Self-cleaning solar street lamp for construction site

Abstract

This utility model relates to a self-cleaning solar street light for construction sites, including a light pole, a light body, a photovoltaic panel, and a bracket; it also includes: a slider, slidably connected to the photovoltaic panel, with a brush at the bottom; an air duct, installed on the slider; a nozzle, with an air outlet on the air duct corresponding to the nozzle and connected to the air inlet of the nozzle; a slider drive mechanism; an air pump, installed on the light pole, with its air outlet connected to the air duct; and a control unit, including a controller and a rain sensor. The advantages are: by setting a rain sensor, rainwater is used to clean the photovoltaic panel on rainy days. Simultaneously, a nozzle and a push-pull battery iron are added. A strategy is input into the controller to periodically start the air pump and push-pull battery iron on non-rainy days. After the push-pull battery iron starts, the brush detaches from the photovoltaic panel, and the nozzle sprays air onto the surface of the photovoltaic panel. During the movement of the slider, the nozzle blows away dust particles adhering to the surface of the photovoltaic panel, achieving dry cleaning of the photovoltaic panel.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and in particular to a self-cleaning solar street light for construction sites. Background Technology

[0002] With the continuous advancement of solar energy conversion technology and the significant reduction in the cost of photovoltaic panels, the practice of installing solar streetlights along roadsides at construction sites is becoming increasingly common. However, unlike highway streetlights, the light poles are not high, allowing dust to quickly accumulate on the photovoltaic panels, affecting the efficiency of photoelectric conversion. To maintain the normal operation of the streetlights, the project team has to frequently arrange for staff to clean the solar panels, consuming manpower and resources.

[0003] Some patents disclose self-cleaning solar streetlights with cleaning devices, but these are mainly used for highway streetlights. Highway streetlight poles are tall, and dust accumulation takes a long time to reach a point requiring cleaning, thus infrequent cleaning is unnecessary. The cleaning devices for these streetlights typically include a small water tank to store rainwater, using a timed-starting scraper and nozzles to spray water for periodic cleaning. The cleaning cycle can be as long as once every two months or even longer; a relevant patent can be found in CN113714162A. In contrast, construction site streetlights accumulate dust quickly, potentially requiring cleaning every two weeks. If a water tank is installed, it often runs out of water. Furthermore, the dust accumulated on the photovoltaic panels is merely adhering to the panels (not sticking to them), and in most cases, water washing is unnecessary; simply blowing away the dust is sufficient. Using a dry brush to remove dust only causes it to clump and stick to the photovoltaic panels. Therefore, current photovoltaic panel cleaning structures for highway streetlights are not suitable for construction site streetlights.

[0004] Therefore, this case is brought. Utility Model Content

[0005] The purpose of this invention is to provide a self-cleaning solar street light for construction sites to solve the above-mentioned defects.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A self-cleaning solar street light for construction sites includes a light pole, a light body, and a photovoltaic panel assembly, wherein the photovoltaic panel assembly comprises a photovoltaic panel and a support frame; including:

[0008] A slider is slidably connected to the top front of the photovoltaic panel, and a brush for scraping the photovoltaic panel is provided at the bottom of the slider;

[0009] The air guide pipe is installed on the slider;

[0010] Several jet nozzles are mounted on the slider with the jet direction facing the photovoltaic panel. The air guide pipe is provided with an air outlet corresponding to each jet nozzle and connected to the air inlet of the jet nozzle.

[0011] A slider drive mechanism, mounted on a bracket, is used to drive a slider to slide from one end of the photovoltaic panel to the other.

[0012] An air pump is installed on the light pole, and its air outlet is connected to the air duct through a pipe.

[0013] The control unit, mounted on the lamp, lamp post, or bracket, includes a controller and a rain sensor. The rain sensor is used to sense whether it is raining and the amount of rain, and feeds back the sensing signal to the controller. The controller is used to control the start and stop of the slider drive mechanism and the air pump.

