The automobile ownership in the United States accounts for almost one-fifth of the global automobile ownership, with sedans as high as 1 300 million vehicles, with an average of 1 vehicle per 1.3 people. According to statistics, there are less than 30000 car wash shops. How do so many vehicles ensure that they are as clean as new? Previously, self-service car washing has become a part of American daily life, with self-service coin operated card swiping car washing equipment widely distributed in various gas stations, highway service areas, large parking lots, urban and rural communities, and other places.