Should I add gas or liquid when charging refrigerant?

1. We first look at what type of refrigerant is used.

• Simplex refrigerant: The refrigerant has only one component.

• Non-azeotropic mixed refrigerant: Refrigerants mixed with more than two different refrigerants in a certain ratio, in the saturated state, the ratio of each component of gas and liquid is different.

• Azeotropic refrigerant: Azeotropic refrigerant made by mixing two or more different refrigerants in a certain ratio, which can maintain a certain evaporation temperature under a certain pressure and its gaseous state and liquid state always keep the same composition ratio.

2. Gaseous or liquid state?

• Simplex refrigerant: No matter it is gaseous or liquid, the composition inside will not change, so it can be charged with gaseous state when charging refrigerant.

• Non-azeotropic refrigerant: Because the boiling point is different, the composition of liquid refrigerant and gaseous refrigerant is actually different, so if you add gaseous state, it will definitely lead to the different composition of the refrigerant added, such as only a certain gaseous refrigerant is added, so it has to be added of liquid state.

• Azeotropic refrigerant: Although the composition is different, but because the boiling point is the same, so the composition of gas and liquid is also the same, so it can be charged with gaseous state.

3. Why can't both be charged with liquid state?

A lot of people may think, since it is so difficult to distinguish, why can't they all be charged with liquid state? Wrong, we all know that, refrigerant charging finally needs to be added after the equipment is turned on, and it is added from the suction port of the compressor, if liquid refrigerant is added, it is equivalent to the compressor suction port into all liquid refrigerant, which will damage the compressor.

4. Handling of common refrigerants

I know, you may think this is too complicated. Here is a summary of common refrigerants for your reference .

1) Add gaseous refrigerant: R13, R134a, R22, R23, R290, R32, R500, R600a.

2) Add liquid refrigerant: R401A, R410A, R410B, R407C, R404A.

Thanks for reading, if you have any doubts about refrigerants, we are happy to help.

Henbincool