Air conditioners and refrigerators several commonly used refrigerants respectively?

the classification of the refrigerant is widely used in the tight type refrigerant refrigerant is ammonia and freon and hydrocarbons. According to the chemical composition, refrigerant can be divided into five categories: inorganic compound hydrocarbon refrigerants, refrigerant, freon, full not full hydrocarbon refrigerants and azeotropic mixture refrigerants. On the basis of condensing pressure, refrigerant can be divided into three categories: high temperature ( Low pressure) Refrigerant, medium temperature ( Medium voltage) Refrigerant and low temperature ( High pressure) Refrigerants. Inorganic compounds refrigerant: this kind of refrigerant used early, such as ammonia, NH3） And water ( H2O） , air, carbon dioxide ( 二氧化碳) And sulfur dioxide ( 2) And so on. About inorganic compounds refrigerants, rules, code-named 'R' in the world behind and three Numbers, in which the first for the two digits after the '7' for molecular weight. R718 water. 。 。 And so on. Freon ( Halogen carbon compounds refrigerant) : freon is full all or part of a hydrogen (in hydrocarbons CL） And fluorine ( F) And bromide ( Br） After replace the floorboard of the derivatives. Rules of the world with the 'R' as a symbol of this kind of refrigerant, such as freon R22. 。 。 And so on. Full hydrocarbon: this type of refrigerant mainly methane, ethane, propane, butane and cyclic organic compounds, etc. Code the same as the freon USES the 'R', this kind of refrigerant flammable and explosive, safety is very poor. Such as R50, R170, R290. 。 。 And so on. Not full hydrocarbon refrigerants: this type of refrigerant is mainly ethylene ( C2H4） , propylene ( C3H6) And their derivatives, halogen elements after they R number is '1', more like R113 and R1150. 。 。 And so on. Azeotropic mixture refrigerant: this type of refrigerant is by two or more different refrigerant to must share the mixture of azeotrope, this type of refrigerant in transpiration temperature must can insist on will be under pressure, the gas phase or liquid phase of always adhere to share the same, but their thermal properties are different from before mixing material, using azeotropic mixture can improve the characteristics of the refrigerant. Such as R500, r114. 。 。 And so on. High temperatures, middle temperature and low temperature refrigerant: it is according to the specification of refrigerant transpiration condensation pressure to temperature and room temperature.

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