Abstract: An ozone generation device includes an inverter, an ozone generator, and a reactor. The inverter turns on and off a switching element by pulse width modulation (PWM) control to convert DC power into AC power. In the ozone generator, voltage of the AC power is applied to a dielectric electrode, and discharge is generated in raw material gas flowing in a discharge gap between the dielectric electrode and a metal electrode, so that ozone is generated by the discharge. The reactor is connected in series to a dielectric electrode, and reduces an inrush current that flows through the dielectric electrode when the switching element is switched from off to on by the PWM control by the inverter.

Abstract: A hydrogen peroxide water manufacturing device includes an ejector unit including an introduction-side diameter-increasing portion to which water to be treated is introduced, a nozzle portion connected to the introduction-side diameter-increasing portion and having an introduction opening to which a source gas containing oxygen gas is introduced from outside, on a side wall, and a discharge-side diameter-increasing portion that is connected to the nozzle portion and from which the water to be treated mixed with the source gas is discharged, and an electrolysis unit disposed downstream of the ejector unit and including electrolytic electrodes to electrolyze the discharged water to be treated mixed with the source gas and generate hydrogen peroxide by using the source gas as a source.

Abstract: An ozone generation device includes an inverter, an ozone generator, and a reactor. The inverter turns on and off a switching element by pulse width modulation (PWM) control to convert DC power into AC power. In the ozone generator, voltage of the AC power is applied to a dielectric electrode, and discharge is generated in raw material gas flowing in a discharge gap between the dielectric electrode and a metal electrode, so that ozone is generated by the discharge. The reactor is connected in series to a dielectric electrode, and reduces an inrush current that flows through the dielectric electrode when the switching element is switched from off to on by the PWM control by the inverter.

Abstract: An ozone generator includes a metal electrode, a dielectric element, a conductive film, and a power feeding member. The dielectric element has a tubular shape and is spaced from the metal electrode with a discharge gap to which raw gas is supplied. The conductive film is located. on an inner surface of the dielectric element. The power feeding member is electrically connected to the conductive film, and includes a contact member of a mesh form including a plurality of woven metal wires. The contact member contacts with the conductive film.

Abstract: A water treatment system includes: a water treatment device; a feed-water pump that feeds water to be treated to the water treatment device; an ozone generator that generates ozone-containing gas containing ozone gas and oxygen gas; and a direct-current power supply that supplies direct-current power. The water treatment device includes: an ejector including an inlet-side wider-diameter part into which the water is introduced, a nozzle in communication with the inlet-side wider-diameter part and including a sidewall including an inlet opening into which the ozone-containing gas is introduced, and an outlet-side wider-diameter part in communication with the nozzle, from which the water mixed with the ozone-containing gas is ejected; and an electrolyzer located downstream of the ejector and including an electrolysis-purpose electrode supplied with the direct-current power to electrolyze the ejected water mixed with the ozone-containing gas.

Abstract: An ozone generation apparatus includes a cylindrical shaped first electrode, a cylindrical shaped second electrode disposed coaxially with the first electrode and disposed in the first electrode, a dielectric disposed between the first electrode and the second electrode. Dry air is supplied between the first electrode and the second electrode as raw material gas. A discharge gap length d formed by the first electrode, the second electrode, and the dielectric is set to be in a range of 0.3 to 0.5 mm. A pd product, which is a product of the discharge gap length d and a gas pressure p of the raw material gas, is in a range of 6 to 16 kPa·cm. And the discharge gap length d and the gas pressure p of the raw material gas are set to satisfy following expression.

Abstract: An ozone generator includes a container, a first metal electrode, a dielectric electrode, a heat pipe, a heat sink, and a power supply unit. The first metal electrode is a cylindrical electrode the axial direction of which is a first direction, and disposed in the container. A cooling medium is supplied to an outer peripheral surface thereof. The dielectric electrode is a cylindrical electrode that is disposed to be opposed to an inner peripheral surface of the first metal electrode, and is coaxial with the first metal electrode. The heat pipe is disposed to be opposed to an inner peripheral surface of the dielectric electrode, and has electrical conductivity. The heat sink is disposed on the outside as an outer space of a space between the first metal electrode and the heat pipe, and connected to the heat pipe.

Abstract: A water treatment apparatus includes: a reaction vessel that contains water to be treated, including an upper part from which the water to be treated is introduced and a lower part from which the water to be treated is discharged, to form a downward flow; an ozone supply unit that supplies ozonized gas into the reaction vessel from the lower part to form an upward flow of the ozonized gas containing ozone gas and oxygen; and an electrolysis electrode pair disposed on the upper part of the reaction vessel, the pair that produces hydrogen peroxide from the water to be treated and the oxygen gas contained in the ozonized gas by electrolysis.

