Mitsubishi Denki Kabushiki Kaisha

Toshiba Mitsubishi-electric Industrial Systems Corporation

Mitsubishi Denki K.k.

Akaru Usui

Yujiro Okihara

Youichiro Tabata

Masaki Kuzumoto

Shigenori Yagi

Koji Ohta

Noboru Wada

Hirozoh Kanegae

Yuji Ganryu

Hiromichi Komiya

Hisao Tanaka

Shinji Sato

Hajime Nakatani

Yoshihide Kinbara

Akira Ishimori

Tetsuya Saitsu

Kenkoku Azuma

Norimitsu Esaki

Shigehiro Yoshiyasu

Hiroshi Tsukahara

Takeshi Irino

Kyouko Fukumura

Hirokazu Miyagawa

Isao Kajita

An ozonizer has a flat plate-shaped low voltage electrodea flat plate-shaped high voltage electrodefacing a main surface of the low voltage electrodeThe ozonizer also has a flat plate-shaped dielectricand a spacer for forming a discharge gapof a thin thickness in a laminating direction provided between the low voltage electrodeand the electrodean electrode cooling sheetprovided facing a main surface of the electrodeat a side opposite the discharge gapfor cooling the electrodeThe ozonizer also has a thermal conducting/electric insulating sheetsandwiched between the electrodeand the electrode cooling sheetAn alternating voltage is applied between the low voltage electrodeand the electrodeand a discharge is produced in the discharge gapinjected with oxygen gas to produce ozone gas.

Ozonizer

An ozone generator in which a discharge region may be enlarged without damaging ozone generating performance. In the ozonizer, an alternating current is applied between a first electrode and a second electrode, and a discharge is produced in a gap into which oxygen is injected. In the first electrode, an ozone gas passage for retrieving ozone gas generated in the discharge region is located between an electrode surface facing the discharge region and a side. The ozone gas passages are dispersed in the first electrode. The ozone gas passages collect ozone generated at discharge region locations inside the first electrode.

An ozonizer has a flat plate-shaped low voltage electrode, flat plate-shaped first and second high voltage electrodes facing the low voltage electrode, a first dielectric, and a first spacer, located between the low voltage electrode and the first high voltage electrode, a second dielectric, and a second spacer between the electrode and the second high voltage electrode. The ozonizer also has a first electrode cooling sheet facing the first high voltage electrode at a side opposite a first discharge gap, a second electrode cooling sheet facing the second high voltage electrode, a first thermally conducting and electrically insulating sheet sandwiched between the first high voltage electrode and the first electrode cooling sheet, and a second thermally conducting and electrically insulating sheet sandwiched between the second high voltage electrode and the second electrode cooling sheet.

An ozonizer has a flat plate-shaped low voltage electrode and a flat plate-shaped high voltage electrode facing a main surface of the low voltage electrode. The ozomzer also has a flat plate-shaped dielectric and a spacer forming a discharge gap in a laminating direction, located between the low voltage electrode and the high voltage electrode, a high voltage electrode cooling unit forming a cooling water passage insulated from the high voltage electrode inside the high voltage electrode. An alternating voltage is applied between the low voltage electrode and the high voltage electrode and a discharge is produced in the discharge gap, into which oxygen is injected, to produce ozone gas.

The ozonizer of this present invention is small in size, and capable of generating highly concentrated ozone with a high (generating) efficiency. A low voltage electrode includes a disc-shaped low voltage electrode main body facing a high voltage electrode and an extension at one side of the low voltage electrode main body, and the extensions are laminated in layers on a base via blocks, and a coolant inlet portion for supplying coolant to a coolant passage, a coolant outlet portion for exhausting coolant from the coolant passage, and an ozone gas outlet portion for exhausting ozone gas from the ozone gas passage pass through the extensions and the blocks, respectively, in a laminating direction of the discharge cells.

An ozonizer has a flat plate-shaped low voltage electrode, a flat plate-shaped high voltage electrodefacing a main surface of the low voltage electrode. The ozonizer also has a flat plate-shaped dielectricand a spacer for forming a discharge gapof a thin thickness in a laminating direction provided between the low voltage electrodeand the electrode, an electrode cooling sheetprovided facing a main surface of the electrodeat a side opposite the discharge gapfor cooling the electrode. The ozonizer also has a thermal conducting/electric insulating sheetsandwiched between the electrodeand the electrode cooling sheet. An alternating voltage is applied between the low voltage electrodeand the electrodeand a discharge is produced in the discharge gapinjected with oxygen gas to produce ozone gas.

