opened, but also adjust the angle of the snow guard to realize the partial opening of the snow guard device, thereby controlling the orderly discharge of skis from under the snow guard.

[0021] 3. Since the snow-blocking support includes an L-shaped component and a Z-shaped component, the L-shaped component has a bottom edge and a side edge, wherein the bottom edge is installed on the water strip under the roof tile, and the side edge extends from the gap between two adjacent roof tiles, and the Z-shaped component has a first fixed edge, a second fixed edge and a connecting edge, the first fixed edge is connected to the side edge, the connecting edge connects the first fixed edge and the second fixed edge, and the second fixed edge is connected to the snow-blocking shaft. The above-mentioned snow-blocking support structure is designed for sloping roofs with roof tiles installed, so it is convenient to install on sloping roofs with roof tiles.

[0022] 4. Driven by the motor, the snow guard shaft can rotate smoothly relative to the snow guard support through the bearing seat.

[0023] 5. Since a pressure sensor is installed on the snow guard, it can detect situations where the snow pressure is high or there is a lot of snow accumulation, and snow needs to be discharged. When the pressure sensor installed on the snow guard detects that the snow pressure is high, that is, the snow pressure is greater than the set value, the alarm system is linked and a signal is sent to the motor controller. The motor rotates to drive the snow guard shaft to rotate, adjust the angle of the snow guard, and the snow can be discharged from under the snow guard.

[0024] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0025] The utility model is further described below with reference to the accompanying drawings:

[0026] Figure 1 This is a structural diagram of an anti-skiing system for a rooftop photovoltaic power station according to the present invention;

[0027] Figure 2 A schematic diagram of the structure in which one of the snow guards is installed between two longitudinally adjacent photovoltaic modules;

[0028] Figure 3 This is a schematic diagram of the structure of one of the snow blocking clamps;

[0029] Figure 4 This is a schematic diagram of the structure of a conventional photovoltaic module frame;

[0030] Figure 5 This is a schematic diagram of the structure of a snow blocking fixture with a dust guiding function;

[0031] Figure 6 This is a schematic diagram of the structure of another snow shield with dust-guiding function. Figure 1 ;

[0032] Figure 7 This is a schematic diagram of the structure of another snow shield with dust-guiding function. Figure 2 ;

[0033] Figure 8 This is a schematic diagram of the structure of another snow shield with dust-guiding function. Figure 3 ;

[0034] Figure 9 This is a schematic diagram of the installation structure of a reinforced fixed snow blocking fixture;

[0035] Figure 10 A schematic diagram of the structure of the strengthening fixings;

[0036] Figure 11 A schematic diagram of another structure of a snow-blocking fixture installed on the frame of a photovoltaic module on the lower longitudinal side;

[0037] Figure 12 It is a structural diagram of another snow blocking clamp;

[0038] Figure 13 A schematic diagram of the installation position of one type of snow guard device;

[0039] Figure 14 This is a structural diagram of the snow shield support;

[0040] Figure 15 is a schematic diagram of the structure of a snow guard;

[0041] Figures: photovoltaic module 100, A surface 101, B surface 102, C surface 103, mounting groove 104, hollow cavity 105, extended edge 106; snow blocking clamp 1, snow blocking portion 11, snow blocking surface 111, upper convex arc surface 1111, outer convex arc surface 1112, vertical edge 1113, snow guiding surface 112, bottom plate 113, upper pressing edge 1131, opening 1132, first protrusion 1133, spacing space 1134, horizontal dust guiding channel 1135, dust guiding edge 114, serrated structure 1141, cavity 115, separating rib 116, buckle portion 12, clamping foot 121, vertical edge 1211, lower clamping edge 1212, second protrusion 1213, locking spring 122, oblique section 1221, bent edge 1222, reinforcing rib 123, limiting clamping edge 124, reinforcing fixing member 13, bottom edge 131, first side edge 132, second side edge 133, fixing spring 134, snow guard device 2, snow guard shaft 21, snow guard 22, bent portion 221, motor 23, snow guard support 24, L-shaped component 241, Z-shaped component 242; house 3, sloping roof 31. [Specific implementation method]

[0042] The following is an explanation and description of the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0043] Those skilled in the art will appreciate that, unless there is any conflict, the features in the following embodiments and implementations may be combined with each other.

