A spraying device suitable for photovoltaic water washing

Abstract

The utility model discloses a kind of suitable for photovoltaic washing's spraying device, including fixing piece, water supply component, baffle and damping layer etc., in actual use detachably connect on the frame of photovoltaic panel with fixing piece, simple and easy to set up with baffle on fixing piece, spray head is connected with water supply source by pipeline etc. Conventional means, overall structure is simple and convenient to install, its cost is more inexpensive compared with prior art, when photovoltaic panel needs to be cleaned, water is supplied to spray head to spray water upward, water impact on baffle falls downward to realize the spraying cleaning effect of photovoltaic panel, under this precondition, baffle 4 can control the falling spraying range generated by shielding and scattering water to a certain extent, so that spraying cleaning effect of perfect and more efficient than artificial means is realized by low-cost means.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic panel cleaning equipment technology, specifically to a spray device suitable for photovoltaic water washing. Background Technology

[0002] Photovoltaic power generation, as a common form of new energy, has been widely adopted. Current photovoltaic power plant operation and maintenance technologies, based on the principles of photovoltaic power generation, require frequent cleaning of the photovoltaic modules.

[0003] In existing technologies, for large-scale photovoltaic power plants, robots or robotic arms are often used to clean the photovoltaic fields that cover a large area. However, for smaller-scale photovoltaic power plants, the cost of robots and robotic arms is too high, and there is a lot of redundancy and waste in terms of performance. Therefore, manual cleaning is often used, but the efficiency of manual cleaning is low. Utility Model Content

[0004] To address the technical problems identified in the background section of the prior art, this utility model provides a spray device suitable for photovoltaic water washing. The technical problem to be solved by this utility model is achieved through the following technical solution:

[0005] A spray device suitable for photovoltaic water washing is used to clean photovoltaic panels, the photovoltaic panels including a frame. The spray device suitable for photovoltaic water washing includes:

[0006] Fasteners are detachably attached to the frame;

[0007] A water supply assembly includes a nozzle connected to a fixture, wherein the direction of the water jet from the nozzle is upward.

[0008] The baffle is movably connected to the fixed part. One side of the baffle has a shielding surface, which is located in the direction of the water jet from the nozzle. It is used to block and disperse the water jet and make the water jet fall onto the photovoltaic panel. The baffle can change the orientation of the shielding surface, thereby changing the direction and range of the water jet.

[0009] The damping layer is installed at the movable connection between the baffle and the fixing component. The damping layer is used to increase the friction between the baffle and the fixing component, thereby keeping the baffle and the fixing component relatively stationary under the spray of the nozzle.

[0010] Furthermore, the fastener includes an adjustment mechanism and horizontal upper and lower clamping plates. The adjustment mechanism is located between the upper and lower clamping plates and is used to adjust and fix the distance between the upper and lower clamping plates. The upper and lower clamping plates are used to press against both sides of the frame to achieve a detachable connection between the fastener and the frame in a clamping manner. The nozzle is connected to the upper clamping plate, the baffle is movably connected to the upper clamping plate, and the damping layer is connected between the baffle and the upper clamping plate.

[0011] Furthermore, the adjustment mechanism includes two vertical serrated clips. The upper ends of the serrated clips are connected to the lower bottom surface of the upper clamping plate. The two serrated clips have a first serration on the opposite side. The serrated clips and the first serration are elastic. The lower clamping plate has two through slots, one through slot corresponding to one serrated clip. The serrated clip can pass into its corresponding through slot. The inner side of the through slot facing the first serration has a corresponding second serration. The first serration and the second serration can mesh.

[0012] Furthermore, a dovetail slider is provided at the upper end of the serrated clip, and two parallel dovetail grooves are provided on the lower bottom surface of the upper clamping plate. One dovetail groove corresponds to one dovetail slider of the serrated clip. The dovetail groove has an inlet on the side of the upper clamping plate, and the dovetail slider can enter the dovetail groove through the inlet and slide in connection with the dovetail groove.

[0013] Furthermore, the fastener also includes a connecting beam and a connecting arm. The connecting beam is parallel to the upper clamping plate and located above the upper clamping plate. The connecting arm is connected between the connecting beam and the upper clamping plate. The baffle is movably connected to the lower bottom surface of the connecting beam. The damping layer is located between the baffle and the connecting beam. The nozzle is located below the connecting beam.

