Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

Nippondenso Co., Ltd.

Kabushiki Kaisha Toyota Jidoshokki

Denso Corporation

Toyota Jidosha Kabushiki Kaisha

Idemitsu Kosan Company, Limited

Kabushiki Kaisha Tiyoda Jidoshokki

Eagle Industry Co., Ltd.

Tetsuhiko Fukanuma

Masahiro Kawaguchi

Tetsuo Yoshida

Shinya Yamamoto

Yasushi Watanabe

Ken Suitou

Masanori Sonobe

Masakazu Murase

Kunifumi Goto

Hiroshi Kubo

Yuji Izumi

Hiroaki Kayukawa

Masaki Ota

Takashi Ban

Kazuhiro Kuroki

Ryo Matsubara

Kazuya Kimura

Takayuki Kato

Tatsushi Mori

Masao Iguchi

Shigeru Hisanaga

Kiyohiro Yamada

Yuichi Tsumagari

Shigeki Iwanami

Takuya Okuno

Izuru Shimizu

Tetsuya Yamaguchi

Osamu Hiramatsu

Hiroyuki Nagai

Hajime Kurita

Eiji Tokunaga

Yuuji Yamamoto

Kenji Takenaka

Shinichi Suzuki

Atsuyuki Morishita

Tsuyoshi Takemoto

Shintaro Miura

Hiroshi Uneyama

Hirotaka Egami

Tatsuya Koide

Takayuki Imai

Minoru Mera

Hisao Kobayashi

Norio Uemura

Tomohiko Yokono

Ichiro Hirata

Kazuhito Miyagawa

Suguru Hirota

Kouji Watanabe

Yoshitami Kondo

Masato Kaneko

Naoya Yokomachi

Yusuke Kinoshita

Takahiro Moroi

Yasuharu Odachi

Manabu Sugiura

Takahiro Sugioka

Kazuaki Iwama

Hideki Mizutani

Hiroyuki Nakaima

Shigeyuki Hidaka

Masakazu Hashimoto

Takeshi Sakai

Shingo Enami

Kazushige Murao

Fuminobu Enokijima

Michiyasu Nosaka

Seiji Katayama

Takeshi Yamada

Takeshi Kondo

Masahiko Okada

Yasushi Suzuki

Masaru Hamasaki

Yoshihiro Makino

Sokichi Hibino

Yasushi Kato

Masafumi Nakashima

Yoshio Kimoto

Yuji Kaneshige

Tomohiro Murakami

Yasuhiro Oki

Katsuya Ohyama

Naoki Koeda

Eiichi Nagasaku

Yumin Hishinuma

Muneharu Murase

Satoshi Koumura

Shingo Kumazawa

So Nakajima

Mutsumi Yoshino

Kenji Mochizuki

Yoshinobu Ishigaki

Hirohiko Tanaka

Shinsuke Asou

Atsushi Shibata

Ai Saeki

Kazuaki Nagayoshi

Osamu Nakayama

Yuji Nakane

The lubricating oil composition for a refrigerator of the present invention is used with a refrigerant containing carbon dioxide, and contains a base oil (A) containing a polyoxyalkylene glycol as a major component, and an alcohol (B) having at least one hydroxy group, in which a total number of the hydroxy group and an ether bond is from 2 to 3 (provided that the number of an ether bond may be 0).

Lubricating oil composition for refrigerator, composition for refrigerator, lubricating method, and refrigerator

An oil separation member has a partition member that partitions between a discharge chamber and a discharge passage. A circular ring portion is provided in the partition member in a manner extending toward the discharge passage. An introduction hole that communicates the discharge chamber and the discharge passage with each other is formed in the circular ring portion. The introduction hole extends in a tangential direction to the circular ring portion.

Compressor having oil separator

An electric compressor is installed in a vehicle and includes a shell. The electric compressor includes an inverter, a cover, and a conductive component. The cover covers the shell and the inverter. The conductive component is electrically connected to the inverter and arranged outside the cover. The cover includes an outer guide surface inclined relative to a forward direction of the vehicle. The outer guide surface has a normal including a forward component directed in the forward direction. The outer guide surface is arranged closer to an outer side of the vehicle than the conductive component.