Abstract: An ozone generator includes a first end plate, a second end plate located opposite the first end plate, a metallic electrode held at both ends by the first and second end plates, a dielectric located inside the metallic electrode with a discharge gap, and including an open end on a first end plate side and a closed end on a second end plate side, a conductive film located on an inner surface of the dielectric, and a high voltage feeding terminal electrically coupled to the conductive film. The conductive film and the high voltage feeding terminal are at least partially in a same position as the first end plate in axial direction of the dielectric. An end of the conductive film and an end of the high voltage feeding terminal on a dielectric opening side extend further toward the opening of the dielectric than the first end plate in the axial direction.

Abstract: According to an embodiment, an extraction device includes an elastic body, first and second pressing units, and a pulling unit. The elastic body includes a first end facing a first direction, a second end, and a contact face facing a second direction intersecting with the first direction. The elastic body can expand in the second direction. The first and second pressing units press the first and second end. The pulling unit pulls the second pressing unit toward the first direction. The contact face comes into contact with an object when the elastic body compressed by pressing forces of the first pressing unit and the second pressing unit expands in the second direction. The pulling unit pulls the object with friction between the object and the contact face when the pulling unit is pulled in the first direction while the contact face of the elastic body is in contact with the object.

Abstract: A cylindrical tank-shaped container including: plural parallel electrode tubes; discharge tubes arranged inside the electrode tubes, each forming a discharge gap; a pair of end plates that penetrate and hold both of end sections of the plural electrode tubes; a cooling space formed by the pair of end plates and the inner surface of the tank-shaped container divided between end plates; a cooling medium inlet and a cooling medium outlet formed in opposite end sides of the cooling space; a raw material gas inlet that introduces raw material gas to be sent to the discharge gaps; and an outlet for ozone gas generated from the raw material gas by silent discharge in the discharge gaps, providing an electrode tube in which a discharge tube is not arranged, among the plural electrode tubes, that have surrounding coolant medium that reaches at least a prescribed temperature resulting from the silent discharge.

Abstract: According to one embodiment, an apparatus for measuring hydroxyl radicals that measures hydroxyl radicals produced by irradiating a liquid to be treated flowing through a channel in which an ultraviolet lamp is arranged with ultraviolet rays, the apparatus includes a diverting unit, a reagent adding unit, and a measuring unit. The diverting unit has a diverting channel that diverts the liquid to be treated before being irradiated with the ultraviolet rays from the channel and part of which is arranged at a position enabling the liquid to be treated within the channel to be irradiated with the ultraviolet rays. The reagent adding unit adds a hydroxyl radical measuring reagent to the diverted liquid to be treated. The measuring unit irradiates the diverted liquid to be treated with the ultraviolet rays and measures the amount of hydroxyl radicals produced based on a change in the hydroxyl radical measuring reagent between before and after the irradiation with the ultraviolet rays.

Abstract: According to one embodiment, an ozone generation device includes a first electrode unit, a second electrode unit, a fuse and a fuse holder. The first electrode unit is provided on an inner face of a discharge tube. The second electrode unit is provided outside the discharge tube at an interval. The second electrode faces the first electrode unit. A diameter of the outer face of the fuse is smaller than a diameter of the inner face. At least a part of the outer face is positioned inside the discharge tube. The fuse holder is interposed between the discharge tube and the fuse, includes the outer periphery and an inner periphery and is provided with a first opening and a second opening. The outer periphery extends in an arc along the inner face to come into contact with the inner face. The inner periphery extends in an arc along the outer face to come into contact with the outer face.

Abstract: A cylindrical tank-shaped container including: plural parallel electrode tubes; discharge tubes arranged inside the electrode tubes, each forming a discharge gap; a pair of end plates that penetrate and hold both of end sections of the plural electrode tubes; a cooling space formed by the pair of end plates and the inner surface of the tank-shaped container divided between end plates; a cooling medium inlet and a cooling medium outlet formed in opposite end sides of the cooling space; a raw material gas inlet that introduces raw material gas to be sent to the discharge gaps; and an outlet for ozone gas generated from the raw material gas by silent discharge in the discharge gaps, providing an electrode tube in which a discharge tube is not arranged, among the plural electrode tubes, that have surrounding coolant medium that reaches at least a prescribed temperature resulting from the silent discharge.

