Why some refrigerant must add liquid, so analysis much more easy to remember

Refrigerants of R22 gas or liquid? R410A refrigerant gas or liquid? Most of the time these questions will be asked, today we will arrange for you the related material, to completely understand, why some refrigerant must add liquid? Now let's look at the principle of charging refrigerant: 1, the principle of filling a, liquid filling for general use is liquid refrigerant inside the cylinder, the cylinder upside down, by adding the liquid tube to the refrigeration system is a liquid refrigerant. But there are part of the cylinder of fluoride mouth can reach to the bottom of the cylinder, the cylinder is though, are made, but added the liquid refrigerant. B, gas filling filling gas refrigerants, the actual meaning is the refrigerant cylinders is made; Because the upper cylinder space is gaseous refrigerant, so is the gaseous refrigerant of the refrigeration system is added and now. 2, why do you want to add a gaseous and liquid, three concepts of single working medium refrigerants, non azeotropic mixed refrigerant and azeotropic refrigerant; There is only one single refrigerant substance: refrigerant components working medium; Such as R22, R290; Non azeotropic refrigerants: two or more different refrigerant mixture to a certain percentage of the refrigerants, it in saturated state, the composition of gas liquid two phase composition; For example, R404A, R410A; Azeotropic refrigerants: there are two or more different refrigerant mixture to a certain percentage of the azeotrope, this kind of refrigerant under certain pressure can keep certain evaporating temperature and the composition of gas liquid two phase keep ratio unchanged. For example: R500, R508A; B, liquid or gas? 1) Whether gaseous or liquid refrigerant, single working medium inside composition will not change, so the filling refrigerant can filling gas. 2) , azeotropic refrigerants although composition is different, but the boiling point is the same, so the composition of gas and liquid two same, so you can filling gas; 3) , non azeotropic refrigerants due to the boiling point is different, so the liquid refrigerant and gas refrigerant composition is not the same, actually as if gas, will inevitably lead to add refrigerant components, such as only added a gaseous refrigerant, so can only add the density of its liquid. 3, how to distinguish the simplex system, azeotropic, non azeotropic? A, simplex system, azeotropic refrigerant can filling gas; Non azeotropic refrigerant must be filling liquid; B, azeotropic refrigerants in the standard stipulated in the behind the R of the first number is '5', behind the two Numbers according to the practical order number. R507c, non azeotropic refrigerants: in refrigerant in the standard number of non azeotropic refrigerants are not numbered, only leaving behind R number order no. 400, for the use of supplementary Numbers. R411 see understand? Summary in a word, 'R4' heading refrigerants, if you need filling refrigerant, please add liquid! !
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