Water pump control mechanism for automatic cleaning of photovoltaic panel

Abstract

The utility model belongs to the field of photovoltaic panel cleaning, and discloses a water pump control mechanism for automatic cleaning of a photovoltaic panel, the mechanism comprises a filter box arranged on the lower side of the photovoltaic panel and a center shaft rotatably and slidably arranged at an opening of the filter box, the center shaft is provided with a filter plate, and the filter plate can cover the opening of the filter box when horizontal. One end of the central shaft extends out of the filter box, a power connection column capable of electrifying the water pump is arranged above the end part of the central shaft of the filter box, and after the photovoltaic panel is washed once, the filter plate rotates downwards under the gravity influence of impurities in cleaning liquid after filtering the cleaning liquid, so that one end, extending out of the filter box, of the central shaft is warped upwards and is in contact with the power connection column to electrify the water pump; and the photovoltaic panel is flushed again by the water pump.

Description

Technical Field

[0001] The present application belongs to the field of photovoltaic panel cleaning, and in particular relates to a water pump control mechanism for automatic photovoltaic panel cleaning. Background Art

[0002] The main principle of photovoltaic power generation is to use the photoelectric effect of semiconductors to form electric current. Placing solar photovoltaic panels made of semiconductors in areas with excellent lighting conditions can give full play to the advantages of photovoltaic power generation. However, photovoltaic panels are placed in the wild all year round, and the number is huge, which makes it inconvenient to carry out cleaning and maintenance work. When the surface of photovoltaic panels is contaminated by pollutants such as floating dust, bird droppings, and rain stains, its photoelectric conversion efficiency will be greatly reduced. When the surface of photovoltaic panels cannot be cleaned and kept clean in time, it will not only cause energy waste, but also gradually reduce the power generation of photovoltaic panels.

[0003] In the prior art, a Chinese utility model with publication number CN211304152U discloses a photovoltaic panel cleaning device, which includes a base, a fixing frame fixedly connected to the top of the base, a recovery mechanism provided on the front of the fixing frame, and a cleaning mechanism provided on the top of the photovoltaic panel fixing frame; the device fixes the photovoltaic panel through the fixing frame, the cleaning mechanism rinses the photovoltaic panel from above, and the water flows along the surface of the photovoltaic panel into the recovery mechanism, and a filter and a scraper are provided in the recovery mechanism, and the impurities on the filter can be scraped off by driving the scraper to move, and the water filtered by the filter can be recycled, which solves the problem of excessive waste of water resources in cleaning photovoltaic panels. However, the device has the following problems: the cleaning mechanism can only clean the photovoltaic panel regularly, and it is impossible to judge whether the photovoltaic panel is cleaned after one cleaning; when the photovoltaic panel is not thoroughly cleaned for the first time within a certain period of time, it is impossible to repeat the cleaning of the photovoltaic panel in a short time, so that the impurities on the photovoltaic panel are significantly reduced. Summary of the invention

[0004] Based on the above-mentioned background technical needs, the present application provides a water pump control mechanism for automatic cleaning of photovoltaic panels, which can detect the cleaning effect of photovoltaic panels while reducing the waste of water resources. When the cleaning effect is not good once, the photovoltaic panels can be quickly and automatically repeated to improve the cleanliness of the photovoltaic panels after cleaning.

[0005] In order to achieve the above purpose, the technical solution of this application is:

[0006] A water pump control mechanism for automatic cleaning of photovoltaic panels, a filter box and a filter plate, the filter box is arranged below the photovoltaic panel for collecting photovoltaic panel cleaning liquid, the filter box is arranged to be open upwards on one side adjacent to the photovoltaic panel, and the filter plate covers the open part of the filter box; a positioning block is arranged on one side outside the open part of the filter box, the positioning block is provided with a slide groove along the gravity direction, a central axis is penetrated on two opposite sides of the filter plate, a rotating shaft is arranged in the slide groove perpendicular to the axial direction of the central axis, the central axis passes through the slide groove and is rotatably or slidably connected with the rotating shaft, and the central axis can The filter box can swing around the rotating shaft; a conductive block is provided at one end of the central axis adjacent to the slide slot, a first power pole is provided on the upward moving path of the conductive block, and the first power pole is electrically connected to a water pump for cleaning the photovoltaic panel; an end of the central axis away from the conductive block is slidably connected to the inner wall of the filter box up and down, and a first driving spring is provided in the vertical direction on the side of the filter box away from the positioning block, a first ball is provided on the top of the first driving spring, the first ball is in contact with the central axis, and the first driving spring is used to support the central axis upward.

