关键词: 空气, 粒子, 吸收, PM_2.5, 专利布局, 专利分析

Abstract: This paper explores the development trends of air cleaner related technology for removing PM_2.5 by analysing the patents on the field.It chooses the patents collected from the abstract database of patents in China to study the patent layout of air cleaners in accordance with the following aspects: the patent application situation, the patent characteristics of important applicants, the patent development trend and so on.The analysis showed that application quantity of patent on the field increased rapidly from 2012. Although the technology began to develop two or three years before, the quantity of patent applications grows quickly and the technology has great potential.Technical constitution of the field was analysed by International Patent Classification (IPC).The research found that major technologies on the field were the filter and air-conditioning system.The analysis showed that most of the applicants were from China and the Chinese applicants take the dominance of the field in China.Colleges has more patents and the colleges focused on the key technology of the air purification.Enterprises involved the application of the technology in special electric apparatus.Domestic applicants in universities and institutes were much more than that in enterprises,so it was necessary to strengthen the cooperation between enterprises and academies and promote the industrialization of the core technology of the field.

Key words: gas, particle, absorption, PM_2.5, patent layout, patent analysis