| 摘要 |
To provide a refrigeration cycle apparatus with improved heating capacity and improved efficiency under a low-outdoor-air-temperature condition. In the refrigeration cycle apparatus according to the present invention, a compressor, a condenser, an ejector, and a gas-liquid separator are connected in series with a refrigerant pipe; a liquid refrigerant outlet of the gas-liquid separator, an evaporator, and a refrigerant suction port of the ejector are connected in series; an internal heat exchanger and a first flow control valve are connected in series between the condenser and a refrigerant inlet of the ejector; a gas refrigerant outlet of the gas-liquid separator is connected to a suction port of the compressor; a first bypass circuit is formed that connects a refrigerant outlet of the condenser to an intermediate pressure portion of the compressor via a second flow control valve and the internal heat exchanger; and a second bypass circuit is formed that connects a refrigerant outlet of the internal heat exchanger to the liquid refrigerant outlet of the gas-liquid separator via a third flow control valve. While the second flow control valve is opened such that the refrigerant flows through the first bypass circuit, the fourth flow control valve is switched to be opened or closed, and the third flow control valve is switched to be closed or opened. |
