Telescopic semi-automatic photovoltaic cleaning device

Abstract

The invention relates to the technical field of photovoltaic cleaning, in particular to a telescopic semi-automatic photovoltaic cleaning device. The device comprises a telescopic hand lever, a liquid storage tank is arranged at the bottom of the telescopic hand lever, a sweeping mechanism is installed at the end, away from the telescopic hand lever, of the liquid storage tank, a limiting ring is arranged on the edge of the bottom of the sweeping mechanism, and a liquid outlet mechanism and a recycling mechanism are arranged on the two sides of the liquid storage tank correspondingly; one end of the liquid outlet mechanism and one end of the recycling mechanism are both communicated with the liquid storage tank, and the ends, away from the liquid storage tank, of the liquid outlet mechanism and the recycling mechanism are both communicated with the bottom of the limiting ring; the liquid outlet mechanism is used for conveying the unused cleaning liquid to the bottom of the sweeping mechanism, and the recycling mechanism is used for recycling the used cleaning liquid into the liquid storage tank; the limiting ring connected with the liquid outlet mechanism and the recycling mechanism is used for maintaining the stability of the cleaning mechanism during operation, the limiting ring can prevent the cleaning liquid from splashing when the cleaning mechanism cleans the photovoltaic panel, and the limiting ring can intercept the used cleaning liquid.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic cleaning, in particular to a retractable semi-automatic photovoltaic cleaning device. Background Art

[0002] Photovoltaic equipment is a photoelectric conversion device that usually needs to be set up outdoors. After a period of wind and rain, a layer of dust and other debris will accumulate on the surface of the photovoltaic panel, thus affecting the power generation efficiency of the photovoltaic equipment. Therefore, it is necessary to continue to clean the debris on its surface. The cleaning methods are mainly divided into: manual, photovoltaic robot and photovoltaic drone.

[0003] However, the above-mentioned prior art methods for cleaning photovoltaic equipment currently have the following disadvantages:

[0004] 1. Disadvantages of conventional manual cleaning: When performing manual cleaning on photovoltaic solar panels, the surface of the photovoltaic glass may be damaged due to improper cleaning methods, improper cleaning tools or human factors. Manual cleaning requires a lot of manpower, is labor-intensive, time-consuming and labor-intensive. The effect of manual cleaning may be uneven and there may be unevenness.

[0005] 2. Disadvantages of photovoltaic robot cleaning: The maintenance and upkeep of photovoltaic cleaning robots require high costs. Photovoltaic cleaning robots rely on machine vision technology and control systems, but these technologies are not yet mature and are costly. Photovoltaic cleaning robots are suitable for flat photovoltaic power stations, but the cleaning effect is not ideal for ground-based power stations with large left-right height differences, special shapes or installation positions.

[0006] 3. Disadvantages of photovoltaic drone cleaning: High-quality drone cleaning equipment is expensive, and a good device may cost thousands or even tens of thousands of yuan. Remote control problems with the equipment may cause the equipment to stay on the photovoltaic panel when a problem occurs, affecting the power generation of the power station. When the left and right height difference of the photovoltaic ground power station is large, the crossing function of the drone is required to be high, and its use is limited in scenarios such as mountain photovoltaic and household photovoltaic.

[0007] In view of this, we propose a retractable semi-automatic photovoltaic cleaning device to improve the shortcomings of the existing technology. Summary of the invention

[0008] In view of the technical problems existing in the prior art, the present invention provides a retractable semi-automatic photovoltaic cleaning device to solve the problems of time-consuming and labor-intensive manual cleaning and high cost and technical requirements of machine cleaning in the above-mentioned background technology.

