| 摘要 |
PROBLEM TO BE SOLVED: To successfully perform an independent heating operation regardless of an outside air temperature.SOLUTION: A refrigerant circuit device 10 includes a refrigerant circuit 10a that has: a main path 20; a high pressure refrigerant introduction path 30 for supplying a refrigerant compressed by a compressor 21 in the main path 20 to a heating interior heat exchanger when the refrigerant is introduced by a four-way valve 22 constituting the main path 20; and a heat radiation path 40 for supplying the refrigerant that has passed through the heating interior heat exchanger to an upstream side of an exterior heat exchanger 23 in the main path 20. The refrigerant circuit device includes: a bypass pipe line 51 that is branched from a refrigerant pipe line 26 connected to the outlet side of the exterior heat exchanger 23 and is connected to a process pipe 218 of the compressor 21; a bypass valve 52 disposed in the bypass pipe line 51 so as to be openable/closable; and control means 10b for introducing the refrigerant compressed by the compressor 21 to the high pressure refrigerant introduction path 30 and making the refrigerant passed through the exterior heat exchanger 23 pass through the bypass pipe line 51 when an independent heating operation is performed.SELECTED DRAWING: Figure 3 |
