| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigeration cycle device which can avoid oil shortage in a compressor by a simple piping structure.SOLUTION: An erecting passage 424b which communicates with a return-side passage 224 of a rear-seat side expansion valve 22, and erects upwardly rather than the return-side passage 224 is formed at a connecting part 424 of low-pressure piping. Then, the erecting passage 424b is erected immediately following a refrigerant outlet 224b of the return-side passage 224. Therefore, in a front-seat side single operation state of a refrigeration cycle device 10, the return-side passage 224 is filled with the refrigerant in a substantial-liquid phase state by blocking the refrigerant in the substantial-liquid phase state by the erecting passage 424b, and the flow-in of the refrigerant into a rear-seat side evaporator 20 can be thereby stopped substantially by substantially-entirely closing a throttle valve 222c. Accordingly, the flow-in of oil into the rear-seat side evaporator 20 can be prevented by such a simple structure that the erecting passage 424b is formed at the low-pressure piping 42, and oil shortage in a compressor can be avoided.SELECTED DRAWING: Figure 2 |
