The chiller unit can also be classified based on factors such as the type of compressor, type of refrigerant, refrigeration capacity, and control method. For example, according to the type of compressor, chillers can be divided into piston type, screw type, centrifugal type, etc; According to the type of refrigerant, it can be divided into ammonia refrigeration units, Freon refrigeration units, etc.

The core components of a chiller unit include a compressor, condenser, evaporator, and throttling device. The compressor is responsible for compressing the refrigerant into high-temperature and high-pressure gas, while the condenser cools the high-temperature and high-pressure gas into high-pressure liquid through cooling water or air, releasing heat into the environment. Subsequently, the high-pressure liquid is depressurized through a throttling device and enters the evaporator, where it absorbs heat and evaporates, thereby reducing the temperature of the cooling water. Finally, the low-temperature and low-pressure refrigerant vapor is sucked in again by the compressor, starting a new cycle.