[0009] In order to solve the above-mentioned problems, the technical solution of the present invention is as follows: a telescopic semi-automatic photovoltaic cleaning device, comprising a telescopic hand rod, a liquid storage tank is provided at the bottom of the telescopic hand rod, a cleaning mechanism is installed at one end of the liquid storage tank away from the telescopic hand rod, a limiting ring is provided at the bottom edge of the cleaning mechanism, a liquid discharge mechanism and a recovery mechanism are respectively provided on both sides of the liquid storage tank, one end of the liquid discharge mechanism and the recovery mechanism are both connected to the liquid storage tank, and the ends of the liquid discharge mechanism and the recovery mechanism away from the liquid storage tank are both connected to the bottom of the limiting ring;

[0010] The liquid storage tank is used to store the cleaning liquid before and after use, and the cleaning mechanism is used to clean the debris on the surface of the photovoltaic panel;

[0011] The liquid discharge mechanism is used to transport unused cleaning liquid to the bottom of the cleaning mechanism, and the recovery mechanism is used to recover the used cleaning liquid into the liquid storage tank;

[0012] The limiting rings connected to the liquid discharge mechanism and the recovery mechanism are used to maintain the stability of the cleaning mechanism during operation. The limiting rings can prevent the cleaning liquid from splashing when the cleaning mechanism cleans the photovoltaic panel, and the limiting rings can intercept the cleaning liquid after use.

[0013] When the cleaning mechanism starts to operate, the driving force of the cleaning mechanism during rotation can release unused cleaning liquid to the surface of the photovoltaic panel. When the cleaning mechanism stops operating, the liquid discharge mechanism that loses the driving force of the cleaning mechanism automatically stops releasing unused cleaning liquid.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. In the retractable semi-automatic photovoltaic cleaning device, a liquid storage tank is provided for storing cleaning liquid before and after use, and a cleaning mechanism is used to clean debris on the surface of the photovoltaic panel; a liquid discharge mechanism is used to transport unused cleaning liquid to the bottom of the cleaning mechanism, and a recovery mechanism is used to recover the used cleaning liquid into the liquid storage tank; limit rings respectively connected to the liquid discharge mechanism and the recovery mechanism are used to maintain the stability of the cleaning mechanism during operation, and the limit rings can prevent the cleaning liquid from splashing when the cleaning mechanism cleans the photovoltaic panel, and the limit rings can intercept the used cleaning liquid.

[0016] 2. In the retractable semi-automatic photovoltaic cleaning device, when the cleaning mechanism starts to run, the driving force of the cleaning mechanism during rotation can release the unused cleaning liquid to the surface of the photovoltaic panel. When the cleaning mechanism stops running, the liquid discharge mechanism that loses the driving force of the cleaning mechanism automatically stops releasing the unused cleaning liquid.

[0017] On the basis of the above technical solution, the present invention can also make the following improvements:

[0018] As a further improvement of the technical solution, a partition is provided inside the liquid storage tank, and the partition and the inner wall of the liquid storage tank respectively form a cleaning chamber and a recovery chamber.

[0019] The beneficial effect of adopting the above-mentioned improvement scheme is that after the cleaning liquid finishes scrubbing the surface of the photovoltaic panel, it can be promptly recovered into the recovery chamber by the recovery mechanism, thereby preventing the used cleaning liquid from flowing to other components of the photovoltaic device and damaging the device.

[0020] As a further improvement of the present technical solution, the cleaning mechanism includes a mounting base fixedly connected to the bottom of the liquid storage tank, the mounting base is rotatably connected to a main rod on the side away from the liquid storage tank, the end of the main rod away from the mounting base is coaxially connected to a cleaning disc, and the main rod is driven by a motor.

[0021] This cleaning mechanism adopts the existing technology, which will not be described in detail here.

[0022] As a further improvement of the technical solution, a plurality of liquid outlet holes are provided on the edge of the cleaning disk.

[0023] As a further improvement of the technical solution, the limiting ring is rotatably connected to the edge of the cleaning disc, and a retaining edge is provided at the bottom of the limiting ring.

[0024] As a further improvement of the present technical solution, the liquid outlet mechanism includes a liquid outlet pipe connected to the cleaning chamber, the end of the liquid outlet pipe away from the cleaning chamber is fixedly connected to the limiting ring, the liquid outlet pipe is connected to the bottom of the cleaning disk, and a trigger switch is provided in the liquid outlet pipe.

[0025] The beneficial effect of adopting the above-mentioned improvement scheme is that when the cleaning disc starts to rotate to clean the stains on the surface of the photovoltaic panel, the multiple liquid outlet holes arranged at intervals continuously sweep the bottom of the trigger switch. When the bottom of the trigger switch is squeezed out of the liquid outlet hole, the unused cleaning liquid in the cleaning chamber flows downward along the liquid outlet pipe, and then passes through the liquid outlet and flows to the surface of the photovoltaic panel (always in the limit ring), cooperating with the rotating cleaning disc to remove the stubborn stains on the surface of the photovoltaic panel.

