What are the differences between R22 and R410A during use

We all know that different refrigerants have different usage methods. Today, I will introduce the use of R22 and r410a for everyone. Let us take a look at the differences.

1. R22 refrigerant compressor generally uses mineral oil; R410A refrigerant compressor generally uses organic synthetic oil, common POE (ether), PVE (ester). R410A and mineral oil are not mutually soluble. The mixing of mineral oil (for R22) into the R410A air conditioning system will cause the refrigerant oil to deteriorate and hydrolyze to produce metal salts. In addition, if it is mixed with other refrigerating machine oil, if the refrigerating machine oil is used incorrectly, after the oil is mixed, it will cause sludge and block the capillary tube.

2. The pressure of R410A is about 1.6 times higher than that of R22 refrigerant. Therefore, once the wrong operation occurs in the process of construction and after-sales service, serious accidents may occur. When installing an air conditioner with R410A refrigerant, please use R410A special tools and materials for operation.

3. When installing and moving the air conditioner, please do not mix air other than R410A refrigerant into the air conditioner's refrigerant circulation pipeline. If air and other gases are mixed in, it will cause abnormal high pressure in the refrigerant circulation pipeline, which is the main cause of rupture and cracks in the circulation pipeline.

4. Since the pressure of R410A is relatively high, piping, tools, etc. are used exclusively. The wall thickness of the copper pipe must comply with the amendment proposal of JISB 8607 [flares and connectors used by refrigerants], and the copper pipes allowed to be used by R410A should be selected according to the requirements.

5. R22: In normal operation, the suction pressure is 0.40～0.70Mpa (normal system back pressure≥0.5Mpa. R410A: In normal operation, the suction pressure is 0.70～1.15Mpa (gauge pressure)

6. The compressor is exclusively for R410A; the compressor is not allowed to compress air, which may cause explosion. R410A air conditioners have a filter drier, while air conditioners using R22 refrigerant generally do not have a filter drier.

7. The compressor used in the R410A refrigerant machine is lubricated with POE oil. POE oil and water can react to produce water and acid, and the generated water can promote the further reaction of POE oil. If this chain reaction continues for a long time, the system There will be more and more water, which may cause the capillary tube to be blocked by ice; at the same time, the acidity of the circulating working fluid in the system will become higher and higher (the PH value is lower and lower), which may cause corrosion of the parts in the system. And produce copper plating. When installing the machine, it is forbidden to drip sweat into the connecting pipe; it is strictly forbidden to mix other insoluble impurities into the system.

8. When repairing, as long as the refrigeration system is cut off, whatever it is The reason is to replace the filter drier. During maintenance, if you need to replace parts, use R410A special parts, not mixed with R22.

9. Because of the R410A azeotropic refrigerant, The proportion of R410A component does not change much, so liquid filling can also be carried out (judgment is based on the cooling or heating effect is slightly worse, or the pressure is lower than 15%), but there is more leakage or complete leakage. Vacuum pump must be used for vacuuming , And liquid filling is also necessary.

Some editors of the above information are organized for everyone. Do you know the difference between R22 and R410A in the use process? Hope to bring you some help, If you have a demand for refrigerants, welcome to consult with us.

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