Patent ID: 8578725
Filing Date: 2013-11-12
Classification: F25B

Abstract:
1. An air conditioning apparatus comprising: a refrigerant circuit including a first shut-off mechanism disposed on a downstream side of the receiver and on an upstream side of the liquid refrigerant connection pipe in the refrigerant circuit when the cooling operation is performed, the first shut-off mechanism being configured to shut off passage of the refrigerant; a second shut-off mechanism disposed on a downstream side of the heat source-side heat exchanger and on an upstream side of the receiver in the refrigerant circuit when the cool operation is performed, the second shut-off mechanism being configured to shut off passage of the refrigerant; a communication pipe interconnecting a refrigerant detection mechanism disposed on an upstream side of the second shut-off mechanism in the refrigerant circuit when the cooling operation is performed, the refrigerant detection mechanism being configured to detect a state quantity relating to the quantity of the refrigerant existing on the upstream side of the second shut-off mechanism; an operation controlling element configured to perform a refrigerant quantity determination operation in which a refrigerant quantity determining element configured to determine properness of the quantity of the refrigerant inside the refrigerant circuit based on the state quantity relating to the quantity of the refrigerant that the refrigerant detection mechanism has detected when the refrigerant quantity determination operation is performed.