EP 1400187 A1 20040324 - Circuit for controlling the temperature of a hair iron
Title (en)
Circuit for controlling the temperature of a hair iron
Title (de)
Schaltung zur Temperaturregelung eines Onduliereisengeräts
Title (fr)
Circuit de contrôle de temperature d'un fer à friser
Publication
Application
Priority
KR 20020028043 U 20020918
Abstract (en)
A temperature control circuit (100) for a hair iron in which an alternating current is applied to the hair iron and the temperature of the hair iron is uniformly maintained, is disclosed. The temperature control circuit comprises a constant voltage portion (20) for rectifying the alternating current and converting the rectified current to a constant voltage; a pulse generating portion (30) for receiving an output from the constant voltage portion (20) and generating a pulse signal for applying zero pulse frequency so as to reduce frequency noise; a temperature control portion (40) for receiving a signal from the pulse generating portion (30) and controlling the temperature of a setting heater; a comparator portion (50) for comparing the output of the constant voltage portion with the resistance of the mat of the setting heater and generating an output during a given time; a heater control portion (60) such as a silicon control rectifier (61) for receiving an output signal from the comparator portion (50) to maintain and preheat the temperature of the mat uniformly; a heating portion (70) for receiving an output signal from the heater control portion (60) to heat up the mat of the setting heater; a heater control display portion (80) for displaying a preheat condition of the mat of the setting heater; and a backward voltage prevention portion (90) for preventing breakdown of devices due to surge or backward voltage of the heater control portion. <IMAGE>
IPC 1-7
IPC 8 full level
A45D 1/04 (2006.01); H05B 1/02 (2006.01); A45D 20/30 (2006.01)
CPC (source: EP KR)
A45D 1/04 (2013.01 - EP); A45D 1/28 (2013.01 - KR); H05B 1/0252 (2013.01 - EP); A45D 20/30 (2013.01 - EP)
Citation (search report)
- [X] EP 0465065 A2 19920108 - VARIAN ASSOCIATES [US]
- [X] EP 0615327 A2 19940914 - WESTINGHOUSE ELECTRIC CORP [US]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
DOCDB simple family (application)
EP 03255842 A 20030917; KR 20020028043 U 20020918