Patent ID: 9488397
Filing Date: 2016-11-08
CPC Classification: F25B,G01F

Claim Text:
1. A method of charging a coolant into a cooling system through a length of conduit comprising: connecting an outlet end of the length of conduit to the cooling system; supplying coolant to an inlet end of the length of conduit, the length of conduit extending without interruption from the inlet end of the length of conduit to the outlet end of the length of conduit; providing a meter on the inlet end of the length of conduit which controls a valve located at the outlet end of the length of conduit; charging the coolant through the length of conduit to the cooling system, the meter controlling an amount of coolant delivered to the cooling system by controlling the valve at the outlet end of the length of conduit; monitoring a density of the coolant during the charging by: recording a temperature of the coolant and a pressure of the coolant in the length of conduit to determine a precise charging amount the coolant supplied to the cooling system, wherein the temperature and pressure of the coolant are recorded at the inlet end of the length of conduit and at the outlet end of the conduit, the length of conduit having a known interior volume and the density determined at both the inlet end of the conduit and the outlet end of the conduit so as to determine a density difference indicative of an amount of coolant emptied from the length of conduit into the cooling system due to the length of conduit and a pressure drop between the inlet to the length of conduit and the outlet to the length of conduit.