[0014] Furthermore, a push-pull electromagnet is included. The brush includes a brush plate and bristles disposed on the brush plate. The base of the push-pull electromagnet is fixed to the bottom of the slider, and the telescopic end is fixed to the brush plate. The controller is used to control the start and stop of the push-pull electromagnet. When the push-pull electromagnet starts, it retracts, causing the brush to rise and the bristles to detach from the surface of the photovoltaic panel. When the push-pull electromagnet stops, its telescopic end resets, causing the brush to fall and the bristles to adhere to the surface of the photovoltaic panel.

[0015] Furthermore, it includes a guide rod and a return spring. The slider has a vertical through hole through which the guide rod passes. The bottom end of the guide rod is fixed to the brush plate, and the top end is provided with a limiting seat. The two ends of the return spring abut against the limiting seat and the top of the slider, respectively.

[0016] Furthermore, the slider driving mechanism includes a lead screw, a slide bar, and a lead screw driving part. The two ends of the lead screw are mounted on the bracket through bearings. The slide bar is arranged parallel to one side of the lead screw and its two ends are fixed on the bracket. The lead screw driving part is fixed on the bracket and is used to drive the lead screw to rotate. One end of the slider has a through hole and the other end has a threaded hole. One end of the slider is slidably connected to the slide bar through the through hole, and the other end is threadedly connected to the lead screw through the threaded hole.

[0017] Furthermore, the photovoltaic panel is installed at the top of the light pole and is tilted, and the air nozzle is located on the side of the photovoltaic panel that is tilted downwards; in the initial state, the slider is located at the highest position of the photovoltaic panel.

[0018] The advantages of this invention are as follows: By setting a rain sensor, the need for a water tank can be eliminated, allowing rainwater to be used to clean the photovoltaic panels on rainy days. Additionally, an air nozzle and a push-pull electromagnet are added. A strategy is input into the controller to periodically activate the air pump and push-pull electromagnet on non-rainy days. Once the push-pull electromagnet is activated, the brush detaches from the photovoltaic panel, and the air nozzle sprays air onto the panel surface. During the slider's movement, the air nozzle blows away dust particles adhering to the photovoltaic panel surface, achieving dry cleaning. This self-cleaning structure is suitable for dusty construction sites, effectively performing both dry and wet cleaning of the photovoltaic panel surface, reducing the frequency of worker maintenance and lowering maintenance costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the self-cleaning solar street light in the embodiment;

[0020] Figure 2 This is a three-dimensional structural diagram of the self-cleaning mechanism at the photovoltaic panel in the embodiment;

[0021] Figure 3 for Figure 2 A schematic diagram of the structure from another perspective;

[0022] Figure 4 for Figure 2 A side view diagram;

[0023] Figure 5 This is a control block diagram of the self-cleaning mechanism in the embodiment;

[0024] Label Explanation

[0025] 1. Lamp post; 2. Lamp body; 3. Photovoltaic panel; 4. Bracket; 5. Slider; 6. Brush; 601. Brush plate; 602. Brush bristles; 7. Air duct; 8. Air nozzle; 9. Push-pull electromagnet; 10. Guide rod; 11. Return spring; 12. Lead screw; 13. Slide rod; 14. Servo motor; 15. Rain sensor. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the embodiments. It should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicated by the accompanying drawings are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0027] This embodiment proposes a self-cleaning solar street light for construction sites, such as... Figures 1 to 5As shown, the system includes a lamp post 1, a lamp body 2, and a photovoltaic panel assembly. The photovoltaic panel assembly includes a photovoltaic panel 3, an energy storage battery, and a support frame 4. As an innovation, this embodiment incorporates a self-cleaning mechanism to achieve both dry and wet cleaning of the photovoltaic panel 3.