[0026] As a further improvement of the present technical solution, the trigger switch includes a fixing bolt fixedly connected to the inner wall of the liquid outlet pipe, the end of the fixing bolt close to the limiting ring is fixedly connected to a spring, the end of the spring away from the fixing bolt is fixedly connected to a switch body, when the spring is in a natural state, the end of the switch body away from the spring is located in the liquid outlet hole, the outside of the spring is provided with a protective cover for sealing the spring, the protective cover is slidably connected to the fixing bolt, and the part of the switch body located in the liquid outlet pipe 310 is truncated cone-shaped.

[0027] As a further improvement of the technical solution, a plurality of water-passing notches are provided at the edge of one end of the switch body close to the fixing bolt and at the edge of the fixing bolt, and the outer diameter of the protective cover is smaller than the inner diameter of the liquid outlet pipe.

[0028] The beneficial effect of adopting the above-mentioned improved scheme is that when the tail of the switch body is squeezed out of the liquid outlet hole by the rotating cleaning disk, the truncated cone part of the switch body will be separated from the bottom of the liquid outlet pipe due to being squeezed, so that the unused cleaning liquid in the liquid outlet pipe will pass through the water gap, and then pass through the gap between the truncated cone part of the switch body and the bottom of the liquid outlet pipe, and then flow into the inside of the limit ring. During this period, the spring is compressed due to being squeezed, and when the liquid outlet hole rotates to the bottom of the switch body, the tail of the switch body is pushed into the liquid outlet hole under the action of the spring restoring force, so that the cleaning liquid flows to the surface of the photovoltaic panel. So on and so forth, so that when the cleaning disk cleans the photovoltaic panel, it can automatically draw out the unused cleaning liquid from the cleaning chamber to work together. After the cleaning is completed, the control motor gradually reduces the speed of the cleaning disk, and when the staff hears the tail of the switch body stuck in the liquid outlet hole, a crisp "click" sound is emitted, and then the power of the motor is turned off, and the cleaning liquid in the cleaning chamber no longer flows to the bottom of the limit ring.

[0029] As a further improvement of the present technical solution, the recovery mechanism includes a water pump and a recovery pipe, the water inlet of the water pump is connected to the recovery pipe, the water outlet of the water pump is connected to the recovery chamber, and a suction cup is provided at one end of the recovery pipe away from the water pump.

[0030] As a further improvement of the technical solution, the material of the retaining edge is a colloid sealing material. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0032] Figure 2 It is a partially cutaway perspective view of the present invention;

[0033] Figure 3 It is a cutaway front view of the present invention as a whole in a horizontal position;

[0034] Figure 4 is a cutaway perspective view of the cleaning mechanism of the present invention;

[0035] Figure 5 is a cutaway perspective view of the liquid outlet mechanism of the present invention;

[0036] Figure 6 is a cutaway perspective view of the recovery mechanism of the present invention;

[0037] Figure 7 For the present invention Figure 6 The enlarged view of point B in the middle;

[0038] Figure 8 is a cutaway front view of the trigger switch of the present invention;

[0039] Fig. 9 For the present invention Figure 2 The enlarged view of point A in the middle;

[0040] Fig.10 is a cutaway perspective view of a trigger switch of the present invention;

[0041] Fig.11 It is a top view of the trigger switch of the present invention.

