The normal and safe operation of the chiller is inseparable from the refrigerant. It is the working medium that circulates in the chiller refrigeration system to achieve refrigeration. The commonly used refrigerant types for chillers are: R22, R407C, R404A, R410A, R134A, R507... Because R22 refrigerant is not environmentally friendly, most countries have now banned the use of R22. Therefore, for Omar chillers, high temperature The chiller uses R407C refrigerant, and the low-temperature chiller uses R404A. Of course, R134a, R410A, etc. can also be used according to user requirements. So, how to choose the appropriate refrigerant type for the chiller?

R22: Because R22 destroys the ozone layer, many countries have now banned the use of R22. Therefore, the chillers we export are generally R407C systems, unless customers require special requirements.

R407C: R407C is a mixture of R32 refrigerant and R125/refrigerant plus R134a refrigerant in a certain proportion. It is an environmentally friendly refrigerant that does not destroy the ozone layer. R407C has very similar characteristics and performance to R22, so it has become a long-term alternative to R22. At present, it is the most widely used refrigerant in the chiller system, which is environmentally friendly and economical. The chiller with R407C refrigerant is affordable.

R404A: As R404A belongs to the HFC type non-azeotropic environmentally friendly refrigerant (completely does not contain ozone-depleting CFC, HCFC), it is currently recognized and recommended by most countries in the world as a mainstream low-temperature environmentally friendly refrigerant. It is widely used in low-temperature chiller systems. middle.

R410A: It is a new environmentally friendly refrigerant that does not contain chlorine and does not destroy the ozone layer. Because the working pressure is about 1.6 times that of the ordinary R22 chiller, the cooling (warming) efficiency is high, and the material requirements for the chiller condenser and evaporator are Higher, therefore, the price of R410A chiller is higher than R22 and R407C. The new R410A refrigerant is composed of two quasi-azeotropic mixtures R32 and R125 each with 50%, mainly composed of hydrogen, fluorine and carbon elements (expressed as hfc), which is stable, non-toxic, and superior in performance. R410A was once recognized as the most suitable refrigerant to replace R22, and it has been popularized in Europe, America, Japan and other countries. R410A replaces the global trends in major international markets and prospects for its use and the dynamics of entering the international market.

R134a (is one of the most widely used medium and low temperature environmentally friendly refrigerants. It has good comprehensive performance, making it a very effective and safe alternative to R12 (dichlorodifluoromethane), which can be applied to the use of R12 refrigeration In most areas of refrigerant. Because the cooling effect of R134A is much lower than that of R22 and R407C, the cost of the R134A chiller system is much higher than that of R22/R407C under the same cooling capacity requirement.

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