Regenerator is a kind of subcooler, part of the refrigerant evaporate at temperature higher than that in main evaporator and abservably increase the condensate depression. Economizer provide the system with 2 advantages:
a. Has flexible structure, need less room for install;
b. Easy to install, less cost；
c. High efficiency；
d. Little welding points, more reliable；
e. For structure, there are single-out-tube & single-inner-tube type and single-out-tube & multi-inner-tube type.