초록 ▼

A liquid injection type scroll compressor is used to a refrigerating apparatus using hydrocarbon fluoride refrigerant which does not contain chlorine (HFC-125/HFC-143a/HFC-134a) as an operating fluid and an amount of an injected liquid is controlled according to a discharge temperature of the compre

A liquid injection type scroll compressor is used to a refrigerating apparatus using hydrocarbon fluoride refrigerant which does not contain chlorine (HFC-125/HFC-143a/HFC-134a) as an operating fluid and an amount of an injected liquid is controlled according to a discharge temperature of the compressor. Further, ester oil and/or ether oil is used as refrigerator oil and a dryer is disposed in a refrigerating cycle. With this arrangement, a refrigerating cycle operation can be stably realized in a wide range without almost changing the arrangement of a conventional refrigerating apparatus.

대표청구항 ▼

[ What is claimed is:] [1.] A refrigerating apparatus constituting a refrigerating cycle by sequentially connecting a compressor, a condenser, a liquid receiver, an accumulator, an expansion valve and an evaporator, wherein a triple-mixed refrigerant composed of 40-48 wt % of R-125, 47-57 wt % of R-

[ What is claimed is:] [1.] A refrigerating apparatus constituting a refrigerating cycle by sequentially connecting a compressor, a condenser, a liquid receiver, an accumulator, an expansion valve and an evaporator, wherein a triple-mixed refrigerant composed of 40-48 wt % of R-125, 47-57 wt % of R-143a and up to 10 wt % of R-134a is used as a refrigerant for said refrigerating cycle, ester oil, ether oil, or ester oil and ether oil is used as refrigerator oil, said compressor is composed of a scroll compressor, the downstream side of said condenser is connected to said scroll compressor through a liquid injection piping, and means for controlling an amount of a liquid injected into said compressor is provided in said liquid injection piping, wherein said refrigerator oil is mainly composed of ester oil of fatty acid and having a dynamic viscosity of 2-70 cSt 40.degree. C. and 1-9 cSt at 100.degree. C. and at least two ester linkages in a molecule.