Heater unit humidification chamber monitor
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United States of America Patent
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Aug 20, 2013
Grant Date -
Oct 4, 2012
app pub date -
Mar 29, 2011
filing date -
Mar 29, 2011
priority date (Note) -
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Abstract
A heater unit is adapted to determine if a humidification chamber thermally coupled to a hot plate of the heater unit is effectively dry based on determining a thermal response of a hot plate of the heater unit. Also, the activation period during which the hot plate is being heated is adjusted toward an optimum period by adjusting the energization or power level to the heater element thereof in relation to the duration of a prior activation period. Further, the air flow rate of gas through the humidification chamber may be estimated based on a temperature of the hot plate determined in predetermined relationship to the beginning of an activation period.
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