Patent ID: 8621879

Claim:
A method of charging an air conditioning system, the method comprising: determining a desired amount of refrigerant to be used in the air conditioning system; transferring less than the desired amount of the refrigerant to the air conditioning system; adding an incremental amount of the refrigerant to the air conditioning system during an initial pulse period; dividing a value representing a remaining amount of the refrigerant needed to attain the desired amount by a value representing the incremental amount of the refrigerant to obtain a result; multiplying the result by the initial pulse period to determine a subsequent pulse period; adding a subsequent incremental amount of the refrigerant to the air conditioning system during the subsequent pulse period; dividing a value representing an updated remaining amount of the refrigerant needed to attain the desired amount by a value representing the subsequent incremental amount to obtain an updated result; multiplying the updated result by the subsequent pulse period to obtain an updated pulse period; and adding an additional incremental amount of the refrigerant to the air conditioning system during the updated pulse period.