Canon Kabushiki Kaisha

Hitachi Industrial Equipment Systems Co., Ltd.

Honda Motor Co., Ltd.

Ricoh Company, Ltd.

Hitachi, Ltd.

Roland Corporation

Honda Giken Kogyo Kabushiki Kaisha

Piolax, Inc.

Nkk Corporation

Other

Sony Corporation

Hitachi Koki Co., Ltd.

Clarion Co

Ts Tech Co., Ltd.

Tokyo Gas Company Limited

Kenji Morita

Shigeyuki Yorikane

Masahiko Takano

Nobuyuki Satoh

Daisaku Horikawa

Akiko Kanno

Shigemichi Hamano

Satoshi Seki

Kotaro Chiba

Mamoru Yorimoto

Masaya Kawarada

Nobuo Sekiguchi

Suguru Yokozawa

Yoshitaka Takeuchi

Yuichi Sakurada

Yuta Nakano

Ryo Takasaki

Tomohiro Sasa

Akihiro Katayama

Hiroki Yonezawa

Kiyohide Satoh

Shinji Uchiyama

Daisuke Kotake

Tomoaki Kawai

Yushi Oka

Hidenori Sunada

Akihiko Sato

Kazuhiro Miyasa

Hideaki Sasaki

Shinichi Takata

Takeshi Tsuchiya

Shinichi Kazui

Masahiro Serizawa

Toru Ono

Asahiro Nakayoshi

Akira Morisawa

Tomohiko Shimoyama

Hitoshi Kato

Masahiro Suzuki

Hiroshi Matsumoto

Yuichi Yamamoto

Masato Kobayashi

Takaaki Endo

Katsuyuki Yamazaki

Hideharu Tanaka

Kazuki Takemoto

Shinya Matsumoto

Yoshiaki Mori

Yasuhiro Okuno

Toshihiko Fukasawa

Hidehiko Kinoshita

Taichi Matsui

Hiroya Miura

Daisuke Furukawa

Jun Hariu

Satoru Nojima

Shota Suzuki

Hiroaki Sato

Susumu Saito

Yoshiaki Tsukada

Akira Arimoto

Takashi Nakajima

Toshiyuki Miyake

Yoshio Iizuka

Takashi Yokoya

Satoru Yamamoto

Akinobu Nishikata

Masakazu Fujiki

Toshihiro Kobayashi

Masaaki Yamashita

Ryo Ishikawa

Toshikazu Ohshima

Riki Fukuhara

Hideyuki Ikegami

Koji Yumoto

Akira Matsuzaki

Koji Suzuki

Akihiko Sakai

Hiroshi Okazaki

Takahiro Kurosawa

Yasufumi Takama

Hideo Noro

Takashi Aso

Katsuya Nakama

Akihiro Kawakita

Naoki Inoue

Yuzuru Ishikawa

Shinichi Aratani

Kuninori Imai

Hiroyoshi Suenaga

Naohito Nakamura

Kenichiro Tanaka

Gen Tanabe

Yoji Kanaoka

Masaaki Itagaki

Shuichi Yagi

Akira Hashimoto

Koji Mizuta

Atsushi Chaki

Takeji Shiokawa

An oil-feed-type air compressor includes a compressor main body driven by an electric motor, a separator that separates the oil from compressed air delivered from the compressor main body, an oil supply system that supplies the oil separated by the separator to working chambers of the compressor main body, an oil cooler that is disposed in the oil supply system and cools the oil by using cooling air generated by a cooling fan, and a controller. The controller stops the electric motor and the cooling fan when the continuation time of no-load operation has reached a predetermined value. Further, the controller predicts the return timing at which the electric motor is restarted, on the basis of a sensing history of the delivery-side pressure sensor, and predicts the delivery-side temperature of the compressor main body at the return timing.

Liquid-feed-type gas compressor

A gas compressor inhibits a supply delay of a compressed gas at a time of a return from no-load operation to load operation, and also reduces the consumed motive power. A controller switches between load operation and no-load operation by controlling a suction throttle valve according to a sensed delivery-side pressure, and also controls a rotation speed of an electric motor that drives the compressor. The controller is configured to compute a capacity C of an air supply system that supplies a compressed air generated by the air compressor to a use location of the compressed gas on a basis of load operation duration t1 and no-load operation duration t2, and set a target rotation speed of the electric motor at a time of no-load operation on a basis of the capacity C of the air supply system.

