阅读说明：本技术 结合地热及超声波的光伏板除雪/冰装置及方法 (Geothermal and ultrasonic combined snow/ice removing device and method for photovoltaic panel ) 是由 李栋 沈雷虎 王佳勇 于超 商雨禾 艾凡彪 陈红伟 吴九龙 于 2021-06-24 设计创作，主要内容包括：本发明公开了一种结合地热及超声波的光伏板除雪/冰装置及方法,包括地热加热组件、超声振动组件和重力传感器；地热加热组件包括膨胀水箱、循环水泵和循环水管；循环水管包括加热进水管、光伏板加热管和回水管；光伏板加热管均匀布设在光伏板的背板上；加热进水管的中部埋设在土壤中；超声振动组件包括蓄电池和若干个均与蓄电池连接的压电陶瓷片；若干个压电陶瓷片均布在光伏板的背板上；重力传感器用于监测光伏板上覆盖冰雪的重量。本发明有效利用地热融化光伏板上的积雪,同时,结合蓄电池将超声波的电振荡信号传递到压电陶瓷片上,压电陶瓷片通过逆压电效应产生高频振动,进而辅助光伏板上的积雪滑落,大大提高除雪效率。(The invention discloses a photovoltaic panel snow/ice removing device and method combining terrestrial heat and ultrasonic waves, wherein the device comprises a terrestrial heat heating assembly, an ultrasonic vibration assembly and a gravity sensor; the geothermal heating assembly comprises an expansion water tank, a circulating water pump and a circulating water pipe; the circulating water pipe comprises a heating water inlet pipe, a photovoltaic panel heating pipe and a water return pipe; the photovoltaic plate heating pipes are uniformly distributed on the back plate of the photovoltaic plate; the middle part of the heating water inlet pipe is buried in the soil; the ultrasonic vibration component comprises a storage battery and a plurality of piezoelectric ceramic pieces which are connected with the storage battery; the piezoelectric ceramic plates are uniformly distributed on the back plate of the photovoltaic panel; the gravity sensor is used for monitoring the weight of the photovoltaic panel covered with ice and snow. The snow removing device effectively utilizes terrestrial heat to melt accumulated snow on the photovoltaic panel, meanwhile, the storage battery is combined to transmit an ultrasonic electric oscillation signal to the piezoelectric ceramic plate, and the piezoelectric ceramic plate generates high-frequency vibration through an inverse piezoelectric effect, so that the accumulated snow on the photovoltaic panel is assisted to slide off, and the snow removing efficiency is greatly improved.)

1. The utility model provides a combine geothermol power and ultrasonic wave's photovoltaic board snow removing/ice device which characterized in that: the device comprises a geothermal heating assembly, an ultrasonic vibration assembly and a gravity sensor;

the geothermal heating assembly comprises an expansion water tank, a circulating water pump and a circulating water pipe;

the expansion water tank and the circulating water pump are arranged on the ground on one side of the photovoltaic panel;

the circulating water pipe comprises a heating water inlet pipe, a photovoltaic panel heating pipe and a water return pipe; the photovoltaic plate heating pipes are uniformly distributed on the back plate of the photovoltaic plate; the water inlet of the heating water inlet pipe is sequentially connected with the circulating water pump and the expansion water tank, the water outlet of the heating water inlet pipe is connected with the water inlet of the photovoltaic panel heating pipe, and the middle part of the heating water inlet pipe is embedded in soil; one end of the water return pipe is connected with a water outlet of the photovoltaic panel heating pipe, and the other end of the water return pipe is connected with the expansion water tank;

the ultrasonic vibration component comprises a storage battery and a plurality of piezoelectric ceramic pieces; the piezoelectric ceramic plates are uniformly distributed on the back plate of the photovoltaic plate and are distributed in a staggered manner with the photovoltaic plate heating pipes; each piezoelectric ceramic piece is electrically connected with the storage battery;

the gravity sensor is used for monitoring the weight of the photovoltaic panel covered with ice and snow, and is respectively connected with the circulating water pump and the storage battery.

2. The combined geothermal and ultrasonic photovoltaic panel snow/ice removal device of claim 1, wherein: the heating water inlet pipe is buried at a position of-2.5 m to-20 m underground according to actual conditions.

