Purge
AssigneeAmerican Standard International Inc.
InventorsRichard M. Heiden, Robert J. Roth, Brian T. Sullivan, Steven E. Wolfgram, Lori Ann Manning
Life of this patent
Estimating the term…
Abstract
A purging device for a system accumulating condensable and non-condensable gases. The purging device comprises: a purge tank; apparatus receiving the condensable and non-condensable gases from the system and directing said gases into the purge tank; apparatus condensing the non-condensable gases into a condensed form; apparatus accumulating the non-condensable gases in a header space; apparatus returning the condensed gases from the purge tank to the system; apparatus controllably removing the accumulated non-condensable gases from the header space; and apparatus generating controlled flow in the condensable and non-condensable gases.
Claims6
A method of controlling the pumpout of a purge tank which contains non-condensable gases extracted from a refrigeration system, the method comprising the steps of:
- pulsing an outlet control valve for a predetermined a mount of time;
- determining a pumpout initiate setpoint;
- measuring temperature associated with the purge tank;
- and
- modifying the removal rate as a function of the difference between the measured condition and the pumpout initiate setpoint.
A system for controlling the pumpout of a purge tank which contains non-condensable gases extracted from a refrigeration system, the system comprising:
- means for pulsing an outlet control valve for a predetermined amount of time;
- means for determining a pumpout initiate setpoint;
- means for measuring temperature associated with the purge tank;
- means for comparing the measured temperature with the initiate setpoint;
- means for initiating continuous pumpout if the suction temperature is less than the initiate setpoint;
- means for determining a terminate setpoint;
- and
- means for comparing the suction temperature to the terminate setpoint and terminating pumpout if the measured temperature is greater than the terminate setpoint.
Dependencies are inferred from the claim text.