Gas compressor

A simpler notification is given about identifying causes of abnormalities and indicating dealing methods or countermeasures to deal with the causes of abnormalities. In a gas compressor including: a compressor body that compresses a gas; a drive source that drives the compressor body; at least one physical sensor that is disposed on at least one of a compressed-gas pipe or an electric system and detects a physical quantity in driving of the compressor body; a display unit; and a controller that processes the detected result from the physical sensor and causes the display unit to display information according to the processing, the controller stores in advance the associated relation between a preset range with respect to a rate of change of the physical quantity and information about at least one of a cause of a change in the physical quantity and a dealing method of dealing the cause, calculates a rate of change of the physical quantity on the basis of the detected result from the physical sensor, and causes the display unit to display information about at least one of the cause corresponding to the preset range and the dealing method of dealing with the cause when the calculated rate of change of the physical quantity is determined as falling in the preset range.

A screw compressor has first and second screw rotors that suck, compress, and deliver a working medium; a first bearing supporting one end of the first screw rotor coupled to a rotating shaft of a power source; a casing housing the first screw rotor and first bearing; a shaft-sealing member located on an opposite side of a tooth profiler for the first screw rotor relative to the first bearing and seals a through hole in the casing, through which a shaft of the first screw rotor coupled to the output shaft of the power source is inserted; a partition wall isolating the first bearing from the shaft-sealing member; and a liquid-supply route that is provided in the casing and has a first liquid supply opening for supplying a lubricating liquid to the shaft-sealing member and a second liquid supply opening for supplying the lubricating liquid to the first bearing.

Screw compressor

This electronic musical instrument main body device comprises an information acquisition unit and a port assignment unit. The information acquisition unit acquires, from a playing operation device connected to one connection terminal, information related to the playing operation device. The port assignment unit assigns, to the playing operation device, a virtual input port of a type corresponding to the information related to the playing operation device and acquired by the information acquisition unit.

Sound source device for electronic musical instrument, musical sound generating method and electronic musical instrument system

A screw compressor for compressing a working medium sucked through a suction opening and discharging the compressed working medium through a delivery opening, wherein the screw compressor includes: a male rotor and a female rotor that rotate while meshing with each other; a casing that houses the male rotor and the female rotor and is provided with a bore which forms a working chamber designed, together with the male rotor and the female rotor, to compress the working medium; a drive unit that rotationally drives at least one of the male rotor and the female rotor; a working chamber closing unit that forms a suction port for sucking the working medium into the working chamber and closes the working chamber when the working chamber reaches a specified capacity; and a suction space that connects the suction opening and the suction port to allow communication therebetween.

Screw compressor having working chamber closing member to regulate suction working medium flow to a working chamber

Provided is a liquid supply mechanism including: a plurality of liquid supply sections each including a plurality of branch paths whose central axes intersect with each other, and a supply path having a side surface to which the plurality of branch paths of the plurality of liquid supply sections are directly connected, respectively, and supplying liquid, which is supplied from an upstream, to the branch paths.

Screw compressor having a plurality of branch paths with intersects and central axes

A casing of a screw compressor has a delivery inner wall face facing delivery end faces of a male rotor and a female rotor. The delivery inner wall face of the casing has a shield area that shields at least a part of a track of an axial fluid communication path, which is a clearance that periodically occurs at the delivery end faces according to variation of intermeshing of the male and female rotors upon rotation thereof and is bounded by trailing flanks of the male and female rotors. The shield area of the casing is provided with a groove group made up of a plurality of grooves having longitudinal directions. The grooves of the groove group are juxtaposed in the circumferential direction of at least one rotor of the male and female rotors and are arranged such that their sides extending in the longitudinal directions are disposed adjacent to each other. Each groove of the groove group is configured such that its longitudinal direction oriented from the inner circumferential side of the one rotor toward the outer circumferential side is inclined with respect to the radial direction of the one rotor in the same direction as the rotational direction of the one rotor.

An oil feed type air compressor includes a compressor main body, a separator that separates the oil from the compressed air delivered from the compressor main body, and an oil feed system that supplies the oil to the working chambers and bearings of the compressor main body. The oil feed system includes an oil cooler that includes a cooling unit and a cooling unit connected on a downstream side of the cooling unit, an oil feed pipe that is connected to an outlet between the cooling unit and the cooling unit and that supplies the oil cooled by the cooling unit to the bearings of the compressor main body, and an oil feed pipe that is connected to an outlet on a downstream side of the cooling unit and that supplies the oil cooled by the cooling units to the working chambers of the compressor main body.

