With the phasing out of refrigerant R22
, R410A refrigerant using range is more and more big, the refrigeration, many friends asked whether R22 directly replace R410A in dispatching system, which is unreasonable.
Two kinds of refrigerant different physical and chemical parameters, the differences in system design, need to pay attention to.
The difference of the refrigerant R22 and R410A 1, R410A refrigerant requires a synthetic refrigeration oil (
, due to the high hygroscopicity, POE oil prone to hydrolysis, relative to R22, R410A system more strict with moisture moisture content.
2, perfusion after reducing heat exchanger structure, R410A system relative R22 perfusion to decrease about 20% ~ 30%.
Bigger than R22, R410A system of total heat transfer characteristics of heat transfer efficiency is high, the heat exchanger can be miniaturized.
3, R410A for HFC -
And HFC -
125 mixture refrigerant R410A for copper tube is more demanding, and R22 can use normal brass;
R410A operation pressure is higher than R22 50 ~ 70%, about 1.
4, R410A belongs to low toxicity, no combustion propagation, does not destroy the ozone layer, R22 is fatal for ozone destruction;
R410A system refrigeration capacity, better if R22 refrigeration capacity 100%, R410A refrigeration capacity 147%;
5, even R410A does not destroy the ozone layer, but can produce greenhouse gases, the effect of greenhouse gases produced by the even greater than the R22.
Therefore, R410A and not air-conditioning final environmental protection refrigerants solutions in China.
Ha ha, all those who say is environmental protection refrigerant R410A buddy, you can rest.
6 is larger than that of R22, R410A vapor density is big, so R410A steam flow rate compared with R22 slow about 30%;
R410A is more soluble than R22.
When particles floating in R410A, can smoothly circulate in the system.
Other note 1, R410A copper pipe must use high strength compressive special copper pipe, spare parts must also use a dedicated.
R410a copper tube can be used in place of the ordinary R22 brass, but absolutely can't use ordinary R22 pipe to replace R410a.
2, new refrigerant R410A fission when installed, shall not be used and R22 air conditioning connecting pipe and confused refrigerants.
3, R410A air-conditioner installed high requirements.
Don't connect the sweat drip into the tube, don't put other insoluble impurities into the system.
In the refrigeration encyclopedia suggestion system of pumping air into vacuum state, not cause refrigerant mixture of pollution when 4, maintenance, if cut the refrigeration system, it is necessary to change the filter drier, and time of the refrigeration system is exposed to the air shall not be more than five minutes.
5, R410A refrigerant should be stored in environment under 30 ° C, if in more than 30 degrees C in the environment, must be under 30 degrees of environment for more than 24 hours before using.
6, R410A system using four-way valve have a clear requirement on cleanliness, and R22 system using four-way valve for cleanliness requirements.
7, the cut-off valve design maximum working stress is different, use refrigerant R22 to 3.
0 mpa, the use of refrigerant R410A is 4.
R22 is 3.
0 MPa brass connector, R410A is 4.
3 MPa stainless steel fittings.
8, pressure switch, pressure value is different, R22 system usually choose 3.
. two survivors.
4 mpa, R410A system often choose 4.
9, rated voltage, R22 compressor system each displacement (
Heat capacity of about 175 w, R410A compressor system each displacement (
The capacity of about 245 w, is about 65% ~ 70% of R22 system.
10, seg has marked equipment cooling system using what type refrigerant, indicate what refrigerant is what kind of refrigerant, cannot leave R22 directly replace R410a.
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