A photovoltaic power generation device capable of automatically tracking sunlight

Abstract

The present invention provides a photovoltaic power generation device that can automatically track sunlight, including: a photovoltaic panel assembly, a sun detection device, an axial tracking adjustment device, a radial tracking adjustment device, a base, an electric control box and a hydraulic station; the sun detection device is arranged on the photovoltaic panel assembly; the axial tracking adjustment device and the radial tracking adjustment device are both connected to the photovoltaic panel assembly, and the radial tracking adjustment device is connected to the axial tracking adjustment device; the base is connected to the radial tracking adjustment device; the electric control box is electrically connected to the sun detection device and is arranged on the base; the hydraulic station is arranged on the base to provide power oil for the axial tracking adjustment device and the radial tracking adjustment device. The present invention can maximize the use of solar energy, improve the power generation efficiency of solar photovoltaic panels, and can be used normally under various terrains and climatic conditions, and can withstand extreme tests.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic equipment, and in particular to a photovoltaic power generation device capable of automatically tracking sunlight. Background Art

[0002] With the rapid development of society and economy, the demand for energy is increasing day by day. The depletion of fossil energy and the pollution to the ecological environment seriously threaten the sustainable development of society and economy. Therefore, it is imperative to vigorously develop non-fossil and renewable energy power generation. As an inexhaustible green renewable energy, solar energy has received widespread attention worldwide. As an important way to utilize solar energy, solar photovoltaic power generation has a very broad development prospect and has become an important way to solve the global energy crisis in the future.

[0003] At present, solar photovoltaic power generation systems generally adopt the fixed azimuth installation method of solar photovoltaic panel racks. The light-receiving surface of the solar photovoltaic panel can output a large power only in a short period of time during the whole day's illumination time. In most of the time period, since sunlight cannot directly shine on the plane of the solar photovoltaic panel, the utilization rate of the solar photovoltaic cell is low. In this installation method, in order to obtain a certain power output, it can only be achieved by increasing the area and number of solar photovoltaic panels. Summary of the invention

[0004] The purpose of the present invention is to provide a photovoltaic power generation device that can automatically track sunlight, so as to maximize the use of solar energy and improve the power generation efficiency of solar photovoltaic panels.

[0005] The present invention provides a photovoltaic power generation device capable of automatically tracking sunlight, comprising: a photovoltaic panel assembly, a sun detection device, an axial tracking adjustment device, a radial tracking adjustment device, a base, an electric control box and a hydraulic station; the sun detection device is arranged on the photovoltaic panel assembly; the axial tracking adjustment device and the radial tracking adjustment device are both connected to the photovoltaic panel assembly, and the radial tracking adjustment device is connected to the axial tracking adjustment device; the base is connected to the radial tracking adjustment device; the electric control box is electrically connected to the sun detection device and is arranged on the base; the hydraulic station is arranged on the base to provide power oil for the axial tracking adjustment device and the radial tracking adjustment device.

[0006] Furthermore, the photovoltaic panel assembly includes: a photovoltaic panel and a bracket arranged at the bottom of the photovoltaic panel for support, and a hinge shaft is arranged at the end of the bracket.

[0007] Furthermore, the radial tracking adjustment device includes: a rotating shaft, a rotating seat and an actuator; one end of the rotating shaft is connected to the photovoltaic panel assembly, and the other end is connected to the actuator; a wear-resistant sleeve is inlaid on the rotating shaft, forming a rotating pair with the rotating shaft; the rotating seat is inserted into the rotating shaft, fixed by a locking nut, and connected to the actuator; the base is arranged at the bottom of the actuator.

[0008] Furthermore, the actuator includes: a cover body, a large gear, a small gear, a power mechanism and a radial locking device; the cover body is arranged in the middle of the rotating shaft; the large gear is installed on the rotating shaft and is located between the cover body and the base; the power mechanism is fixed on the base, one end of which is connected to the small gear, and power is transmitted to the large gear through the small gear, and the other end of which is connected to the radial locking device.

