[N-COUNT 可数名词]提纯器;净化器 A purifier is a device or a substance that is used to purify something such as water, air, or blood.
[oft n N]
...air purifiers.
空气清洁器
Oxford
puri·fier/ˈpjʊərɪfaɪə(r); NAmEˈpjʊrɪfaɪər/nouna device that removes substances that are dirty, harmful or not wanted 清洁器;净化器◆an air/water purifier空气╱水净化器purifierpurifierspuri·fier/ˈpjʊərɪfaɪə(r); NAmEˈpjʊrɪfaɪər/