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A kerosene heater, also known as a paraffin heater, is a portable, unvented, kerosene-fueled, space-heating device. In the United States they are used mainly for supplemental heat or as a source of emergency heat during a power outage.〔http://indoorkeroseneheater.org/ 〕 In some countries, particularly in Japan, they are used as the primary source of home heat. Most kerosene heaters produce between 3.3 and 6.8 kW (11000 to 23000 BTU per hour). ==Operation== A kerosene heater operates much like a large kerosene lamp. A circular wick made from fiberglass or cotton is integrated into a burner unit mounted above a font (tank) filled with 1-K kerosene. The wick draws kerosene from the tank via capillary action. Once lit, the wick emits flames into the burner unit which heats air via convection or nearby objects via radiation. The burner is designed to properly oxygenate and distribute the flames. The flame height is controlled by raising or lowering the exposed wick height inside the burner unit via an adjusting mechanism. The kerosene heater is extinguished by fully retracting the wick into a cavity below the burner, which will snuff out the flame. Efficiency is approx. 99%. There has been a technological advance in kerosene heaters: some now use electricity to power a fan to force the heated air out, making it possible to heat up rooms faster. There is also thermostat controlled operation installed in modern kerosene heaters as well. However, most kerosene heaters require no electricity to operate. Most heaters contain a battery-operated or piezo-electric ignitor to light the heater without the need for matches. If the ignitor should fail the heater can still be started manually. The Japanese non-vented "fan" heater burns Kerosene gas and is known as a gasification type heater. The liquid Kerosene fuel is pre-heated via an electric heating element to vaporize the fuel. The resulting gas is collected and forced into the burn chamber where it is ignited and burns with a blue flame, similar to Propane. Output can be varied from 2500 Btu - max. The unit is fueled through a conventional side mount cartridge style tank just like other non-vented wick type radiant heaters. Efficiency is approx. 99%. The other type of Japanese Kerosene heaters are the vented type with intake and exhaust piped through a dual pipe "chimney" through a side wall of a house. These units burn roughly like the old 1950's "pot" burners, but with fuel injection and computer control. Efficiency is approx. 87% - 89%. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Kerosene heater」の詳細全文を読む スポンサード リンク
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