[0007] Preferably, a wedge block is provided at one end of the central axis away from the conductive block, and the wedge block is slidably connected to the filter box up and down; and a second driving spring is provided in the horizontal direction on the side of the filter box away from the positioning block, and a second ball is provided at one end of the second driving spring, and the second ball is in contact with the wedge block.

[0008] Preferably, the water pump control mechanism also includes a filter plate drive assembly, the filter plate drive assembly includes a first drive motor, the first drive motor is arranged above the positioning block, and a first drive wheel is provided at one end of the drive shaft of the first drive motor, an auxiliary drive wheel is sleeved on the central axis adjacent to the first drive wheel, the auxiliary drive wheel is transmission-connected with the first drive wheel, and the first drive motor is electrically connected to the first power terminal.

[0009] Preferably, an arc-shaped plate is provided at the open portion of the filter box below the filter plate, a plurality of water filtering holes are provided on the arc-shaped plate, and the upper portion of the arc-shaped plate is a downwardly curved surface; scrapers are provided on both sides of the filter plate symmetrically along the central axis, and any side of the scraper can be in slidable contact with the upper portion of the arc-shaped plate.

[0010] Preferably, the rotation range of the driving shaft of the first driving motor is not less than the curvature of the arc-shaped surface and not greater than 180°.

[0011] Preferably, the filter plate driving assembly also includes a second driving motor, which is arranged below the positioning block, and a second driving wheel is provided at one end of the driving shaft of the second driving motor, and the second driving wheel is transmission-connected with the auxiliary driving wheel; a second power terminal is provided on the downward moving path of the conductive block, and the second power terminal is electrically connected to the second driving motor, and the driving direction of the second driving motor is opposite to that of the first driving motor.

[0012] Preferably, the rotation range of the driving shaft of the second driving motor is not less than the curvature of the arc-shaped surface and not greater than 180°.

[0013] Preferably, a dirt storage box is arranged on the open outer side of the filter box, and a dirt storage opening is opened on a side of the dirt storage box adjacent to the arc-shaped plate.

[0014] Preferably, a water collecting box is arranged above the opening of the filter box or on the lower side of the photovoltaic panel, the water collecting box is funnel-shaped, a water collecting port is opened on the upper part of the water collecting box, and the water collecting port is opposite to the lower edge of the photovoltaic panel; a water outlet is opened at the bottom of the water collecting box, a plurality of water flow deceleration plates are arranged between the water outlet and the water collecting port, and water flow gaps are formed between the water flow deceleration plates.

[0015] By adopting the above technical solution, compared with the prior art, the present application has at least the following beneficial effects:

[0016] The water pump control mechanism can automatically determine whether the photovoltaic panel needs to be cleaned for a second time immediately according to the amount of impurities remaining on the filter plate after the first flushing of the photovoltaic panel, so as to improve the cleanliness of the photovoltaic panel after being cleaned. When the weight of the impurities remaining on the filter plate after the first flushing is sufficient to overcome the upward elastic force of the first drive spring on the filter plate, the conductive block connects to the first power connection column and energizes the water pump again to flush the photovoltaic panel again, so that the impurities on the photovoltaic panel are further reduced; when the weight of the impurities remaining on the filter plate after the first flushing is insufficient to overcome the upward elastic force of the first drive spring on the filter plate, the water pump only completes the first flushing and then disconnects the power supply to reduce power consumption; the filter plate and the filter box filter and collect the cleaning liquid used to flush the photovoltaic panel, so that the cleaning liquid can be reused to avoid waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the axonometric structure of a water pump control mechanism for automatic cleaning of photovoltaic panels in an embodiment.

[0018] Figure 2 It is a partial side view schematic diagram of a water pump control mechanism for automatic cleaning of photovoltaic panels in an embodiment.

[0019] Figure 3 It is a partial cross-sectional view of the water collecting box along line BB in the embodiment.

[0020] Figure 4 It is a partial cross-sectional view of the water pump control mechanism along line BB in the embodiment.

[0021] Figure 5 It is an enlarged view of the local structure of the filter box in the embodiment.

[0022] Figure 6 It is a partial schematic diagram of the front view of the water pump control mechanism in the embodiment.

[0023] Figure 7 It is a partial cross-sectional view of the AA portion of the water pump control mechanism in the embodiment.

[0024] Figure 8 It is an enlarged view of the local structure of the water pump control mechanism in the embodiment.

[0025] Fig. 9 It is a CC partial cross-sectional view of the positioning block in the embodiment.