[0044] The terms used in this utility model are for the purpose of describing specific embodiments only and are not intended to limit the utility model. For example, the terms "upper," "lower," "horizontal," and "vertical" used below to indicate orientation or positional relationships are based solely on the orientation or positional relationships shown in the accompanying drawings and are used solely to facilitate the description of the utility model and simplify the description. They do not indicate or imply that the device or element referred to must have a specific orientation or be constructed or operated in a specific orientation. Therefore, they should not be construed as limiting the utility model.

[0045] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0046] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0047] Referring to the prior art, the photovoltaic module is rectangular and has rectangular frames around it, such as Figure 4 As shown, the conventional frame has an A surface 101, a B surface 102 and a C surface 103, wherein the lower side of the A surface is provided with a mounting groove 104 for mounting a photovoltaic panel, the inner side of the B surface is provided with a hollow cavity 105, wherein the C surface 103 extends toward the inside of the photovoltaic component to form an extended edge 106.

[0048] In a photovoltaic system, several photovoltaic modules can be arranged in a rectangular array, or only a single photovoltaic module can be provided. However, from an economic perspective, a photovoltaic array is usually provided, and the present invention is also described in terms of the photovoltaic array. For a rooftop photovoltaic power station, it is installed on the roof of a house. The present invention is described by taking the installation on the sloping roof 31 of a house 3 as an example. The sloping roof 31 here can be a single south-facing sloping roof, a north-south sloping roof, or a smaller east-west sloping roof. It can be a naturally formed sloping roof on the roof of a house, or a sloping roof formed later after renovation for the installation of a photovoltaic power station. The north-south sloping roof is used as an example for description.

[0049] The snow guard device in the prior art is installed on the front frame of the photovoltaic module at the longitudinal front end of the photovoltaic array (close to the lower edge of the sloping roof). Since the photovoltaic module is tilted, the skis slide from top to bottom, so it can also be said to be installed on the lower frame of the photovoltaic module.

[0050] Reference Figures 1 to 15As shown, this embodiment provides a rooftop photovoltaic power station anti-skid system. A plurality of photovoltaic modules 100 are arranged in an array on a sloping roof 31. Because the photovoltaic modules are tilted, snow slides longitudinally. Therefore, a snow guard 1 is installed between two longitudinally adjacent photovoltaic modules 100. In addition, a snow guard device 2 is installed longitudinally below the photovoltaic array.

[0051] In order to install the snow-blocking clamp and realize the snow-blocking function, the snow-blocking clamp 1 includes a snow-blocking portion 11 and a snap-on portion 12. The snow-blocking portion 11 is higher than the frame A surface 101 of the photovoltaic module. The snap-on portion 12 is snap-fitted and fixed between the frames of two longitudinally adjacent photovoltaic modules. The photovoltaic module located on the upper side in the longitudinal direction is called the first longitudinally adjacent photovoltaic module, and the photovoltaic module located on the lower side in the longitudinal direction is called the second longitudinally adjacent photovoltaic module.

[0052] The snow guard clamp features a snow guard portion that extends above the frame's A surface, blocking and dividing any snow that slides past, providing a buffering effect. Furthermore, the clip secures the snow guard clamp, preventing it from falling due to the impact of accumulated snow, eliminating the need for additional fasteners. Furthermore, due to the narrow gap between adjacent photovoltaic panels, installing the snow guard clamp using other fastening structures is difficult. Using the clip facilitates quick installation.