[0009] Furthermore, the radial locking device includes: a radial hydraulic lock and a radial hydraulic lock support, the radial hydraulic lock is connected to the radial hydraulic lock support, and the radial hydraulic lock support is fixed on the base; the hydraulic station provides power oil for the radial hydraulic lock.

[0010] Furthermore, the axial tracking adjustment device includes a cylinder and an axial locking device, one end of the cylinder is connected to the photovoltaic panel assembly, and the other end is fixed on the rotating seat; the axial locking device is arranged on the hinge shaft; the hydraulic station provides power oil to the cylinder and the axial locking device.

[0011] Furthermore, the axial locking device adopts an axial hydraulic lock.

[0012] Furthermore, there are two solar direction detection devices, which are respectively installed on the photovoltaic panel components, one for measuring the actual solar position in the longitudinal direction, and the other for measuring the actual solar position in the latitudinal direction.

[0013] Furthermore, the solar direction detection device includes: an outer cover, a combined spacer, a photovoltaic panel, a wire bundle, an encoder and a sealing plate; the combined spacer is arranged on the inner side of the outer cover, the photovoltaic panel is embedded in the combined spacer, and the wire bundle is arranged between the photovoltaic panel and the encoder for transmitting the current generated by the photovoltaic panel under illumination to the encoder in real time; the sealing plate is arranged at the bottom of the encoder.

[0014] Furthermore, the solar direction detection device also includes a heater for preventing snow piles from interfering with sunlight reception in winter.

[0015] Compared with the prior art, the beneficial effects of the present invention are: using the solar direction detection device to detect the sun's position, using the axial tracking adjustment device and the radial tracking adjustment device to adjust the longitude angle and latitude angle of the photovoltaic panel assembly in longitude and latitude respectively, so that the photovoltaic panel assembly is always aligned with the sun, so that the sunlight is directly irradiated on the solar photovoltaic panel, and the solar energy is utilized to the maximum extent, and the power generation efficiency of the solar photovoltaic panel is improved. It can be used normally under various terrains and climatic conditions, and each component has sufficient strength and rigidity to withstand the influence and test of strong winds, dust, rain and snow and ±50° temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of a photovoltaic power generation device capable of automatically tracking sunlight according to an embodiment of the present invention;

[0018] Figure 2 Schematic diagram of the structure of the day direction detection device according to an embodiment of the present invention.

[0019] Description of reference numerals:

[0020] 1: Photovoltaic panel assembly; 2: Articulated shaft; 3: Rotating shaft; 4: Locking nut; 5: Rotating seat; 6: Wear-resistant bushing; 7: Cylinder; 8: Sun direction detection device; 8-1: Outer cover; 8-2: Combined spacer; 8-3: Heater; 8-4: Photovoltaic sheet; 8-5: Wire harness; 8-6: Encoder; 8-7: Sealing plate; 9: Cover; 10: Retaining ring; 11: Small gear; 12: Large gear; 13: Power mechanism; 14: Axial hydraulic lock; 15: Limiting nail; 16: Flat key; 17: Connector; 18: Radial hydraulic lock; 19: Base; 20: Electric control box; 21: Radial hydraulic lock support; 22: Hydraulic station. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] like Figure 1 and Figure 2 As shown, the present invention provides a photovoltaic power generation device that can automatically track sunlight, including: a photovoltaic panel assembly 1, a sun detection device 8, an axial tracking adjustment device, a radial tracking adjustment device, a base 19, an electric control box 20 and a hydraulic station 22. The sun detection device 8 is arranged on the photovoltaic panel assembly 1, the axial tracking adjustment device and the radial tracking adjustment device are both connected to the photovoltaic panel assembly 1, and the radial tracking adjustment device is connected to the axial tracking adjustment device. The base 19 is connected to the radial tracking adjustment device, and the electric control box 20 is electrically connected to the sun detection device 8 and is arranged on the base 19. The hydraulic station 22 is arranged on the base 19 to provide power oil for the axial tracking adjustment device and the radial tracking adjustment device.

