Blockage detection system and blockage detection method
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United States of America Patent
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Jun 9, 2020
Grant Date -
Jan 18, 2018
app pub date -
Jul 13, 2017
filing date -
Jul 13, 2016
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Abstract
A blockage determination portion 174 of a blockage detection system 30 determines that no blockage has occurred in a purge line 90, if a flow rate V of an inner fluid Fi exceeds a flow rate threshold THv while an internal pressure Pi of the purge line 90 is reduced from a first pressure value P1 to a second pressure value P2, for example. The blockage determination portion 174 determines that a blockage has occurred in the purge line 90, if the flow rate V of the inner fluid Fi falls below the flow rate threshold THv after the internal pressure Pi is reduced from the first pressure value P1 to the second pressure value P2.
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