Using r404a refrigerants what items need to be aware of
as refrigerant r404a believe everyone through introducing the before to have a certain understanding, so you know about matters need to pay attention to when using r404a refrigerants too? Don't understand it doesn't matter, for everybody to introduce below small make up, and see it together.
using R404A alternative refrigerant R22 refrigerant is the big problem of lubricating oil, must be used PVE ester oil to replace R22 with mineral oil.
the exhaust pressure of refrigerant r404a is about 1 of R22. 2 times, mass flow rate is 1 of R22. 5 times or so, increased exhaust velocity, resistance. Condenser, in general, the change of heat capacity than R22 larger 20% ~ 30%. The same temperature and the saturation pressure of refrigerant R22 as refrigerant R404A is different, so the R404A institution and R22 different thermodynamic expansion valve movement.
due to the saturation pressure is higher than R22 refrigerant R404A, so the system pressure container design pressure to make changes, to ensure safety.
R404A are azeotropic mixed working medium, non azeotropic mixture composition concentration changes with the temperature, pressure, the production of refrigeration system, debugging and maintenance has brought certain difficulties, the heat transfer performance of the system is also can produce certain effect, especially when the refrigerant leakage, all system refrigerant needs emptying displacement, so as to guarantee the proportion of each blend components, and to achieve design refrigeration effect, otherwise it will get worse and worse.
because of refrigerant r404a and lubricating oil has nothing to do with the intermiscibility of water is very good, so the system of water and residue, and cleanliness requirements such as compared with R22 refrigerant are improved, r404a moisture control and impurities control system is an important indicator of the system in the corresponding filter unit, etc. To make changes.
the above about the introduce of refrigerant r404a over here, hope to be able to bring you some help, if you have a demand on refrigerant r404a, welcome consultation discussion with us, we wholeheartedly at your service.
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