Cleaning device for photovoltaic panel

Abstract

The utility model relates to the field of photovoltaic power generation, in particular to a cleaning device for a photovoltaic panel, a liquid pump and a bubble water generating device are arranged in a shell, the bubble water generating device comprises a liquid storage cavity, an air inlet pipe and a liquid inlet pipe, a liquid supply pipe is arranged at the input end of the liquid pump, and one end of the liquid supply pipe, one end of the liquid inlet pipe and one end of the air inlet pipe all communicate with the liquid storage cavity; a liquid outlet pipe is arranged at the output end of the liquid pump, a cavity is formed in the lifting plate, a flushing head is arranged on the back face of the lifting plate, the other end of the liquid outlet pipe and the front face of the flushing head are both communicated with the cavity, and valves are arranged on the air inlet pipe and the liquid inlet pipe. Water in the liquid storage cavity is converted into ultra-micro bubble water through the bubble water generating device, photovoltaic surface pollutants are efficiently and greenly removed by means of the physical effect of ultra-micro bubbles, and the environment and the body health of workers are protected while water resource waste is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the photovoltaic power generation technical field, especially to a cleaning device for photovoltaic panel. BACKGROUND

[0002] With the deterioration of energy crisis and the enhancement of environmental protection consciousness, people pay more and more attention to clean energy, and solar cells as a mature clean energy application have become a research hotspot in the field of energy. Photovoltaic panel is the most mature photovoltaic device, which is a power generation device that can generate direct current when exposed to sunlight, and is composed of thin solid photovoltaic cells made of almost all semiconductor materials (such as silicon).

[0003] The light transmittance of photovoltaic panel is one of the key factors affecting its power generation efficiency. Since the photovoltaic panel is exposed to outdoor environment for a long time, it is inevitable that the surface of the photovoltaic panel is contaminated, and flying dust, dust, pollen, dirt, leaves and bird droppings are all sources of pollution. The pollution sources attached to the surface of the photovoltaic panel will directly hinder the sunlight from entering the inside of the component, thereby affecting the photoelectric conversion efficiency and reducing the power generation. In order to ensure the normal power generation efficiency of the photovoltaic panel, a cleaning device for the photovoltaic panel is needed.

[0004] In the prior art, chemical detergent solution is often used for cleaning. Such solution requires a large amount of water for cleaning, and the components of the chemical detergent solution pollute water sources and soil. Long-term use will damage the ecological system, and workers who come into contact with the chemical detergent solution have potential health risks, such as skin allergies. If the chemical detergent solution contains perfume ingredients, it may even cause respiratory diseases in workers, directly affecting the health of workers. CONTENT OF THE INVENTION

[0005] The present application provides a cleaning device for photovoltaic panel to solve the technical problem that the inventor realizes that chemical detergent solution is often used for cleaning in the prior art. Such solution requires a large amount of water for cleaning, and the components of the chemical detergent solution pollute water sources and soil. Long-term use will damage the ecological system, and workers who come into contact with the chemical detergent solution have potential health risks, such as skin allergies. If the chemical detergent solution contains perfume ingredients, it may even cause respiratory diseases in workers, directly affecting the health of workers.

[0006] The application provides a cleaning device for photovoltaic panels, which comprises a shell, a limiting cavity is formed in the shell, a threaded rod is movably connected to the top of the inner wall of the limiting cavity, a lifting plate is threadedly connected to the surface of the threaded rod, the surface of the lifting plate is in abutment with the inner wall of the limiting cavity, one side of the lifting plate extends to the outside of the limiting cavity, a driving piece is connected to the other end of the threaded rod which extends to the outside of the shell, a liquid pump and a bubble water generating device are arranged in the shell, the bubble water generating device comprises a liquid storage cavity, an air inlet pipe and a liquid inlet pipe, a liquid supply pipe is arranged at the input end of the liquid pump, one end of the liquid supply pipe, the liquid inlet pipe and the air inlet pipe are in communication with the liquid storage cavity, a liquid outlet pipe is arranged at the output end of the liquid pump, a cavity is formed in the lifting plate, a flushing head is arranged on the back surface of the lifting plate, the other end of the liquid outlet pipe and the front surface of the flushing head are in communication with the cavity, and valves are arranged on the air inlet pipe and the liquid inlet pipe.