[0042] The meaning of each number in the figure is:

[0043] 100, telescopic handle; 110, liquid storage tank; 111, partition; 112, cleaning chamber; 113, recovery chamber; 120, limit ring; 121, retaining edge;

[0044] 200, cleaning mechanism; 210, mounting seat; 220, main rod; 230, cleaning disc; 240, liquid outlet;

[0045] 300, liquid outlet mechanism; 310, liquid outlet pipe; 320, trigger switch; 321, fixing bolt; 322, switch body; 323, protective cover; 324, spring;

[0046] 400. Recovery mechanism; 410. Water pump; 420. Recovery pipe; 430. Suction cup. DETAILED DESCRIPTION

[0047] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0048] See also Figure 1-Figure 3 As shown, the purpose of this embodiment is to provide a retractable semi-automatic photovoltaic cleaning device, including a retractable handle 100, a liquid storage tank 110 is provided at the bottom of the retractable handle 100, a cleaning mechanism 200 is installed at one end of the liquid storage tank 110 away from the retractable handle 100, a limiting ring 120 is provided at the bottom edge of the cleaning mechanism 200, and a liquid discharge mechanism 300 and a recovery mechanism 400 are respectively provided on both sides of the liquid storage tank 110, one end of the liquid discharge mechanism 300 and the recovery mechanism 400 are both connected to the liquid storage tank 110, and the ends of the liquid discharge mechanism 300 and the recovery mechanism 400 away from the liquid storage tank 110 are both connected to the bottom of the limiting ring 120;

[0049] The liquid storage tank 110 is used to store the cleaning liquid before and after use, and the cleaning mechanism 200 is used to clean the debris on the surface of the photovoltaic panel;

[0050] The liquid discharge mechanism 300 is used to deliver the unused cleaning liquid to the bottom of the cleaning mechanism 200, and the recovery mechanism 400 is used to recover the used cleaning liquid into the liquid storage tank 110;

[0051] The limiting ring 120 connected to the liquid discharge mechanism 300 and the recovery mechanism 400 is used to maintain the stability of the cleaning mechanism 200 during operation. The limiting ring 120 can prevent the cleaning liquid from splashing when the cleaning mechanism 200 cleans the photovoltaic panel, and the limiting ring 120 can intercept the cleaning liquid after use;

[0052] When the cleaning mechanism 200 starts running, the driving force of the cleaning mechanism 200 during rotation can release unused cleaning liquid to the surface of the photovoltaic panel. When the cleaning mechanism 200 stops running, the liquid discharge mechanism 300 automatically stops releasing unused cleaning liquid due to the loss of the driving force of the cleaning mechanism 200.

[0053] Working principle: First, fill the liquid storage tank 110 with unused cleaning liquid, and then the operator holds the telescopic handle 100 to make the bottom of the limit ring 120 fit the upper surface of the photovoltaic panel to be cleaned.

[0054] Next, the cleaning mechanism 200 is started to clean the debris (such as dust, etc.) attached to the surface of the photovoltaic panel.

[0055] When the cleaning mechanism 200 cleans the photovoltaic panel, one side of the liquid outlet mechanism 300 is kept facing upward and one side of the recovery mechanism 400 is kept facing downward. The cleaning mechanism 200 in operation guides the unused cleaning liquid to the surface of the photovoltaic panel, and the cleaning liquid cooperates with the cleaning mechanism 200 to remove the stubborn stains on the surface of the photovoltaic panel. After the cleaning is completed, the cleaning liquid is held by the limit ring 120 and then drawn back into the liquid storage tank 110 by the recovery mechanism 400.

[0056] During the entire process of the cleaning liquid flowing from the liquid storage tank 110 to the surface of the photovoltaic panel and then being recovered to the liquid storage tank 110 after cleaning, the cleaning liquid is inside the limiting ring 120. This can prevent the cleaning liquid from splashing during cleaning and facilitate the recovery of the used cleaning liquid after cleaning.

[0057] Finally, the power of the cleaning mechanism 200 is turned off, and the liquid discharge mechanism 300 which loses its driving force automatically stops discharging the cleaning liquid.

[0058] exist Figure 2 and Figure 3 In the embodiment, a partition 111 is provided inside the liquid storage tank 110, and the partition 111 of the suction cup 430 and the inner wall of the liquid storage tank 110 respectively form a cleaning chamber 112 and a recovery chamber 113.

[0059] That is to say, after the cleaning liquid finishes scrubbing the surface of the photovoltaic panel, it can be promptly recovered into the recovery chamber 113 by the recovery mechanism 400, thereby preventing the used cleaning liquid from flowing to other components of the photovoltaic device and damaging the device.

