耐用稳定冷冻式干燥机的预冷器采用高效换热光滑管壁紫铜管，防止压缩空气中的杂质粘附堵塞钢管表面，影响换热效果和使用寿命；制冷管路设计简单合理，配以名牌高品质制冷零部件。确保冷冻式干燥机经久耐用，稳定运行。安全可靠冷冻式干燥机除制冷压缩机自身保护装置外，还配有空气开关、热过载保护、延时控制功能、自动复位运行功能及能量旁路调节功能（中型以上）；风冷型冷干机制冷系统双向保护控制，防止因环境温度变化而影响制冷效果；水冷型冷干机配有水量自动调节功能，防止因冷却水温度变化而影响制冷效果。确保冷冻式干燥机运行安全可靠。CHARACTERISTICS：The precooler adopts red copper tubes with smooth wall for quick heat exchanging to avoid impurety to build up.The pipeline is well designed.It adopts famous international brand accessories,has long lifespan and high reliability.With air break switch,thermal overload protection,pressure protection,power supply protection,time delay control and automatic reset.Air Cooled Refrigeration Compressed Air Dryers adopt both ways protection control to avoid ambient temperature influence.Water Cooled Refrigeration Compressed Air Dryers is equipped with self-regulation for water supply to avoid cooling water temperature changing.