What refrigerant can cause trachea and compressor frosted back?

as for the air conditioning in general circulation principle and refrigerator freezers do not have what distinction, when air conditioning system lack of fluorine showed symptoms of freezers and refrigerators is about the same, a lot of people say air conditioning lack of fluorine tubes ( Back to the trachea) Will frost, actually under the rated working condition of air conditioning, air conditioning system lack of fluorine and then back to the trachea frost phenomenon is not likely to happen, the lack of fluorine after returning the trachea temperature is only higher than the normal gas superheat temperature is higher than normal, the refrigeration cycle principle of common sense, fluorine muffler can frost is indeed have a certain condition, indoor temperature is low or poor ventilation and heat exchange inside; Low environmental temperature and long running machine, evaporator from the entrance to the frost, and more more slowly, with the evaporator until back to the trachea, this is possible, but the lack of fluorine muffler will frost is not set up in all the circumstances.

refrigeration equipment muffler how can frost? Under what circumstances will frost? Must use the science ethics and logic to illustrate this problem.

1 household air conditioning

as refrigerant R22, for example, it is at 0 degrees of saturation table pressure to zero. 399 mpa, when the pressure is lower than 0 degrees after the corresponding temperature, also is the crystallization of water point ( Freezing point) , the pipe outside surface of course would first frost after condensation, this is normal physical reaction and change. So the household air conditioning low pressure is lower than 0. After 399 mpa, connecting pipe will start to frost. 2 household refrigerator

is refrigerant R12, everything, used in the freezer R600a etc. , when the saturation pressure of refrigerant R12 is lower than 2. 11 kg, the saturation pressure of refrigerant R134a has a lower than 0. 193 mpa, the saturation pressure of refrigerant R600a below 0. After 058 mpa pressure table, the saturation temperature are below 0 degrees or, when the temperature is below zero, if the system added refrigerants, refrigerant in the evaporator is not fully be heat transfer ( Endothermic) Produce boiling ( Evaporation) Overheating through small, back to the gas, liquid refrigerant will enter back into the trachea, even in the compressor, will inevitably cause the muffler even compressor frost phenomenon. Three cold storage

cold storage is different, depending on the use of refrigerant thermodynamic properties ( The physical and chemical properties) , as well as the system of evaporation temperature and gas heat, back when the overheating spent hours, such as expansion valve open to spend, or refrigerant in the system too much, the liquid level is too high in the evaporator ( Too much) , back to the gas will be entrained moisture in wet gas compressor is likely to cause fluid and frost.

this is a different system, different in the different refrigerants and the corresponding pressure and temperature, different reaction, and working condition of refrigeration system specific thermal reaction, it is easy to understand the basis of the problem, not misunderstanding and confusing!

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