3. The combined geothermal and ultrasonic photovoltaic panel snow/ice removal device of claim 1, wherein: the photovoltaic board heating pipe is arranged on the photovoltaic board back plate in a grid mode, and the piezoelectric ceramic pieces and the gravity sensors are uniformly distributed in grids formed by the photovoltaic board heating pipe.

4. The combined geothermal and ultrasonic photovoltaic panel snow/ice removal device of claim 1, wherein: the periphery of the heating water inlet pipe between the soil and the photovoltaic panel is coated with a heat preservation layer.

5. The combined geothermal and ultrasonic photovoltaic panel snow/ice removal device of claim 1, wherein: the photovoltaic panel is characterized by also comprising an ambient temperature sensor, wherein the ambient temperature sensor is used for detecting the ambient temperature of the area where the photovoltaic panel is located;

a water inlet temperature sensor is arranged at a water inlet of the photovoltaic plate heating pipe, and a water outlet temperature sensor is arranged at a water outlet of the photovoltaic plate heating pipe;

a flowmeter is arranged in the circulating water pipe;

the environment temperature sensor, the water inlet temperature sensor, the water outlet temperature sensor and the flowmeter are all connected with the weight sensor.

6. A snow/ice removing method for a photovoltaic panel by combining geothermal energy and ultrasonic waves is characterized by comprising the following steps: the method comprises the following steps:

step 1, setting a weight threshold value of covering ice and snow on a photovoltaic panel: setting a first weight threshold and a second weight threshold, wherein the first weight threshold is smaller than the second weight threshold;

step 2, starting a circulating water pump: when the environmental temperature is lower than the set temperature or the weight detected by the weight sensor exceeds a weight threshold, the circulating water pump is started, and the water body in the expansion water tank is heated by the terrestrial heat after sequentially passing through the circulating water pump and the heating water inlet pipe pre-buried in the soil;

step 3, heating for removing ice and snow: the heated water body heats the photovoltaic plate through the photovoltaic plate heating pipe, so that ice and snow on the photovoltaic plate are removed, and icing is prevented;

step 4, heating and oscillating double ice and snow removal: when the weight detected by the weight sensor exceeds the second weight threshold value, the circulating water pump is started, the storage battery transmits an electric signal to the piezoelectric ceramic piece arranged on the back of the photovoltaic panel, the piezoelectric ceramic piece generates high-frequency vibration through the inverse piezoelectric effect, snow or ice blocks on the photovoltaic panel are further assisted to slide, and the ice and snow removing efficiency is improved.

7. The combined geothermal and ultrasonic photovoltaic panel snow/ice removal method of claim 6, wherein: in step 3, the calculation formula of the heat transfer quantity Q of the heating water in the photovoltaic panel heating pipe is as follows:

Q＝cm(t_in-t_out)

wherein c is the specific heat of the heated water; m is the mass flow of the heating water; t is t_inThe inlet water flow temperature of the photovoltaic panel heating tube; t is t_outThe outlet water flow temperature of the photovoltaic plate heating pipe; d is the diameter of the photovoltaic panel heating pipe; rho is the density of the water body; upsilon is the flow velocity of the water body.

8. The combined geothermal and ultrasonic photovoltaic panel snow/ice removal method of claim 7, wherein: through controlling the pipe diameter of the heating water inlet pipe, the burial depth of the heating water inlet pipe in soil, the buried length and the water flow velocity upsilon, t is enabled to be t_outKeeping the temperature at 15-20 ℃.

9. The combined geothermal and ultrasonic photovoltaic panel snow/ice removal method of claim 7, characterized in thatCharacterized in that: adjusting the flow velocity upsilon of the water body according to the snow accumulation amount on the photovoltaic panel and the temperature of the environment where the photovoltaic panel is located, so that t_outKeeping the temperature at 5-10 ℃.

10. The combined geothermal and ultrasonic photovoltaic panel snow/ice removal method of claim 9, wherein: in the step 4, when the weight detected by the weight sensor exceeds the weight threshold value two and the ice and snow sensor detects that the environmental ice and snow fall amount exceeds a preset value, the deposition of newly falling ice and snow on the photovoltaic panel is slowed down in a mode of increasing the inclination angle of the photovoltaic panel, and ice and snow accumulated on the photovoltaic panel rapidly fall under the vibration of the piezoelectric ceramic plate.