[0053] Because snow guards are installed between two adjacent photovoltaic modules in the vertical direction, multiple snow guards can be installed in the anti-skid system of the entire roof photovoltaic power station, forming a multi-point distribution structure of snow guards. For example, at least one snow guard is installed on the longitudinal lower frame of each photovoltaic module, thereby forming not only a structure with multiple snow guards arranged horizontally, but also a structure with multiple snow guards arranged vertically. As a result, multiple snow guards are arranged in a stepped manner along the longitudinal direction, acting as a stepped buffer, thereby improving the snow-blocking and buffering effect. In this way, all snow guards can be arranged in a rectangular array, with multiple snow-blocking points forming a snow-blocking grid. After the sliding snow passes through the multiple snow guards, it not only becomes smaller in volume and eventually completely shatters, but also the stepped buffering reduces the impact force, minimizing the damage caused by the sliding snow.

[0054] It can be understood that all snow guards can be arranged in a regular rectangular array, or they can be arranged in an irregular array, that is, the lateral position of the snow guards between two longitudinally adjacent photovoltaic modules can be changed, and multiple snow guards arranged longitudinally can also be staggered in the transverse direction.

[0055] As one embodiment, the snap portion 12 includes an L-shaped foot 121, which includes a vertical side 1211 and a lower edge 1212 connected to the bottom of the vertical side. A slot is formed between the foot 121 and the snow guard portion to engage with the frame of the first photovoltaic module adjacent in the longitudinal direction. The upper side wall of the slot engages with the A side of the frame, and the lower side wall of the slot (i.e., the lower edge) engages with the C side of the frame, so that the slot clamps the frame, so that the snow guard is firmly fixed to the frame of the first photovoltaic module adjacent in the longitudinal direction. The length of the lower edge 1212 extending inwardly toward the C side of the frame does not need to extend all the way below the extended edge 106.

[0056] Furthermore, the latch portion 12 also includes a snap-on spring 122 extending outward from the side of the vertical edge opposite the bottom edge. The snap-on spring 122 elastically abuts against the frame B surface of the second longitudinally adjacent photovoltaic module. The extension distance between the lower snap-on edge 1212 and the snap-on spring 122 is greater than the gap between the two adjacent photovoltaic modules. Thus, when installing the snow guard, the snow guard is inserted into the gap between the two longitudinally adjacent photovoltaic modules. The snap-on spring 122 abuts against the frame B surface of the second longitudinally adjacent photovoltaic module, deforming to ensure that the lower snap-on edge 1212 can extend into the gap between the two longitudinally adjacent photovoltaic modules. Once the lower snap-on edge 1212 reaches below the frame C surface of the first longitudinally adjacent photovoltaic module, the snow guard is pushed upward along the longitudinal direction, so that the lower snap-on edge 1212 abuts against the C surface, completing the installation of the snow guard. When subjected to force, such as when skiing, the snow guard's snap-on spring 122 contacts the frame B of the second longitudinally adjacent photovoltaic module, generating an upward, oblique reaction force that prevents the snap-on slot from separating from the frame of the first longitudinally adjacent photovoltaic module. Consequently, the snow guard will not fall out from between the two adjacent photovoltaic modules. Even if the snap-on spring fails, the vertical edge 1211 will adhere to the frame B of the second longitudinally adjacent photovoltaic module under the downward force, preventing the snow guard from falling out.

[0057] Specifically, the engaging spring 122 includes an upwardly extending oblique segment 1221 and a bent edge 1222 connected to the end of the oblique segment. The bent edge 1222 elastically abuts against the frame B surface of the second longitudinally adjacent photovoltaic module. The oblique segment extends upward to facilitate top-down installation of the snow guard. The oblique design also facilitates the generation of a greater elastic force. The bent edge creates a larger contact area with the frame B surface of the second longitudinally adjacent photovoltaic module, thereby effectively enabling the engaging spring to function.

