REFRIGERATION CYCLE DEVICE

摘要

A refrigeration cycle device (10A) has a refrigerant circuit (11) where a compressor (1), a radiator (2), an expander (3), an oil separator (9), and an evaporator (5) are connected in this order, and also has an oil feeding pipe (7) for connecting the oil separator (9) and piping (13) on the entrance side of the compressor (1). In the oil feeding pipe (7) are arranged a valve (8) whose degree of opening is controllable and a heater (6A) for heating lubrication oil by heat exchange between a high-pressure refrigerant and the lubrication oil. Temperature sensors (12, 14) are provided at the entrance side piping (13) and the evaporator (5), respectively. A controller (15) controls the degree of opening of the valve (8) based on detection values of the temperature sensors (12, 14).