[0014] Furthermore, a vertical rotating shaft is connected to the upper part of the baffle, and a shaft hole corresponding to the rotating shaft is opened on the connecting beam. The rotating shaft is rotatably connected in the shaft hole. A damping layer is set on the inner side wall of the shaft hole and / or the outer side wall of the rotating shaft. The damping layer is elastic and relies on frictional resistance to keep the baffle and the connecting beam relatively stationary under the water jet of the nozzle.

[0015] Furthermore, the water supply assembly also includes: a water supply pipe, a water intake connector pipe and a hose, the water supply pipe having an outlet, one end of the water intake connector pipe being detachably connected to the outlet, and the hose being connected between the other end of the water intake connector pipe and the nozzle.

[0016] Furthermore, the water intake connector pipe includes a connector pipe body and a sealing ring. The sealing ring is fixedly sleeved on one end of the connector pipe body. The sealing ring is elastic and can be squeezed into or squeezed out of the water outlet by elastic deformation, thereby realizing the detachable connection between the water intake connector pipe and the water outlet.

[0017] Furthermore, the side of the sealing ring facing the outlet is configured as an inclined surface, which makes it easier to squeeze the sealing ring into the outlet.

[0018] Furthermore, the water supply components also include:

[0019] The water supply tank is connected to an external water source, and the water supply tank is also connected to the spray head;

[0020] A pressure-stabilizing pump is connected between the water supply tank and the nozzle;

[0021] The liquid level sensor is installed in the water supply tank to detect the water level in the tank. The liquid level sensor can generate an alarm signal only when the water level is lower than the liquid level sensor.

[0022] The control component is connected to the pressure stabilizing pump and is powered by the photovoltaic panel. The control component is also connected to the liquid level sensor. When the liquid level sensor generates an alarm signal, it transmits the alarm signal to the control component. When the control component receives the alarm signal, it shuts down the pressure stabilizing pump. When the liquid level sensor does not generate an alarm signal, the control component controls the pressure stabilizing valve to operate normally.

[0023] The beneficial effects of this utility model are as follows: In actual use, the fixing component is detachably connected to the frame of the photovoltaic panel. The fixing component is simply equipped with a nozzle and a baffle. The nozzle is connected to the water supply source through conventional means such as pipelines. The overall structure is simple and easy to install. It can be directly assembled from hand-made parts or standard parts. Even if it is installed on every photovoltaic panel in a small-scale photovoltaic field, its cost is relatively lower than that of the existing technology. When it is necessary to clean the photovoltaic panel, water is supplied to the nozzle so that it sprays water upward. The water flow impacts the baffle and falls downward, thereby achieving the spray cleaning effect on the photovoltaic panel. Under this premise, the baffle can control the spray range caused by blocking and scattering the water flow to a certain extent, thereby achieving a complete spray cleaning effect that is more efficient than manual means at a low cost. Attached Figure Description

[0024] Figure 1 This is an overall side sectional view of one embodiment of the present invention;

[0025] Figure 2 This is an overall front view of one embodiment of the present utility model;

[0026] Figure 3 This is a three-dimensional schematic diagram of the main parts of one embodiment of the present utility model;

[0027] Figure 4 This is a three-dimensional schematic diagram of the lower clamping plate according to one embodiment of the present utility model;

[0028] Figure 5 This is a three-dimensional schematic diagram of a baffle according to one embodiment of the present utility model;

[0029] Figure 6 This is a partial three-dimensional structural schematic diagram of one embodiment of the present utility model;

[0030] Figure 7 This is a three-dimensional schematic diagram of a water intake connector pipe according to an embodiment of the present utility model;

[0031] Figure 8This is a schematic diagram of the connection of a water supply component according to one embodiment of the present invention.

