Patent ID: 8887516

Claim:
A method of charging a vehicle refrigeration system with a vapor-phase refrigerant, comprising the steps of: predetermining, with a controller, a pressure of the vapor-phase refrigerant that will fully charge the vehicle refrigeration system; transferring the vapor-phase refrigerant from a refrigerant source to the vehicle refrigerant system via an input line; controlling the transferring of the vapor-phase refrigerant with a pressure regulator having a high and low pressure gauge; adjusting a transferred pressure of the vapor-phase refrigerant to the predetermined pressure with the pressure regulator using the controller connected to the pressure regulator; measuring the transferred pressure with a pressure sensor at a location where the vapor-phase refrigerant enters the vehicle refrigeration system; comparing, with the controller, the transferred pressure at the location where the vapor-phase refrigerant enters the vehicle refrigeration system with the predetermined pressure; and stopping the transfer of the vapor-phase refrigerant, with the controller, when the transferred pressure at the location where the vapor-phase refrigerant enters the vehicle refrigeration system is equal to or exceeds the predetermined pressure.