Cooling history can be traced back to ancient times, when to water and some of the evaporation process.
Later, people invented the refrigerants, refrigerant development into the 21st century has many types, the following is to introduce some common refrigerants in the life.
Codes of freon R22, not burning explosion toxicity slightly bigger than a R12, water solubility is bigger than R12, but still can make the refrigeration system & other;
Ice jam & throughout;
R22 can partially and the lubricating oil dissolve each other, its solubility with lubricating oil type and temperature change, therefore using R22 refrigeration system must have the oil return measures.
Corresponding to the evaporation temperature of R22 under standard atmospheric pressure for -
8 ℃, temperature condensing pressure no more than 15.
105 Pa, refrigerating capacity and the unit volume is bigger than R12 by more than 60%.
In air conditioning equipment, mostly choose R22 refrigerant.
Everything refrigerant as the most widely used in low temperature environmental protection refrigerants, because HFC -
134 a good comprehensive performance, make it become a kind of very effective and safe CFC -
12 alternatives, mainly applied in the field, in the use of the majority of refrigerant R12 include: refrigerators
, freezers, water dispensers, auto air conditioning, central air-conditioning, dehumidifier, cold storage, commercial refrigeration, ice water machine, ice cream machine, refrigeration condensing units, refrigeration equipment, at the same time also can be used in aerosol propellant, medical, aerosol, insecticides aerosol propellant polymer (
Physical foaming agent, and magnesium alloy shielding gas, etc.
R404a is a kind of mixed refrigerants of can't afford to ozone destruction.
It is used in R - in the field of commercial refrigeration system
And R - 502
22 the substitutes for a long time.
404 a is widely used in supermarket frozen cabinet, refrigerator, cabinets, transport refrigeration, ice machine, etc.
Refrigerant R407c is a kind of damage to the ozone layer can't afford to effect of mixed refrigerants.
Because of its performance and as
22 is very close, it is applied in the field of refrigeration system as
22 long-term alternative, used in all kinds of air conditioning system and the centrifugal refrigeration system.
407 c is widely used in household air conditioner, small and medium-sized commercial house, bus, train air conditioning, etc.
Is a new type of environmentally friendly refrigerant R410A refrigerant, not damage the ozone layer, the working pressure for the common R22 air conditioner 1.
Refrigeration (about 6 times,
Improve the performance of air conditioning does not destroy the ozone layer.
New refrigerant R410A composed of two kinds of quasi azeotropic mixture, mainly include hydrogen, fluorine and carbon element, has a stable, non-toxic, superior performance, etc.
At the same time as a result of not containing chlorine, so will not react with ozone, can neither destroy ozone.
In addition, the adoption of new refrigerant air conditioning again in terms of performance will be improved.
R410A is by far the most appropriate internationally recognized to replace R22 of refrigerant, and in Europe and the United States, Japan and other countries
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