[0032] Figure label:

[0033] 1. Photovoltaic panel; 2. Fixing component; 21. Upper clamping plate; 211. Dovetail slide; 22. Lower clamping plate; 23. Serrated clamping strip; 231. Dovetail slider; 24. Through groove; 25. Connecting beam; 26. Connecting arm; 3. Water supply assembly; 31. Sprinkler head; 32. Water supply pipe; 33. Water intake connector pipe; 331. Connector pipe body; 332. Sealing ring; 34. Hoses; 35. Water supply tank; 36. Pressure stabilizing pump; 37. Liquid level sensor; 38. Control assembly; 4. Baffle; 41. Rotating shaft. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0035] This utility model provides a spray device suitable for photovoltaic water washing, used to clean photovoltaic panels 1. The photovoltaic panel 1 includes a frame. The spray device suitable for photovoltaic water washing includes: a fixing member 2, a water supply component 3, a baffle 4, and a damping layer, etc. The fixing member 2 is detachably connected to the frame. The water supply component 3 includes a nozzle 31, which is connected to the fixing member 2. The direction of the water jet from the nozzle 31 is upward. The baffle 4 is movably connected to the fixing member 2. One side of the baffle 4 has a shielding surface, which is located in the direction of the water jet from the nozzle 31. It is used to block and disperse the water jet and make the water flow fall onto the photovoltaic panel 1. The baffle 4 can change the orientation of the shielding surface, thereby changing the direction and range of the water flow. The damping layer is disposed at the movable connection between the baffle 4 and the fixing member 2. The damping layer is used to increase the friction between the baffle 4 and the fixing member 2, thereby keeping the baffle 4 and the fixing member 2 relatively stationary under the spray of the nozzle 31.

[0036] For details, please refer to Figures 1 to 8 In actual use, the fixing part 2 is detachably connected to the frame of the photovoltaic panel 1. The fixing part 2 is simply equipped with a nozzle 31 and a baffle 4. The nozzle 31 is connected to the water supply source through conventional means such as pipelines. The overall structure is simple and easy to install. It can be directly assembled from handmade parts or standard parts. Even if it is installed on every photovoltaic panel in a small-scale photovoltaic field, its cost is relatively lower than that of existing technologies. When it is necessary to clean the photovoltaic panel 1, water is supplied to the nozzle 31 so that it sprays water upward. The water flow impacts the baffle 41 and then falls downward, thereby achieving the spray cleaning effect on the photovoltaic panel 1.

[0037] To achieve a low-cost and practical technical effect, the nozzles do not use existing technologies with guiding or self-adjusting spray direction. Instead, a simple baffle 4 is used to block and disperse the water flow. Under this premise, this simple setting lacks adjustability, resulting in low adaptability. Therefore, in this embodiment, the baffle 4 is movably connected to the fixing member 2. The baffle 4 can adjust its orientation angle according to different photovoltaic panel sizes and setting angles, thereby controlling the scattered spray range after blocking and dispersing the water flow to a certain extent. This achieves a complete spray cleaning effect that is more efficient than manual methods at a low cost.

[0038] In various embodiments, the baffle 4 has various shapes, and its blocking surface can be a flat surface, an arc surface, or a bent surface, to block the water flow according to different needs. In this embodiment, reference is made to... Figure 1 The baffle 4 is a bent surface, having a first surface perpendicular to the initial velocity direction of the water jet from the nozzle 3, and a second surface approximately parallel to the initial velocity direction of the water jet from the nozzle 3, with an oblique transition between the first and second surfaces.

[0039] In various embodiments, the movable connection between the baffle 4 and the fixing member 2 can adopt various common movable connection forms, and the damping layer ensures that the baffle 4 will not move relative to the fixing member 2 under the impact of water flow through appropriate friction damping. For example, the baffle 4 is provided with a slider, and the fixing member 2 is provided with a matching groove. The baffle 4 can slide on a plane perpendicular to the initial velocity direction (or other directions) of the water jet from the nozzle 3 to adjust its position, and the damping layer is provided on the contact surface between the slider and the groove. Alternatively, the baffle 4 can be movably connected to the fixing member 2 by a hinge to adjust the angle between the shielding surface and the initial velocity of the water jet from the nozzle 3. The damping layer is provided at the hinge, or the hinge shaft can be directly configured as an elastic membrane damping material, such as rubber, and the interference fit part on its outer surface can be regarded as the damping layer.

[0040] To address the technical problems in the background technology and achieve basic technical effects at low cost, each component can be made of low-cost materials as needed. For example, the fastener 2, baffle 4, or other components can be made of polyethylene material, which still provides corrosion resistance, high temperature resistance, and aging resistance under low cost conditions, making it suitable for the working environment of photovoltaic panels.

