Automatic cleaning device for solar photovoltaic panel

Abstract

The utility model discloses an automatic cleaning device for a solar photovoltaic panel. The automatic cleaning device mainly comprises a storage, transmission and distribution system and a control system, the storage, transportation and distribution system mainly comprises a cleaning agent storage device and a gas driving device, an outlet of the cleaning agent storage device is provided with a pneumatic container valve, an outlet end of the pneumatic container valve is connected to an inlet end of a selector valve through a safety valve, a liquid one-way valve and a pressure reducing valve, and an outlet end of the selector valve is directly connected with a nozzle through a pressure signal feedback device; one side of the outlet end of the gas driving device is connected with the selector valve, and the other side of the outlet end of the gas driving device is connected with the pneumatic container valve of the cleaning agent storage device through a pneumatic control one-way valve. According to the utility model, 24-hour unattended operation and cleaning can be realized, any external equipment or resource is not needed, the cleaning effect is good, and the efficiency is high; and three control modes of automatic cleaning, manual cleaning and mechanical emergency operation are realized. In conclusion, the utility model greatly reduces the manpower and operation maintenance cost of the solar photovoltaic panel.

Description

TECHNICAL FIELD

[0001] The utility model belongs to photovoltaic power generation technical field especially relates to a solar photovoltaic panel's automatic cleaning device. BACKGROUND

[0002] With the continuous development of photovoltaic power generation technology, the construction of photovoltaic power station is also increasing, and the application of solar photovoltaic panel is also gradually increasing. A large amount of dust and impurities will inevitably accumulate on the surface of photovoltaic panel during a long period of use, and even local hot spot effect will be caused under the shelter of sundries, which will burn the components seriously. Therefore, in order to ensure the safety of daily operation of photovoltaic matrix area and improve the power generation efficiency of photovoltaic components, it is necessary to clean the photovoltaic components regularly. At present, the cleaning methods are divided into manual cleaning, semi-automatic cleaning and automatic cleaning, but there are the following problems: 1. The cleaning effect consistency is poor, which is easy to cause wear and tear to the photovoltaic components; 2. External consumables such as water source and power supply are needed, and the operation cost is high; 3. A certain number of full-time personnel are needed for operation and control, and the cleaning reaction speed is slow, and the cleaning cycle is long. SUMMARY

[0003] The utility model solves the technical problem to provide a kind of solar photovoltaic panel's automatic cleaning device, to realize solar photovoltaic panel unattended timely cleaning, indirectly improve power generation efficiency while greatly reduce manpower and operation and maintenance cost.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme:

[0005] The automatic cleaning device of solar photovoltaic panel is mainly composed of storage and delivery system and control system. The storage and delivery system mainly includes cleaning agent storage device and gas driving device. The outlet of the cleaning agent storage device is provided with a pneumatic container valve. The outlet end is connected to the inlet end of the selection valve through a safety valve, a liquid check valve and a pressure reducing valve. The outlet end of the selection valve is directly connected to the spray head through a pressure signal feedback device. The gas driving device is provided with an electromagnetic container valve. One side of the outlet end is connected to the selection valve, and the other side is connected to the pneumatic container valve of the cleaning agent storage device through a gas control check valve.

[0006] The components of the storage and delivery system are connected through a flow collecting pipe.

[0007] The control system mainly includes an infrared detection sensor, an automatic cleaning controller, a pressure signal feedback device and a battery pack. The battery pack is connected to and powers the automatic cleaning controller. The automatic cleaning controller is connected to and controls the infrared detection sensor, the pressure signal feedback device and the electromagnetic container valve.

[0008] The battery pack is connected to and powers the automatic cleaning controller through a conversion inverter.

[0009] The infrared detection sensor, the pressure signal feedback device and the spray head are arranged on the solar photovoltaic panel.

[0010] The output end of the solar photovoltaic panel is electrically connected with the input end of the storage battery pack, the output end of the storage battery pack is electrically connected with the input end of the conversion inverter, the output end of the conversion inverter is electrically connected with the input end of the automatic cleaning controller, and the output end of the automatic cleaning controller is electrically connected with the pressure signal feedback device and the electromagnetic container valve respectively.

[0011] The automatic cleaning controller adopts a numerical control charging controller.

[0012] In view of the problem of cleaning the solar photovoltaic panel, the inventor designs an automatic cleaning device for the solar photovoltaic panel, which mainly comprises a storage and distribution system and a control system; the storage and distribution system mainly comprises a cleaning agent storage device and a gas driving device, the cleaning agent storage device is provided with a pneumatic container valve at an outlet thereof, the outlet end of the cleaning agent storage device is connected to the inlet end of a selection valve through a safety valve, a liquid check valve and a pressure reducing valve, and the outlet end of the selection valve is directly connected with a spray head through a pressure signal feedback device; the gas driving device is provided with an electromagnetic container valve, one end of the outlet end of the gas driving device is connected with the selection valve, and the other end of the outlet end of the gas driving device is connected with the pneumatic container valve of the cleaning agent storage device through a gas control check valve.

