FIELD: refrigerating engineering; vapor compression refrigerating machines. SUBSTANCE: refrigerating system includes compressor with suction chamber, at least one compression chamber connected with suction chamber and exhaust chamber connected with condenser and evaporator forming closed loop; it is also provided with device for protecting the compressor against overheating which includes temperature sensor of gas compressed in compressor, line for feeding part of gas condensed in condense to compressor and regulating device for control of supply of condensed gas to compressor by signal of temperature sensor. Temperature sensor is fitted in exhaust chamber of compressor in way of flow of compressed gas from compression chamber. According to one version, outlet of line feeding part of gas condensed in condenser to compressor is connected with suction chamber and according to other version it is connected with compression chamber of compressor; in this case, provision is made for sensor showing filling of compression chamber with gas being sucked. Supply of condensed gas to compression chamber is effected by signal of this sensor during or after filling it with gas from evaporator. Temperature sensor is fitted in exhaust chamber of compressor in way of flow of compressed gas from compression chamber; condensed gas is injected directly into compression chamber immediately after closing of suction ports or valve. EFFECT: reliable cooling of compressor due to bringing temperature under control to actual temperature of compressed gas; increased refrigeration output due to injection of liquid into compressor without reduction of amount of gas sucked by compressor from evaporator. 17 cl, 7 dwg
