Refrigeration system

Abstract

This application provides a refrigeration system. By a regenerator with an inlet on a primary side connected to an outlet of a condenser, an outlet on the primary side connected to an inlet of an expansion valve, an inlet of a secondary side connected to an outlet of an evaporator, and an outlet of the secondary side connected to an inlet of a compressor, a medium-temperature and high-pressure refrigerant liquid discharged from the condenser and a part of a low-temperature and low-pressure refrigerant gas discharged from the evaporator exchange heat in the regenerator, thereby improving subcooling of the refrigerant liquid at the inlet of the expansion valve and superheating of the refrigerant gas at the inlet of the compressor.

What is claimed is: 
     
         1 . A refrigeration system comprising:
 a compressor, a condenser, an expansion valve, and an evaporator connected in sequence by a refrigerant pipeline;   a regenerator with an inlet on a primary side connected to an outlet of the condenser, an outlet on the primary side connected to an inlet of the expansion valve, an inlet on a secondary side connected to an outlet of the evaporator, and an outlet of the secondary side connected to an inlet of the compressor; and   a refrigerant gas delivery pump disposed in a pipeline connecting the inlet on the secondary side of the regenerator and the outlet of the evaporator.   
     
     
         2 . The refrigeration system according to  claim 1 , further comprising:
 an oil separator disposed in a refrigerant pipeline connecting an outlet of the compressor and an inlet of the condenser, or disposed inside the condenser.   
     
     
         3 . The refrigeration system according to  claim 2 , wherein
 the regenerator is a plate heat exchanger.   
     
     
         4 . The refrigeration system according to  claim 3 , wherein
 a flow rate of a refrigerant gas flowing through the refrigerant gas delivery pump accounts for 50% or less of a total flow rate of the refrigerant gas at the inlet of the compressor.   
     
     
         5 . The refrigeration system according to  claim 4 , wherein
 the flow rate of the refrigerant gas flowing through the refrigerant gas delivery pump accounts for 15% to 30% of the total flow rate of the refrigerant gas at the inlet of the compressor.   
     
     
         6 . The refrigeration system according to  claim 4 , wherein
 the evaporator includes a first evaporator outlet and a second evaporator outlet,   the inlet of the compressor is connected to the first evaporator outlet, and   the inlet on the secondary side of the regenerator is connected to the second evaporator outlet.   
     
     
         7 . The refrigeration system according to  claim 2 , wherein
 a refrigerant with which the refrigerant pipeline is filled is a low GWP refrigerant selected from any one of R515B, R513A, or R1234ze.