By the mid-1930s, most refrigerators and air conditioners used chlorofluorocarbons – sometimes known under the trademark Freon – which were non-flammable, and safer to use.
到了20世纪30年代中期，大多数冰箱和空调都使用了氟氯化碳，有时以氟利昂的商标命名，它们不易燃，使用起来更安全。
Freon 114
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CNN 10 学生英语 2017年10月合集
I was working on a new type of heat pump that would use water as a working fluid instead of Freon.
JOHNSON：我正在研究一种新型热泵，它使用水而不是氟利昂作为工作流体。
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1,2-Dichlorotetrafluoroethane
![](/Images/godic/202501/14/1,2-dichlorotetrafluoroethane.svg0511.png")
1,2-Dichlorotetrafluoroethane, or R-114, also known as cryofluorane (INN), is a chlorofluorocarbon (CFC) with the molecular formula ClF2CCF2Cl. Its primary use has been as a refrigerant. It is a non-flammable gas with a sweetish, chloroform-like odor with the critical point occurring at 145.6 °C and 3.26 MPa. When pressurized or cooled, it is a colorless liquid. It is listed on the Intergovernmental Panel on Climate Change's list of ozone depleting chemicals, and is classified as a Montreal Protocol Class I, group 1 ozone depleting substance.
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