[0060] In order to clean the attached objects on the surface of the photovoltaic panel, a semi-automatic cleaning mechanism 200 driven by a motor is used. Figure 4 As shown, the cleaning mechanism 200 includes a mounting base 210 fixedly connected to the bottom of the liquid storage tank 110, and the suction cup 430 mounting base 210 is rotatably connected to a main rod 220 on a side away from the liquid storage tank 110, and the suction cup 430 main rod 220 is coaxially connected to a cleaning disc 230 at one end away from the mounting base 210, and the suction cup 430 main rod 220 is driven by a motor.

[0061] The improvement lies in that a plurality of liquid outlet holes 240 are provided on the edge of the cleaning plate 230 .

[0062] It should be noted that the output shaft of the motor is coaxially connected to the main rod 220. After the bottom of the limit ring 120 is placed against the surface of the photovoltaic panel and the position is adjusted (the liquid discharging mechanism 300 is facing upward and the recovery mechanism 400 is facing downward), the power of the motor is turned on, and the motor drives the main rod 220 to rotate. The main rod 220 then drives the cleaning disk 230 to rotate within the limit ring 120. Therefore, under the action of the friction force of the cleaning disk 230, impurities such as dust on the surface of the photovoltaic panel are removed.

[0063] In some areas with serious air pollution, the surface of the photovoltaic panel may be covered with dirt formed by oil smoke, chemical smoke and other components. These stubborn stains adhere to the surface of the photovoltaic panel. If the cleaning disc 230 rotates too slowly, the friction is insufficient to remove them. If the cleaning disc 230 rotates too fast, it is easy to cause wear on the surface of the photovoltaic panel. Therefore, a liquid discharge mechanism 300 is provided to be used together with the cleaning disc 230.

[0064] Next, through Figure 5 The specific structure of the liquid outlet mechanism 300 is disclosed. The liquid outlet mechanism 300 includes a liquid outlet pipe 310 connected to the cleaning chamber 112. The end of the liquid outlet pipe 310 of the suction cup 430 away from the cleaning chamber 112 is fixedly connected to the limiting ring 120. The liquid outlet pipe 310 of the suction cup 430 is connected to the bottom of the cleaning plate 230. A trigger switch 320 is provided in the liquid outlet pipe 310 of the suction cup 430.

[0065] That is to say, when the cleaning disc 230 starts to rotate to clean the stains on the surface of the photovoltaic panel, the multiple liquid outlet holes 240 arranged at intervals continuously sweep the bottom of the trigger switch 320. When the bottom of the trigger switch 320 is squeezed out of the liquid outlet hole 240, the unused cleaning liquid in the cleaning chamber 112 flows downward along the liquid outlet pipe 310, and then flows through the liquid outlet hole 240 to the surface of the photovoltaic panel (always in the limit ring 120), cooperating with the rotating cleaning disc 230 to remove the stubborn stains on the surface of the photovoltaic panel.

[0066] It should be noted that the active ingredients (such as surfactants) in the cleaning solution can react chemically with the dirt to decompose and dissolve it, making it easier for the dust and dirt to be removed by the cleaning disk 230. Cleaning solutions containing non-ionic surfactants can effectively reduce the adhesion between dirt and the surface of the photovoltaic panel.

[0067] Moreover, the cleaning liquid can soften the dust that has accumulated for a long time, especially the dust that has been soaked by rain or dew and then dried. Dust particles are relatively hard in a dry state, and have a strong bond with the surface of the photovoltaic panel, which can easily scratch the photovoltaic panel during cleaning. The cleaning liquid can penetrate between the dust particles, making their structure loose, so that they are easier to be removed by the cleaning disk 230, reducing the possibility of damage to the surface of the photovoltaic panel during the cleaning process.

[0068] At the same time, the cleaning liquid forms a lubricating film on the surface of the photovoltaic panel. When the cleaning disc 230 (which can also be replaced with cleaning tools such as brushes) moves on the surface, this lubricating film can reduce the friction coefficient between the tool and the photovoltaic panel.

[0069] Since the cleaning liquid contains a variety of chemical components, such as surfactants, corrosion inhibitors, etc. If these cleaning liquids are directly discharged into the environment, especially when the photovoltaic panels are located in areas close to soil or water bodies, the cleaning liquids will penetrate into the soil or flow into nearby rivers, lakes, and other water bodies. Therefore, a recovery mechanism 400 is provided to recover the used cleaning liquid.