[0025] The photovoltaic panel assembly 1 includes: a photovoltaic panel and a bracket arranged at the bottom of the photovoltaic panel for support, and a hinge shaft 2 is arranged at the end of the bracket. The photovoltaic panel and the bracket are one of the core components of the photovoltaic power generation device. The photovoltaic panel and the bracket are connected to the radial tracking adjustment device through the hinge shaft 2. The hinge shaft 2 is a connecting part between the photovoltaic panel and the bracket and the rotating shaft. The photovoltaic panel and the bracket can rotate around the hinge shaft 2, and the latitude angle of the photovoltaic panel can be adjusted through the axial tracking adjustment device.

[0026] The radial tracking adjustment device includes: a rotating shaft 3, a rotating seat 5 and an actuator; one end of the rotating shaft 3 is connected to the photovoltaic panel assembly 1, and the other end is connected to the actuator; a wear-resistant sleeve 6 is inlaid on the rotating shaft 3, forming a rotating pair with the rotating shaft 3; the rotating seat 5 is inserted into the rotating shaft 3, fixed by a locking nut 4, and connected to the actuator; the base 19 is arranged at the bottom of the actuator.

[0027] The rotating shaft 3 is an important part of the photovoltaic power generation device and is made of high-quality alloy steel. The upper part of the rotating shaft 3 is connected to the photovoltaic panel and the bracket through the hinge shaft 2. It is connected to the rotating seat 5 through a square shaft segment or spline and fixed and locked with a locking nut 4. The rotating shaft 3 forms a rotating pair with the upper and lower wear-resistant sleeves 6, which are lubricated with high-quality grease.

[0028] The rotating seat 5 is an annular body, which is made by precision casting and processing. The rotating seat 5 is tightly combined with the rotating shaft 3 through the inner square hole or spline. In order to prevent the photovoltaic panel from excessively rotating in the horizontal plane, two limit pins 15 are specially designed to limit the extreme position. The limit pins 15 are installed on the actuator, corresponding to the half annular hole on the rotating seat 5.

[0029] The actuator includes: a cover body 9, a large gear 12, a small gear 11, a power mechanism 13 and a radial locking device; the cover body 9 is inserted into the middle of the rotating shaft 3; the large gear 12 is installed on the rotating shaft 3, and is located between the cover body 9 and the base 19; the power mechanism 13 is fixed on the base 19, one end of which is connected to the small gear 11, and the power is transmitted to the large gear 12 through the small gear 11, and the other end of which is connected to the radial locking device. The large gear 12 is installed at the lower part of the rotating shaft 3 and is fixed and locked with a double round nut. The rotating shaft 3 and the large gear 12 are connected with a flat key 16. The limit pin 15 is installed on the cover body 9. A retaining ring 10 is installed at the end of the small gear 11. The cover body 9 and the base 19 are fixedly connected by a connector 17.

[0030] The radial locking device comprises: a radial hydraulic lock 18 and a radial hydraulic lock support 21, wherein the radial hydraulic lock 18 is connected to the radial hydraulic lock support 21, and the radial hydraulic lock support 21 is fixed on the base 19. The hydraulic station 22 provides power oil for the radial hydraulic lock 18.

[0031] The power mechanism 13 preferably uses a stepper motor as a power source for adjusting the longitudinal angle of the photovoltaic panel. In order to increase the power of the action and the braking effect, dual stepper motors are used and arranged symmetrically. The stepper motor adopts a dual output shaft mode, one end of which is connected to a small gear 11 to transmit power to a large gear 12; a radial hydraulic lock 18 is installed at the other end. Before the power hydraulic oil is unlocked, the radial hydraulic lock 18 holds the stepper motor drive shaft tightly, which can limit the horizontal rotation of the photovoltaic panel and the bracket. The outer shell of the radial hydraulic lock 18 is connected to the radial hydraulic lock support 21 and fixed to the base 19 of the photovoltaic power generation device. The stepper motor can also be replaced by a hydraulic motor.

