LOAD-DEPENDENT POWER CONTROL FOR HAIR IRON HAVING CERAMIC HEATERS
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United States of America Patent
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Issued Date -
Jun 22, 2023
app pub date -
Nov 30, 2022
filing date -
Dec 22, 2021
priority date (Note) -
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status (Latency Note)
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Abstract
Methods and apparatus include a hair iron having a controller and a heater between first and second arms movable relative to each other between open and closed positions. The controller connects or not the heater to a line voltage to heat hair when placed between the arms during use. A proportional-integral-derivative (PID) controller communicates with a thermistor measuring a current temperature of the heater and makes requests of the controller to operate the heater at a setpoint temperature. In various embodiments, the heater heats to full power during warm-up and operates thereafter at lower temperatures based on a reading of the line voltage and a time to adjust the current temperature to the desired setpoint temperature.
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Family
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