Abstract: Household floor washer belong to the hand-held wet and dry vacuum cleaners among the vacuum cleaners, which is popular in the market because of its functions of absorbing water and mopping the floor. Analyze the technical evolution of the floor washer from the perspective of patents, and demonstrate the research and development history, current status and future development trends in the field of floor washer by analyzing the timeline, application areas, applicants and technological innovation point layout of domestic and foreign patent applications. At the same time, as more and more Chinese companies enter the floor washer industry, there are also more and more related patent disputes. From the perspective of patents, explore how Chinese floor washer companies can cope with risks.

Key words: Floor washer, Patent, Vacuum cleaner, Patent layout