[0058] Preferably, the snow blocking part 11 is provided with a snow blocking surface 111 extending in an arc or obliquely along the longitudinal direction, and a snow guiding surface 112 provided on the side opposite to the snow blocking surface. The snow blocking part functions to block the snow and slow down the sliding speed of the snow, and the snow blocking surface extends in an arc or obliquely to face the snow sliding upwards, so that the snow is brought greater resistance and the normal sliding of the snow is not affected. The snow guiding surface is to guide the snow to slide normally and not to accumulate in the snow blocking clamp. Of course, the shapes of the snow blocking surface and the snow guiding surface can be changed to correspondingly play the good snow blocking and guiding functions.

[0059] It can be understood that the height of the snow blocking part is calculated according to the shadow, and when the shadow is the longest on the winter solstice day, the shadow just does not block the photovoltaic module, so that the snow blocking clamp does not affect the photovoltaic power generation.

[0060] Further, the bottom of the snow blocking part 11 is provided with a bottom plate 113, the upper end of the buckle part 12 is connected to the longitudinal middle position of the bottom plate, and the longitudinal two sides of the bottom plate 113 are correspondingly provided with upper pressing edges 1131 pressed on the frame A surfaces of the two adjacent photovoltaic modules in the longitudinal direction. The upper pressing edges cooperate with the buckle part to ensure that the snow blocking clamp is reliably fixed in the gap between the two adjacent photovoltaic modules in the longitudinal direction, one of the upper pressing edges cooperates with the clamping leg to form a clamping groove and is clamped with the frame of the first photovoltaic module in the longitudinal direction, and the other upper pressing edge cooperates with the clamping spring to be clamped with the frame of the second photovoltaic module in the longitudinal direction. When the clamping spring fails, not only the vertical edge will be attached to the frame B surface of the second photovoltaic module in the longitudinal direction under the action of force, but also the upper pressing edge will be attached to the frame A surface of the lower photovoltaic module under the action of force. Therefore, under the action of the downward force, the vertical edge and the upper pressing edge are fixed with the frame of the second photovoltaic module in the longitudinal direction, so as to prevent the snow blocking clamp from being pulled out.

[0061] Preferably, the snow blocking clamp 1 is made of stainless steel or aluminum alloy profile. The profile is formed by extrusion, which can realize industrialized production, significantly reduce the cost, and has high strength, is not easy to rust, and has long service life. Moreover, the whole body has a certain elasticity, which is convenient for installation between the two adjacent photovoltaic modules in the longitudinal direction.

[0062] Further, the snow blocking part 11 is provided with a cavity 115 above the bottom plate 113. The cavity 115 is formed by the bottom plate 113, the snow blocking surface 111 and the snow guiding surface 112, and the wall thicknesses of the snow blocking surface 111 and the snow guiding surface 112 are substantially consistent. Figure 3 and Figure 6 As shown in the figures, the shape of the cavity 115 will change correspondingly according to the change of the shapes of the snow blocking surface 111 and the snow guiding surface 112. In addition, a partition rib 116 can be added in the cavity to divide a plurality of small cavities, so as to not only save materials, but also increase the structural strength of the snow blocking part, thereby increasing the impact resistance of the snow blocking part.

[0063] In addition, if Figure 3 As shown, the buckle portion 12 is provided with a reinforcing rib 123 connected to the bottom plate 113, and a cavity is formed between the reinforcing rib, the bottom plate 113 and the vertical edge 1211. The reinforcing rib enhances the overall structural strength of the snow guard clamp and prevents the connection between the snow guard portion and the buckle from being broken when snow slides down quickly.

[0064] Of course, it is understandable that the structures of the above-mentioned snow shield and buckle parts can also be modified in other ways. Only some of the modifications are described below.