[0041] Furthermore, an embodiment of the fastener 2 is provided. To achieve a low-cost technical effect, a relatively simple structure is selected for detachable connection with the frame of the photovoltaic panel 1, and it needs to be adaptable to frames of different thicknesses. Therefore, the fastener 2 includes an adjustment mechanism and horizontal upper clamping plate 21 and lower clamping plate 22. The adjustment mechanism is disposed between the upper clamping plate 21 and lower clamping plate 22 to adjust and fix the distance between the upper clamping plate 21 and lower clamping plate 22. The upper clamping plate 21 and lower clamping plate 22 are used to press against both sides of the frame to achieve a detachable connection between the fastener 2 and the frame by clamping. The nozzle 31 is connected to the upper clamping plate 21, the baffle 4 is movably connected to the upper clamping plate 21, and the damping layer is connected between the baffle 4 and the upper clamping plate 21.

[0042] Furthermore, in this embodiment, the adjustment mechanism includes two vertical serrated clips 23. The upper ends of the serrated clips 23 are connected to the lower bottom surface of the upper clamping plate 21. The two serrated clips 23 are provided with first serrations on their opposite sides. The serrated clips 23 and the first serrations are elastic. The lower clamping plate 22 has two through slots 24. One through slot 24 corresponds to one serrated clip 23. The serrated clip 23 can pass into its corresponding through slot 24. The inner side of the through slot 24 facing the first serration is provided with a corresponding second serration. The first serration and the second serration can mesh.

[0043] In this embodiment, the serrated clamping strip 23, the lower clamping plate 22, and the first and second serrations are all made of polyethylene. When a large external force is applied to the lower clamping plate 22, the first serration, being elastic, can deform in the through groove 24, causing the previously engaged first and second serrations to disengage and slide. This allows the second serration in the through groove 24 to engage with a new first serration, thereby changing the position of the through groove 24 relative to the serrated clamping strip 23. This changes the position of the lower clamping plate 22 on the serrated clamping strip 23, and consequently, the distance between the upper clamping plate 21 and the lower clamping plate 22. This achieves the clamping / disengagement process of the frame and can be adjusted according to different frame thicknesses. This adjustment method is low-cost and reliable.

[0044] Furthermore, in this embodiment, since the positional change between the serrated clip 23 and the lower clamping plate 22 requires elastic deformation of the first serration, it is necessary to consider the problem of adjustment failure caused by serration wear with increased use. Given that the serrated clip is a low-cost component, it is considered to design the serrated clip as an easily removable and replaceable component. Therefore, please refer to... Figure 2 and Figure 3The upper end of the serrated clip 23 is provided with a dovetail slider 231, and the lower surface of the upper clamping plate 21 is provided with two parallel dovetail grooves 211. One dovetail groove 211 corresponds to one dovetail slider 231 of the serrated clip 23. The dovetail groove 211 has an inlet on the side of the upper clamping plate 21, through which the dovetail slider 231 can enter and slide in connection with the dovetail groove 211. This detachable connection method prevents the serrated clip 23 from detaching from the upper clamping plate 21 when subjected to a vertical external force, but a horizontal force can be easily applied to generate horizontal movement between the two, which can detach the dovetail slider 231 from the dovetail groove 211, thus facilitating the replacement of the serrated clip 23.

[0045] Furthermore, in one embodiment, in order to position the baffle 4 in the direction of the water jet of the nozzle, the fixing member 2 further includes a connecting beam 25 and a connecting arm 26. The connecting beam 25 is parallel to the upper clamping plate 21 and is located above the upper clamping plate 21. The connecting arm 26 is connected between the connecting beam 25 and the upper clamping plate 21. The baffle 4 is movably connected to the lower bottom surface of the connecting beam 25. A damping layer is disposed between the baffle 4 and the connecting beam 25. The nozzle 31 is located below the connecting beam 25.

[0046] Furthermore, an embodiment is provided in which a baffle 4 is movably connected to a fixing member 2. A vertical rotating shaft 41 is connected to the upper part of the baffle 4. A shaft hole corresponding to the rotating shaft 41 is opened on the connecting beam 25. The rotating shaft 41 is rotatably connected within the shaft hole. A damping layer is disposed on the inner wall of the shaft hole and / or the outer wall of the rotating shaft 41. The damping layer is elastic and relies on frictional resistance to maintain the relative stationarity between the baffle 4 and the connecting beam 25 under the water jet from the nozzle 31. In some embodiments, the rotating shaft 41 is made of an elastic material, and its outer surface is disposed within the shaft hole with an interference fit. In this embodiment, the outer surface layer of the rotating shaft 41 made of elastic material can be considered as a damping layer.

