These must be paid attention to when using automobile air conditioning refrigerants!

The hot summer is here again. Whether it is driving or staying at home, air conditioning has become an indispensable part, and the use of car air conditioning has become more and more frequent. Let’s talk about the main performance of refrigerants below. What are the indicators?

The working medium that completes the refrigeration cycle in refrigeration equipment is called refrigerant. According to the characteristics of automobile air-conditioning refrigeration system, the following performance requirements are put forward for the refrigerant used.

(1) The latent heat of evaporation is large, and it is easy to liquefy.

(2) Good chemical stability, not easy to deteriorate.

(3) The working temperature and pressure are moderate.

(4) No corrosion to metal objects.

(5) Does not burn or explode.

(6) Non-toxic and non-polluting.

(7) It can be miscible with compressor lubricating oil in any proportion.

When using air-conditioning refrigerant, pay attention to the following matters.

(1) Confirm what kind of refrigerant the car uses in the air conditioning system.

(2) The refrigerant is volatile, so it should be kept away from direct sunlight, stoves and other heat sources. Adding refrigerant should be done at low temperature.

(3) Refrigerant will evaporate rapidly under atmospheric pressure, and will frostbite the skin. Avoid entering the eyes when adding it.

(4) Although CFC-12 is non-toxic or low-toxic, it produces poisonous gas when it comes in contact with flames.

(5) The operation site should be well ventilated.

(6) XH-7 should be selected as the desiccant of HFC-134a, and the dosage should be increased.

(7) The two refrigerants of HFC-134a and CFC-12 cannot be mixed.

(8) Seals, rubber hoses, testing instruments and filling tools in the two refrigeration systems cannot be mixed.

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