Electric compressor

A variable displacement compressor that draws refrigerant from a suction pressure zone and discharges the refrigerant to a discharge pressure zone, and controls displacement according to a pressure in a control pressure chamber. The compressor has a cam body, pistons, a supply passage, a release passage, and an on-off valve. The inclination angle of the cam body is changeable based on the pressure in the control pressure chamber. A piston reciprocates in each cylinder bore as the cam body rotates. The supply passage supplies the refrigerant in the discharge pressure zone to the control pressure chamber. The release passage releases the refrigerant in the control pressure chamber to the suction pressure zone. The on-off valve selectively opens and closes the release passage in response to changes of the temperature. The on-off valve shuts off the release passage when the temperature is equal to or higher than a predetermined temperature.

Variable displacement compressor

In a swash plate type compressor, refrigerant in a discharge pressure region is introduced into a crank chamber through a supply passage while the refrigerant in the crank chamber is drawn out to a suction pressure region through a bleed passage for controlling pressure in the crank chamber, whereby inclination angle of a swash plate is changed. A heat-generating sliding portion is provided in the crank chamber. The supply passage includes a communication port that communicates with the crank chamber and a first throttle portion for throttling the refrigerant. At least parts of the supply passage and the bleed passage are formed in a drive shaft. A part of the bleed passage formed in the drive shaft is located between a part of the supply passage formed in the drive shaft and an outer peripheral surface of the drive shaft.

Swash plate type compressor

A heat-insulating mechanism in a compressor which introduces refrigerant gas from a suction pressure region to a compression chamber and discharges the refrigerant gas from the compression chamber to a discharge pressure region has a circular passage, a communication passage, a cylindrical member and a passage heat-insulating member. The circular passage, which is a portion of the suction pressure region, has a circular cross-section, and is in communication with an external refrigerant circuit. The communication passage, which is a portion of the suction pressure region, intersects the circular passage for connection therewith, and is communicable with the compression chamber. The cylindrical member is fitted into the circular passage. The passage heat-insulating member made of an insulating material covers at least a portion of a passage wall surface which forms the communication passage. Rotation of the cylindrical member is prevented by engaging the passage heat-insulating member with the cylindrical member.

Heat-insulating mechanism for compressor

A first swash plateis coupled to a drive shaftto be rotatable integrally with the drive shaft. Single head pistonsare coupled to the first swash platevia shoesA,B. Rotation of the drive shaftrotates the first swash plate, which causes the pistonsto reciprocate and compress refrigerant gas. The first swash platesupports an annular second swash plateto be rotatable relative to the first swash platevia a ball bearing. The second swash plateis arranged between the first swash plateand the shoesB that receive a compressive load to be slidable with respect to the first swash plateand the shoesB. Therefore, the first swash plate reliably slides with respect to the second swash plate.

Swash plate compressor

A swash plate compressor includes a housing that has a cylinder bore and rotatably supports a drive shaft. A swash plate is operatively coupled to the drive shaft for rotation therewith. A piston is accommodated in the cylinder bore for reciprocating movement. First and second spaced shoes are fitted to the piston on a side adjacent to the cylinder bore and on a side away from the cylinder bore, respectively, for coupling the piston to the swash plate. The rolling body is mounted on the swash plate through a bearing and in slide contact with the first shoe. A surface of the rolling body in slide contact with the first shoe or a surface of the first shoe in slide contact with the rolling body has a diamond-like carbon film. A surface of the rolling body in rolling contact with the bearing exposes a base material of the rolling body.

A variable displacement compressor for efficiently cooling and lubricating seals arranged on a rotary shaft. The seals are arranged at end portions of the rotary shaft that project from a housing of the compressor. A first lubrication chamber is defined by a first seal in the housing around the front end portion of the rotary shaft. A second lubrication chamber is defined by a second seal in the housing around the rear end portion of the rotary shaft. A shaft passage extends through the rotary shaft to connect the first and second lubrication chambers. Refrigerant gas including lubricating oil flows from a crank chamber to a suction chamber via the first lubrication chamber, the shaft passage, and the second lubrication chamber. This efficiently cools and lubricates the seals.