[0070] like Figure 6 and Figure 7 As shown, the specific structure of the recovery mechanism 400 is then disclosed. The recovery mechanism 400 includes a water pump 410 and a recovery pipe 420. The water inlet of the suction cup 430 water pump 410 is connected to the recovery pipe 420, the water outlet of the suction cup 430 water pump 410 is connected to the recovery chamber 113, and the suction cup 430 recovery pipe 420 is provided with a suction cup 430 at one end away from the water pump 410.

[0071] It should be noted that the limiting ring 120 is rotatably connected to the edge of the cleaning disc 230 , and a retaining edge 121 is provided at the bottom of the limiting ring 120 of the suction cup 430 .

[0072] The material of the retaining edge 121 is a colloid sealing material.

[0073] That is to say, after the cleaning liquid cooperates with the cleaning disc 230 to complete the cleaning of the photovoltaic panel, it flows downward under the action of its own gravity and is intercepted by the retaining edge 121 at the lower end (the photovoltaic panel is usually set at an angle). At this time, the suction force generated by the water pump 410 will extract the used cleaning liquid, and the cleaning liquid will eventually return to the recovery chamber 113 along the path of: suction cup 430, recovery pipe 420 and water pump 410.

[0074] Through the above description of the function of the liquid outlet pipe 310, Figure 8-Figure 11 The internal structure of the trigger switch 320 is further disclosed. The trigger switch 320 includes a fixing bolt 321 fixedly connected to the inner wall of the liquid outlet pipe 310. The end of the fixing bolt 321 of the suction cup 430 close to the limiting ring 120 is fixedly connected to the spring 324. The end of the spring 324 of the suction cup 430 away from the fixing bolt 321 is fixedly connected to the switch body 322. When the spring 324 of the suction cup 430 is in a natural state, the end of the switch body 322 of the suction cup 430 away from the spring 324 is located in the liquid outlet hole 240. A protective cover 323 for sealing the spring 324 is provided on the outside of the spring 324 of the suction cup 430. The protective cover 323 of the suction cup 430 is slidably connected to the fixing bolt 321. The part of the switch body 322 of the suction cup 430 located in the liquid outlet pipe 310 is truncated cone-shaped.

[0075] It should be noted that a plurality of water-passing notches are provided at the edge of one end of the switch body 322 close to the fixing bolt 321 and at the edge of the fixing bolt 321 , and the outer diameter of the protective cover 323 of the suction cup 430 is smaller than the inner diameter of the liquid outlet pipe 310 .

[0076] That is to say, when the cleaning disc 230 starts to rotate, the multiple liquid outlet holes 240 located at the edge of the cleaning disc 230 continuously sweep the tail of the switch body 322. Then the following situation will occur: when the tail of the switch body 322 is squeezed out of the liquid outlet hole 240 by the rotating cleaning disc 230, the truncated cone part of the switch body 322 will be separated from the bottom of the liquid outlet pipe 310 due to being squeezed. At this time, the truncated cone part of the switch body 322 that was originally tightly fitted is separated from the bottom of the liquid outlet pipe 310, so that the unused cleaning liquid in the liquid outlet pipe 310 will pass through the water-passing gap, and then pass through the gap between the truncated cone part of the switch body 322 and the bottom of the liquid outlet pipe 310, and then flow into the interior of the limit ring 120 (the opening where the tail of the switch body 322 is located). During this period, the spring 324 is compressed due to being squeezed. When the liquid outlet 240 rotates to the bottom of the switch body 322, the tail of the switch body 322 is pushed into the liquid outlet 240 under the action of the restoring force of the spring 324, and the cleaning liquid flows to the surface of the photovoltaic panel. This reciprocating process is implemented, so that when the cleaning disc 230 cleans the photovoltaic panel, the unused cleaning liquid can be automatically drawn out from the cleaning chamber 112 for coordination. After the cleaning is completed, the control motor gradually reduces the speed of the cleaning disc 230 (a servo motor with an adjustable speed can be used). When the staff hears a crisp "click" sound when the tail of the switch body 322 is stuck in the liquid outlet 240, the power of the motor is turned off. At this time, the cleaning liquid in the cleaning chamber 112 no longer flows to the bottom of the limit ring 120.

