FIELD: cooling or freezing equipment.
SUBSTANCE: invention relates to the refrigeration equipment. Refrigerating device (100) comprises closed circuit (C), in which coolant circulates with certain flow rate (1). Circuit comprises capacitor (102) and main branch (M), equipped with piston compressor (101), in which from main branch receives specified flow rate (1-X1; 1-X1-X2) of coolant at specified pressure (P1) of suction, by evaporator (103). First expansion valve (104) is located between the condenser and the evaporator. In addition, the closed loop comprises the first auxiliary branch (105) with the economiser for the first part (X1) of the coolant flow rate (1). First auxiliary branch (105) with economizer communicates compressor (101) with section (106) of closed circuit (C) located between condenser and first expansion valve. Compressor comprises first side inlet (107) for inlet of first portion (X1) of coolant flow rate. First portion of coolant flow rate has such pressure (P8) at inlet that P8-P1≤4 bar.
EFFECT: technical result is higher efficiency of refrigerating cycle.
14 cl, 5 dwg
