Patent ID: 9453668
Filing Date: 2016-09-27
CPC Classification: F25B

Claim Text:
1. A refrigeration cycle apparatus, for circulating a refrigerant, including an ejector having a driving refrigerant inlet into which a driving refrigerant flows, a suction refrigerant inlet into which a suction refrigerant flows, and a mixed refrigerant outlet through which a mixed refrigerant which is a mixture of the driving refrigerant and the suction refrigerant flows out, the refrigeration cycle apparatus comprising: a first refrigerant path in which a discharge side of a compressor, a condenser, a first flow control valve, a refrigerant storage container which stores excess refrigerant, a second flow control valve, and a first evaporator are connected in this order via pipes and a refrigerant outlet of the first evaporator is connected to the suction refrigerant inlet of the ejector via a first pipe; a second refrigerant path in which the mixed refrigerant outlet of the ejector, a second evaporator, and a refrigerant inlet side of the compressor are connected in this order via pipes; a third refrigerant path which branches from a branch portion in a middle of a pipe connecting a refrigerant outlet of the condenser and the first flow control valve in the first refrigerant path and is connected to the driving refrigerant inlet of the ejector via a third pipe; a bypass which branches from a downstream side of the refrigerant storage container and an upstream side of the second flow control valve in the first refrigerant path on a downstream side of the branch portion and is connected between the mixed refrigerant outlet of the ejector and the second evaporator via a bypass pipe in the second refrigerant path and a bypass flow control unit is provided in a middle of the bypass pipe, which controls a flow rate of the refrigerant; and a driving flow control unit which adjusts a flow rate of the refrigerant flowing as the driving refrigerant into the driving refrigerant inlet of the ejector via the third refrigerant path; and a controller which controls the opening degrees of the driving flow control unit and the bypass flow control unit, wherein opening degrees of the driving flow control unit and the bypass flow control unit are controlled to control a flow rate of the refrigerant, and the controller determines the opening degree of the bypass flow control unit, and controls the opening degree of the driving flow control unit if determining that the opening degree of the bypass flow control unit is in a closed state.