Abstract: An ozone generation apparatus includes a cylindrical shaped first electrode, a cylindrical shaped second electrode disposed coaxially with the first electrode and disposed in the first electrode, a dielectric disposed between the first electrode and the second electrode. Dry air is supplied between the first electrode and the second electrode as raw material gas. A discharge gap length d formed by the first electrode, the second electrode, and the dielectric is set to be in a range of 0.3 to 0.5 mm. A pd product, which is a product of the discharge gap length d and a gas pressure p of the raw material gas, is in a range of 6 to 16 kPa·cm. And the discharge gap length d and the gas pressure p of the raw material gas are set to satisfy following expression. (pd?250d?3.16)2+150d?12.5.

Abstract: An extraction device according to an embodiment, includes an elastic body, first and second pressing units, and a pulling unit. The elastic body includes a first end facing a first direction, a second end positioned opposite from the first end, and a contact face facing a second direction intersecting with the first direction, and can expand in the second direction. The first and second pressing units press the first and second ends. The pulling unit can pull the second pressing unit in the first direction. The contact face comes into contact with an object to be extracted, when the elastic body compressed by pressing force expands in the second direction. When the pulling unit is pulled in the first direction, while the contact face is in contact with the object to be extracted, the object to be extracted is pulled by friction between the object and the contact face.

Abstract: According to one embodiment, an ozone generation device includes a first electrode unit, a second electrode unit, a fuse and a fuse holder. The first electrode unit is provided on an inner face of a discharge tube. The second electrode unit is provided outside the discharge tube at an interval. The second electrode faces the first electrode unit. A diameter of the outer face of the fuse is smaller than a diameter of the inner face. At least a part of the outer face is positioned inside the discharge tube. The fuse holder is interposed between the discharge tube and the fuse, includes the outer periphery and an inner periphery and is provided with a first opening and a second opening. The outer periphery extends in an arc along the inner face to come into contact with the inner face. The inner periphery extends in an arc along the outer face to come into contact with the outer face.

Abstract: An ozone generating apparatus includes a cylindrical high-voltage electrode and a coaxially arranged cylindrical low-voltage electrode. A predetermined high voltage is applied between the high-voltage and low-voltage electrodes via a dielectric substance to cause discharge generating ozone, the discharge gap length being 0.3 to 0.5 mm. One of the low-voltage and high-voltage electrodes is a metal electrode and the other a dielectric electrode. A projection group including plural done shape projections, arranged on same circumference of the metal electrode, is arranged on an inner peripheral surface of the metal electrode to hold the metal electrode coaxial with the dielectric electrode while keeping the discharge gap length. The projection group is arranged at a center portion in a longitudinal direction of the discharging space positioned away from both ends of the discharging space by a predetermined distance L3 satisfying, 0.0?L3/L?0.1, L being length of the discharging space.

Abstract: According to one embodiment, an apparatus for measuring hydroxyl radicals that measures hydroxyl radicals produced by irradiating a liquid to be treated flowing through a channel in which an ultraviolet lamp is arranged with ultraviolet rays, the apparatus includes a diverting unit, a reagent adding unit, and a measuring unit. The diverting unit has a diverting channel that diverts the liquid to be treated before being irradiated with the ultraviolet rays from the channel and part of which is arranged at a position enabling the liquid to be treated within the channel to be irradiated with the ultraviolet rays. The reagent adding unit adds a hydroxyl radical measuring reagent to the diverted liquid to be treated. The measuring unit irradiates the diverted liquid to be treated with the ultraviolet rays and measures the amount of hydroxyl radicals produced based on a change in the hydroxyl radical measuring reagent between before and after the irradiation with the ultraviolet rays.

Abstract: An ozone generating apparatus includes a cylindrical high-voltage electrode and a coaxially arranged cylindrical low-voltage electrode. A predetermined high voltage is applied between the high-voltage and low-voltage electrodes via a dielectric substance to cause discharge generating ozone, the discharge gap length being 0.3 to 0.5 mm. One of the low-voltage and high-voltage electrodes is a metal electrode and the other a dielectric electrode. A projection group including plural done shape projections, arranged on same circumference of the metal electrode, is arranged on an inner peripheral surface of the metal electrode to hold the metal electrode coaxial with the dielectric electrode while keeping the discharge gap length. The projection group is arranged at a center portion in a longitudinal direction of the discharging space positioned away from both ends of the discharging space by a predetermined distance L3 satisfying, 0.0?L3/L?0.1, L being length of the discharging space.