Method and system for measuring volume of fluid drained from an air conditioning service unit
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United States of America Patent
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Nov 21, 2017
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N/A
app pub date -
Dec 10, 2015
filing date -
Dec 14, 2014
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Abstract
An air conditioning service system includes an accumulator defining an accumulator chamber, a pressure transducer operably connected to the accumulator chamber, a drain valve operably connected to the accumulator chamber, and a controller operably connected to the pressure transducer and the drain valve. The controller includes a processor configured to execute program instructions stored in a memory to determine a volume of liquid drained from the accumulator by: determining a volumetric flow rate of liquid through the drain valve by controlling the drain valve with the controller to an open position for a predetermined period of time; detecting an increased rate of pressure reduction while the drain valve is open; and determining an amount of liquid drained through the drain valve based upon the volumetric flow rate and a total time elapsed between opening the drain valve and the increased rate of pressure reduction.
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