[0032] The axial tracking adjustment device includes an oil cylinder 7 and an axial locking device. The axial locking device adopts an axial hydraulic lock 14. One end of the oil cylinder 7 is connected to the photovoltaic panel assembly 1, and the other end is fixed on the rotating seat 5. The axial hydraulic lock 14 is arranged on the hinge shaft 2. The photovoltaic panel and the bracket can be rotated around the hinge shaft 2 by extending and contracting the oil cylinder 7, and the panel angle in the latitudinal direction can be adjusted so that the photovoltaic panel is aligned with the sun in the latitudinal direction. The axial hydraulic lock 4 is a normally closed hydraulic lock, and the power hydraulic oil is provided by the hydraulic station 22. Before the power hydraulic oil is unlocked, it and the oil cylinder 7 together limit the latitudinal rotation of the photovoltaic panel and the bracket to keep the angle between the panel and the horizontal plane unchanged.

[0033] The oil cylinder 7 can also be replaced by a motor+screw or a hydraulic motor+screw device.

[0034] The base 19 is the basic component of the photovoltaic power generation device that can automatically track sunlight. The upper part is a disc, on which two stepper motors and radial hydraulic lock supports 21 are symmetrically installed; the middle part is a pillar made of steel pipe; the lower part is a pier with anchor bolt holes, which can firmly fix the photovoltaic power generation device that can automatically track sunlight on the foundation.

[0035] The hydraulic station 22 is a provider of power oil for the hydraulic lock and the oil cylinder 7. In order to meet the normal use of the photovoltaic power generation device under various terrains and various climatic conditions of ±50°, the hydraulic oil uses aviation hydraulic oil.

[0036] The electric control box 20 is the control center of the photovoltaic power generation device that can automatically track sunlight. It receives control signals from the central control room and transmits various information of the photovoltaic power generation device to the central control room. The electric control box 20 receives information sent by the longitudinal and latitudinal sun detection devices in real time, and adjusts the longitudinal and latitudinal angles of the photovoltaic panel in sequence according to the preset program, so that the entire photovoltaic panel can always be aligned with the sun, allowing sunlight to directly hit the solar photovoltaic panel, thereby improving the power generation efficiency of the solar photovoltaic panel and maximizing the use of solar energy.

[0037] Two identical sun direction detection devices 8 are installed on the photovoltaic panel, but they are placed in different directions and detect the sun direction from different directions. Figure 1 As shown, the upper sun direction detection device 8 detects the latitude sun direction, and the lower sun direction detection device 8 detects the longitude sun direction. The sun direction detection device 8 can be placed at any position of the photovoltaic panel to facilitate installation and maintenance without affecting the integrity of the photovoltaic panel.

[0038] like Figure 2 As shown, the solar detection device 8 includes: an outer cover 8-1, a combined spacer 8-2, a photovoltaic sheet 8-4, a wire bundle 8-5, an encoder 8-6 and a sealing plate 8-7. The combined spacer 8-2 is arranged on the inner side of the outer cover 8-1, and a number of rectangular photovoltaic sheets 8-4 of the same shape and area are embedded in the combined spacer 8-2. The wire bundle is arranged between the photovoltaic sheet 8-4 and the encoder 8-6, and is used to transmit the current generated by the photovoltaic sheet 8-4 under illumination to the encoder 8-6 in real time. The sealing plate 8-7 is arranged at the bottom of the encoder 8-6. The solar detection device 8 also includes a heater 8-5, which is used to avoid interference of snow piles in winter on receiving sunlight. The number of photovoltaic sheets 8-4 is related to the panel adjustment accuracy of the photovoltaic power generation device, and can be selected according to actual conditions.

