REFRIGERATING DEVICE AND HEAT PUMP

摘要

PROBLEM TO BE SOLVED: To provide a refrigerating device and a heat pump that quickly eliminate a shortage of lubricating oil for each compressor.SOLUTION: A refrigerating device 10 comprises: a refrigerant circuit that performs a refrigeration cycle; a communicating tube 31; and a communicating valve 37. The refrigerant circuit comprises: a low-stage compressor 12 that compresses and discharges a refrigerant; a low-stage oil separator 14 that separates lubricating oil from the discharged refrigerant; a high-stage compressor 16 that compresses and discharges the refrigerant from which the lubricating oil was separated; and a high-stage oil separator 18. The communicating tube 31 causes a bottom part of the low-stage compressor 12 to communicate with a bottom part of the high-stage compressor 16. The communicating valve 37 is provided in the communicating tube 31 and controls the lubricating oil in the communicating tube 31.SELECTED DRAWING: Figure 2