[0013] Compared with the prior art, the automatic cleaning device for the solar photovoltaic panel has the following beneficial effects:

[0014] 1. Unattended and cleaning for 24 hours can be realized, and the device can react quickly and agilely in case of an emergency;

[0015] 2. The device is powered by the photovoltaic panel and stores energy, and does not need any external equipment or resources, thereby achieving energy saving and environmental protection to the maximum extent;

[0016] 3. The cleaning agent is a gaseous mixture, the cleaning effect is good and the efficiency is high, and the surface of the photovoltaic panel is free of mechanical collision and friction;

[0017] 4. The control mode adopts a pneumatic valve, and the device has three control modes, i.e. automatic cleaning, manual cleaning and mechanical emergency operation, and the device has high applicability and reliability in extremely harsh outdoor environments.

[0018] In summary, the automatic cleaning device for the solar photovoltaic panel realizes unattended and timely cleaning of the solar photovoltaic panel, indirectly improves the power generation efficiency, and greatly reduces the labor cost and operation and maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of the automatic cleaning device for the solar photovoltaic panel.

[0020] Figure 2 is a control principle schematic view of the automatic cleaning device for the solar photovoltaic panel.

[0021] In the figure: 1 cleaning agent storage device, 2 gas drive device, 3 gas control check valve, 4 safety valve, 5 liquid check valve, 6 pressure reducing valve, 7 selection valve, 8 pressure signal feedback device, 9 spray head, 10 infrared detection sensor, 11 automatic cleaning controller, 12 conversion inverter, 13 battery pack. DETAILED DESCRIPTION

[0022] I. Basic structure

[0023] As Figure 1 shown, the automatic cleaning device of the solar photovoltaic panel mainly consists of a storage and delivery system and a control system.

[0024] The storage and delivery system mainly includes a cleaning agent storage device 1 and a gas drive device 2. The cleaning agent storage device is provided with a pneumatic container valve at the outlet. The outlet end is connected to the inlet end of the selection valve 7 through the safety valve 4, the liquid check valve 5 and the pressure reducing valve 6. The outlet end of the selection valve is directly connected to the spray head 9 through the pressure signal feedback device 8. The gas drive device is provided with an electromagnetic container valve. The outlet end is connected to the selection valve on one side and connected to the pneumatic container valve of the cleaning agent storage device through the gas control check valve 3 on the other side. The components of the storage and delivery system are connected through a flow collecting pipe. Among them,

[0025] The cleaning agent storage device can be filled with IG541 gas or a mixture with other cleaning agents. The filling amount is determined according to the cleaning agent concentration of the photovoltaic panel surface ≥28.1% and the use time. The use time is considered to be not less than 72 hours. The working pressure should meet the requirements of the current national "Gas Cylinder Safety Supervision Regulations" and "Pressure Vessel Safety Technology Supervision Regulations", which is not less than the working pressure and resistance loss of the delivery system under the highest environmental temperature, such as 15.0MPa (first filling pressure).

[0026] The gas drive device can be filled with nitrogen. The filling amount and working pressure meet the requirements of operating and controlling the selection valve and the pneumatic container valve of the cleaning agent storage device.

[0027] The action pressure of the safety valve is determined according to the working pressure of the cleaning agent storage device. In this example, it can be taken as 20.7±1.0MPa. The working pressure of the spray head is controlled by the pressure reducing valve and determined according to the acceptable pressure of the surface of the solar photovoltaic panel. When the pressure in the cleaning agent storage device and the gas drive device drops by more than 90% of the design pressure, the gas should be supplemented or the storage bottle should be replaced in time.

[0028] The collecting pipe can adopt stainless steel pipe, the pipe quality meets the relevant provisions in the current national standard "Stainless Steel Seamless Steel Pipe for Fluid Conveying" (GB / T 149976), the pipe diameter is determined according to the flow velocity, the pipe diameter ≤DN80 is connected through threads, the pipe diameter >DN80 is connected through flanges, and the connecting parts are sealed tightly.