[0026] In the figure: support 10, base 11, bracket 12, water collection box 13, water collection port 131, water outlet 132, water flow deceleration plate 133, cleaning component 20, sprinkler 21, water pump 22, water tank 23, water pump control mechanism 30, filter box 31, first drive spring 312, first ball 3121, second drive spring 311, second ball 3111, arc plate 313, water filter hole 3131, filter plate 32, scraper 3 21. dirt baffle 322. central axis 33. wedge block 331. conductive block 332. auxiliary drive wheel 333. positioning block 34. slide groove 341. rotating shaft 342. first power post 343. second power post 344. first drive motor 35. first drive wheel 351. second drive motor 36. second drive wheel 361. dirt storage box 37. dirt storage port 371. pull-out box 372. handle 373. photovoltaic panel 40. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The technical solution of the present application will be further described below in conjunction with the drawings of the embodiments of the present application, and the present application is not limited to the following specific implementation methods.

[0028] It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components. In the description of the present application, it should be understood that if there are terms such as "upper", "lower", "inner", "outer", "left", "right", "front", "rear", "top", "bottom" and the like indicating directions or positional relationships based on the orientations or positional relationships shown in the drawings, it is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the structure or component referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on the present patent, and for those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0029] The following is combined with Figure 1 To Attachment Fig. 9 And specific embodiments further describe the present application in detail.

[0030] In the present application, a water pump control mechanism 30 for automatic cleaning of photovoltaic panels is disclosed, which is used to control a device for regularly cleaning photovoltaic panels through a water pump. The device for cleaning photovoltaic panels mainly includes a support member 10 and a cleaning assembly 20, wherein the support member 10 includes a base 11 for horizontal placement on the bottom surface and a bracket 12 arranged on the top of the base 11, and the bracket 12 includes at least two angular joint plates (i.e., long strips of plates whose two sides are perpendicular to each other and connected in an angular shape) and a support rod and a connecting rod. The support rod is fixed to the top of the base 11 in a vertical direction, and the connecting rod is fixed at an angle at the top of the support rod, and the two ends of the connecting rod are respectively fixed in parallel with the above-mentioned angular joint plates, and the surface where the two angular joint plates are located is the front side of the bracket 12, and the space between the two angular joint plates is used to install the photovoltaic The photovoltaic panel 40 is provided with a certain inclination angle to cater to the light exposure; the cleaning component 20 includes a sprayer 21, a water pump 22, a water tank 23 and a power supply, wherein the sprayer 21 is arranged on the top of the bracket 12 (that is, fixed on the angular joint plate located at the top edge of the photovoltaic panel 40), and the sprayer 21 is provided with a plurality of nozzles downward, and the water flow range sprayed by the nozzles can at least cover the width of the upper edge of the photovoltaic panel 40, and the above-mentioned water tank 23 is arranged on one side of the base 11, and the water outlet of the water tank 23 is connected with the water inlet of the water pump 22 through a water pipe, and the water outlet of the water pump 22 is connected with the water inlet of the sprayer 21 through a water pipe, and the water pump 22 is electrically connected to the power supply. When the water pump 22 is energized, the cleaning liquid stored in the water tank 23 can be pumped out and the photovoltaic panel 40 can be washed from top to bottom through the sprayer 21.

[0031] The water pump control mechanism 30 disclosed in the present application includes a filter box 31 and a filter plate 32. The filter box 31 is arranged below the photovoltaic panel 40 and its bottom is connected to the inside of the water tank 23. The filter box 31 is opened upward on one side (in this embodiment, it refers to the upper side of the filter box 31) adjacent to the bottom of the photovoltaic panel 40 to form an opening for water inlet. The filter box 31 is used to collect the cleaning liquid flowing down the surface of the photovoltaic panel 40 through the opening and pass it into the water tank 23. The filter plate 32 can just cover the opening of the filter box 31 when in a horizontal state, so as to control the cleaning liquid flowing into the filter box 31. The cleaning liquid is filtered to remove impurities such as dust, bird droppings, and leaves in the cleaning liquid, so that the cleaning liquid can be recycled; a positioning block 34 is provided on the upper left side of the open filter box 31, and a slide groove 341 is provided on the upper part of the positioning block 34 downward along the gravity direction, and the above-mentioned slide groove 341 runs through the left and right sides of the positioning block 34, and a central shaft 33 is slidably and rotatably provided in the slide groove 341, and a rotating shaft 342 is rotatably provided on the inner side wall of the slide groove 341 perpendicular to the axial direction of the central shaft 33, and the rotating shaft 342 is rotatably or slidably connected with the central shaft 33, so that the central shaft 33 can The central shaft 33 and the rotating shaft 342 can swing around the axis of the rotating shaft 342 (that is, the central shaft 33 and the rotating shaft 342 form a lever); the central shaft 33 passes through the filter plate 32 from the left side to the right side of the filter box 31, so that the filter plate 32 can rotate with the central shaft 33; a slot is provided on the right side wall of the filter box 31, and the right end of the central shaft 33 can be slidably connected to the slot up and down; a first driving spring 312 is also fixed in the slot in a direction perpendicular to the axial direction of the central shaft 33 (that is, the vertical direction), and the first driving spring 312 always maintains an upward elastic force on the central shaft 33, so that the first driving spring 312 can The upper end of the first driving spring 312 is easy to keep sliding with the central shaft 33 when the central shaft 33 is in a rotating state, and the first ball 3121 is arranged on the upper end of the first driving spring 312, and the first ball 3121 always keeps rolling contact with the central shaft 33; the left end of the central shaft 33 extending out of the above-mentioned slide groove 341 is provided with a conductive block 332, and the conductive block 332 is electrically connected to the above-mentioned power supply, and on the path of the conductive block 332 moving upward, a first power connection post 343 is arranged on the upper part of one side of the positioning block 34 (located above the conductive block 332), and the first power connection post 343 is electrically connected to the water pump 22.

