| 摘要 |
PROBLEM TO BE SOLVED: To provide a vehicular air conditioning system using refrigerant such as carbon dioxide for improving heating performance while reducing the power of a compressor with a reduction in loss due to the resistance of a passage in an internal heat exchanger. SOLUTION: In a heating mode, a controller 15 operates a cycle in which the refrigerant compressed by a compressor 1 for temperature rise is introduced into an indoor radiator 7 for heat exchange with supplied air, the high pressure refrigerant whose heat is radiated by the heat exchange is introduced into a second expansion valve 6, not through the internal heat exchanger 4, and introduced into an outdoor radiator 2 for heat exchange with outside air after the pressure is reduced by the second expansion valve 6, and the refrigerant whose heat is absorbed by the heat exchange is returned to the compressor 1 through a low pressure portion of the internal heat exchanger 4 and circulated therein. COPYRIGHT: (C)2006,JPO&NCIPI
|
