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US 6,105,386 AGranted
Supercritical refrigerating apparatus
AssigneeDenso Corporation
InventorsYasutaka Kuroda, Shin Nishida
Life of this patent
Estimating the term…
Abstract
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.
Claims6
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;
- and
- said 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.
7 more elements
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 pressure of said refrigerant at a predetermined point between an outlet of said pressure control unit and an inlet of said compressor;
- and
- said refrigerant bypass means bypasses one of said first and second refrigerant passages, when said refrigerant pressure at said predetermined point is lower than a predetermined pressure, such that a temperature of said gas phase refrigerant flows into said suction side of said compressor is decreased.
7 more elements
Dependencies are inferred from the claim text.