Bitzer Compressor Cooling System with Controlled Injection Refrigerant (CIC)

The use of R22 refrigerant instead of R502 in low-temperature refrigeration equipment is associated with the need to fulfill a number of special requirements for the design of the compressor and refrigeration oil. By increasing the R22 condensing pressure, the discharge temperature can quickly reach unacceptable values. With prolonged operation under such conditions, the stability of the oil in the mixture with the refrigerant drops and, as a result, the life of the compressor is reduced. It is possible to reduce the discharge temperature by using a special cooling system that uses a controlled injection of liquid refrigerant into the compressor suction cavity. In relation to Bitzer compressors, such a system is called CIC (Controlled Injection Cooling). The consumer has a reliable way to limit the discharge temperature in four- and six-cylinder reciprocating compressors