火灾探测器投入运行后很容易受到污染，积累灰尘，使可靠性降低，引起误报和漏报，因此必须进行清洗，使其恢复正常的工作状态。作为其清洗的技术工作原理，主要有两大类，即所谓的“干法”和“湿法”。“干法”是以溶剂“氟里昂”作为清洗介质（就像“干洗”衣物），是应用较 After the fire detectors are put into operation, they are easily contaminated, accumulate dust, reduce reliability, cause false alarms and missed reports, and therefore must be cleaned to restore normal working conditions. As the technical working principle of its cleaning, there are two main categories, the so-called “dry method” and “wet method.” The “dry method” uses solvent “Freon” as a cleaning medium (like “dry-cleaning” clothes), which is a comparative application.