[0007] In any of the above technical solutions, further, a placing groove is formed in the lifting plate, and a soft scraper is arranged in the placing groove.

[0008] In any of the above technical solutions, further, a supporting assembly is arranged, the supporting assembly comprises a supporting rod, a supporting seat and a self-locking universal wheel, the supporting rod is threadedly connected to the inner cavity of the supporting seat, the front surface of the supporting rod is movably connected to the back surface of the shell, the self-locking universal wheel is arranged on the back surface of the supporting seat, and a plurality of supporting assemblies are arranged.

[0009] In any of the above technical solutions, further, a liquid level sensor and a controller are arranged in the shell, the liquid level sensor and the liquid pump are electrically connected to the controller, and the liquid level sensor is used for monitoring the liquid level in the liquid storage cavity.

[0010] In any of the above technical solutions, further, a distance sensor is arranged in the shell, the distance sensor is electrically connected to the controller, and the distance sensor is used for monitoring the distance between the lifting plate and the top of the limiting cavity.

[0011] In any of the above technical solutions, further, an alarm is arranged on the front surface of the shell, and the alarm is electrically connected to the controller.

[0012] In any of the above technical solutions, further, a battery is arranged in the shell, the battery is used for supplying power to the liquid pump, the liquid level sensor, the controller, the alarm and the distance sensor, and a charging hole is formed in one side of the shell.

[0013] In any of the foregoing technical solutions, further, a fixed threaded column is threadedly connected to the lifting plate, the fixed threaded column is used for fixing the soft scraper, and a top of the fixed threaded column extends to an outside of the lifting plate.

[0014] In any of the foregoing technical solutions, further, the liquid outlet pipe adopts a bellows structure outside the shell and the lifting plate, and the liquid outlet pipe adopts an elastic material.

[0015] In any of the foregoing technical solutions, further, a front surface of the shell is provided with a liquid level observation window.

[0016] The beneficial effects of the present application mainly include:

[0017] 1. The water in the liquid storage cavity is converted into ultra-micro bubble water, i.e. a gas and water mixed solution with a diameter less than 1 pm and greater than 1 nm, by the bubble water generating device, and the gas in the water is suddenly aggregated to form ultra-micro bubble water by expansion and pressure release. The ultra-micro bubble water is a water that collects energy. With the physical effect of ultra-micro bubbles, when the bubbles in the ultra-micro bubble water move in the water, strong turbulence and eddy current are generated, thereby generating high-speed physical impact and shear force, so as to efficiently and greenly remove the pollutants on the photovoltaic surface, reduce the waste of water resources, and protect the environment and the health of the workers.

[0018] 2. Since part of the photovoltaic panels are directly laid on the preset plane, and part of the photovoltaic panels are inclined relative to the preset plane, the use of the photovoltaic panels is not adapted to different situations. The length of the support rod of the different support assemblies is adjusted to extend to the outside of the support seat according to actual needs, so as to ensure that the lifting plate is parallel to the photovoltaic panel, and the soft scraper can contact the surface of the photovoltaic panel and scrape off the pollutants attached to the surface of the photovoltaic panel during the displacement of the lifting plate.

[0019] It should be understood that both the foregoing general description and the following detailed description are intended for purposes of illustration and description, and are not necessarily limiting of the application. The accompanying drawings are included to provide a further understanding of the subject matter of the application, and are incorporated into and constitute a part of the specification. The specification and drawings together serve the purpose of explaining the principles of the application. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments or prior art technical solutions of the present application, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0021] Figure 1 The structure schematic view (front view cross-sectional view) of the cleaning device of the embodiment of the present application;

[0022] Figure 2 Figure 1 is a schematic view (front view) of the cleaning device structure according to an embodiment of the present application;

[0023] Figure 3 Figure 2 is a schematic view (back view) of the lifting plate and its connecting structure according to an embodiment of the present application;

[0024] Figure 4 Figure 3 is a schematic view (side view) of the cleaning device structure according to an embodiment of the present application;

[0025] Figure 5 Figure 4 is a schematic view (side view) of the soft scraping plate structure according to an embodiment of the present application.

