| 摘要 |
<p>A binary refrigeration cycle device is provided with: a high-temperature-side refrigeration circuit in which a high-temperature-side compressor, a high-temperature-side condenser, a high-temperature-side expansion unit, a cascade heat exchanger, and a high-temperature-side accumulator communicate via a high-temperature-side refrigerant pipe; a low-temperature-side refrigeration circuit in which a low-temperature-side compressor, the cascade heat exchanger, a low-temperature-side expansion unit, a low-temperature-side evaporator, and a low-temperature-side accumulator communicate via a low-temperature-side refrigerant pipe; a high-temperature-side bypass circuit which connects the discharge side of the high-temperature-side compressor and the inlet side of the high-temperature-side accumulator; a high-temperature-side bypass valve which is provided in the high-temperature-side bypass circuit; and a control means which opens the high-temperature-side bypass valve if the outside air temperature is a predetermined temperature or lower at the time of startup.</p> |
