< p> the current market situation for refrigerant R22
refrigerant still firmly occupy the domestic refrigeration industry usage, but because R22 refrigerant for the destruction of the ozone layer has a certain role and has a high greenhouse effect.
So according to related agreement before 2030 will be replacing R22 refrigerant.
So under the precondition of the refrigeration industry have been looking for substitute for R22 refrigerant, R404a is one of the typical kind.
< / p> < p =“文本-风格
'> < / p> < p> of course, although R404a refrigerant and refrigerant R22 refrigerating performance close to, but in actual use process there are some differences, so there must be a lot of attention.
Below we will give you a list about the need to consider when alternative refrigerant R22 as refrigerant R404a specific problem: < / p> < p> 1, in the process of replacement, you first need to consider is the problem of lubricating oil, simply means must use the matching PVE ester oil to replace R22 refrigerant necessary mineral lubricating oil.
< / p> < p> 2, because of the hydrophilic stronger of ester lubricants dehydration nature is poorer, therefore in the process of oil change, as far as possible to avoid the contact with air.
Be sure to use as soon as possible after container kaifeng, use after dealing with seal as soon as possible.
You also need to stay away from the antioxidant, strong alkali, strong acid and so on material.
< / p> < p> 3, in the preservation ester lubricant must be placed in a well-ventilated place, in use process as far as possible to avoid contact with skin and eyes, of course, be careful not to inhale the steam and spray, etc.
< / p> < p> 4, the exhaust pressure of refrigerant R404a is higher than that of R22 almost 1.
2 times, topped R22 refrigerant mass flow rate of 1.
Five times, so under the condition of the exhaust flow rate increases, the flow resistance is increasing.
Therefore when using R404a refrigerant change its heat capacity than when using R22 increased by 20% to 30%;
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