This paper introduces the main composition of direct digital control (DDC) system and presents some typical control examples of air conditioning system in hotel, indicates applying this system can improving running quality and saving energy.

• 通过介绍直接数字控制(DDC)系统的基本构成,并结合饭店空调系统特点,介绍某些典型的控制实例,指出饭店空调设备采用DDC系统进行控制管理,可有效改善系统的运行品质,节省运行能耗。