A scraping apparatus in which a scraping process is performed on a surface of a work to be machined to form recesses thereon by converging a laser beam outputted from a laser oscillator by a converging lens and irradiating the converged laser beam onto the work relatively moving to the laser beam for removing some portions by being melted or evaporated from the surface thereof.

Scraping method

A sub-mount, an LD bar and a light guide duct are mounted on an LD package main body of a semiconductor laser, and an outgoing section of the LD bar is inserted into the light guide duct. A gold metallized insulating plate is fused on one side of the LD package main body, and the LD bar and the gold metallizing are wire-bonded. The light guide duct transmits the excitation light directly up to a laser medium, and a reflector surrounds the periphery of the laser medium. Upon flowing of a current from the LD package main body to the cathode electrode, the LD excitation light is emitted and the laser medium is excited, to thereby make laser oscillation possible. With the above structure, there is provided an LD excitation solid-state laser device which is easy in assembling, low in the costs, high in efficiency and high in reliability.

Semiconductor laser-excitation solid-state laser device

A semiconductor excitation solid-state laser apparatus, in which a cross-sectional area of an optical guide plate leading an excited beam emitted from a semiconductor laser element to a solid-state laser medium is made larger in the side of the semiconductor laser element thereof, while a cross-sectional area thereof is made smaller in the side of the solid-state laser medium.

Semiconductor excitation solid-state laser apparatus

The laser machining apparatus according to the present invention holds a plate-formed work W giving tension thereto, and comprises a driver base/a work base driving the work in the axial direction, a converging lens for a laser beam L, a laser machining head moving in a direction in which the laser beam L is focused onto the work, an upper work holding member having a nozzle for laser beam irradiation integrated thereto, a bellows for relatively and displaceably connecting the laser machining head and the upper work holding member in the focusing direction, and a lower fixed base/a highly slippery plate located and fixed at a position corresponding to a center of the nozzle, and the work is held between the upper work holding member and the lower fixed base/a highly slippery plate at a position adjacent to the laser beam machining position.

Laser beam machining apparatus, focus positioning device for laser beam

A laser beam machine comprises an optical fiber cable for transmitting laser light, a beam output optical assembly for converging and emitting a laser beam and flexible protective conduits arranged along the X- and Y-axes accommodating the optical fiber cable as well as power and control cables for X-and Z-axis drive motors and an assist gas tube. While the beam output optical assembly can be moved along the X-, Y- and Z-axes, the flexible protective conduits do not bend in excess of the permissible bending radius of the optical fiber cable. The laser beam machine thus constructed provides improved reliability, safety and maintainability of the optical fiber cable as well as high laser beam converging performance and an enlarged machining area. In another embodiment a nozzle centering device is provided between an optical fiber cable and a nozzle housing holding a collimator lens and a condensor lens to align the optical axis of the optical fiber cable with the nozzle housing.

Laser beam machine with an optical fiber cable

A laser machining apparatus having a laser oscillator connected to a laser robot by a beam transmitting apparatus made of beam ducts, in which the beam ducts are hermetically sealed between the outlet of the laser oscillator and the laser beam outlet of laser robot, and a working gas supplying inlet is mounted at an upper portion of the beam ducts for transmitting of the gas through the beam ducts and outputting of the gas at a nozzle in the laser robot head. According to the above construction, the present invention is able to prevent an occurrence of the heat lens phenomenon, and also able to prevent fumes and dust from entering into the beam duct.

Laser machining apparatus for welding and cutting

An insulating coating of a desired portion of an electric cable is removed by selectively irradiating the desired portion with a pulse laser beam having a pulse width of 5.mu. sec or less and a peak output of 1 MW or more.

Method for removing insulating coating of electric cable and apparatus

An intermittent ozonizing apparatus comprises an ozonizer for producing ozonized oxygen from an oxygen source, an adsorption-desorption tower which adsorbs ozone from the ozonized oxygen fed from the ozonizer to store the ozone, the ozone being desorbed by suction under a reduced pressure, a recycling passage for returning oxygen to the ozonizer after the ozone is adsorbed in the adsorption-desorption tower, and a blower connected in the recycling passage whereby oxygen gas containing ozone is recycled to the ozonizer during ozone adsorption and the ozone stored in the adsorption-desorption tower is desorbed by suction under a reduced pressure during ozone desorption to feed to an ozone outlet.

Growing community of inventors

Tokyo, Japan

Akaru Usui