It is a fluid circulating to transport energy inside air conditioners, refrigerators, and heat pump hot water heaters. It is a very important substance which hits blood if it says in man.
As a refrigerant, fluorocarbons (carbon and fluorine compounds) are used mainly, and it is generally referred to as fluorocarbons. Fluorocarbons were developed for refrigerators in the 1920s, and at that time they were touted as the chemicals of dreams. CFC (chlorofluorocarbon) and HCFC (hydrochlorofluorocarbon) are ozone depleting substances among fluorocarbons. These substances are called specific fluorocarbons. Since HFC (hydrofluorocarbon) does not have chlorine, it does not destroy the ozone layer, so its conversion has progressed as an alternative to specific fluorocarbons. For this reason, HFC is generally referred to as “alternative fluorocarbon”. However, it is found that alternative fluorocarbons have a greenhouse effect of several hundred times to tens of thousands of times as much as carbon dioxide, which is a problem as a cause of global warming. For this reason, further substitution sought, and even the reduction is required by the Kigali revision described in the future.