[0047] Furthermore, an embodiment of a water supply component is provided. The water supply component 3 further includes: a water supply pipe 32, a water intake connector pipe 33 and a hose 34. The water supply pipe 32 is provided with a water outlet. One end of the water intake connector pipe 33 is detachably connected to the water outlet. The hose 34 is connected between the other end of the water intake connector pipe 33 and the nozzle 31.

[0048] Furthermore, to achieve a low-cost and quick technical effect, the water intake connector pipe 33 includes a connector pipe body 331 and a sealing ring 332. The sealing ring 332 is fixedly sleeved on one end of the connector pipe body 331. The sealing ring 332 is elastic and can be squeezed into or squeezed out of the water outlet by elastic deformation, thereby realizing a quick and detachable connection between the water intake connector pipe 33 and the water outlet. The sealing ring 332 can be made of silicone, rubber, or various soft plastic materials to have elasticity, so that it can deform and be squeezed into or squeezed out of the water outlet.

[0049] Furthermore, the side of the sealing ring 332 facing the outlet is configured as an inclined surface, which makes it easier to squeeze the sealing ring 332 into the outlet, thereby making the operation even more convenient.

[0050] Furthermore, the water supply component 3 also includes: a water supply tank 35, a pressure stabilizing pump 36, a level sensor 37, and a control component 38. The water supply tank 35 is connected to an external water source and is also connected to the sprinkler head 31. The pressure stabilizing pump 36 is connected between the water supply tank 35 and the sprinkler head 31. The level sensor 37 is installed in the water supply tank 35 to detect the water level in the water supply tank 35. The level sensor 37 can generate an alarm signal only when the water level is lower than the level sensor 37. The control component 38 is connected to the pressure stabilizing pump 36. The control component 38 is powered by a photovoltaic panel and is signal-connected to the level sensor 37. When the level sensor 37 generates an alarm signal, it transmits the alarm signal to the control component 38. When the control component 38 receives the alarm signal, it shuts off the pressure stabilizing pump 36. When the level sensor 37 does not generate an alarm signal, the control component 38 controls the pressure stabilizing valve to operate normally. Through the design of this embodiment, the water supply component 3 is provided with an automated technical effect in a simple and low-cost manner, making it more suitable for the characteristics of long-term continuous operation in photovoltaic fields.

[0051] In one embodiment, the control component draws power from the photovoltaic panel 1. The control component also includes a relay device, which can preset the start and stop times of the pressure stabilizing pump 36 to achieve the technical effect of spraying water onto the photovoltaic panel at predetermined intervals.

[0052] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A spray device suitable for photovoltaic water washing, used for cleaning photovoltaic panels (1), said photovoltaic panels (1) including a frame, characterized in that, include: The fastener (2) is detachably connected to the frame; The water supply assembly (3) includes a nozzle (31) connected to the fixing member (2), and the direction of the water jet from the nozzle (31) is upward. The baffle (4) is movably connected to the fixing member (2). One side of the baffle (4) has a shielding surface. The shielding surface is located in the direction of the water jet from the nozzle (31) and is used to block and disperse the water jet and cause the water to fall onto the photovoltaic panel (1). The baffle (4) can change the orientation of the shielding surface, thereby changing the direction and range of the water jet. A damping layer is provided at the movable connection between the baffle (4) and the fixing member (2). The damping layer is used to increase the friction between the baffle (4) and the fixing member (2), so as to keep the baffle (4) and the fixing member (2) relatively stationary under the spray of the nozzle (31).

2. The spray device suitable for photovoltaic water washing according to claim 1, characterized in that, The fixing member (2) includes an adjustment mechanism and a horizontal upper clamping plate (21) and a lower clamping plate (22). The adjustment mechanism is located between the upper clamping plate (21) and the lower clamping plate (22) and is used to adjust and fix the distance between the upper clamping plate (21) and the lower clamping plate (22). The upper clamping plate (21) and the lower clamping plate (22) are used to press against the two sides of the frame to achieve a detachable connection between the fixing member (2) and the frame in a clamping manner. The nozzle (31) is connected to the upper clamping plate (21). The baffle (4) is movably connected to the upper clamping plate (21). The damping layer is connected between the baffle (4) and the upper clamping plate (21).

