在盘管制冷剂温度低于+32F（OC）的情况下运行的任何空气单元冷却器都会积累霜或冰，并且这种霜或冰的持续积累将对空气单元冷却器的性能产生负面影响。因此，需要除霜以将系统恢复到设计效率。空气机组除霜是我们行业多年经验开发的最先进技术。在中央制冷系统中，有四种常见的除霜方法:空气、电、热气和水。为了成功除霜，有必要将冰（霜）从空气单元冷却器盘管上取下，以提供将除霜冰（霜）从单元中带走的方法，并在不损坏系统设备（主要指压缩机）的情况下完成除霜循环。引文:研讨会，ASHRAE交易，第81卷，第2部分，马萨诸塞州波士顿

Any air unit cooler operating with a coil refrigerant temperature below +32F (OC) is subject to the accumulation of frost or ice,and the continuous accumulating of this frost or ice will have a negative effect on the performance of the air unit cooler. Therefore, defrosting is required to restore the system to design efficiency.Defrosting of air units is a state of the art developed in our industry by many years of experience. In central refrigeration systems there are four common methods of defrosting: air, electric, hot gas, and water. In order to have a successful defrost it is necessary to get the ice (frost) off of the air unit cooler coil to provide means to carry the defrosted ice (frost) away from the unit, and to complete the pefrost cycle without damage to the system equipment, meaning principally, the compressor.