POWER CONTROL FOR HAIR IRON HAVING CERAMIC HEATERS
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United States of America Patent
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Issued Date -
Apr 6, 2023
app pub date -
Oct 6, 2021
filing date -
Oct 6, 2021
priority date (Note) -
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status (Latency Note)
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Abstract
A hair iron includes two longitudinally extending arms each having a ceramic heater. Users place hair between the heaters during use. A controller coordinates heating conditions of the heaters. If a line voltage supplied to the hair iron is a high voltage, the controller is configured to alternate heating between the heaters whereby only heating of one heater occurs at one time. To reduce flicker and harmonics, the controller supplies heating current so that one heater remains off for consecutive half-cycles of alternating current while the other heater is powered on variously. The controller then switches the heating. The hair iron further includes a line voltage detector to detect whether a line voltage supplied through a cord to the hair iron is either low voltage or high voltage. During such time, the controller limits heating power to the two heaters.
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Family
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