| 摘要 |
[Purpose] To provide a vehicle air-conditioning apparatus which can ensure a dehumidifying ability even during an intermediate thermal load time where an outside air temperature becomes high during a dehumidifying heating operation time. [Solution] In a vehicle air-conditioning apparatus, at least a compressor 6, a first heat exchanger 2, a first refrigerant control part 9 which is formed by connecting a first expansion device 7 and a first open/close valve 8 in parallel to each other, a vehicle exterior heat exchanger 4, a second refrigerant control part 13 which is formed by connecting a second expansion device 12 and a second open/close valve 11 in series, and a second heat exchanger 3 are connected in the preceding order in a loop. A refrigerant flow path between the first heat exchanger 2 and the first refrigerant control part 9 and a refrigerant flow path between the second refrigerant control part 13 and the second heat exchanger 3 are connected with each other by a first bypass flow path 21 provided with a third refrigerant control part 16 formed by connecting a third expansion device 15 and a third open/close valve 14 in series, and a refrigerant flow path between the vehicle exterior heat exchanger 4 and the second refrigerant control part 13 and a refrigerant flow path between the second heat exchanger 3 and the compressor 6 are connected with each other by a second bypass flow path 22 which is opened or closed by a fourth open/close valve 17. |