[0032] Specifically, a PLC controller can also be connected to the control loop formed by the water pump 22 and the power supply to set the time for the water pump 22 to automatically start periodically so that it can flush the photovoltaic panel 40 (the "periodically" here means that the interval time is much longer than the time for repeated cleaning of the photovoltaic panel 40 in a short period of time to be solved by the present application, such as controlling the water pump 22 to start and clean the photovoltaic panel 40 every 3 days by the PLC controller, and the periodic control of flushing the photovoltaic panel 40 by the PLC controller described here is one of the conventional technical means in the field, and is not a necessary technical means relied upon by the present application to solve the technical problem).

[0033] When the above mechanism is used, when the water pump 22 is automatically started regularly, the sprayer 21 rinses the photovoltaic panel 40 once, and the rinsing liquid flows downward along the surface of the photovoltaic panel 40, and after filtering out the sludge, leaves, bird droppings and other photovoltaic panel 40 pollutants flowing with the rinsing liquid through the filter plate 32, it is collected through the filter box 31 and introduced into the water tank 23 for recycling; when the amount of impurities remaining on the filter plate 32 is large (it is considered that there is still a high probability that a large amount of impurities are left on the surface of the photovoltaic panel 40), when the downward gravity of the filter plate 32 and the impurities is greater than the upward elastic force of the first drive spring 312 on the central shaft 33 (filter plate 32), the right end of the central shaft 33 sinks and compresses the first drive spring 312 downward. A driving spring 312, under the action of a lever, the left end of the central axis 33 rotates upward around the rotating shaft 342, and makes the conductive block 332 contact the first connecting post 343. At this time, the conductive block 332 and the first connecting post 343 connect the water pump 22 to the power supply again, so that the sprayer 21 sprays the cleaning liquid to rinse the surface of the photovoltaic panel 40 again, so as to increase the probability of the photovoltaic panel 40 being rinsed clean. When the impurities remaining on the filter plate 32 after the first rinse are less and not enough to make the filter plate 32 (central axis 33) sink (it is regarded as less impurities on the surface of the photovoltaic panel 40), the water pump 22 automatically completes one cleaning and then cuts off the power. At this time, there is no need to repeatedly clean the photovoltaic panel 40.

[0034] The water pump control mechanism 30 can achieve at least the following technical effects:

[0035] The water pump control mechanism 30 can automatically determine whether the photovoltaic panel 40 needs to be cleaned for the second time immediately according to the amount of impurities remaining on the filter plate 32 after the first flushing of the photovoltaic panel 40, so as to improve the cleanliness of the photovoltaic panel 40 after being cleaned. When the weight of the impurities remaining on the filter plate 32 after the first flushing is sufficient to overcome the upward elastic force of the first drive spring 312 on the filter plate 32, the conductive block 332 connects to the first power connection column 343 and energizes the water pump 22 again, and the photovoltaic panel 40 is flushed again, so that the impurities on the photovoltaic panel 40 are further reduced; when the weight of the impurities remaining on the filter plate 32 after the first flushing is insufficient to overcome the upward elastic force of the first drive spring 312 on the filter plate 32, the water pump 22 is disconnected from the power supply after completing the first flushing, thereby reducing power consumption.

[0036] In addition, the present application also provides some more specific implementations to improve the above-mentioned water pump control mechanism 30.

