本SAE航空航天标准（AS）定义了军用飞行器上用于冷却、加热、通风、湿度和污染控制的空气循环空调系统的要求。MIL-E-18927E和JSSG-2009中包含了空调系统的一般建议，其中可能包括作为冷却源的空气循环系统。空气循环空调系统包括调节高温和高压空气以输送至有人居住和设备隔间以及电气和电子设备的部件。本文件适用于开环和闭环空气循环系统。 定义见本文件第5节。

This SAE Aerospace Standard (AS) defines the requirements for air cycle air conditioning systems used on military air vehicles for cooling, heating, ventilation, and moisture and contamination control. General recommendations for an air conditioning system, which may include an air cycle system as a cooling source, are included in MIL-E-18927E and JSSG-2009.Air cycle air conditioning systems include those components which condition high temperature and high pressure air for delivery to occupied and equipment compartments and to electrical and electronic equipment. This document is applicable to open and closed loop air cycle systems. Definitions are contained in Section 5 of this document.