[0039] The sun detection device 8 is placed in a glass cover 8-1 to prevent dust, rain and snow. A layer of nano transparent film is sprayed on the inner and outer surfaces of the glass cover 8-1 to effectively prevent dust, water stains and the like from adhering to the surface and improve light transmittance.

[0040] The combined spacer 8-2 is an important part of the sun detection device. It is made of polymer material, has the characteristics of insulation, high temperature resistance, sunlight resistance and no deformation, has certain strength and toughness, and is opaque.

[0041] The encoder 8-6 receives the current conducted by each photovoltaic panel 8-4 in real time, compares the magnitudes, selects the largest one, and transmits its number and current magnitude to the control unit of the electric control box 20 of the photovoltaic power generation device. When the photovoltaic panel is facing the sun, whether it is the longitudinal or latitudinal solar detection device, the maximum current of the photovoltaic panel must be A. If the maximum is not A, it means that the sunlight is not directly shining on the photovoltaic panel. The control unit issues instructions according to the offset amount and the pre-set program to adjust the angle of the photovoltaic power generation device panel and align the photovoltaic panel with the sun. Each time, it must be adjusted in the order of longitude first and latitude later.

[0042] The sealing plate 8-7 is a sealing element of the day detection device. The sealing plate 8-7 isolates the components of the day detection device from the outside world. At the same time, the sealing plate 8-7 is also a connecting component between the day detection device and the external installation. The sealing plate 8-7 is made of a polymer material and has the characteristics of being breathable and waterproof.

[0043] The invention can be used normally under various terrains and climatic conditions, and each component has sufficient strength and rigidity to withstand the influence and test of strong winds, dust, rain and snow and a temperature of ±50°.

[0044] To improve efficiency, when the sun sets every day, the photovoltaic panels should be adjusted to the position around noon, waiting for the start of the next day's work.

[0045] The basic principle of the present invention is to adjust the longitudinal and latitudinal angles of the photovoltaic panel respectively according to the actual solar position detected by the two longitudinal and latitudinal solar detection devices 8 installed on the photovoltaic panel under the control of the electrical control unit, so that the entire photovoltaic panel is always aligned with the sun, so that the sunlight directly hits the solar photovoltaic panel, maximizes the use of solar energy, and improves the power generation efficiency of the solar photovoltaic panel.

[0046] The specific actions are as follows: 1. Start the hydraulic station 22, loosen the radial hydraulic lock 18, and transmit the power to the rotating shaft 3 through the small gear 11 and the large gear 12 by rotating the stepper motor, so that it rotates accordingly as required, until the A photovoltaic panel current of the longitudinal sun detection device is detected to be the largest, that is, the adjustment of the longitudinal direction angle of the photovoltaic panel is completed, so that the sunlight irradiates the photovoltaic panel in the longitudinal direction. After the action is completed, close the radial hydraulic lock 18 and lock it;

[0047] 2. Loosen the axial hydraulic lock 14 on the hinge shaft 2, and then extend and retract the cylinder 7 to rotate the photovoltaic panel and the bracket around the hinge shaft 2, and adjust the latitudinal angle of the photovoltaic panel until the A photovoltaic panel current of the latitudinal sun detection device is detected to be the largest, so that the sunlight can irradiate the photovoltaic panel vertically.

