It is so called air cooled screw chiller because we use screw compressor which is the key component of the chiller and the refrigerant is gas state come out of evaporator. The refrigerant becomes high temperature and high pressure state after it is adiabatically compressed by the compressor. The compressed gas refrigerant is condensed by isostatic cooling in a condenser, and after condensation, it is changed into a liquid refrigerant, and then expanded to a low pressure through a throttle valve to become a gas-liquid mixture. Made with modern and advanced technology, the quality is excellent and elegant shape. It has good performance, low noise, and is adjusted according to load, operate alternately automatically and extend the life-span of the chiller, we procure imported original brand- name equipment as raw material, R22/R407C/134a (optional) refrigerant, using Taiwan "Hanzhong" or Germany "bizell" screw compressor, and intelligent PLC, PC computer controlling system and help us to supervise and remote control the chiller, operation is simple, it is adjustable in time, low malfunction rate and high safety, which has a huge wide application, it is adjustable in time, low malfunction rate and high safety, which has a huge wide application.