| 摘要 |
PROBLEM TO BE SOLVED: To provide an air conditioner which enables the operation at an optimum balance point corresponding with cooling load by regulating the quantity of a refrigerant circulating within the system. SOLUTION: The air conditioner is equipped with a compressor 1 for compressing the refrigerant, a gas cooler 2 for condensing the compressed refrigerant, first and second control valves 3 and 4 for depressurizing the condensed refrigerant, and an evaporator 5 for evaporating the depressurized refrigerant; and constitutes a freezing cycle using carbon dioxide as the refrigerant. A liquid reserving container 8 for temporarily reserving the liquid-phase components of the refrigerant is installed between the first and second control valves 3 and 4 arranged in series. Also a refrigerant pipe 6a having passed through the second control valve 4 is passed into the liquid reserving container 8. The refrigerant gas at middle pressure within the liquid reserving container 8 is cooled for condensation, so as to regulate the quantity of the liquid refrigerant within the container by the temperature difference between the saturation temperature at middle pressure and the evaporation temperature.
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