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Is the refrigerant gas or liquid?[]

by:Arkool     2021-03-19

Regarding whether the refrigerant is charged in a gas or liquid state, many masters must have known for a long time. I often see people inquiring about this refrigerant when it is charged, in the gas state? Still liquid? Here is a summary for your reference.

1. Three concepts

Single working substance refrigerant, non-azeotropic mixture refrigerant and azeotropic refrigerant , Single refrigerant refrigerant: There is only one refrigerant component; non-azeotropic refrigerant: a refrigerant mixed with two or more different refrigerants in a certain ratio. It is composed of two phases of gas and liquid in a saturated state. Different components; azeotropic refrigerant: azeotropic mixture formed by mixing two or more different refrigerants in a certain ratio. This type of refrigerant can maintain a certain evaporation temperature under a certain pressure, and its gas-liquid two-phase always maintains its composition The ratio remains the same.

2. Liquid or gas?

1) Regardless of whether the refrigerant is gaseous or liquid, the composition inside will not change, so the gaseous state can be charged when the refrigerant is charged.

2) Although the composition of the azeotropic refrigerant is different, 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), Non-azeotropic refrigerants have different boiling points, so liquid refrigerants and gaseous refrigerants are actually different in composition. At this time, if you add gas, it will inevitably lead to different refrigerant components, such as only a certain gaseous state. Refrigerant, so only liquid can be added.

4. Why can't we add liquids?

Many friends who saw this, muttered in their hearts, since it is so difficult to distinguish, I will add no matter what refrigerant If it’s liquid, just make sure the ingredients are the same. Wrong, very wrong; we all know that, in general, the final refrigerant charge is to add after the equipment is turned on, and add it from the suction port of the compressor

; if you add liquid refrigerant , Which is equivalent to the liquid refrigerant entering the suction port of the compressor, which will obviously cause the liquid shock of the compressor; damage the compressor.

5. Summarize common refrigerants in liquid or gaseous state

Having said so much, many friends can't stand it, here is a summary of common refrigerants Whether to add liquid or gas, for your reference when repairing.

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

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

There are so many refrigerants, I believe my friends can't remember it clearly. One sentence tells you the secret: As long as the refrigerant at the beginning of R4* is added to the liquid state, the rest is added to the gas state.


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