[0065] As one of the implementation methods, a snow-blocking clamp can also be installed on the frame of the photovoltaic module on the lower longitudinal side. In this way, compared with installing the snow-blocking clamp only between two adjacent photovoltaic modules in the longitudinal direction, it is equivalent to adding a snow-blocking clamp, which further improves the snow-blocking and buffering effect. However, since there are no other photovoltaic modules below in the longitudinal direction, the above-mentioned snow-blocking clamp is easy to separate from the frame. In order to ensure that the snow-blocking clamp is fixed reliably, a corresponding snow-blocking clamp installation structure with enhanced fixation is also designed, that is, a reinforced fixing part 13 is added. In this way, while the buckle part 12 is engaged and fixed with the frame, the reinforced fixing part 13 can reinforce the fixation of the buckle part 12 with the frame. In this way, the fixing structure of the snow-blocking clamp and the frame is strengthened, the snow-blocking clamp is not easily separated from the frame, and the snow-blocking clamp and the frame are ensured to be reliably fixed.

[0066] Specifically, the reinforcing fixture 13 features a U-shaped clip that secures the snap portion 12 to the frame. The U-shaped clip includes a bottom edge 131, a first side edge 132, and a second side edge 133 located on opposite sides of the bottom edge. A securing spring 134 extends below the second side edge 133. The first side edge 132 engages the C-side edge of the frame, while the securing spring 134 elastically engages the other side of the vertical edge. The securing spring generates sufficient snapping force to secure the snap portion 12 to the frame. The U-shaped design of the reinforcing fixture also facilitates installation, eliminating the need for additional fasteners.

[0067] Of course, it is understandable that the reinforcing fixing member may also be glue or screws.

[0068] In addition, in the case of installing a snow blocking clamp on the frame of the photovoltaic module on the lower longitudinal side, the structure of the snow blocking clamp can also be improved accordingly, mainly the structure of the buckle part is improved, such as Figure 11 and Figure 12As shown, the lower clamping edge is extended to extend inwardly of the C-surface of the frame. The buckle portion 12 is further provided with a limit clamping edge 124 that folds upward from the edge of the lower clamping edge. The limit clamping edge 124 is used to tightly engage the edge of the C-surface. The limit clamping edge is used to prevent the snow guard from sliding longitudinally to prevent separation from the C-surface of the frame. In combination with the structure of the reinforced fixing member, the first side edge 132 engages with the limit clamping edge 124, and the fixing spring 134 engages with the other side of the vertical edge, thereby reliably fixing the buckle portion to the component frame.

[0069] In addition, the relative positions of the engaging springs can also be changed, such as Figure 11 and Figure 12 As shown, the engaging spring piece 122 is disposed on the same side as the bottom edge 1212, and the engaging spring piece 122 elastically abuts against the frame surface B. Thus, after the snow guard is installed, the engaging spring piece acts to clamp the limiting clamping edge 124 against the edge of the C surface, and simultaneously cooperates with the upper pressing edge to clamp the snow guard and the frame in multiple directions. After the reinforcing fixture is installed, the engaging spring piece cooperates with the reinforcing fixture to achieve dual clamping of the snow guard and the frame, thereby ensuring reliable fixation.

[0070] Dust on the surface of photovoltaic modules affects their efficiency in absorbing sunlight, so they are usually cleaned regularly. Rainwater also has a cleaning effect. However, due to the tilted arrangement of photovoltaic modules, dust, rainwater, or mixed sewage can accumulate at the bottom of the module, blocking the module from receiving sunlight. Therefore, dust troughs are typically installed on the bottom of the module frame to guide both water and dust. However, in existing technology, dust troughs and snow guards are designed and installed separately, increasing the overall cost of the photovoltaic system.

[0071] In order to make the snow blocking clamp have the dust guiding function, the snow blocking clamp is increased with a dust guiding structure to form a snow blocking clamp with a dust guiding function. One implementation method is as follows: Figure 5 As shown, a dust guide structure is provided between the snow guard clamp 1 and the frame of the photovoltaic module. Corresponding to the snow guard clamp structure with the snow guard portion 11 and the buckle portion 12, the clamping groove is provided with a dust guide structure for receiving dust, sewage, etc. entering from the surface of the photovoltaic module and then discharging them.

