Patent ID: 7895844
Filing Date: 2011-03-01
Classification: B60H,F25B

Abstract:
1. A method of filling an air conditioning system in a vehicle with a weighed amount of a CO 2 refrigerant delivered selectively in either a gas or a liquid form, the method consisting essentially of: providing a single CO providing an internal pressure bottle into which an amount of CO locating the internal pressure bottle on a weighing unit for recording the amount of refrigerant deposited in the internal bottle prior to filling the air conditioning system; when the CO drawing the CO conveying the heated, pressurized CO passing a portion of the delivered CO maintaining said refrigerant gas circulation until a desired temperature and weight of refrigerant gas has accumulated in the internal pressure bottle, whereupon the air conditioning system is filled by: closing the first valve and the second valve; stopping the compressor; providing a fill valve in a line in fluid communication with the air conditioning system; opening the fill valve and without using a pump, allowing the refrigerant to flow from the internal pressure bottle to the air conditioning system to fill the air conditioning system while monitoring the weighing unit to determine when a desired amount of the CO and when the CO drawing the CO conveying the heated, pressurized CO expanding the cooled pressurized CO maintaining said refrigerant gas circulation and a temperature in the internal bottle below 31.8° C. until a desired weight of liquid refrigerant has accumulated in the internal pressure bottle, whereupon the air conditioning system is filled by: closing the first valve and the second valve; stopping the compressor; opening the fill valve and without using a pump, allowing the refrigerant to flow from the internal pressure bottle to the air conditioning system to fill the air conditioning system while monitoring the weighing unit to determine when a desired amount of the CO