[0026] Figure 1 is a schematic view (front view) of the cleaning device structure according to an embodiment of the present application;

[0027] 100 - housing; 101 - limiting cavity; 102 - threaded rod; 103 - lifting plate; 104 - liquid pump; 105 - liquid storage cavity; 106 - air inlet pipe; 107 - liquid inlet pipe; 108 - liquid supply pipe; 109 - liquid outlet pipe; 110 - cavity; 111 - flushing head; 112 - fixed frame; 113 - extrusion pad; 114 - soft scraping plate; 115 - liquid level sensor; 116 - controller; 117 - distance sensor; 118 - alarm; 119 - battery; 120 - charging hole; 121 - fixed threaded column; 122 - liquid level observation window; 123 - valve; 200 - support rod; 201 - support seat; 202 - self-locking universal wheel. DETAILED DESCRIPTION

[0028] The technical solutions of the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments.

[0029] Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In the description of the application, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0032] Please refer to Figure 1 、 Figure 2 、 Figure 3 And Figure 4 In one or more embodiments, a cleaning device for photovoltaic panel is provided, comprising a shell 100, a limiting cavity 101 is opened in the inside of the shell 100, a threaded rod 102 is movably connected to the top of the inner wall of the limiting cavity 101, a lifting plate 103 is threadedly connected to the surface of the threaded rod 102, the surface of the lifting plate 103 abuts with the inner wall of the limiting cavity 101, one side of the lifting plate 103 extends to the outside of the limiting cavity 101, the other end of the threaded rod 102 extends to the outside of the shell 100 and is connected with a driving member, a liquid pump 104 and a bubble water generating device are arranged in the inside of the shell 100, the bubble water generating device comprises a liquid storage cavity 105, an air inlet pipe 106 and a liquid inlet pipe 107, the input end of the liquid pump 104 is provided with a liquid supply pipe 108, one end of the liquid supply pipe 108, the liquid inlet pipe 107 and the air inlet pipe 106 are in communication with the liquid storage cavity 105, the output end of the liquid pump 104 is provided with a liquid outlet pipe 109, a cavity 110 is opened in the inside of the lifting plate 103, a flushing head 111 is arranged on the back of the lifting plate 103, the other end of the liquid outlet pipe 109 and the front of the flushing head 111 are in communication with the cavity 110, valves 123 are arranged on the air inlet pipe 106 and the liquid inlet pipe 107, the liquid outlet pipe 109 adopts a corrugated pipe structure outside the shell 100 and the lifting plate 103, the liquid outlet pipe 109 adopts an elastic material, a liquid level observation window 122 is arranged on the front of the shell 100.

[0033] In the embodiment, the air inlet pipe 106 and the liquid inlet pipe 107 are connected with the air supply device and the liquid supply device respectively, the valve 123 on the air inlet pipe 106 is controlled to be in a closed state, then the valve 123 on the liquid inlet pipe 107 is controlled to be in an open state, then the liquid inlet pipe 107 is used to inject a proper amount of water into the liquid storage cavity 105, then the valve 123 on the liquid inlet pipe 107 is controlled to be in a closed state, the valve 123 on the air inlet pipe 106 is controlled to be in an open state, the air supply device is used to inject air with a diameter less than 1 μm and greater than 1 nm into the liquid storage cavity 105, then the valve 123 on the air inlet pipe 106 is controlled to be in a closed state, the valve 123 on the liquid inlet pipe 107 is controlled to be in an open state, and the water is pressed into the liquid storage cavity 105 under the water pressure, and part of the air is dissolved in the water to obtain the ultra-micro bubble water. When in use, the shell 100 is placed on one side of the photovoltaic panel, the lifting plate 103 is located above the photovoltaic panel, the threaded rod 102 is driven to rotate by the driving member, then the lifting plate 103 is displaced on the photovoltaic panel, the liquid pump 104 is started during the displacement, and the ultra-micro bubble water pressurized by the liquid pump 104 is sprayed onto the surface of the photovoltaic panel through the liquid supply pipe 108, the liquid outlet pipe 109, the cavity 110 and the flushing head 111, the physical effects of the ultra-micro bubbles are used, that is, when the bubbles in the ultra-micro bubble water move in the water, strong turbulence and eddy current are generated, so that high-speed physical impact and shear force are generated, so that the photovoltaic surface pollutants are removed efficiently and greenly, the water resource waste is reduced, the environment is protected, and the health of the staff is protected. The driving member can be manually operated in the form of a rotating disc, or can be driven by an electric motor. The inner wall of the liquid storage cavity 105 is provided with a plurality of fixing frames 112 for fixing the liquid supply pipe 108, so as to avoid the dislocation of the liquid supply pipe 108 and affect the liquid supply effect.

