RING VALVE DESIGN OF REFRIGERATING COMPRESSOR USING NEW REPLACING REFRIGERANT

摘要

Compressor and refrigerant play key roles in the refrigeration system. Owing to the demands of environment protection, the CFCs and HCFCs refrigerants will be phased out in a short time, and the new refrigerants such as R600, R134a, and R407C have been using. As the new refrigerant is selected, the motion regularity of the valve will be changed. The motion regularity of the ring valve of a 2-stage refrigerating piston compressor is simulated, and the calculations are done respectively with refrigerants R717 (ammonia), R22, and R134a. The results show that refrigerants and working conditions of compressor have direct effect on the motion of the ring valve. Comparing the original design parameters of the ring valve with the modified ones, the former are effective to the HCFC refrigerants, the latter have perfect motion of the valve for the new refrigerants, and the refrigeration system performance parameters, such as the input power, the refrigerating quantity and the COP value, are also better. So, the valve design should consider the influences of refrigerant.