Refrigerant circulating apparatus and method of assembling a refrigerant circuit

摘要

A refrigerant and a refrigerating machine oil circulate together while the refrigerant is subjected to a cycle of consecutive compression, condensation, pressure reduction, and evaporation. The refrigerating machine oil exhibits nonsolubility or very weak solubility in terms of rate by weight of solubility of the refrigerating machine oil in the liquid refrigerant both under conditions of condensing pressure and temperature and under conditions of evaporating pressure and temperature. A liquid accumulating container (54) is arranged downstream of a condenser (52). Means are provided for setting the temperature and/or pressure in the container (54) such that the rate of solubility of the oil in the refrigerant in the container is approximately equal to or higher than the oil circulation rate of the oil which flows out from the compressor (1) during operation.