[0077] In summary, the working principle of the present invention is as follows:

[0078] First, the cleaning chamber 112 is filled with unused cleaning liquid, and then the operator holds the telescopic handle 100 to make the retaining edge 121 fit the upper surface of the photovoltaic panel to be cleaned.

[0079] Next, adjust the position of the bottom of the limit ring 120 against the surface of the photovoltaic panel (with the liquid pipe 310 facing upward and the recovery pipe 420 facing downward), turn on the power of the motor, and the motor drives the main rod 220 to rotate. The main rod 220 then drives the cleaning disk 230 to rotate within the limit ring 120. Therefore, under the action of the friction force of the cleaning disk 230, dust and other impurities on the surface of the photovoltaic panel are removed.

[0080] During the process of the cleaning disc 230 cleaning the photovoltaic panel, the rotating cleaning disc 230 guides the unused cleaning liquid to the surface of the photovoltaic panel. The cleaning liquid cooperates with the cleaning disc 230 to remove the stubborn stains on the surface of the photovoltaic panel. After the cleaning is completed, it flows downward under the action of its own gravity and is intercepted by the retaining edge 121 at the lower end. At this time, the suction force generated by the water pump 410 extracts the used cleaning liquid, and the cleaning liquid finally returns to the recovery chamber 113.

[0081] During the entire process of the cleaning liquid flowing from the cleaning chamber 112 to the surface of the photovoltaic panel and then being recovered to the recovery chamber 113 after cleaning, the cleaning liquid is inside the retaining edge 121 of the limiting ring 120. This can prevent the cleaning liquid from splashing during cleaning and facilitate the recovery of the used cleaning liquid after cleaning.

[0082] During the process of cleaning the photovoltaic panel surface by the cleaning disk 230, when the tail of the switch body 322 is squeezed out of the liquid outlet 240 by the rotating cleaning disk 230, the truncated cone part of the switch body 322 will be separated from the bottom of the liquid outlet pipe 310 due to the squeezing. At this time, the truncated cone part of the switch body 322 that was originally tightly fitted is separated from the bottom of the liquid outlet pipe 310, so that the unused cleaning liquid in the liquid outlet pipe 310 will pass through the water gap, and then pass through the gap between the truncated cone part of the switch body 322 and the bottom of the liquid outlet pipe 310, and then flow into the interior of the limit ring 120 (the opening where the tail of the switch body 322 is located). During this period, the spring 324 is compressed due to the squeezing. When the liquid outlet 240 rotates to the right below the switch body 322, the tail of the switch body 322 is pushed into the liquid outlet 240 under the action of the restoring force of the spring 324, so that the cleaning liquid flows to the surface of the photovoltaic panel. This reciprocating process ensures that when the cleaning disc 230 cleans the photovoltaic panel, unused cleaning liquid can be automatically drawn out from the cleaning chamber 112 for use in the work.

[0083] Finally, after cleaning is completed, the control motor gradually reduces the speed of the cleaning disc 230 (a servo motor with adjustable speed can be used). When the staff hears a crisp "click" sound when the tail of the switch body 322 is stuck in the liquid outlet 240, the power of the motor is turned off.

[0084] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A retractable semi-automatic photovoltaic cleaning device, comprising a retractable handle (100), characterized in that: A liquid storage tank (110) is provided at the bottom of the telescopic handle (100); a cleaning mechanism (200) is installed at one end of the liquid storage tank (110) away from the telescopic handle (100); a limiting ring (120) is provided at the bottom edge of the cleaning mechanism (200); a liquid discharge mechanism (300) and a recovery mechanism (400) are respectively provided on both sides of the liquid storage tank (110); one end of each of the liquid discharge mechanism (300) and the recovery mechanism (400) is communicated with the liquid storage tank (110); and one end of each of the liquid discharge mechanism (300) and the recovery mechanism (400) away from the liquid storage tank (110) is communicated with the bottom of the limiting ring (120); The liquid storage tank (110) is used to store cleaning liquid before and after use, and the cleaning mechanism (200) is used to clean debris on the surface of the photovoltaic panel; The liquid discharge mechanism (300) is used to transport unused cleaning liquid to the bottom of the cleaning mechanism (200), and the recovery mechanism (400) is used to recover the used cleaning liquid into the liquid storage tank (110); The limiting ring (120) connected to the liquid discharge mechanism (300) and the recovery mechanism (400) is used to maintain the stability of the cleaning mechanism (200) during operation; the limiting ring (120) can prevent the cleaning liquid from splashing when the cleaning mechanism (200) cleans the photovoltaic panel, and the limiting ring (120) can intercept the cleaning liquid after use; When the cleaning mechanism (200) starts to operate, the driving force of the cleaning mechanism (200) during rotation can discharge unused cleaning liquid onto the surface of the photovoltaic panel; when the cleaning mechanism (200) stops operating, the liquid discharge mechanism (300) automatically stops discharging unused cleaning liquid after losing the driving force of the cleaning mechanism (200).