[0037] Furthermore, in order to make the conductive block 332 stable in position for a period of time after contacting the first power-connecting post 343, so that the circuit of the water pump 22 is more stable after being powered on, a wedge block 331 is provided at the right end of the central shaft 33 (one end of the central shaft 33 is connected to the bottom surface of the wedge block 331 with a larger area), and the wedge block 331 is rotatably and slidably connected to the right inner wall of the filter box 31 (that is, the volume of the slot located on the right side wall of the filter box 31 is larger than the volume of the wedge block 331, and the wedge block 331 can be in the slot A second driving spring 311 is fixed in the slot along the axial direction (i.e., horizontal direction) of the central axis 33, and the second driving spring 311 always maintains a leftward elastic force on the wedge block 331; in order to enable the second driving spring 311 to easily slide from the bottom surface of the wedge block 331 to the inclined side surface of the wedge block 331, a second ball 3111 is provided at one end of the second driving spring 311, and the second ball 3111 always maintains rolling contact with the smaller bottom surface of the wedge block 331.

[0038] When the water pump control mechanism 30 is used, when the filter plate 32 is pressed downward by impurities, the center shaft 33 sinks and drives the wedge block 331 to slide downward relative to the second drive spring 311. One end of the second drive spring 311 extends to the left and makes the second ball 3111 contact the upper part of the inclined side of the wedge block 331. At this time, the elastic force of the second drive spring 311 produces a downward component force on the wedge block 331, so that the conductive block 332 at the left end of the center shaft 33 can maintain stable contact with the first power terminal 343, so that the circuit of the water pump 22 is more stable after power is turned on.

[0039] Furthermore, when the water pump 22 is started for the second time to rinse the photovoltaic panel 40 again, in order to clean up the impurities on the filter plate 32, the conductive block 332 is restored to the state of being away from the first power connection post 343 (even if the above-mentioned water pump control mechanism 30 is restored to the state where it can judge whether the photovoltaic panel 40 needs to be repeatedly cleaned again according to the weight of the impurities on the filter plate 32), the above-mentioned water pump control mechanism 30 also includes a filter plate drive assembly, which includes a first drive motor 35, the first drive motor 35 is arranged on the upper left side of the above-mentioned positioning block 34, and a first drive wheel 351 is fixed to one end of the drive shaft of the first drive motor 35, and an auxiliary drive wheel 333 is fixed to the position of the central axis 33 adjacent to the first drive wheel 351, and when the auxiliary drive wheel 333 contacts the first drive wheel 351, the curved surface of the auxiliary drive wheel 333 can mesh with the curved surface of the first drive wheel 351 for transmission or friction transmission; the first drive motor 35 is electrically connected to the first power connection post 343.

[0040] When the water pump control mechanism 30 is used, after the water pump 22 is started for the second time to flush the photovoltaic panel 40 again, the PLC controller disconnects the passage between the water pump 22 and the power supply, and the conductive block 332 contacts the first power terminal 343 to energize the power supply and the first drive motor 35. Since the central shaft 33 is in an upward state at this time, the auxiliary drive wheel 333 contacts the first drive wheel 351, the first drive motor 35 starts and drives the first drive wheel 351 to rotate and drives the auxiliary drive wheel 333 to rotate. The auxiliary drive wheel 333 drives the central shaft 33 to rotate, so that the filter plate 32 flips downward, and the impurities on the filter plate 32 are thus thrown off the filter plate 32. When the filter plate 32 returns to a horizontal state, it is not affected by the weight of the impurities. The central shaft 33 returns to its initial position under the action of the first drive spring 312, and the conductive block 332 is away from the filter plate 32. Opening the first power post 343 cuts off the power to the first drive motor 35, and the auxiliary drive wheel 333 also moves downward away from the first drive wheel 351. At this time, the first drive spring 312 and the second drive spring 311 are restored to their initial state, and there are no impurities on the filter plate 32. When the water pump 22 is automatically turned on to rinse the photovoltaic panel 40 for the next time, the water pump control mechanism 30 can continue to judge whether the photovoltaic panel 40 needs to be repeatedly cleaned according to the weight of impurities on the filter plate 32. In this state, if the weight of impurities on the filter plate 32 after the second rinse can still make the conductive block 332 contact the first power post 343 again, the water pump 22 is powered on and the photovoltaic panel 40 is cleaned for the third time, or even more times, until the weight of impurities on the filter plate 32 is not enough to make the conductive block 332 contact the first power post 343.

