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Detection of Current Signal and Thermal Characteristics of Electric Fan Operated in Various Situations

선풍기의 운전 상황별 발열특성 및 전류신호 검출

  • Kim, Doo-Hyun (Department of Safety Engineering, Chungbuk National University) ;
  • Lee, Heung-Su (Fire Insurers Laboratories of Korea, Korean Fire Protection Association)
  • 김두현 (충북대학교 안전공학과) ;
  • 이흥수 (한국화재보험협회 방재시험연구원)
  • Received : 2014.01.07
  • Accepted : 2014.06.05
  • Published : 2014.06.30

Abstract

Cooling equipment is the frequent occurrence of fire despite the absence of the heating element. National fire statistics in 2013 show that a total of 263 fires occurred in the cooling equipment and the number of electric fan has 145 fire cases. This is accounted for 55.1% of the whole. Electric fan is the electrical appliance that the heat is generated on the winding wire and the iron core. If such characteristic is not controled properly, fire would break out at the electric fan. also there is a gap filled with an insulator between connection terminals of the capacitor in the electric fan. But in case that the gap on the capacitor is covered with some conductive material such as dust, there would be a fire as well caused by electrical heating locally. Although many studies related with those have been conducted, electric fan fire is continuously occurred. In this study, thermal characteristics and current signal in various conditions such as the heat generation of windings including iron cores of the motor and the dielectric breakdown of terminals on the capacitor connected to the motor were detected. In order to measure the maximum temperature, "third level" wind velocity button was pushed and the time selection switch to "continuation" was set. Analyzed data would be available for the fire safety of the electric fan.

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