[0048] Note: Each time, the warp and weft directions should be adjusted in sequence, not at the same time. After each adjustment, the hydraulic station 22 should be closed to ensure that the radial hydraulic lock 18 and the axial hydraulic lock 14 are in a closed and locked state.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A photovoltaic power generation device capable of automatically tracking sunlight, characterized in that: include: A photovoltaic panel assembly (1), a sun detection device (8), an axial tracking adjustment device, a radial tracking adjustment device, a base (19), an electric control box (20) and a hydraulic station (22); the sun detection device (8) is arranged on the photovoltaic panel assembly (1); the axial tracking adjustment device and the radial tracking adjustment device are both connected to the photovoltaic panel assembly (1), and the radial tracking adjustment device is connected to the axial tracking adjustment device; the base (19) is connected to the radial tracking adjustment device; the electric control box (20) is electrically connected to the sun detection device (8) and is arranged on the base (19); the hydraulic station (22) is arranged on the base (19) and provides power oil for the axial tracking adjustment device and the radial tracking adjustment device; The photovoltaic panel assembly (1) comprises: a photovoltaic panel and a bracket arranged at the bottom of the photovoltaic panel for supporting, wherein the end of the bracket is provided with a hinge shaft (2); the radial tracking adjustment device comprises: a rotating shaft (3), a rotating seat (5) and an actuator; one end of the rotating shaft (3) is connected to the photovoltaic panel assembly (1), and the other end is connected to the actuator; a wear-resistant bushing (6) is inlaid on the rotating shaft (3) and forms a rotating pair with the rotating shaft (3); the rotating seat (5) is passed through the rotating shaft (3), fixed by a locking nut (4), and connected to the actuator; the base (19) is arranged at the bottom of the actuator; the actuator comprises: a cover body (9), a large gear (12), a small gear (11), a power mechanism (13) and a radial locking device; the cover body (9) is passed through the middle of the rotating shaft (3); the large gear (12) is installed on the rotating shaft (3) and is located at the cover body (9) and the base (19); the power mechanism (13) is fixed on the base (19), one end of which is connected to the small gear (11) to transmit power to the large gear (12) through the small gear (11), and the other end of which is connected to the radial locking device; the radial locking device comprises: a radial hydraulic lock (18) and a radial hydraulic lock support (21), the radial hydraulic lock (18) is connected to the radial hydraulic lock support (21), and the radial hydraulic lock support (21) is fixed on the base (19); the hydraulic station (22) provides power oil for the radial hydraulic lock (18); the axial tracking adjustment device comprises an oil cylinder (7) and an axial locking device, one end of the oil cylinder (7) is connected to the photovoltaic panel assembly (1), and the other end is fixed to the rotating seat (5); the axial locking device is arranged on the hinge shaft (2); the hydraulic station (22) provides power oil for the oil cylinder (7) and the axial locking device.

2. A photovoltaic power generation device capable of automatically tracking sunlight according to claim 1, characterized in that: The axial locking device adopts an axial hydraulic lock (14).

3. A photovoltaic power generation device capable of automatically tracking sunlight according to claim 1, characterized in that: There are two solar direction detection devices (8), which are respectively installed on the photovoltaic panel assembly (1), one for measuring the actual solar position in the longitudinal direction, and the other for measuring the actual solar position in the latitudinal direction.

4. A photovoltaic power generation device capable of automatically tracking sunlight according to claim 3, characterized in that: The solar direction detection device (8) comprises: an outer cover (8-1), a combined spacer (8-2), a photovoltaic sheet (8-4), a wire bundle (8-5), an encoder (8-6) and a sealing plate (8-7); the combined spacer (8-2) is arranged on the inner side of the outer cover (8-1), the photovoltaic sheet (8-4) is embedded in the combined spacer (8-2), the wire bundle (8-5) is arranged between the photovoltaic sheet (8-4) and the encoder (8-6), and is used for transmitting the current generated by the photovoltaic sheet (8-4) under illumination to the encoder (8-6) in real time; and the sealing plate (8-7) is arranged at the bottom of the encoder (8-6).

5. A photovoltaic power generation device capable of automatically tracking sunlight according to claim 4, characterized in that: The sun direction detection device (8) also includes a heater, which is used to prevent the interference of snow piles in winter on the reception of sunlight.

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