| 摘要 |
A car air conditioner having a high COP, low GWP, and high reliability, wherein a simple refrigerant R32 is charged into a refrigerant circuit 1 of the car air conditioner, the simple refrigerant R32 being high in COP and low in GWP but liable to be polarized and produce contaminant and sludge and, due to vibration and shock of a car, the contaminant and sludge being difficult to be stuck in an electric expansion valve 6, whereby the reliability of the car air conditioner is increased and the simple refrigerant R32 can be re-used easily after collection because the refrigerant is of simple substance type.
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