2. The retractable semi-automatic photovoltaic cleaning device according to claim 1 is characterized in that: A partition (111) is provided inside the liquid storage tank (110), and the partition (111) and the inner wall of the liquid storage tank (110) respectively form a cleaning chamber (112) and a recovery chamber (113).

3. The retractable semi-automatic photovoltaic cleaning device according to claim 2 is characterized in that: The cleaning mechanism (200) comprises a mounting seat (210) fixedly connected to the bottom of the liquid storage tank (110); the mounting seat (210) is rotatably connected to a main rod (220) at a side away from the liquid storage tank (110); one end of the main rod (220) away from the mounting seat (210) is coaxially connected to a cleaning disc (230); and the main rod (220) is driven by a motor.

4. The retractable semi-automatic photovoltaic cleaning device according to claim 3 is characterized in that: The edge of the cleaning disc (230) is provided with a plurality of liquid outlet holes (240).

5. The retractable semi-automatic photovoltaic cleaning device according to claim 3 is characterized in that: The limiting ring (120) is rotatably connected to the edge of the cleaning disc (230), and a retaining edge (121) is provided at the bottom of the limiting ring (120).

6. The retractable semi-automatic photovoltaic cleaning device according to claim 3 is characterized in that: The liquid outlet mechanism (300) comprises a liquid outlet pipe (310) connected to the cleaning chamber (112); one end of the liquid outlet pipe (310) away from the cleaning chamber (112) is fixedly connected to the limit ring (120); the liquid outlet pipe (310) is connected to the bottom of the cleaning plate (230); and a trigger switch (320) is provided in the liquid outlet pipe (310).

7. The retractable semi-automatic photovoltaic cleaning device according to claim 6 is characterized in that: The trigger switch (320) comprises a fixing bolt (321) fixedly connected to the inner wall of the liquid outlet pipe (310); one end of the fixing bolt (321) close to the limiting ring (120) is fixedly connected to a spring (324); one end of the spring (324) away from the fixing bolt (321) is fixedly connected to a switch body (322); when the spring (324) is in a natural state, one end of the switch body (322) away from the spring (324) is located in the liquid outlet hole (240); a protective cover (323) for sealing the spring (324) is sleeved on the outside of the spring (324); the protective cover (323) is slidably connected to the fixing bolt (321); and the part of the switch body (322) located in the liquid outlet pipe (310) is truncated cone-shaped.

8. The retractable semi-automatic photovoltaic cleaning device according to claim 7 is characterized in that: A plurality of water-passing notches are provided at the edge of one end of the switch body (322) close to the fixing bolt (321) and at the edge of the fixing bolt (321), and the outer diameter of the protective cover (323) is smaller than the inner diameter of the liquid outlet pipe (310).

9. The retractable semi-automatic photovoltaic cleaning device according to claim 2, characterized in that: The recovery mechanism (400) comprises a water pump (410) and a recovery pipe (420), wherein a water inlet of the water pump (410) is connected to the recovery pipe (420), a water outlet of the water pump (410) is connected to the recovery chamber (113), and a suction cup (430) is provided at one end of the recovery pipe (420) away from the water pump (410).

10. The retractable semi-automatic photovoltaic cleaning device according to claim 5, characterized in that: The material of the retaining edge (121) is a colloid sealing material.

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