Liquid feed type gas compressor having a liquid supply system with first and second cooling units

A liquid-supply-type screw compressor can suppress a rise in temperature of a liquid while reducing work for stirring the liquid. The compressor has male and female rotors, male- and female-rotor-side working chambers formed at grooves of the male and female rotors, respectively. The compressor also has a liquid supply nozzle arranged on one side in the rotor axial direction which is a low-pressure side of an intersection at which a high-pressure-side cusp intersects a ridge line of a trailing lobe tip of the female rotor that defines a female-rotor-side working chamber, the nozzle supplying liquid to the male-rotor-side working chamber; and a liquid-supply nozzle arranged on the other side in the rotor axial direction which is a high-pressure side of the intersection, and supplies the liquid to the male-rotor-side working chamber, and the liquid supply amount of the nozzle is made greater than the amount of the other liquid-supply nozzle.

Liquid supply type screw compressor

A gas compressor includes a compressor main body, an electric motor that supplies driving force to the compressor main body, a power conversion device, a plurality of air release valves disposed in a plurality of air release systems communicating with a discharge piping system to discharge the compressed gas to an atmospheric pressure environment, and a controller. The gas compressor performing an unload operation of reducing, when a discharge pressure reaches a predetermined pressure, a load on the compressor main body by opening one of the air release valves. The gas compressor including the plurality air release systems for each of which the air release value is disposed, and a plurality of pressure regulating valves provided on a downstream side of each air release valve, respectively, wherein the controller selects one of the air release valves and performs the unload operation.

Gas compressor with a plurality of air realease systems each having an air release valve and an air regulating valve

Provided is an oil feed type air compressor which can increase the determination accuracy regarding a deterioration state of oil. An oil feed type air compressorincludes a compressor main body, a separatorthat separates oil from compressed air discharged from the compressor main body, and an oil feeding systemthat feeds the oil separated by the separatorinto a compression chamber of the compressor main body. The oil feeding systemincludes a temperature control valvethat adjusts a diversion ratio for an oil coolerand a diversion ratio for a bypass pipeaccording to a temperature of the oil. The oil feed type air compressorincludes pressure sensorsA andB located in the oil feeding system, a discharge temperature sensorlocated on the discharge side of the compressor main body, and a controllerthat computes, when it is estimated that the diversion ratio for the oil cooleris 100% from the temperature sensed by the discharge temperature sensorexceeding a predetermined value Td, a difference ΔP between the pressure sensed by the pressure sensorA and the pressure sensed by the pressure sensorB and determines a deterioration state of the oil in reference to the difference ΔP.

Oil feed type air compressor

A position information antennareceives a position signal including position information about a sending source (satellite, base station, or the like) of a positioning radio wave. A communication antennatransmits position information about a compressor(air compressor) that compresses the air and receives meteorological information corresponding to the position of the compressorfrom a server on a cloud. A controllerspecifies the position of the compressorfrom the position signal received by the position information antennaand controls the compressoron the basis of the meteorological information corresponding to the position of the compressorreceived by the communication antenna

Air compressor

A compressor body includes a compression mechanism including a screw rotor that compresses gas, a casing that accommodates the compression mechanism and defines a compression working chambers therein, a suction side bearing that rotatably supports the screw rotor, a bearing chamber that accommodates the suction side bearing, and a liquid supply port that communicates with the compression working chambers and supplies liquid supplied from the outside of the casing into the compression working chambers. The casing has an internal liquid supply flow path that extends from a discharge side of the compression working chambers as an upstream side to a suction side of the compression working chambers as a downstream side and that supplies the liquid to the liquid supply port. The internal liquid supply flow path has a downstream portion reaching the bearing chamber and supplies the liquid to the suction side bearing.

Compressor body and compressor to supply liquid into working chambers and whose downstream portion reaches a suction bearing chamber

A delivery port of a rotary-screw compressor includes a first opening having a profile configured to interrupt communication with a second working chamber of a suction process that opens only in the axial direction; a second opening connected to the first opening; and a third opening connected to the first and second openings. The profile of the first opening includes a first profile line that forms one of a pair of lateral edges of a lingulate protrusion; a second profile line that forms another one of the pair of the lateral edges of the protrusion; a third profile line that extends toward the reference point along the root circle of the female rotor; and a second connection line that connects the first and second profile lines. The second opening opens into the first opening at the second connection line. The third opening opens into the first groove.

Liquid-feeding rotary-screw compressor

Growing community of inventors

Yokohama, Japan

Kenji Morita