The types of air conditioning refrigerant and distinction

refrigerant is also called the refrigerating agent, is the working medium of refrigeration cycle, the current can be used for material has more than 80 kinds of refrigerants, ammonia and freon is the most commonly used class, water and a small number of hydrocarbons, etc. Now almost every household has installed the air conditioner, air conditioning refrigeration major is actually air conditioning is punctuated with air conditioning refrigerants, air conditioning refrigerant like refrigerator refrigerants, actually, today is to tell everyone about the types of air conditioning refrigerant, and air conditioning refrigerants have what features.

air conditioning refrigerant species widely used in the compression type refrigerants refrigerants are ammonia and freon and hydrocarbons.

according to the chemical composition, refrigerant can be divided into five categories:

inorganic compounds refrigerants, freon, saturated hydrocarbon refrigerants, unsaturated hydrocarbon refrigerants and azeotropic mixture refrigerants.

according to the 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.

common freon refrigerant R12, R22, r114 and R1341a, because of other types of refrigerant has now stopped or disabled.

freon 12 ( CF2CL2，R12) : is a kind of freon refrigerant application more, mainly for medium and small food bank, household refrigerator and water, road refrigerated transportation are widely used in refrigeration equipment.

freon 22 ( CHF2CL，R22) : is a kind of freon refrigerant application more, mainly used in household air conditioner and cryogenic refrigerator.

freon 502 ( R502) : r114 consists of R12, R22 to 51. 2% and 48. The percentage of 8% mixture of azeotropic solution.

freon 134 a ( C2H2F4，R134a) : is a relatively new type of refrigerants, its evaporation temperature was minus 26. 5℃。

freon R410A is slowly tended to be a kind of refrigerants in air conditioning. Belong to the environmental protection refrigerants.

the characteristics of air conditioning refrigerant

1. Have certain absorbent, so it is not in 'ice plug' formed in the refrigeration system, affect the normal operation.

2。 Should have certain absorbent, so it is not in 'ice plug' formed in the refrigeration system, affect the normal operation.

3。 Should have chemical stability: no combustion, no explosion, don't break down in use, not bad. And the refrigerant itself or with the mixed such as oil, water, corrosion of metal should not have a significant effect, effect on swelling of sealing material should be small. Safety requirements.

4。 , because of the refrigerant leak during running requirement working medium without damage to human health, non-toxic, no stimulation.

on the market at present the use of air conditioning refrigerant R410A, R410A appearance not cloudy, colorless, volatile, boiling point - 51. 6 ℃, freezing point - 155℃; Its main features are:

1. Does not destroy the ozone layer. Its molecular formula does not contain chlorine, therefore its ozone depletion ozeme depletion potential ( ODP) To zero. Global warming ozeme depletion potential ( GWP) Less than zero. 2.

2。 Very low toxicity. Permissible concentration and R22, too, are 1000 PPM.

3。 Don't burn. The flammable in air polarity is 0.

4。 High chemical and thermal stability of

5. Water solubility and R22 is almost the same.

6。 Is mixed refrigerant, is composed of two kinds of refrigerants

7. Not with mineral oil or alkyl benzene oil miscibility. ( With POE [ Ester lubricants] ,通过 Ether lubricating oil] Miscibility)

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