[0029] The control system mainly comprises an infrared detection sensor 10, an automatic cleaning controller 11 (referring to the brand Mettler Toledo Technology, EasyClean 500), a pressure signal feedback device 8 (referring to the brand Sichuan Witelong, HXF0.6 / 17.2-WTL) and a battery pack 13; the battery pack is connected and powered through a conversion inverter 12 to the automatic cleaning controller. The automatic cleaning controller is connected and controls the infrared detection sensor, the pressure signal feedback device and the electromagnetic container valve respectively. The infrared detection sensor, the pressure signal feedback device and the spray head are arranged on the solar photovoltaic panel. The control system further comprises a collection and control interface, the output end of the solar photovoltaic panel is electrically connected with the input end of the battery pack, the output end of the battery pack is electrically connected with the input end of the conversion inverter, the output end of the conversion inverter is electrically connected with the input end of the automatic cleaning controller, and the output end of the automatic cleaning controller is electrically connected with the pressure signal feedback device and the electromagnetic container valve respectively. The automatic cleaning controller adopts a numerical control charging controller. Among them,

[0030] The infrared detection sensor selects the detector with the shortest reaction time and the highest sensitivity, and can adopt a first-level product according to the national standard "Design Specification for Fire Automatic Alarm System" GB 50116.

[0031] The capacity of the battery pack is determined according to the power of the control system, so as to ensure that the storage bottle is replaced at least once in a normal cleaning period.

[0032] II. Operation

[0033] As shown in Figure 2 The automatic cleaning device of the solar photovoltaic panel has three control modes of automatic cleaning, manual cleaning and mechanical operation.

[0034] The automatic cleaning mode: when dust or foreign matters appear on the solar photovoltaic panel, the infrared detection sensor acts first, the alarm signal is sent to the automatic cleaning controller, the controller opens the electromagnetic container valve on the gas driving device, the gas driving device drives the pneumatic container valve and the selection valve of the cleaning agent storage device, the cleaning agent gas is uniformly transported to the solar photovoltaic panel area through the distribution pipeline and the spray head, and the dust or foreign matters are blown and cleaned. At the same time, the pressure switch arranged on the gas conveying pipeline feeds back the action signal to the automatic cleaning controller, and confirms that the photovoltaic panel is clean.

[0035] Manual cleaning mode: when there is someone in the photovoltaic area, the automatic cleaning controller can be switched to "manual" state, that is, the device is in electrical manual control state. If the photovoltaic panel is found to be abnormal, the worker first visually checks it, and then decides whether to use manual cleaning or to open the start-stop button on the controller, and the device will directly start cleaning.

[0036] Mechanical operation mode: when the power fails or the infrared detection sensor and the control system fail to execute the instructions, the device system can also use mechanical manual control. The worker can directly open the selection valve and the container valve through the manual starter to release the cleaning agent and implement cleaning. When using the automatic control start mode, to prevent there being a worker near the photovoltaic panel who has not left, the spray head is delayed for 30s to spray. When the number of selection valves in the system is two or more, the control selection valve is opened before or at the same time as the opening of the pneumatic container valve of the cleaning agent storage device.

Claims

1. An automatic cleaning device for solar photovoltaic panels, characterized in that... The system is mainly composed of a storage and delivery system and a control system; the storage and delivery system mainly comprises a cleaning agent storage device and a gas driving device, the cleaning agent storage device is provided with a pneumatic container valve at its outlet, the outlet end of the cleaning agent storage device is connected to the inlet end of a selection valve through a safety valve, a liquid check valve and a pressure reducing valve, the outlet end of the selection valve is directly connected to a spray head through a pressure signal feedback device; the gas driving device is provided with an electromagnetic container valve at its outlet end, one side of the outlet end is connected to the selection valve, and the other side is connected to the pneumatic container valve of the cleaning agent storage device through a gas control check valve.

2. The automatic cleaning device of solar photovoltaic panels according to claim 1, characterized in that: The components of the storage and delivery system are connected through a manifold.

3. The automatic cleaning device of solar photovoltaic panels according to claim 1, characterized in that: The control system mainly comprises an infrared detection sensor, an automatic cleaning controller, a pressure signal feedback device and a battery pack; the battery pack is connected to and supplies power to the automatic cleaning controller, the automatic cleaning controller is connected to and controls the infrared detection sensor, the pressure signal feedback device and the electromagnetic container valve.

4. The automatic cleaning device of solar photovoltaic panels according to claim 3, characterized in that: The battery pack is connected to and supplies power to the automatic cleaning controller through a conversion inverter.

5. The automatic cleaning device of solar photovoltaic panels according to claim 3, characterized in that: The infrared detection sensor, the pressure signal feedback device and the spray head are all arranged on a solar photovoltaic panel.

6. The automatic cleaning device of solar photovoltaic panels according to claim 5, characterized in that: The output end of the solar photovoltaic panel is electrically connected to the input end of the battery pack, the output end of the battery pack is electrically connected to the input end of the conversion inverter, the output end of the conversion inverter is electrically connected to the input end of the automatic cleaning controller, and the output end of the automatic cleaning controller is electrically connected to the pressure signal feedback device and the electromagnetic container valve.

7. The automatic cleaning device of solar photovoltaic panels according to claim 3, characterized in that: The automatic cleaning controller adopts a numerical control charging controller.

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