By a combination of theoretical analysis and performance testing, it is shown that refrigerant mixture R407C is a drop-in substitute for R22 in inverter heat pump air-conditioners.
通过理论分析及空调器整机性能试验， 说明混合工质R407C是变频冷暖空调器中R22 的灌注式替代工质。
It is urgent to substitute R134a for R12 in air-conditional equipment for military shelter because of the ban on using R12 for refrigerant.
由于制冷剂R12禁用期限的日益临近，对其进行替代已是迫在眉睫的问题。
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