[0072] Specifically, the dust guide structure includes a longitudinal dust guide channel provided between the upper side wall of the card slot and the frame surface A. The edge of the upper side wall of the card slot is provided with a dust guide edge 114. The dust guide edge 114 extends beyond the inner side of the frame surface A and forms a dust guide inlet between the surface of the photovoltaic module. The dust guide inlet is connected to the longitudinal dust guide channel. A transverse dust guide channel is provided between the outer side wall of the card slot and the frame surface B. The dust guide inlet, the longitudinal dust guide channel, and the transverse dust guide channel form a complete dust guide channel, wherein the dust guide inlet can guide dust and water from the dust guide inlet, and then flow along the longitudinal dust guide channel and the transverse dust guide channel in sequence, and finally be discharged, thereby realizing the water and dust guide functions. This expands the function of the snow guard clamp, realizes multiple uses of one item, and achieves the purpose of saving the overall cost of the photovoltaic system.

[0073] The dust guide edge 114 extends obliquely downward toward the surface of the photovoltaic module and is provided with a serrated structure 1141. This forms multiple small-sized dust guide inlets, which facilitates the introduction of dust and water from the dust guide inlets. It also serves as an extension of the upper pressure edge, improving the reliability of the engagement between the card slot and the frame.

[0074] In addition, the upper sidewall of the slot is provided with first protrusions 1133 spaced laterally, and a longitudinal dust guide channel is formed between two adjacent first protrusions 1133. The upper sidewall of the slot is provided with an opening 1132 between adjacent first protrusions 1133. Some water and dust can also enter the longitudinal dust guide channel through the opening. A space 1134 is provided between the first protrusions 1133 and the front sidewall of the slot, allowing the longitudinal dust guide channel to extend longitudinally and communicate with the space. The front sidewall of the slot is provided with a second protrusion 1213 extending laterally, forming a transverse dust guide channel 1135 between the front sidewall of the slot and side B of the frame. The transverse dust guide channel communicates with the longitudinal dust guide channel through the space. The second protrusion 1213 is positioned adjacent to the lower clamping edge, so that the transverse dust guide channel is located on the upper side and communicates with the space above. Since the transverse dust guide channel is connected at both ends, dust and water can ultimately be discharged from the snow guard.

[0075] Another embodiment of the snow blocking fixture with dust guiding function is as follows Figures 6 to 8 As shown, the structure of the snow guard is Figure 5 Different from the ones shown, Figure 5 In the figure, the snow blocking surface 111 is a convex arc surface, the snow guiding surface 112 is an inclined surface, and Figures 6 to 8 In the figure, the snow blocking surface 111 includes a middle convex arc surface 1112, an upper convex arc surface 1111 at the upper end, and a vertical side 1113 at the lower end, wherein the upper end of the vertical side is higher than the lower end of the convex arc surface 1112.

[0076] Of course, other structures of the snow guard clamp can also be modified in many ways, which will not be described in detail here.

[0077] refer to Figure 9 As shown, although a reinforcing fixing member 13 is added, the structure of the snow blocking clamp remains unchanged and a dust guiding structure can still be provided.

[0078] refer to Figure 11 and Figure 12 As shown in the figure, the snow guard clamp 1 also has a dust guide structure, but the structure of the transverse dust guide channel has been changed, wherein the engaging spring piece 122 elastically abuts against the frame B surface to form a transverse dust guide channel.

[0079] It is understandable that a snow-blocking clamp can be installed in the horizontal middle position of the lower side of the photovoltaic module frame, or a snow-blocking clamp can be installed near the horizontal end position of the lower side of the photovoltaic module frame. Of course, according to actual needs, multiple snow-blocking clamps can be set along the horizontal side of the lower side of the photovoltaic module frame to effectively divide large pieces of snow into multiple small pieces of snow, so as to effectively reduce the impact force of the snow sliding down.