[0034] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 5 In some embodiments, the lifting plate 103 is internally provided with a placing groove, further comprising a soft scraper 114, the soft scraper 114 is located in the interior of the placing groove, the lifting plate 103 is threadedly connected with a fixed threaded column 121, the fixed threaded column 121 is used for fixing the soft scraper 114, and the top of the fixed threaded column 121 extends to the outside of the lifting plate 103.

[0035] In this embodiment, part of the pollutants has viscosity, and it is difficult to remove by simple flushing. At this time, the soft scraper 114 can be installed, the soft scraper 114 is inserted into the placing groove, the preliminary fixing is realized through the resilience of the soft scraper 114 first, then the fixed threaded column 121 is rotated, the fixed threaded column 121 is displaced to the soft scraper 114, the soft scraper 114 is extruded to realize the fixing; the soft scraper 114 will contact the photovoltaic panel during use, and the pollutants contacted by the ultra-micro bubble water can be scraped off. Since the soft scraper 114 is made of elastic material, the photovoltaic panel surface can be protected while the soft scraper 114 has a certain scraping capacity for the pollutants; the size of the top and bottom of the soft scraper 114 to the middle part of the soft scraper 114 gradually increases, so that the soft scraper 114 can perform scraping action on the photovoltaic panel during the lifting of the lifting plate 103, that is, twice scraping action can be realized by one lifting.

[0036] Please refer to Figure 4 In some embodiments, a support assembly is further included, the support assembly includes a support rod 200, a support seat 201 and a self-locking universal wheel 202, the support rod 200 is threadedly connected to the inner cavity of the support seat 201, the front surface of the support rod 200 is movably connected with the back surface of the shell 100, the self-locking universal wheel 202 is arranged on the back surface of the support seat 201, and the number of the support assemblies is multiple.

[0037] In this embodiment, part of the photovoltaic panel is directly laid on the preset plane, and part of the photovoltaic panel is inclined relative to the preset plane. The use of the photovoltaic panel is not adapted to different situations. According to actual needs, the length of the support rod 200 of different support assemblies extending out of the support seat 201 is adjusted to ensure that the lifting plate 103 is parallel to the photovoltaic panel, and the soft scraper 114 can contact the surface of the photovoltaic panel and scrape off the pollutants attached to the surface of the photovoltaic panel during the displacement of the lifting plate 103.

[0038] Please refer to Figure 1 In some embodiments, the inside of the shell 100 is provided with a liquid level sensor 115 and a controller 116, the liquid level sensor 115 and the liquid pump 104 are electrically connected with the controller 116, the liquid level sensor 115 is used for monitoring the liquid level in the liquid storage cavity 105, the inside of the shell 100 is provided with a distance sensor 117, the distance sensor 117 is electrically connected with the controller 116, the distance sensor 117 is used for monitoring the distance between the lifting plate 103 and the top of the limiting cavity 101, the front surface of the shell 100 is provided with an alarm 118, the alarm 118 is electrically connected with the controller 116, the inside of the shell 100 is provided with a battery 119, the battery 119 is used for supplying power to the liquid pump 104, the liquid level sensor 115, the controller 116, the alarm 118 and the distance sensor 117, and a charging hole 120 is formed in one side of the shell 100.

