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制冷剂被划分为哪些类别？如何从编号上识别它们？制冷剂的种类很多，目前，全世界都统一使用ＡＳＨＲＡＥ（ＡｍｅｒｉｃａｎＳｏｃｉｅｔｙｏｆＨｅａｔｉｎｇ，ＲｅｆｒｉｇｅｒａｔｉｎｇａｎｄＡｉｒ－ｃｏｎｄｉ－ｔｉｏｎｉｎｇＥｎｇｉｎｅｅｒｓ）美国采暖、制冷...
Refrigerants are divided into what categories? How to identify them from numbers? There are many types of refrigerants. At present, ASHRAE (American Society of Heating, Refrigerating and Air-condiing-Engineers) is used uniformly in the United States.