[0041] Furthermore, in order to prevent the filter plate 32 from accidentally dropping impurities into the bottom of the filter box 31 during rotation, causing the filter box 31 to be blocked by impurities, an arc plate 313 is provided at the open part of the filter box 31 and below the filter plate 32. The arc plate 313 covers the inside of the filter box 31, and a plurality of water filter holes 3131 are vertically penetrated on the arc plate 313, and at least the upper surface of the arc plate 313 is an arc surface that bends downward; scrapers 321 are provided on both sides of the filter plate 32 symmetrically along the central axis 33, and one side of any scraper bar 321 is in sliding contact with the arc surface of the arc plate 313.

[0042] When the filter plate 32 is driven to rotate by the first driving motor 35, some impurities fall from the filter plate 32 into the filter box 31 and are intercepted by the arc plate 313 below the filter plate 32. The water filter holes 3131 on the arc plate 313 are used to intercept impurities and allow the cleaning liquid to pass through. Moreover, since the upper surface of the arc plate 313 is an arc-shaped surface, when the filter plate 32 rotates more than one circle or the filter plate 32 rotates from one side of the arc plate 313 to the other side and rotates in the opposite direction, the impurities on the upper surface of the arc plate 313 can be scraped out from the open opening of the filter box 31 by the scraper bar 321, thereby preventing a large amount of impurities from accumulating on the upper surface of the arc plate 313 and affecting the passage of the cleaning liquid.

[0043] Furthermore, when the rotation range of the filter plate 32 is too large (exceeding 180°), although impurities on the upper surface of the filter plate 32 can fall onto the curved plate 313, as the lower surface of the filter plate 32 flips to the upper side, the scraper bar 321 can easily carry away some impurities and attach them to the filter plate 32 when scraping impurities on the curved plate 313. To avoid the above situation, the rotation angle of the drive shaft of the first drive motor 35 is limited to a range of not less than the curvature of the curved surface and not more than 180°.

[0044] Based on the above embodiment, the filter plate 32 can clean itself during the rotation process and reduce the probability of being contaminated by impurities on the arc plate 313.

[0045] Furthermore, in order to enable the filter plate 32 to scrape off impurities on the arc plate 313 in the same direction during rotation, the filter plate drive assembly also includes a second drive motor 36, which is arranged at the lower left side of the positioning block 34 in the same fixing manner and angle as the first drive motor 35, and a second drive wheel 361 is arranged on the drive shaft of the second drive motor 36. When the auxiliary drive wheel 333 descends and contacts the second drive wheel 361 after the impurities on the filter plate 32 fall off, the curved surface of the auxiliary drive wheel 333 can mesh with the curved surface of the first drive wheel 351 for transmission or friction transmission; on the path where the conductive block 332 moves downward, a second power connection post 344 is arranged at the lower part of one side of the positioning block 34 (located below the conductive block 332), and the second power connection post 344 is electrically connected to the second drive motor 36, and the driving direction of the second drive motor 36 is opposite to that of the first drive motor 35.

[0046] When the water pump control mechanism 30 is used, since the filter plate 32 is driven by the first drive motor 35 to rotate counterclockwise, impurities on the upper surface of the filter plate 32 slide downward and fall on the upper surface of the arc plate 313 during the downward rotation of the filter plate 32. As one side of the filter plate 32 rotates from the front end to the rear end of the arc plate 313, the amount of impurities on the filter plate 32 gradually decreases, the central axis 33 is not enough to compress the first drive spring 312, the first drive spring 312 gradually resets, the central axis 33 also returns to the horizontal state and causes the auxiliary drive wheel 333 to move downward away from the first drive wheel 351. When the auxiliary drive wheel 333 returns to the initial position, it contacts the second drive wheel 361, and the conductive block 332 contacts the second power connection post 344, connecting the power supply to the circuit of the second drive motor 36. The second drive motor 36 starts and rotates clockwise, driving the auxiliary drive wheel 333 to drive the filter plate 32 to flip clockwise, so that the scraper 321 scrapes from the rear side of the arc plate 313 to the front side, and the impurities on the arc plate 313 are scraped out from one side of the filter box 31. In the above manner, the first drive motor 35 and the second drive motor 36 are driven separately, which can not only improve the efficiency of scraping impurities by the filter plate 32, but also effectively prevent the impurities on the arc plate 313 from contaminating the filter plate 32 again.

[0047] Furthermore, in order to enable the filter plate 32 to return to its initial horizontal state after rotation so as to continue filtering the cleaning liquid, the rotation angle of the drive shaft of the above-mentioned second drive motor 36 is limited to a range of not less than the curvature of the arc surface and not more than 180°, so that the filter plate 32 returns to its initial position after cleaning the arc plate 313.