Technical Field

The invention relates to the technical field of solar snow removal, in particular to a photovoltaic panel snow/ice removing device and method combining geothermal energy and ultrasonic waves.

Background

Photovoltaic technology is an advanced technology meeting the requirements of the times. However, due to geographical weather reasons in China, coverage of ice and snow has considerable harm to aspects such as power generation amount and safety of a photovoltaic system, and the novel effective photovoltaic snow removing device is worthy of research.

The heat energy of the underground soil is inexhaustible, the underground shallow soil is relatively stable, the temperature of the underground soil is kept constant at about 20 ℃ for a long time, the heat supply is stable, and the cost is low. Therefore, the heat energy of the underground soil is used for heating water to further melt the accumulated snow on the photovoltaic panel surface, and the requirement of environmental protection is met.

By utilizing the piezoelectric effect, when a high-frequency electric signal is applied to piezoelectric ceramic, an ultrasonic signal can be generated, the contact interface of the accumulated snow and the photovoltaic panel is beneficial to the vibration of the accumulated snow through the vibration effect of ultrasonic waves, and the ultrasonic technology is a new technology and has good application in various fields. Due to the physical action of ultrasound, a local temporary negative pressure region is formed in a certain area in the liquid, and then cavities or bubbles are generated in the liquid, the bubbles filled with natural gas or air are in an unstable state, and when the bubbles are suddenly combined, shock waves are generated, so that great pressure is generated in a local micro area, namely the cavitation effect of the ultrasonic waves. The nonlinear vibration of bubbles generated by ultrasonic cavitation and the huge pressure generated when the bubbles are broken can cause fixed damage to ice and snow, thereby having the effect of deicing/snow.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art and provides a geothermal and ultrasonic combined photovoltaic panel snow/ice removing device and a method thereof, wherein the geothermal and ultrasonic combined photovoltaic panel snow/ice removing device and the method thereof effectively utilize geothermal heat to melt snow on a photovoltaic panel, meanwhile, a storage battery is combined to transmit an electric signal to a piezoelectric ceramic piece adhered to the back of the photovoltaic panel, and the piezoelectric ceramic piece generates high-frequency vibration through an inverse piezoelectric effect to assist the snow on the photovoltaic panel to slide down, so that the snow removing efficiency is greatly improved. The invention combines a gravity sensor and controls the opening and closing of the circulating water pump and the storage battery through the weight change of the photovoltaic panel.

In order to solve the technical problems, the invention adopts the technical scheme that:

a snow/ice removing device for a photovoltaic panel combining terrestrial heat and ultrasonic waves comprises a terrestrial heat heating assembly, an ultrasonic vibration assembly and a gravity sensor.

The geothermal heating assembly comprises an expansion water tank, a circulating water pump and a circulating water pipe.

Expansion tank and circulating water pump set up on the ground of photovoltaic board one side.

The circulating water pipe comprises a heating water inlet pipe, a photovoltaic panel heating pipe and a water return pipe; the photovoltaic plate heating pipes are uniformly distributed on the back plate of the photovoltaic plate; the water inlet of the heating water inlet pipe is sequentially connected with the circulating water pump and the expansion water tank, the water outlet of the heating water inlet pipe is connected with the water inlet of the photovoltaic panel heating pipe, and the middle part of the heating water inlet pipe is embedded in soil; one end of the water return pipe is connected with a water outlet of the photovoltaic panel heating pipe, and the other end of the water return pipe is connected with the expansion water tank.

The ultrasonic vibration component comprises a storage battery and a plurality of piezoelectric ceramic pieces; the piezoelectric ceramic plates are uniformly distributed on the back plate of the photovoltaic plate and are distributed in a staggered manner with the photovoltaic plate heating pipes; each piezoelectric ceramic piece is electrically connected with the storage battery.

The gravity sensor is used for monitoring the weight of the photovoltaic panel covered with ice and snow, and is respectively connected with the circulating water pump and the storage battery.

The heating water inlet pipe is buried at a position of-2.5 m to-20 m underground according to actual conditions.

The photovoltaic board heating pipe is arranged on the photovoltaic board back plate in a grid mode, and the piezoelectric ceramic pieces and the gravity sensors are uniformly distributed in grids formed by the photovoltaic board heating pipe.

The periphery of the heating water inlet pipe between the soil and the photovoltaic panel is coated with a heat preservation layer.

