In one embodiment, a device for generating broad spectrum ultraviolet radiation is provided. The device includes an adjustable spark gap of metallic solids, the spark gap including: a first electrode coupled to a first heatsink, and a second electrode coupled to a second heatsink, the second electrode spaced apart and opposite from the first electrode. The device includes a variable capacitor configured to discharge a voltage through the spark gap to generate broad spectrum ultraviolet radiation. The device includes a voltage source. The device includes a controller configured to control the variable capacitor. The first electrode is formed from a first metallic solid and the second electrode is formed from a second metallic solid, and the ultraviolet radiation generated is in the 140 nm to 400 nm range.

Disclosed is a static eliminator having an offset voltage reducing structure capable of improving antistatic performance for a charged body by reducing an ion offset voltage. The present static eliminator comprises a static eliminator body having an air passage through which high-pressure air is supplied, a plurality of discharge structures installed at the lower end of the static eliminator body to supply the high-pressure air passing through the air passage, and generating positive/negative ions by discharging using the applied high voltage, and an offset voltage reduction unit having a plurality of openings formed to allow the positive/negative ions and high-pressure air to pass therethrough, and installed to cover at least some of the plurality of discharge structures.

Disclosed is a static eliminator having an offset voltage reducing structure capable of improving antistatic performance for a charged body by reducing an ion offset voltage. The present static eliminator comprises a static eliminator body having an air passage through which high-pressure air is supplied, a plurality of discharge structures installed at the lower end of the static eliminator body to supply the high-pressure air passing through the air passage, and generating positive/negative ions by discharging using the applied high voltage, and an offset voltage reduction unit having a plurality of openings formed to allow the positive/negative ions and high-pressure air to pass therethrough, and installed to cover at least some of the plurality of discharge structures.

The object of the present invention is to suitably control a charging state of a human body all the time. A charging amount detection device 13 is worn by a human body and measures the surface potential of the human body. A static electricity control device 12 is worn by a human body and generates and discharges ions to the human body and thereby controls the static electricity on the human body. A mobile terminal 11 sets a control pattern of the static electricity on the human body that is suitable for a condition such as temperature and humidity for the static electricity control device 12 via short-range wireless communication. The static electricity control device 12 uses the set control pattern to perform feedback control of the static electricity on the human body by using the surface potential of the human body measured by the charging amount detection device 13.

The object of the present invention is to suitably control a charging state of a human body all the time. A charging amount detection device 13 is worn by a human body and measures the surface potential of the human body. A static electricity control device 12 is worn by a human body and generates and discharges ions to the human body and thereby controls the static electricity on the human body. A mobile terminal 11 sets a control pattern of the static electricity on the human body that is suitable for a condition such as temperature and humidity for the static electricity control device 12 via short-range wireless communication. The static electricity control device 12 uses the set control pattern to perform feedback control of the static electricity on the human body by using the surface potential of the human body measured by the charging amount detection device 13.

An electronic device of the present invention is an electronic device used around a neutralization target object, the electronic device includes: an electric part; an interconnection portion that transmits electric power of a high voltage power supply to the electric part; and a housing that accommodates the electric part and the interconnection portion, in which the electronic device includes at least one of a cover portion, which covers at least a part of the electric part and has a surface resistivity of equal to or higher than 10.sup.4 Ω/□ and equal to or lower than 10.sup.11 Ω/□, and the housing, which has a surface resistivity of equal to or higher than 10.sup.4 Ω/□ and equal to or lower than 10.sup.11 Ω/□.

An electronic device of the present invention is an electronic device used around a neutralization target object, the electronic device includes: an electric part; an interconnection portion that transmits electric power of a high voltage power supply to the electric part; and a housing that accommodates the electric part and the interconnection portion, in which the electronic device includes at least one of a cover portion, which covers at least a part of the electric part and has a surface resistivity of equal to or higher than 10.sup.4 Ω/□ and equal to or lower than 10.sup.11 Ω/□, and the housing, which has a surface resistivity of equal to or higher than 10.sup.4 Ω/□ and equal to or lower than 10.sup.11 Ω/□.

A bipolar ionizer comprising an electronic circuit, microprocessor, and step-up transformer providing high-voltage signals to carbon-fiber electrodes producing bipolar ion concentrations greater than +/−200 million ions per cubic centimeter. The bipolar ionizer monitors, reduces, and converts high-voltage signals to feedback signals used by the microprocessor to vary a frequency and a duty cycle of a digital signal to control an excitation signal for a step-up transformer output voltage to consistently maintain an unbalanced high-voltage output ratio less than 80 percent, balanced bipolar ion concentration ratio greater than 80 percent, and zero ozone concentration over a range of electrical signal inputs. The microprocessor calculates and reports bipolar ionizer concentrations based on feedback signals. The microprocessor monitors concentrations of Volatile Organic Compounds (VOCs) in an airflow serving the bipolar ionizer and adjusts the positive/negative DC high-voltage signals and bipolar ion concentration when VOC concentrations are above a threshold.

A method of generating a non-thermal microplasma, including the steps of providing a fibrous air-filter, arranging one or more pairs of elongated, adjacent, substantially parallel spaced-apart electrodes on the fibrous air-filter, wherein a discharge gap is defined between each pair; placing a component in signal communication with the electrodes for applying a voltage between each pair; and generating a non-thermal microplasma in a corresponding discharge gap and thereby removing one or more combustion byproducts from ambient air.

The present invention relates to a molten metal plated steel sheet manufacturing method for cooling a molten galvanized layer with high efficiency when manufacturing a molten galvanized steel sheet, and the purpose of the present invention is to provide a method for manufacturing a molten galvanized plating, wherein a molten galvanized steel sheet having an aesthetically pleasing surface without fitting defects, drop mark defects, and linear comb-pattern defects can be stably obtained by cooling a galvanized layer with high efficiency during a molten metal plated steel sheet manufacturing process. This method for manufacturing a molten galvanized steel sheet having excellent surface properties is characterized by comprising the steps in which a molten galvanized layer is formed on the surface of a steel sheet while the steel sheet passes through a galvanizing pot, the thickness of the galvanized layer formed on the surface of the steel sheet is adjusted while the steel sheet passes through a gas wiping device, the steel sheet that has had the thickness of the galvanized layer adjusted undergoes a primary cooling while passing through a bottom cooler, and the galvanized steel sheet that has undergone the primary cooling undergoes a secondary cooling while passing through a cooling chamber, wherein: the primary cooling is performed with cooling air blown from the bottom cooler until right before a galvanizing solution of the galvanized layer attached to the surface of the steel sheet becomes solidified, the amount of air blown being adjusted according to the temperature of the galvanized layer attached to the surface of the steel sheet; and the secondary cooling is performed with ionic air generated from an ionic air generator provided in the cooling chamber and a spray solution sprayed from a solution atomization part, the secondary cooling being performed from the start of the solidification of the galvanizing solution until the end of the solidification, and the cooling chamber cooling the galvanized steel sheet while moving up and down according to the temperature of the galvanized layer attached to the surface of the galvanized steel sheet.