[0039] In the embodiment, the liquid level sensor 115 monitors the liquid level in the liquid storage cavity 105, so that the staff can know the actual liquid level in the liquid storage cavity 105, and when the liquid level is lower than the set threshold, the alarm 118 is reminded; and the distance sensor 117 monitors the distance between the lifting plate 103 and the top of the limiting cavity 101. Since the displacement limit of the lifting plate 103 is fixed, the lifting plate 103 can be lifted and lowered by pre-setting the threshold value. When the lifting plate 103 is displaced to the maximum distance by the threaded rod 102 driven by the driving member, the alarm 118 is reminded. At this time, the direction is reversed to continue rotating the threaded rod 102, and when the lifting plate 103 is displaced to the minimum distance by the threaded rod 102 driven by the driving member, the alarm 118 is reminded. The direction is reversed again to continue rotating the threaded rod 102, so as to realize the automatic reciprocating lifting action of the lifting plate 103, so as to ensure the cleaning effect of the photovoltaic panel; the battery 119 can power the liquid pump 104, the liquid level sensor 115, the controller 116, the alarm 118, the distance sensor 117 and the corresponding electrical structure, and the charging hole 120 can charge the battery 119.

[0040] It should be noted that the specific model specifications of the liquid pump 104, the liquid level sensor 115, the controller 116, the alarm 118, the distance sensor 117, the battery 119, the gas supply device, the liquid supply device, the driving member and the valve 123 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method uses the existing technology in the art, so it will not be described in detail; its power supply and principle are clear to those skilled in the art, and will not be described in detail here; the connection and installation of each part, the signal transmission principle belong to the known technology in the art.

[0041] Specifically, the working principle of the cleaning device for photovoltaic panels provided by the present application is as follows:

[0042] The gas inlet pipe 106 and the liquid inlet pipe 107 are connected with the gas supply device and the liquid supply device respectively. The valve 123 on the gas inlet pipe 106 is controlled to close the gas inlet pipe 106, then the valve 123 on the liquid inlet pipe 107 is controlled to open the liquid inlet pipe 107, and then the liquid storage cavity 105 is injected with appropriate amount of water through the liquid inlet pipe 107. Then the valve 123 on the liquid inlet pipe 107 is controlled to close the liquid inlet pipe 107, and the valve 123 on the gas inlet pipe 106 is controlled to open the gas inlet pipe 106. The gas supply device is used to introduce gas with a diameter of less than 1 μm and greater than 1 nm into the liquid storage cavity 105, and then the valve 123 on the gas inlet pipe 106 is controlled to close the gas inlet pipe 106. The valve 123 on the liquid inlet pipe 107 is controlled to open the liquid inlet pipe 107 again, and the water is pressed into the liquid storage cavity 105 under the action of water pressure, and part of the air is dissolved and mixed with the air to obtain ultra-micro bubble water.

[0043] Subsequently, the device is transported to a suitable location by means of the self-locking universal wheel 202, and the soft scraper 114 is selectively installed according to the actual situation. When installing, the soft scraper 114 is inserted into the placement groove. First, the preliminary fixation is realized by the resilience of the soft scraper 114. Then, the fixed threaded column 121 is rotated, so that the fixed threaded column 121 is displaced towards the soft scraper 114, and the soft scraper 114 is extruded to realize fixation.

[0044] The length of the support rod 200 of the different support assemblies extending out of the support base 201 is adjusted as needed to ensure that the lifting plate 103 is parallel to the photovoltaic panel, and that the soft scraper 114 can contact the surface of the photovoltaic panel during the displacement of the lifting plate 103.

[0045] The threaded rod 102 is driven to rotate by the driving member, and the lifting plate 103 is displaced on the photovoltaic panel. During the displacement, the liquid pump 104 is started, and the super-micro bubble water pressurized by the liquid pump 104 is sprayed to the surface of the photovoltaic panel through the liquid supply pipe 108, the liquid outlet pipe 109, the cavity 110 and the flushing head 111. By means of the physical effect of the super-micro bubble, when the bubbles in the super-micro bubble water move in the water, strong turbulence and eddy current are generated, thereby generating high-speed physical impact and shear force, so that the photovoltaic surface pollutants are efficiently and greenly removed, water resource waste is reduced, and the environment and the health of the workers are protected.

