FIELD: machine building.
SUBSTANCE: circuit (2) of coolant consists of compressor unit (38) of low pressure having outlet (42) of low pressure coolant in sub-circuit (4) of low pressure and compressor unit (8) of high pressure having inlet (12) of coolant of high pressure in sub-circuit (6) of high pressure. By fluid medium outlet (42) of coolant of low pressure and inlet (12) of coolant of high pressure are connected to each other. Circuit (2) also has reservoir (56) for oil by means of inlet pipeline (54) for low pressure oil connected with sub-circuit (4) of low pressure for reception of oil in it and connected with sub-circuit (6) of high pressure through outlet (62) of oil. Further, circuit (2) has receiver (22) in sub-circuit (6) of high pressure, discharge line (72) connecting receiver (22) with reservoir (56) for oil and delivery valve (74) in discharge line (72).
EFFECT: increased operational reliability.
16 cl, 4 dwg
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