[0048] Specifically, in order to avoid the second drive motor 36 being continuously energized when the filter plate 32 is in the initial position, the second drive motor 36 is also electrically connected to the above-mentioned PLC controller. The power-on duration of the second drive motor 36 is set by the PLC controller so that the second drive motor 36 immediately cuts off the power and stops rotating when driving the filter plate 32 to rotate to the initial position. The second drive motor 36 is not energized until the conductive block 332 leaves the second power-connecting post 344 and contacts the second power-connecting post 344 again.

[0049] Furthermore, in order to ensure that impurities on the filter plate 32 can fall from top to bottom to the upper surface of the arc plate 313 (to prevent impurities from splashing everywhere during the rotation of the filter plate 32), dirt baffles 322 are respectively arranged on both sides of the filter plate 32 symmetrically along the central axis 33, and the dirt baffles 322 are respectively located on the top and bottom surfaces of the filter plate 32.

[0050] Specifically, when the filter plate 32 starts to rotate counterclockwise from a horizontal state, the dirt baffle 322 located on the rear side of the upper surface of the filter plate 32 blocks impurities such as mud and sand on the filter plate 32, preventing the impurities from flowing in a direction opposite to the rotation direction of the filter plate 32, forcing the impurities to fall from top to bottom to the surface of the arc plate 313.

[0051] Furthermore, in order to prevent the dirt shielding plate 322 from contacting the arc plate 313 and interfering with the rotation of the filter plate 32 during the rotation, the angle formed by the dirt shielding plate 322 and the filter plate 32 is limited to 0° to 90°.

[0052] Specifically, within the range of the angle formed by the dirt-blocking plate 322 and the filter plate 32 , the specific degree of the angle should be determined according to the curvature of the arc-shaped plate 313 .

[0053] Furthermore, a dirt storage box 37 is disposed on the open outer side of the filter box 31 , and a dirt storage opening 371 is opened on one side of the dirt storage box 37 adjacent to the arc-shaped plate 313 .

[0054] Specifically, the dirt storage box 37 is arranged at the front side of the filter box 31, and the dirt storage opening 371 is adjacent to the open front side and connected to the front side of the arc plate 313; a pull-out box 372 is detachably arranged in the dirt storage box 37, and a handle 373 is arranged on one side of the pull-out box 372, and the pull-out box 372 can be lifted out of the dirt storage opening 371 by the handle 373. When the filter plate 32 rotates clockwise and the impurities on the arc plate 313 are scraped off from the open front side by the scraping strip 321, the impurities can enter the dirt storage box 37 through the dirt storage opening 371 and be collected by the pull-out box 372. When the pull-out box 372 is about to be filled, the pull-out box 372 is taken out to remove the impurities therein.

[0055] Furthermore, in order to prevent the water flow from impacting the filter plate 32 when flowing down from the surface of the photovoltaic panel 40, causing the conductive block 332 to accidentally touch the first power terminal 343, the above-mentioned bracket 12 is located above the opening of the filter box 31 or on the lower side of the photovoltaic panel 40. A water collecting box 13 is arranged. The internal structure of the water collecting box 13 is funnel-shaped, and a water collecting port 131 is opened on the top of the water collecting box 13, and the water collecting port 131 is directly opposite to the lower edge of the photovoltaic panel 40; a water outlet 132 is opened at the bottom of the water collecting box 13, and the water outlet 132 is directly opposite to the filter plate 32; a plurality of water flow deceleration plates 133 are arranged between the water outlet 132 and the water collecting port 131, and a water flow gap is formed between the water flow deceleration plates 133, and any of the water flow deceleration plates 133 is inclined relative to the inner side of the water collecting box 13 to form a slope to slow down the water flow rate.

[0056] When the water pump control mechanism 30 is used, the cleaning liquid flows down from the lower edge of the photovoltaic panel 40 and flows into the water collecting box 13 through the water collecting port 131. The cleaning liquid is decelerated by the water flow deceleration plate 133 and then slowly flows toward the filter plate 32, so as to prevent the filter plate 32 from swinging downward due to the impact of the water flow and causing the conductive block 332 to trigger the first power terminal 343.

[0057] In combination with the multiple structures and features in the above-mentioned embodiments, the above-mentioned water pump control mechanism 30 can ultimately control the rotation direction of the filter plate 32 to enable the filter plate 32 to have a self-cleaning function, and enable the water pump control mechanism 30 to repeatedly control the water pump 22 to clean the surface of the photovoltaic panel 40 until the impurities on the photovoltaic panel 40 are significantly reduced and the amount of impurities is not enough to cause the conductive block 332 to contact the first power terminal 343 to trigger the water pump 22 to power on.