3. The spray device suitable for photovoltaic water washing according to claim 2, characterized in that, The adjustment mechanism includes two vertical sawtooth strips (23). The upper end of the sawtooth strips (23) is connected to the lower bottom surface of the upper clamping plate (21). The two sawtooth strips (23) are provided with a first sawtooth on the opposite side. The sawtooth strips (23) and the first sawtooth are elastic. The lower clamping plate (22) has two through slots (24). One through slot (24) corresponds to one sawtooth strip (23). The sawtooth strip (23) can be inserted into its corresponding through slot (24). The inner side of the through slot (24) facing the first sawtooth is provided with a corresponding second sawtooth. The first sawtooth and the second sawtooth can mesh.

4. The spray device suitable for photovoltaic water washing according to claim 3, characterized in that, The upper end of the serrated clip (23) is provided with a dovetail slider (231), and the lower bottom surface of the upper clamping plate (21) is provided with two parallel dovetail grooves (211). One dovetail groove (211) corresponds to one dovetail slider (231) of the serrated clip (23). The dovetail groove (211) has an entrance on the side of the upper clamping plate (21). The dovetail slider (231) can enter the dovetail groove (211) through the entrance and slide with the dovetail groove (211).

5. The spray device suitable for photovoltaic water washing according to claim 2, characterized in that, The fixing member (2) also includes a connecting beam (25) and a connecting arm (26). The connecting beam (25) is parallel to the upper clamping plate (21) and located above the upper clamping plate (21). The connecting arm (26) is connected between the connecting beam (25) and the upper clamping plate (21). The baffle (4) is movably connected to the bottom surface of the connecting beam (25). The damping layer is provided between the baffle (4) and the connecting beam (25). The nozzle (31) is located below the connecting beam (25).

6. The spray device suitable for photovoltaic washing according to claim 5, characterized in that, The upper part of the baffle (4) is connected to a vertical rotating shaft (41). The connecting beam (25) has a shaft hole corresponding to the rotating shaft (41). The rotating shaft (41) is rotatably connected to the shaft hole. The damping layer is disposed on the inner side wall of the shaft hole and / or the outer side wall of the rotating shaft (41). The damping layer is elastic. The damping layer relies on frictional resistance to keep the baffle (4) and the connecting beam (25) relatively stationary under the water jet of the nozzle (31).

7. The spray device suitable for photovoltaic water washing according to claim 1, characterized in that, The water supply assembly (3) further includes: a water supply pipe (32), a water intake connector pipe (33) and a hose (34). The water supply pipe (32) has an outlet. One end of the water intake connector pipe (33) is detachably connected to the outlet. The hose (34) is connected between the other end of the water intake connector pipe (33) and the nozzle (31).

8. The spray device suitable for photovoltaic water washing according to claim 7, characterized in that, The water intake connector pipe (33) includes a connector pipe body (331) and a sealing ring (332). The sealing ring (332) is fixedly sleeved on one end of the connector pipe body (331). The sealing ring (332) is elastic and can be squeezed into or squeezed out of the water outlet by elastic deformation, thereby realizing the detachable connection between the water intake connector pipe (33) and the water outlet.

9. The spray device suitable for photovoltaic water washing according to claim 8, characterized in that, The sealing ring (332) is configured with an inclined surface on the side facing the outlet, so as to make it easier to squeeze the sealing ring (332) into the outlet.

10. The spray device suitable for photovoltaic water washing according to claim 1, characterized in that, The water supply component (3) also includes: The water supply tank (35) is connected to an external water source, and the water supply tank (35) is connected to the nozzle (31); A pressure-stabilizing pump (36) is connected between the water supply tank (35) and the nozzle (31); A liquid level sensor (37) is installed in the water supply tank (35) to detect the water level in the water supply tank (35). The liquid level sensor (37) can generate an alarm signal only when the water level is lower than the liquid level sensor (37). The control component (38) is connected to the pressure stabilizing pump (36). The control component (38) is powered by a photovoltaic panel and is connected to the liquid level sensor (37). When the liquid level sensor (37) generates an alarm signal, it transmits the alarm signal to the control component (38). When the control component (38) receives the alarm signal, it shuts down the pressure stabilizing pump (36). When the liquid level sensor (37) does not generate an alarm signal, the control component (38) controls the pressure stabilizing valve to operate normally.

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