火灾是载人航天器运行过程中最重大的危险之一，目前载人航天器中各种灭火方式均有其弊端。细水雾灭火具有环境友好、灭火效率高等优点。通过分析对比现有国内外细水雾灭火器，针对空间站的特殊环境要求，研究了一种活塞式手提细水雾灭火器，其具有结构和制造工艺简单，喷射剩余率小，寿命长，可靠性高等特点。%Fire is one of the fatal dangers on manned spacecraft. Every existing fire extinguishing manner has its own drawback, whereas the water mist fire extinguisher possesses the advantages of environment-friendliness and high efficiency. Through the analysis and comparison of water mist fire extinguishers home and abroad, a piston portable water mist fire extinguisher is studied under the special environment requirement of microgravity. It qualifies such advantages as compact configuration, simple manufacturing process, low remain rate, long life span and high reliability.
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