[0028] The self-cleaning mechanism includes at least a slider 5, an air duct 7, multiple air nozzles 8, a slider drive mechanism, a push-pull electromagnet 9, an air pump, and a control unit. The slider 5 is slidably connected to the top front of the photovoltaic panel 3, and its bottom is equipped with a brush 6 for scraping the photovoltaic panel 3. The air duct 7 is mounted on the slider 5. The air pump (not shown in the figure) is mounted on the lamp post 1, and its outlet is connected to the air duct 7 via a flexible pipe. The air nozzles 8 are mounted on the slider 5, with the air jet direction facing the photovoltaic panel 3. The air duct 7 has outlets corresponding to the air nozzles 8, and the air duct 7 connects to the inlets of the air nozzles 8 through these outlets. The slider drive mechanism is mounted on a bracket 4 and is used to drive the slider 5 to slide from one end of the photovoltaic panel 3 to the other. (Reference) Figure 3 The brush 6 includes a brush plate 601 and brush bristles 602 disposed on the brush plate 601. The base of the push-pull electromagnet 9 is fixed to the bottom of the slider 5, and the telescopic end is fixed to the brush plate 601.

[0029] The control unit is mounted on the lamp, lamp post, or bracket, and includes a controller and a rain sensor 15. The rain sensor 15 is used to sense whether it is raining and the amount of rain, and feeds the sensing signal back to the controller. The controller is used to control the start and stop of the slider drive mechanism, the air pump, and the push-pull electromagnet 9. When the push-pull electromagnet 9 is started, it retracts, driving the brush 6 to rise and causing the bristles 602 to detach from the surface of the photovoltaic panel 3. When the push-pull electromagnet 9 stops, its extension end returns to its original position, driving the brush 6 to descend and causing the bristles 602 to adhere to the surface of the photovoltaic panel 3.

[0030] The controller uses an STM32 series microcontroller, which is low-cost, easy to program, and has abundant community support and tutorial resources. The rain sensor 15 can be an optical rain sensor, which provides high-precision measurements and does not require direct contact with rainwater. Therefore, it has lower maintenance requirements in harsh environments (such as dusty construction sites). This sensor can quickly respond to the start and end times of rainfall, facilitating timely start and stop of the self-cleaning mechanism. The inventors have preset the following control strategy in the controller to achieve dual dry and wet cleaning of the photovoltaic panel 3:

[0031] Strategy 1: When it rains, the rain sensor detects the rain and sends feedback to the controller: "It is currently raining, and the rainfall is at level X." X can be a value between 1 and 5. The larger the value of X, the faster the slider 5 slides. When the controller receives the rain signal, it starts the slider drive mechanism, causing the slider to slide back and forth on the photovoltaic panel 3. The brush 6 on the slider 5 works with the rainwater to wash the photovoltaic panel 3, mainly brushing away mud (formed by dust and rainwater condensation), bird droppings, and other dirt that are stuck to the surface of the photovoltaic panel 3.

[0032] Strategy 2: The air pump starts on a timed basis, and when the air pump reaches its start time, the rain sensor should report that it is not raining; otherwise, the air pump will cancel its start. When the air pump starts, the controller simultaneously controls the push-pull electromagnet 9 to start, causing the brush 6 to rise and detach from the photovoltaic panel 3. After the air pump starts and the nozzle 8 sprays air, the controller starts the slider drive mechanism, causing the slider to slide back and forth on the photovoltaic panel 3. During the movement of the slider 5, the nozzle 8 blows away the dust particles attached to the surface of the photovoltaic panel 3, achieving dry cleaning of the photovoltaic panel 3.

[0033] The two strategies are designed to prevent the dry brush from accumulating dust on the photovoltaic panel 3 during dry cleaning.

[0034] All of the above-mentioned components are powered by energy storage batteries in the photovoltaic panel modules.

[0035] Preferably, the slider 5 in this embodiment is provided with a guide mechanism to achieve stable lifting and lowering of the brush 6. Figure 3 or Figure 4 As shown, the slider 5 includes a guide rod 10 and a return spring 11. A vertical through hole is provided on the slider 5, through which the guide rod 10 passes. The bottom end of the guide rod 10 is fixed to the brush plate 601, and a limiting seat is provided at the top end. The two ends of the return spring 11 are respectively abutted between the limiting seat and the top of the slider 5.

