前言:许多空间飞行器(下面简称“飞行器”)对环境湿度有一定的要求。就载有生物的飞行器而言,适当的湿度是维持生命,保持所需活动环境和工作环境的必需条件,对载人飞船更是这样。不适度的湿度环境会影响飞行器各系统的正常运转,如湿度过高,则飞行器的窗口会生成霜雾;飞行器照相系统的胶片在一定的湿度范围内方能正常使用。飞行器的湿度测量和控制并非是一新课题,对此空气调节工程人员已作了大量工作。飞行器的各系统对湿度控制的要求,同地面设备相比更是苛刻。用于飞行器的湿度控制系统必须重量轻、耗功小(最好是无功耗)、可靠性高,且能进行自动控制。同时,还必须注意到在空间失重状态下的传热传质过程又不同于地面。 Foreword: Many spacecraft (hereinafter referred to as “aircraft”) have certain requirements on the ambient humidity. In the case of aircraft containing biologicals, adequate humidity is a necessary condition for the maintenance of living conditions and working conditions, even more so for manned spacecraft. Improper humidity environment will affect the normal operation of the various aircraft systems, such as humidity is too high, the aircraft’s window will generate frost and fog; aircraft camera system film within a certain humidity range before normal use. Humidity measurement and control of the aircraft is not a new issue, for which air conditioning engineers have done a lot of work. The requirements of the various systems of the aircraft for humidity control are even more harsh than the ground equipment. Humidity control systems for aircraft must be lightweight, have low power consumption (preferably no power consumption), have high reliability and are capable of automatic control. At the same time, it must also be noted that the heat and mass transfer processes in space-weightless state are again different from the ground.