Heater control for an air dryer
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United States of America Patent
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Oct 31, 2017
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app pub date -
Sep 25, 2015
filing date -
Sep 25, 2015
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Abstract
An air dryer having a heater element associated with its valves to prevent freezing at cold temperatures. The air dryer includes a temperature sensor and an electronic controller that reads the temperature sensor and inhibits actuation of the valves whenever the temperature of valves is below freezing or a predetermined temperature that indicates a risk for freezing until the valves have been sufficiently warmed by the heater to avoid freezing during operation.
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