REFRIGERANT CIRCULATING SYSTEM

摘要

PURPOSE:To prevent oil of a freezer from being discharged due to a trouble and the like and from being ignited even when an igniting heat source is present by a method wherein a weight solving rate of the oil of freezer into liquid refrigerant having a lubricating function or sealing function or the like under conditions of condensing pressure and condensing temperature has a dissolution characteristic of a specified range. CONSTITUTION:There is provided a compressor 1 in which either single or mixed refrigerant having as its main substance hydrofluorocarbon is used, gaseous refrigerant or gaseous refrigerant containing partially liquid refrigerant is sucked and the refrigerant is discharged as high pressurizing gaseous refrigerant. Oil 6 for a freezer stored within the compressor 1 and acting to lubricate a sliding section of the compressor 1 and seal a compression chamber is set to be soluble with a weight solving rate of the oil 6 of the freezer in respect to the liquid refrigerant being 0.5 to 7% under the condensing pressure at the condensing temperature. With such an arrangement as above, the oil is not ignited even in the case that the oil is discharged due to trouble and the like and an igniting heat source is present, resulting in that there is no possibility that refrigerant or oil stays at an improper location within the refrigerant system.