Is the refrigerant of the chiller gas-filled?
Regarding whether to charge the refrigerant, whether to add gas or liquid, RICOM Refrigeration will summarize here for your reference.
1. Three concepts
Single working fluid refrigerant, non-azeotropic mixed refrigerant and azeotropic refrigerant, single working fluid refrigerant: the refrigerant composition has only one working fluid; non-azeotropic refrigerant: two or more different refrigerants are mixed in a certain ratio The composition of the gas-liquid two-phase is different when it is saturated; azeotropic refrigerant: an azeotropic mixture formed by mixing two or more different refrigerants in a certain ratio. This type of refrigerant is at a certain pressure It can maintain a certain evaporation temperature, and its gas-liquid two-phase always keeps the composition ratio unchanged.
2.Liquid or gaseous?
1) No matter whether the single working substance refrigerant is gas or liquid, the composition inside will not change, so gas can be charged when charging refrigerant.
2), although the composition of azeotropic refrigerant is different, but because the boiling point is the same, the composition of the gas and liquid is also the same, so it can be filled with gas;
3) Due to the different boiling points of non-azeotropic refrigerants, the actual composition of the liquid refrigerant and the gaseous refrigerant is different. At this time, if the gas is added, the composition of the added refrigerant will inevitably be different, such as only being added. A certain gaseous refrigerant, so only liquid can be added.
3. Why not add liquid at all？
Generally speaking, the final refrigerant charge needs to be added after the equipment is turned on and added from the suction port of the compressor; if liquid refrigerant is added, it is equivalent to the liquid refrigerant entering the suction port of the compressor, which is obviously cause liquid shock of the compressor; damage the compressor.