The photovoltaic panel temperature detection device further comprises an ambient temperature sensor, and the ambient temperature sensor is used for detecting the ambient temperature of the area where the photovoltaic panel is located.

The water inlet of the photovoltaic plate heating pipe is provided with a water inlet temperature sensor, and the water outlet of the photovoltaic plate heating pipe is provided with a water outlet temperature sensor.

A flowmeter is arranged in the circulating water pipe.

The environment temperature sensor, the water inlet temperature sensor, the water outlet temperature sensor and the flowmeter are all connected with the weight sensor.

A snow/ice removing method for a photovoltaic panel combining geothermal energy and ultrasonic waves comprises the following steps.

Step 1, setting a weight threshold value of covering ice and snow on a photovoltaic panel: setting a first weight threshold and a second weight threshold, wherein the first weight threshold is smaller than the second weight threshold.

Step 2, starting a circulating water pump: when the environmental temperature is lower than the set temperature or the weight detected by the weight sensor exceeds a weight threshold value, the circulating water pump is started, and the water body in the expansion water tank is heated by the terrestrial heat after sequentially passing through the circulating water pump and the heating water inlet pipe pre-buried in the soil.

Step 3, heating for removing ice and snow: the water after the heating heats the photovoltaic board through the photovoltaic board heating pipe, and then clears away the ice and snow that is located on the photovoltaic board to prevent to freeze.

Step 4, heating and oscillating double ice and snow removal: when the weight detected by the weight sensor exceeds the second weight threshold value, the circulating water pump is started, the storage battery transmits an electric signal to the piezoelectric ceramic piece arranged on the back of the photovoltaic panel, the piezoelectric ceramic piece generates high-frequency vibration through the inverse piezoelectric effect, snow or ice blocks on the photovoltaic panel are further assisted to slide, and the ice and snow removing efficiency is improved.

In step 3, the calculation formula of the heat transfer quantity Q of the heating water in the photovoltaic panel heating pipe is as follows:

Q＝cm(t_in-t_out)

wherein c is the specific heat of the heated water; m is the mass flow of the heating water; t is t_inThe inlet water flow temperature of the photovoltaic panel heating tube; t is t_outThe outlet water flow temperature of the photovoltaic plate heating pipe; d is the diameter of the photovoltaic panel heating pipe; rho is the density of the water body; upsilon is the flow velocity of the water body.

Through controlling the pipe diameter of the heating water inlet pipe, the burial depth of the heating water inlet pipe in soil, the buried length and the water flow velocity upsilon, t is enabled to be t_outKeeping the temperature at 15-20 ℃.

Adjusting the flow velocity upsilon of the water body according to the snow accumulation amount on the photovoltaic panel and the temperature of the environment where the photovoltaic panel is located, so that t_outKeeping the temperature at 5-10 ℃.

In the step 4, when the weight detected by the weight sensor exceeds the weight threshold value two and the ice and snow sensor detects that the environmental ice and snow fall amount exceeds a preset value, the deposition of newly falling ice and snow on the photovoltaic panel is slowed down in a mode of increasing the inclination angle of the photovoltaic panel, and ice and snow accumulated on the photovoltaic panel rapidly fall under the vibration of the piezoelectric ceramic plate.

The invention has the following beneficial effects:

1. the invention combines a gravity sensor to control the opening and closing of a circulating water pump and a storage battery through the weight change of accumulated snow on a photovoltaic panel.

2. When the ambient temperature is too low or the snow accumulation amount on the photovoltaic panel is small, only geothermal heat is used for heating the photovoltaic panel, and the method specifically comprises the following steps: water from the expansion water tank exchanges heat with underground soil when passing through a heating water pipe buried under the expansion water tank, and flows through a photovoltaic panel heating pipe on the back of the photovoltaic panel, so that the effect of melting accumulated snow on the surface of the photovoltaic panel is achieved.

3. When the snow volume is big on the photovoltaic board, when utilizing geothermol power, combine the battery with the signal of telecommunication transmission to paste on the piezoceramics piece at the photovoltaic board back, piezoceramics piece produces high-frequency vibration through inverse piezoelectric effect, and then the snow landing on the supplementary photovoltaic board improves snow removing efficiency greatly.