[0080] As one of the implementation methods, refer to Figure 13 and Figure 15 As shown, the snow guard device 2 comprises a snow guard shaft 21 extending laterally and higher than the sloping roof, and a plurality of snow guards 22 mounted laterally side by side on the snow guard shaft 21. The snow guard device has an open and closed state. In the closed state, the space between the snow guards 22 and the sloping roof is sealed. In the open state, the snow guard shaft 21 drives the snow guards 22 to move, creating a snow-draining space between the snow guards and the sloping roof. Snow that slides off the photovoltaic array is discharged through the snow-draining space.

[0081] The aforementioned snow guard device is used in conjunction with the snow guard fixture installed on the photovoltaic array. Because the snow guard fixture has already broken up and cushioned the falling snow, not only is its volume reduced, but the impact force is also reduced after the step-by-step cushioning. When the falling snow slides off the photovoltaic array, the potential energy generated will cause the snow to continue sliding down. To ensure the orderly discharge of the falling snow, a snow guard device is installed longitudinally below the photovoltaic array. The snow guard device has an open state and a closed state. In the closed state, the space between the snow guard and the sloping roof is closed. In the open state, a snow discharge space is formed between the snow guard and the sloping roof, and the snow that slides off the photovoltaic array is discharged through the snow discharge space. Because the snow guard device achieves orderly snow discharge, the impact force is reduced during the snow discharge process, and it also has a certain snow crushing effect.

[0082] Therefore, the cooperation between the snow guard device and the snow guard clamp can not only break and cushion the skis, but also make the skis discharged in an orderly manner, avoiding the disorderly sliding of snow, thereby reducing the range of snow impacting the ground, reducing the threat of snow impact to temporary buildings and the lives and property of passers-by, and completely solving the safety risk problem caused by large pieces of snow sliding on the surface of photovoltaic modules.

[0083] Furthermore, to enable the snow guard device to open and close, the snow guard device 2 also includes a snow guard shaft drive mechanism that rotates the snow guard shaft to achieve closing and opening. The snow guard shaft 21 is rotatably supported on a snow guard support 24. The snow guard shaft drive mechanism includes a motor 23 that drives the snow guard shaft 21 and a reducer. The motor shaft is connected to the input of the reducer, and the output of the reducer is connected to the snow guard shaft. A reducer is typically required to reduce speed and increase torque, enabling slow and smooth opening and closing of the snow guard device. However, a motor and reducer can also be integrated, i.e., a reduction motor.

[0084] It is understandable that the snow-blocking shaft driving mechanism can be provided at one end of the snow-blocking shaft, or the snow-blocking shaft can be provided in sections and the snow-blocking shaft driving mechanism can be provided in sections.

[0085] It is understandable that the motor can not only drive the snow guard shaft to rotate so that the snow guard device is fully opened, but also adjust the angle of the snow guard to achieve partial opening of the snow guard device, thereby controlling the orderly discharge of skis from under the snow guard.

[0086] It is understood that a pressure sensor or other type of sensor could be installed on the snow guard, or elsewhere, to detect high snow pressure or accumulation, indicating the need for snow removal. When the pressure sensor on the snow guard detects high snow pressure (i.e., snow pressure exceeding a set value), an alarm system is activated and a signal is transmitted to the motor controller. The motor rotates, driving the snow guard shaft, adjusting the angle of the snow guard so that snow can be discharged from underneath the snow guard. The control system can also be switched to manual mode, manually controlling the motor's rotation angle to adjust the snow guard's angle accordingly.

[0087] The snow guard support 24 comprises an L-shaped component 241 and a Z-shaped component 242. The L-shaped component has a bottom edge and side edges. The bottom edge is mounted on the water-repellent strip below the roof tiles, while the side edges extend from the gap between adjacent roof tiles. The Z-shaped component has a first fixed edge, a second fixed edge, and a connecting edge. The first fixed edge is connected to the side edge, the connecting edge connects the first and second fixed edges, and the second fixed edge is connected to the snow guard shaft. Because the structure of the snow guard support 24 is designed for sloping roofs equipped with roof tiles, it is easy to install on sloping roofs covered with roof tiles.

