Method for loading refrigerant in an air conditioning system

A method of loading refrigerant into an A/C system from an apparatus for recovering and regenerating the refrigerant, the method comprising the steps of:

• hydraulically connecting the apparatus with the A/C system through a high pressure pipe and a low pressure pipe;
• loading the refrigerant present in a storage container of the apparatus into the A/C system;
• wherein the loading step comprises:
• measuring an initial amount of refrigerant P0 present in the storage container;
• setting a value B of an amount of total refrigerant to be loaded into the A/C system;
• loading into the A/C system, through the high pressure duct and/or the low pressure duct, an amount of refrigerant in liquid phase equal to B−x, wherein x is a predetermined quantity;
• calculating a value by the equation B*=B+m, wherein m is a quantity that is positive, negative or null, the absolute value of m being less than the absolute value of B;
• further loading, for a number i of cycles, where i=1, 2, . . . , n, quantities αi of refrigerant, comprising the steps of:
• measuring an actual amount of refrigerant Pi present in the storage container at the i-th cycle;
• determining by subtraction a value Ti=P0−Pi, where Ti is an overall amount of refrigerant discharged from the storage container as of the i-th cycle;
• calculating a quantity αi by the equation αi=B*−Ti;
• loading into the A/C system an amount of refrigerant in liquid phase equal to αi/2 through the high pressure pipe and/or the low pressure pipe;
• the further loading ending when αi becomes less than a predetermined value ε.