초록 ▼

The supercritical refrigerating apparatus has refrigerant bypass means for bypassing a heat exchanger according to a physical value of the refrigerant. Therefore, the temperature of refrigerant on a suction side of the compressor becomes lower than that of refrigerant sucked into the compressor via

The supercritical refrigerating apparatus has refrigerant bypass means for bypassing a heat exchanger according to a physical value of the refrigerant. Therefore, the temperature of refrigerant on a suction side of the compressor becomes lower than that of refrigerant sucked into the compressor via the heat exchanger. As a result, the refrigerant temperature in a refrigerant passage extending from a suction side to a discharge side of the compressor is decreased, thereby preventing breakage of the compressor.

대표청구항 ▼

[ What is claimed is:] [1.] A supercritical refrigerating apparatus comprising:a compressor for compressing refrigerant;a gas cooler for cooling said refrigerant discharged from said compressor, said gas cooler having an inside pressure exceeding a critical pressure of said refrigerant;a pressure co

[ What is claimed is:] [1.] A supercritical refrigerating apparatus comprising:a compressor for compressing refrigerant;a gas cooler for cooling said refrigerant discharged from said compressor, said gas cooler having an inside pressure exceeding a critical pressure of said refrigerant;a pressure control unit for decompressing said refrigerant discharged from said gas cooler and for controlling a pressure of said refrigerant on an outlet side of said gas cooler according to a temperature of said refrigerant on the outlet side of said gas cooler;an evaporator for evaporating said refrigerant decompressed by said pressure control unit;a gas-liquid separator which separates said refrigerant discharged from said evaporator into gas phase refrigerant and liquid phase refrigerant, and discharges said gas phase refrigerant toward a suction side of said compressor;a heat exchanger having a first refrigerant passage for a flow of said refrigerant discharged from said gas cooler, and having a second refrigerant passage for a flow of said gas phase refrigerant discharged from said gas-liquid separator, for performing heat exchange between said gas phase refrigerant discharged from said gas-liquid separator and said refrigerant discharged from said gas cooler;refrigerant bypass means for bypassing one of said first and second refrigerant passages of said heat exchanger according to a physical value of said refrigerant, wherein;said physical value is a temperature of said refrigerant at a predetermined point between an outlet of said compressor and an inlet of said pressure control unit; andsaid refrigerant bypass means bypasses one of said first and second refrigerant passages, when said refrigerant temperature at said predetermined point is higher than a predetermined temperature, such that a temperature of said gas phase refrigerant flows into said suction side of said compressor is decreased.