[0088] Furthermore, a bearing seat is installed on the snow-blocking support 24, and the snow-blocking shaft 21 is rotatably supported on the bearing seat, so that the snow-blocking shaft can rotate smoothly.

[0089] It is understood that multiple snow shield supports can be arranged at intervals along the horizontal direction to support the snow shield shaft, for example, one snow shield support can be arranged at intervals of the width of a photovoltaic module. Since the snow shield shaft 21 is rotatably supported on the bearing seat, the snow shield shaft can rotate smoothly relative to the snow shield support under the drive of the motor.

[0090] Preferably, the snow guard 22 is a sheet metal component, with a bent portion 221 at one end. The bent portion 221 is secured to the snow guard shaft using screws, for example, self-tapping screws, bolts, or rivets. Sheet metal components offer advantages such as light weight, high strength, low cost, and good mass production performance. Specifically, they can be made of stainless steel.

[0091] It is understandable that the snow guard shaft 21 can be an integral major axis or can be formed by combining multiple minor axes. The size of the snow guard, including length and width, can be selected as needed, and the gap between adjacent two snow guards can also be varied.

[0092] The above description is merely a specific embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. Those skilled in the art will understand that the utility model includes, but is not limited to, the contents described in the drawings and the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the utility model are intended to be included within the scope of the claims.

Claims

1. A snow guard device installed on a sloping roof and located longitudinally below a photovoltaic array, characterized in that: The snow guard device includes a snow guard shaft extending laterally and higher than the sloping roof, a plurality of snow guards installed side by side on the snow guard shaft laterally, and a snow guard shaft driving mechanism for driving the snow guard shaft to rotate; the snow guard device has an open state and a closed state. In the closed state, the space between the snow guard and the sloping roof is closed. In the open state, a snow discharge space is formed between the snow guard and the sloping roof, and the accumulated snow sliding down from the photovoltaic array is discharged through the snow discharge space. When switching from the closed state to the open state, the snow guard shaft driving mechanism drives the snow guard shaft to rotate and drives the snow guard to swing upward to form a snow discharge space.

2. A snowboard device according to claim 1, characterized in that: The snow blocking shaft is rotatably supported on the snow blocking support.

3. A snowboard device according to claim 2, characterized in that: The snow-blocking shaft driving mechanism includes a motor for driving the snow-blocking shaft to rotate.

4. A snowboard device according to claim 3, characterized in that: The snow-blocking shaft driving mechanism further includes a reducer, the motor shaft is connected to the input end of the reducer, and the output end of the reducer is connected to the snow-blocking shaft.

5. A snowboard device according to claim 2, characterized in that: The snow guard support includes an L-shaped component and a Z-shaped component. The L-shaped component has a bottom edge and a side edge. The bottom edge is installed on the water strip under the roof tile, and the side edge extends from the gap between two adjacent roof tiles. The Z-shaped component has a first fixed edge, a second fixed edge and a connecting edge. The first fixed edge is connected to the side edge, the connecting edge connects the first fixed edge and the second fixed edge, and the second fixed edge is connected to the snow guard shaft.

6. A snowboard device according to claim 2, characterized in that: A bearing seat is installed on the snow-blocking support, and the snow-blocking shaft is rotatably supported on the bearing seat.

7. A snowboard device according to claim 2, characterized in that: The snow guard is a sheet metal part.

8. A snowboard device according to claim 7, characterized in that: One end of the snow guard is provided with a bent portion, and the bent portion is fixed on the snow guard shaft by using screws.

9. The snow guard device according to claim 3, characterized in that: A pressure sensor is installed on the snow guard. When the pressure sensor detects that the snow pressure is greater than a set value, the motor drives the snow guard shaft to rotate and adjust the angle of the snow guard.

10. A photovoltaic power station on a sloping roof, comprising a photovoltaic array composed of a plurality of photovoltaic modules, characterized in that: The sloping roof is provided with a snow guard device according to any one of claims 1 to 9 installed longitudinally below the photovoltaic array.

Images