4. When the snow accumulation amount on the photovoltaic panel is large and continuous snowfall exists, the deposition of newly falling snow on the photovoltaic panel can be slowed down in a mode of increasing the inclination angle of the photovoltaic panel, and on the other hand, the snow and ice accumulated on the photovoltaic panel can fall quickly under the vibration of the piezoelectric ceramic pieces.

Drawings

Fig. 1 shows a schematic structural view of a geothermal and ultrasonic combined snow/ice removing device for a photovoltaic panel according to the present invention.

Fig. 2 shows a planar layout of the gravity sensor, the piezoelectric ceramic plate and the photovoltaic panel heating tube on the back of the photovoltaic panel.

Fig. 3 shows a vertical plane layout diagram of the gravity sensor, the piezoelectric ceramic plate and the photovoltaic plate heating pipe on the back of the photovoltaic plate.

FIG. 4 shows a schematic diagram of a control method of the present invention.

Fig. 5 shows a flow chart of a control method in the present invention.

Among them are: the system comprises a water circulation pump 1, a water circulation pipe 2, a photovoltaic panel 3, a lead I4, a support frame 5, a storage battery 6, soil 7, a piezoelectric ceramic plate 8, a wire node 9, a photovoltaic panel heating pipe 10, a water inlet 11, a lead II 12, a water outlet 13, an expansion water tank 14 and a gravity sensor 15.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

In the description of the present invention, it is to be understood that the terms "left side", "right side", "upper part", "lower part", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and that "first", "second", etc., do not represent an important degree of the component parts, and thus are not to be construed as limiting the present invention. The specific dimensions used in the present example are only for illustrating the technical solution and do not limit the scope of protection of the present invention.

As shown in fig. 1 to 3, a geothermal and ultrasonic combined photovoltaic panel snow/ice removing device comprises a geothermal heating assembly, an ultrasonic vibration assembly, a gravity sensor 15, an ambient temperature sensor and a rain and snow sensor.

The environment temperature sensor is used for detecting the environment temperature of the area where the photovoltaic panel is located, and the rain and snow sensor is used for detecting the rainfall or snowfall of the area where the photovoltaic panel is located.

The geothermal heating assembly comprises an expansion water tank 14, a circulating water pump 1 and a circulating water pipe 2.

Expansion tank and circulating water pump set up on the ground of photovoltaic board 3 one side.

Circulating pipe includes heating inlet tube, photovoltaic board heating pipe 10 and wet return.

The photovoltaic board heating pipe is evenly arranged on the back plate of the photovoltaic board. In this embodiment, the photovoltaic panel heating pipe is arranged on the photovoltaic panel backplate in a grid manner, and the preferred 9 of grid quantity are 1 central grid, 4 corner grids and 4 transition grids respectively.

Further, the water inlet of the photovoltaic plate heating pipe is preferably provided with an inlet water temperature sensor, and the water outlet of the photovoltaic plate heating pipe is preferably provided with an outlet water temperature sensor.

The water inlet of heating inlet tube is connected with circulating water pump and expansion tank in proper order, and the water inlet 11 of photovoltaic board heating pipe is connected to the delivery port of heating inlet tube, and the middle part of heating inlet tube is buried underground in soil. The heating water inlet pipe is buried at a position of-2.5 m to-20 m underground according to actual conditions.

Further, the heating inlet tube periphery that is located between soil and the photovoltaic board preferably wraps has the heat preservation, prevents that the heat from running off.

One end of the water return pipe is connected with a water outlet 13 of the photovoltaic panel heating pipe, and the other end of the water return pipe is connected with an expansion water tank.

Further, a flow meter is preferably arranged in the circulating water pipe and used for detecting the flow velocity of the water body.

The ultrasonic vibration component (also called an ultrasonic device) comprises a storage battery 6 and a plurality of piezoelectric ceramic pieces 8, wherein the piezoelectric ceramic pieces are uniformly distributed on the back plate of the photovoltaic panel and are arranged in a staggered manner with the heating pipes of the photovoltaic panel. The storage battery can store the electric energy of the photovoltaic panel.

In the present embodiment, the number of the piezoelectric ceramic plates is preferably 4, and the piezoelectric ceramic plates are symmetrically arranged in four corner grids. Two piezoelectric ceramic piece leads 12 positioned on the same long side are connected with two leads to form a wire node 9, and the wire node 9 is electrically connected with the storage battery through the lead I4.

