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.

According to different cooling methods, chillers can be divided into two types: water-cooled and air-cooled. Water cooled chillers use cooling towers or cooling water systems to dissipate heat, which have advantages such as high refrigeration efficiency and stable operation, but require additional cooling water systems and space. The air-cooled chiller unit, on the other hand, directly dissipates the heat from the condenser into the air through a fan, without the need for an additional cooling water system. However, it is greatly affected by environmental temperature, and the refrigeration efficiency may be slightly lower.