[0046] The liquid level sensor 115 monitors the liquid level in the liquid storage cavity 105, so that the actual liquid level in the actual liquid storage cavity 105 can be known by the workers. When the liquid level is lower than the set threshold value, the alarm 118 is used for reminding. The distance sensor 117 monitors the distance between the lifting plate 103 and the top of the limiting cavity 101. Since the displacement limit value of the lifting plate 103 is fixed, the threshold value is pre-set, so that the lifting plate 103 can realize lifting operation. When the lifting plate 103 is displaced to the maximum distance by the driving member through the threaded rod 102, the alarm 118 is used for reminding. At this time, the direction is reversed, and the threaded rod 102 is continuously rotated. When the lifting plate 103 is displaced to the minimum distance by the driving member through the threaded rod 102, the alarm 118 is used for reminding. The direction is reversed again, and the threaded rod 102 is continuously rotated, so that the lifting plate 103 realizes automatic reciprocating lifting action, thereby ensuring the cleaning effect of the photovoltaic panel.

[0047] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cleaning device for photovoltaic panels, characterized by, The utility model provides a kind of bubble water machine, including shell, the inside of the shell is opened to limit cavity, the inner wall top of the limit cavity is movably connected with threaded rod, the surface of the threaded rod is threadedly connected with lifting plate, the surface of the lifting plate is in abutment with the inner wall of the limit cavity, the one side of the lifting plate extends to the outside of the limit cavity, the other end of the threaded rod extends to the outside of the shell and is connected with driving element, the inside of the shell is provided with liquid pump and bubble water generating device, the bubble water generating device includes liquid storage cavity, air inlet pipe and liquid inlet pipe, the input end of the liquid pump is provided with liquid supply pipe, the liquid supply pipe, the liquid inlet pipe and the air inlet pipe one end are all communicated with the liquid storage cavity, the output end of the liquid pump is provided with liquid outlet pipe, the inside of the lifting plate is opened to cavity, the back of the lifting plate is provided with flushing head, the other end of the liquid outlet pipe and the front of the flushing head are all communicated with the cavity, and valve is provided on the air inlet pipe and the liquid inlet pipe.

2. A cleaning device for photovoltaic panels according to claim 1, characterized in that, The inside of the lifting plate is opened to placing groove, and further includes soft scraper, and the soft scraper is located in the inside of the placing groove.

3. A cleaning device for photovoltaic panels according to claim 1, characterized in that, Further include support assembly, the support assembly includes support rod, support seat and self-locking universal wheel, the support rod is threadedly connected in the inner cavity of the support seat, the front of the support rod is movably connected with the back of the shell, the self-locking universal wheel is arranged on the back of the support seat, and the number of the support assembly is multiple.

4. A cleaning device for photovoltaic panels according to claim 1, characterized in that, The inside of the shell is provided with liquid level sensor and controller, the liquid level sensor and the liquid pump are electrically connected with the controller, and the liquid level sensor is used to monitor the liquid level in the liquid storage cavity.

5. A cleaning device for photovoltaic panels according to claim 4, characterized in that, The inside of the shell is provided with distance sensor, the distance sensor and the controller are electrically connected, and the distance sensor is used to monitor the distance between the lifting plate and the top of the limit cavity.

6. A cleaning device for photovoltaic panels according to claim 5, characterized in that, The front of the shell is provided with alarm, and the alarm is electrically connected with the controller.

7. A cleaning device for photovoltaic panels according to claim 6, characterized in that, The inside of the shell is provided with battery, the battery is used to power the liquid pump, the liquid level sensor, the controller, the alarm and the distance sensor, and the side of the shell is opened to charging hole.

8. A cleaning device for photovoltaic panels according to claim 2, characterized in that, Threaded connection is carried out on the lifting plate, and fixed threaded column is arranged, the fixed threaded column is used to fix the soft scraper, and the top of the fixed threaded column extends to the outside of the lifting plate.

9. A cleaning device for photovoltaic panels according to claim 1, characterized in that, The outside of the shell and the lifting plate is adopted corrugated pipe structure, and the liquid outlet pipe is adopted elastic material.

10. A cleaning device for photovoltaic panels according to claim 1, characterized in that, The front of the shell is provided with liquid level observation window.

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