The origin of everyday moods

A refrigerant fluid charging device that comprises an expansion valve, a charging tube for connecting the outlet of the expansion valve to the system to be charged, a thermally conductive tube enveloping the charging tube, and a thermal sensing tube connected to the expansion valve, the sensing tube being in temperature sensing contact with the conductive tube at spaced locations and at one of such locations being adapted to be brought into temperature sensing contact with the suction line of the system to be charged. The method includes the steps of providing a charging device in accordance with the foregoing, connecting the inlet of the expansion valve with a source of refrigerant fluid, connecting the charging tube to the suction line of the system to be charged, bringing the thermal sensing tube at one location thereof into temperature sensing contact with the system suction line, and initiating flow of refrigerant fluid from the source of supply through the expansion valve and charging line to the system suction line, and permitting flow of fluid into the system until the expansion valve is automatically closed under the influence of the sensing tube.