Automatic cleaning system used for residential photovoltaic system and judgment method

Abstract

The invention discloses an automatic cleaning system used for a residential photovoltaic system and a judgment method. The automatic cleaning system comprises a pressurizing module and a spraying module, tap water in residential houses, well water or natural lakes are taken as water sources, and water is sprayed out by the spraying module after being pressurized through the pressurizing module, sothat water droplets are evenly sprayed to the surface of a photovoltaic module, natural rainfall is simulated, and the cleaning purpose is achieved; and a control module comprises a site sensing unit, a data collecting unit, a backstage analysis unit and a front end control unit, the site sensing unit detects the surface cleanliness degree of the photovoltaic module in real time and transmits a signal to a data collecting unit, the data collecting unit collects the signal of the site sensing unit and transmits the signal to the backstage analysis unit, after judgment and analysis by the backstage analysis unit, the signal is sent out again, the signal that whether cleaning is conducted or not is output through the front end control unit to the pressurizing module. According to the scheme,the automatic cleaning system can complete intellectualization operation and optimization efficiency of automatic cleaning through the control module according to actual demand analysis.

Description

technical field [0001] The invention belongs to the field of residential photovoltaic systems, and in particular relates to an automatic cleaning system and a judging method for residential photovoltaic systems. Background technique [0002] Photovoltaic modules are the basic unit of solar power generation, and their conversion efficiency directly affects the power generation of solar photovoltaic power generation systems. The photovoltaic modules of the residential photovoltaic system are placed on the roof and exposed to the external environment for a long time. Dust or other pollutants will adhere to the surface of the photovoltaic module, which will reduce its conversion efficiency to solar energy, thereby affecting the power generation of the photovoltaic system. In severe cases It will lead to local hot spot effect, which will further affect the performance and life of photovoltaic modules. It can be seen that it is very necessary to regularly remove dust and pollutio...

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Problems solved by technology

[0003] At present, the traditional methods for cleaning solar photovoltaic systems mainly include: 1. Cleaning by jetting with water trucks and high-pressure water guns. The disadvantage of this method is that it wastes a lot of water resources. At the same time, for cold regions, the cleaning will be affected by the seasonal temperature; 2. Manual wiping. The disadvantage of the method is that it needs to invest more manpower and material resources, and there are certain safety hazards in manual work.

In the existing technology for automatic cleaning of photovoltaic modules, there are generally the following methods: 1. Simply rely on reciprocating movements such as scraping, brushing, and rollers to remove dust on the surface of the module. The disadvantage of this method is: the dust removal effect is not good , there are mechanical transmission parts, which are prone to failure and may easily cause scratches on the surface of photovoltaic modules. The cleaning parts need to be cleaned or replaced regularly, which increases cost investment; The disadvantages of the method are: the cleaning medium is limited to water (rainwater), and the operation will be limited by the ambient temperature. In the northern region, it is very cold in winter, and all material pipelines have the risk of freezing and cracking when there is water inside; , brushes, rollers, etc. are used in combination with the water system. The disadvantages of this method are: the structure is too complicated, the investment is too high, and the promotion is poor

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