The gravity sensor is used for monitoring the weight of the photovoltaic panel covered with ice and snow, and is respectively connected with the circulating water pump and the storage battery. In this embodiment, the gravity sensors are preferably arranged within a central grid.

The environment temperature sensor, the water inlet temperature sensor, the water outlet temperature sensor, the rain and snow sensor and the flowmeter are all connected with the weight sensor.

A snow/ice removing method for a photovoltaic panel combining geothermal energy and ultrasonic waves comprises the following steps.

Step 1, setting a weight threshold value of covering ice and snow on a photovoltaic panel: a weight threshold SV1 and a weight threshold SV2 are set, and the weight threshold SV1 is smaller than the weight threshold SV 2.

Step 2, starting the circulating water pump, in this embodiment, the following two starting timings are preferably provided.

The starting time is as follows: when the weight detected by the weight sensor does not exceed the weight threshold value one, but the ambient temperature is lower than the set temperature, the set temperature is preferably 0 °. At this moment, start circulating water pump, can prevent rainwater or dew etc. and condense on the photovoltaic board surface, also play the effect of prevention in advance promptly.

And starting the opportunity II: when the weight detected by the weight sensor exceeds a weight threshold SV1, the circulating water pump is controlled to start based on a PID algorithm.

After the circulating water pump is started, the water body in the expansion water tank is heated by the terrestrial heat after sequentially passing through the circulating water pump and the heating water inlet pipe pre-buried in the soil.

Step 3, heating for removing ice and snow: the water after the heating heats the photovoltaic board through the photovoltaic board heating pipe, and then clears away the ice and snow that is located on the photovoltaic board to prevent to freeze.

The calculation formula of the heat transfer quantity Q of the heating water body in the photovoltaic panel heating pipe is as follows:

Q＝cm(t_in-t_out)

wherein c is the specific heat of the heated water; m is the mass flow of the heating water, which is about 0.32kg/s in the embodiment; t is t_inThe inlet water flow temperature of the photovoltaic panel heating tube; t is t_outThe outlet water flow temperature of the photovoltaic plate heating pipe; d is the diameter of the photovoltaic panel heating tube, and is preferably 20 mm; rho is the density of the water body; upsilon is the flow velocity of the water body, and is preferably 1 m/s.

Through controlling the pipe diameter of the heating water inlet pipe, the burial depth of the heating water inlet pipe in soil, the buried length and the water flow velocity upsilon, t is enabled to be t_outThe temperature is maintained at 15 to 20 ℃, more preferably 18 ℃. t is t_outThe temperature is set, so that the safety of the photovoltaic panel component is ensured while the ice and snow are melted, and the photovoltaic panel is not damaged.

Adjusting the flow velocity upsilon of the water body according to the snow accumulation amount on the photovoltaic panel and the temperature of the environment where the photovoltaic panel is located, so that t_outThe temperature is maintained at 5 to 10 ℃, more preferably 8 ℃.

In addition, according to a heat balance formula on the photovoltaic panel in unit area, rain and snow which do not exceed the first weight threshold value can be fully melted.

And 4, heating and oscillating to remove ice and snow doubly.

When the weight detected by the weight sensor exceeds a weight threshold SV2, based on a PID algorithm, the storage battery is started while the circulating water pump is kept started, the storage battery transmits an electric signal to the piezoelectric ceramic piece arranged on the back of the photovoltaic panel, and the piezoelectric ceramic piece generates high-frequency vibration through an inverse piezoelectric effect, so that accumulated snow or ice blocks on the photovoltaic panel are assisted to slide down, and the ice and snow removing efficiency is improved.

Further, when the weight detected by the weight sensor exceeds a second weight threshold value and the environmental snowfall amount detected by the ice and snow sensor exceeds a preset value (the preset value is preferably medium snowfall, namely the horizontal visible distance is 500-100m during snowfall, the depth of the snow on the ground is equal to or more than 5cm, namely the snow still falls at a large density), at the moment, the deposition of the newly falling ice and snow on the photovoltaic panel is slowed down in a manner of increasing the inclination angle of the photovoltaic panel, and the ice and snow already accumulated on the photovoltaic panel rapidly falls under the vibration of the piezoelectric ceramic plate.

Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the embodiments, and various equivalent modifications can be made within the technical spirit of the present invention, and the scope of the present invention is also within the scope of the present invention.