[0058] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation methods of the present application. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A water pump control mechanism for automatic cleaning of photovoltaic panels, characterized in that: The invention comprises a filter box and a filter plate, wherein the filter box is arranged below the photovoltaic panel and is used to collect the cleaning liquid of the photovoltaic panel, the filter box is arranged to be opened upwards on one side adjacent to the photovoltaic panel, and the filter plate covers the opening of the filter box; a positioning block is arranged on one side outside the opening of the filter box, the positioning block is provided with a slide groove along the gravity direction, a central axis is penetrated on two opposite sides of the filter plate, a rotating shaft is arranged in the slide groove perpendicular to the axial direction of the central axis, the central axis passes through the slide groove and is rotatably or slidably connected with the rotating shaft, and the central axis can swing around the rotating shaft; a conductive block is arranged at one end of the central axis adjacent to the slide groove, a first power connection post is arranged on the upward moving path of the conductive block, and the first power connection post is electrically connected to a water pump for cleaning the photovoltaic panel; an end of the central axis away from the conductive block is slidably connected to the inner side wall of the filter box, and a first driving spring is arranged on one side of the filter box away from the positioning block in the vertical direction, a first ball is arranged at the top of the first driving spring, the first ball contacts the central axis, and the first driving spring is used to support the central axis upward.

2. The water pump control mechanism for automatic cleaning of photovoltaic panels according to claim 1 is characterized in that: A wedge block is arranged at one end of the central axis away from the conductive block, and the wedge block is slidably connected to the filter box up and down; and a second driving spring is arranged in the horizontal direction on the side of the filter box away from the positioning block, and a second ball is arranged at one end of the second driving spring, and the second ball is in contact with the wedge block.

3. The water pump control mechanism for automatic cleaning of photovoltaic panels according to claim 2 is characterized in that: It also includes a filter plate drive assembly, which includes a first drive motor, which is arranged above the positioning block, and a first drive wheel is arranged at one end of a drive shaft of the first drive motor, an auxiliary drive wheel is sleeved on the central axis adjacent to the first drive wheel, the auxiliary drive wheel is transmission-connected with the first drive wheel, and the first drive motor is electrically connected to the first power terminal.

4. The water pump control mechanism for automatic cleaning of photovoltaic panels according to claim 3 is characterized in that: An arc-shaped plate is arranged at the open part of the filter box below the filter plate, a plurality of water filtering holes are arranged on the arc-shaped plate, and the upper part of the arc-shaped plate is an arc-shaped surface bent downward; scrapers are arranged on both sides of the filter plate symmetrically along the central axis, and one side of any scraper can be in slidable contact with the upper part of the arc-shaped plate.

5. The water pump control mechanism for automatic cleaning of photovoltaic panels according to claim 4 is characterized in that: The rotation range of the driving shaft of the first driving motor is not less than the curvature of the arc-shaped surface and not greater than 180°.

6. The water pump control mechanism for automatic cleaning of photovoltaic panels according to claim 5, characterized in that: The filter plate driving assembly also includes a second driving motor, which is arranged below the positioning block, and a second driving wheel is arranged at one end of a driving shaft of the second driving motor, and the second driving wheel is transmission-connected with the auxiliary driving wheel; a second power connection post is arranged on the downward moving path of the conductive block, and the second power connection post is electrically connected to the second driving motor, and a driving direction of the second driving motor is opposite to that of the first driving motor.

7. The water pump control mechanism for automatic cleaning of photovoltaic panels according to claim 6, characterized in that: The rotation range of the driving shaft of the second driving motor is not less than the curvature of the arc-shaped surface and not greater than 180°.

8. The water pump control mechanism for automatic cleaning of photovoltaic panels according to any one of claims 4 to 7, characterized in that: A dirt receiving box is arranged outside the open opening of the filter box, and a dirt receiving opening is opened on one side of the dirt receiving box adjacent to the arc-shaped plate.

9. The water pump control mechanism for automatic cleaning of photovoltaic panels according to claim 1, characterized in that: A water collecting box is arranged above the open mouth of the filter box or on the lower side of the photovoltaic panel. The structure of the water collecting box is funnel-shaped. A water collecting port is opened on the upper part of the water collecting box, and the water collecting port is directly opposite to the lower edge of the photovoltaic panel. A water outlet is opened at the bottom of the water collecting box, and a plurality of water flow deceleration plates are arranged between the water outlet and the water collecting port to form water flow gaps.

Images