A swash plate type variable displacement compressor includes a cylinder block defining a cylinder bore. A housing is fixed to the cylinder block and defines a crank chamber. A drive shaft is rotatably supported by the housing and the cylinder block. A swash plate is supported by the drive shaft in the crank chamber and is inclinable with respect to the axis of the drive shaft. A piston is accommodated in the cylinder bore so as to define a compression chamber in the cylinder bore and is coupled to the swash plate. A control mechanism includes a bleed passage for controlling the pressure in the crank chamber. The compressor is formed such that lubricating oil in the crank chamber is discharged into at least one of the suction chamber, the discharge chamber and the compression chamber while the inclination angle of the swash plate is substantially a maximum inclination angle.

Swash plate type variable displacement compressor

A swash plate compressor that prevents a slide plate from being separated from a swash plate. The compressor includes a drive shaft. A slide plate is rotatable relative to the swash plate. Two shoes is arranged on the swash plate and the slide plate. A bearing arranged between the swash plate and the slide plate and in between the shoes. A piston is connected to the swash plate and the slide plate by the shoes and is reciprocated to compress gas. The swash plate includes a swash plate support surface, and the slide plate includes a slide plate support surface, in which each surface is for contacting the bearing. The swash plate is formed so that a clearance between the swash plate support surface and the slide plate support surface increases radially inwardly of the swash plate and the slide plate.

In a manufacturing method of a valve plate for a compressor according to this invention, a punch dieformed with a convex and concave configuration at its tip end faceis set at a press machineand the punch dieis depressed against a surface of a valve plateto transfer the convex and concave configuration of the tip end faceThus, peripheral portions of a suction port and a discharge port of the valve plateare roughened.

Method of manufacturing a valve plate for compressor

A variable displacement compressor has a drive shaft, a rotor supported by the drive shaft, a drive plate supported by the drive shaft and a hinge mechanism located between the rotor and the drive plate. The hinge mechanism includes a cam, which is located on the rotor, and a guide portion, which is located on the drive plate. The cam has a cam surface, which has a predetermined profile. One of the cam surface and the guide portion slides against the other in accordance with inclination of the drive plate. The guide portion traces a path corresponding to the profile of the cam surface with respect to the cam. The path includes a first path corresponding to a small displacement region of the compressor and a second path corresponding to a large displacement region of the compressor. The profile of the cam surface is determined such that the first path and the second path bulge in a direction opposite to each other to compensate for fluctuation of a top dead center position of the piston.

A piston type compressor includes a housing, which defines a crank chamber. A valve plate forms a part of the housing. A drive shaft is located in the crank chamber. A contact member is plastically deformed and press fitted to the drive shaft. An inner wall and a first sub-plate are located in the housing and limit the axial movement of the drive shaft, respectively. After the contact member is attached to the drive shaft, the axial load required to change the position of the contact member is greater than the maximum axial load applied to the drive shaft due to the increase of the pressure in the crank chamber, and less than the load applied to the contact member by the first sub-plate in accordance with the difference in the thermal expansion coefficient of the housing and the drive shaft.

Means for restricting drive shaft movement for a piston type compressor

A variable displacement compressor has a control valve for controlling the displacement of the compressor. When the pressure in a discharge chamber of the compressor (discharge pressure) is equal to or higher than a first threshold value, a controller executes a limiting control for limiting the discharge pressure. During the limiting control, the controller gradually decreases a duty ratio, which is sent to the control valve, such that the displacement of the compressor is gradually decreased. When the duty ratio is decreased to a reference duty ratio, the controller sets the duty ratio to zero %. As a result, the compressor displacement is minimized and the discharge pressure is lowered. Therefore, the pipes of an external refrigerant circuit does not receive excessive load based on high discharge pressure.

Apparatus and method for controlling variable displacement compressor

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Kariya, Japan

Tetsuhiko Fukanuma