[0036] Preferably, the slider driving mechanism in this embodiment adopts a lead screw mechanism, such as... Figure 2 As shown, the slider 5 driving mechanism includes a lead screw 12, a slide bar 13, and a servo motor 14. The two ends of the lead screw 12 are mounted on the bracket 4 via bearings. The slide bar 13 is arranged parallel to one side of the lead screw 12 and its two ends are fixed to the bracket 4. The servo motor 14 is fixed to the bracket 4 and is used to drive the lead screw 12 to rotate. One end of the slider 5 has a through hole, and the other end has a threaded hole. One end of the slider 5 is slidably connected to the slide bar 13 through the through hole, and the other end is threadedly connected to the lead screw 12 through the threaded hole. The controller's control of the slider driving mechanism mainly involves the control of the servo motor.

[0037] In addition, such as Figure 1As shown, the photovoltaic panel 3 is installed at the top of the light pole 1 and is tilted, with the air nozzle 8 located on the downward tilted side of the photovoltaic panel 3. In the initial state, the slider 5 is at the highest position of the photovoltaic panel 3. Thus, when strategy one is implemented, the wastewater brushed out by the brush 6 can slide down the tilted surface of the panel, preventing it from remaining on the photovoltaic panel 3. Similarly, when strategy two is implemented, the air blowing direction is diagonally downward along the photovoltaic panel 3, so that the blown dust does not fall back onto the photovoltaic panel 3 as much as possible.

[0038] The above embodiments are only used to explain the concept of the present invention, and are not intended to limit the protection of the present invention. Any non-substantial modifications made to the present invention using this concept should fall within the protection scope of the present invention.

Claims

1. A self-cleaning solar street light for construction sites, comprising a lamp pole, a lamp body and a photovoltaic panel assembly, the photovoltaic panel assembly comprising a photovoltaic panel and a support; characterized in that, include: A slider is slidably connected to the top front of the photovoltaic panel, and a brush for scraping the photovoltaic panel is provided at the bottom of the slider; The air guide pipe is installed on the slider; Several jet nozzles are mounted on the slider with the jet direction facing the photovoltaic panel. The air guide pipe is provided with an air outlet corresponding to each jet nozzle and connected to the air inlet of the jet nozzle. A slider drive mechanism, mounted on a bracket, is used to drive a slider to slide from one end of the photovoltaic panel to the other. An air pump is installed on the light pole, and its air outlet is connected to the air duct through a pipe. The control unit includes a controller and a rain sensor. The rain sensor is used to sense whether it is raining and the amount of rain, and feeds back the sensing signal to the controller. The controller is used to control the start and stop of the slider drive mechanism and the air pump.

2. A self-cleaning solar street light for construction sites as claimed in claim 1, wherein, The device includes a push-pull electromagnet. The brush includes a brush plate and bristles disposed on the brush plate. The base of the push-pull electromagnet is fixed to the bottom of the slider, and the telescopic end is fixed to the brush plate. The controller is used to control the start and stop of the push-pull electromagnet. When the push-pull electromagnet starts, it retracts, causing the brush to rise and the bristles to detach from the surface of the photovoltaic panel. When the push-pull electromagnet stops, its telescopic end resets, causing the brush to fall and the bristles to adhere to the surface of the photovoltaic panel.

3. A self-cleaning solar street light for construction sites as described in claim 2, characterized in that, It includes a guide rod and a return spring. The slider has a vertical through hole through which the guide rod passes. The bottom end of the guide rod is fixed to the brush plate, and the top end is provided with a limiting seat. The two ends of the return spring abut against the limiting seat and the top of the slider, respectively.

4. A self-cleaning solar street light for construction sites as described in claim 1, characterized in that, The slider driving mechanism includes a lead screw, a slide bar, and a lead screw driving part. The two ends of the lead screw are mounted on the bracket through bearings. The slide bar is arranged parallel to one side of the lead screw and its two ends are fixed on the bracket. The lead screw driving part is fixed on the bracket and is used to drive the lead screw to rotate. One end of the slider has a through hole and the other end has a threaded hole. One end of the slider is slidably connected to the slide bar through the through hole, and the other end is threadedly connected to the lead screw through the threaded hole.

5. A self-cleaning solar street light for construction sites as described in claim 1, characterized in that, The photovoltaic panel is installed at the top of the light pole and is tilted, and the air nozzle is located on the tilted downward side of the photovoltaic panel; in the initial state, the slider is located at the highest position of the photovoltaic panel.

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