1, by origin:
Imports: Honeywell, DuPont, Daikin, Ineos.
Domestic: Juhua, Dongyue, Meilan, Frost Demon, Golden Cold and Sanmei.
2, according to the refrigerant classification:
R22: Chrysanthemum, Dongyue and Meilan.
R4 10: frost wyrm, Jinleng, Dupont, Honeywell, Daikin or Daikin Akoma.
When the air conditioner is in refrigeration operation, the refrigerant gas with low temperature and low pressure is sucked by the compressor and pressurized into refrigerant gas with high temperature and high pressure.
The high-temperature and high-pressure refrigerant gas releases heat in the outdoor heat exchanger through the condenser (usually air-cooled, that is, the cooling copper tube of the outdoor unit) and becomes a medium-temperature and high-pressure liquid (the heat is taken away by outdoor circulating air).
The medium-temperature and high-pressure liquid will become low-temperature and low-pressure liquid after capillary expansion and depressurization, and the low-temperature and low-pressure liquid refrigerant will become low-temperature and low-pressure gas after heat absorption and evaporation by evaporator (indoor copper pipe) (indoor air will be cooled through the surface of heat exchanger to achieve the purpose of reducing indoor temperature), and the low-temperature and low-pressure refrigerant gas will be sucked by compressor, and so on.
Generally speaking, air conditioning refrigerant is a cycle of compression-condensation-expansion-evaporation in air conditioning system.
Extended data:
Main characteristics of freon for air conditioning;
1, does not destroy the ozone layer. Its molecular formula contains chlorine, so its ozone layer destruction potential (ODP) is 0.055. Global warming potential (GWP) is 0.35.
2. Very low toxicity. Like R22, the allowable concentration is 1000ppm.
3, nonflammable. Combustible polarity in air is 0.
4. High chemical and thermal stability
5. The water solubility is almost the same as R22.
6. It is a mixed refrigerant and consists of two refrigerants.
7. Insoluble in mineral oil or alkylbenzene oil. (compatible with POE[ ester lubricant] and PVE[ ether lubricant]).