Refrigerant Gases can be divided into three categories: single-component refrigerants, non-azeotropic refrigerants, and azeotropic refrigerants.
The single-component freon does not change in its gaseous or liquid state, so it can be filled with a refrigerant when it is filled with refrigerant.
Although the azeotropic Freon gases has different compositions, since the boiling points are the same, the components of the gas and liquid are the same, so that the gas can be filled;
Since the non-azeotropic refrigerant has different boiling points, the liquid refrigerant and the gaseous refrigerant are actually different in composition. At this time, if the gas is added, the refrigerant composition added will inevitably be different, for example, only a certain gaseous state is added. Refrigerant, so only liquid can be added.
That is to say, non-azeotropic refrigerants must be added with liquids. Non-azeotropic refrigerants start with R4. This type of non-azeotropic refrigerants are: R401A, R403B, R404A, R406A , R407A, R407B, R407C, R408A, R409A, refrigerant R410A, R507A.
As for other common refrigerants gases of CFC gases, HCFC gases, HFC gases, such as: R134a (car refrigerant gas r134a), R22, R23, R290, R32, , R600a, no matter whether it is adding with gas or liquid, it will not affect the composition of the refrigerant. Work as what you like.