Patent ID: 7762089

Claim:
A refrigeration charging system for charging a refrigeration system of a vehicle with a vapor-phase refrigerant, comprising: a refrigerant source for storing the vapor-phase refrigerant; an input line connected to the refrigerant source and configured to be connected to the refrigeration system of the vehicle; a sensor for detecting a pressure of the vapor-phase refrigerant being introduced into the refrigeration system of the vehicle from the input line; a control valve between the refrigerant source and the refrigeration system of the vehicle; a controller connected to the control valve and the sensor, wherein during a refrigeration charging operation, the controller is configured to close the control valve directly responsive to a pressure of the refrigerant in the refrigeration system of the vehicle detected by the sensor reaching a predetermined pressure; a pressure regulator fluidly connected between the refrigeration system and the control valve, the pressure regulator connected to the controller, wherein the controller is configured to adjust the pressure regulator for regulating the pressure of the vapor-phase refrigerant being introduced into the refrigeration system of the vehicle and set to a predetermined pressure corresponding to a pressure of refrigerant needed to charge the refrigeration system; a high-pressure-side gauge for indicating pressure of the refrigerant entering a high-pressure-side of the pressure regulator; and a low-pressure-side gauge for adjusting and monitoring pressure of the refrigerant leaving the pressure regulator.