Mitsubishi Heavy Industries Limited

Mitsubishi Heavy Industries Thermal Systems, Ltd.

Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Heavy Industries Automotive Thermal Systems Co., Ltd.

Mitsubishi Industries, Ltd.

Mitsubishi Heavy Industries Automotive Thermal...

Takeshi Hirano

Takayuki Hagita

Yuki Ichise

Hideaki Takahashi

Takayuki Watanabe

Masayuki Ishikawa

Akinori Yoshioka

Takayuki Takashige

Shinichi Takahashi

Koji Nakano

Manabu Suzuki

Ichiro Yogo

Hiroyuki Kamitani

Takashi Nakagami

Nobuya Nakagawa

Koji Toyama

Mikihiko Ishii

Goshi Iketaka

Noriaki Arashi

Makoto Hattori

Kazuhide Watanabe

Kazuki Niwa

Shigeki Miura

Minoru Kawada

Kimiharu Takeda

Hidetaka Sato

Naoto Kunieda

Masakazu Kimura

Norio Hioki

Kazunori Teshima

Yukihiro Sakaguchi

Hisashi Murabayashi

The present invention comprises: a blank forming step in which a casing blank () is formed by die-casting, the casing blank () having a first cylindrical section (), a second cylindrical section (), and an annular section () which includes a recess () recessed toward one side in an axial direction (O) from a first surface () facing the other side in the axial direction (O); and a cutting step in which the inner peripheral surface () of the second cylindrical section () and a second surface () of the annular section (), the second surface () facing the one side in the axial direction (O), are cut to connect the recess () to a compression section containing space (A) within the second cylindrical section (), thereby forming a flow passage. In the blank forming step, the casing blank () is formed such that a part of a side surface () of the recess () is disposed radially outside the inner peripheral surface () of the second cylindrical section ().

Method for manufacturing compressor casing, casing blank, and compressor casing

A scroll compressor includes a flow path that is disposed in a portion of a bearing holder, which corresponds to each formation position of a plurality of stator groove portions, and that penetrates the bearing holder in an axial direction, a first recess portion () disposed in a portion of a thrust bearing, which faces the flow path, and recessed from one side in the axial direction to the other side in the axial direction, and a first groove portion () disposed in an outer peripheral portion of the first recess portion (), extending from a bottom surface () of the recess portion () to a surface located on a side opposite to a surface having the first recess portion () formed thereon, and communicating with the first recess portion () in the axial direction.

Scroll compressor

Provided is an air conditioning apparatus that is capable of suppressing increases in volume and cost of the apparatus and performing more suitable overheating protection. An electric compressor is an inverter-integrated electric compressor () integrally including a compressor (), an electric motor () that drives the compressor (), and an inverter () including a temperature sensor () that detects the temperature in the vicinity of a semiconductor switching device, wherein a controller () estimates a discharge temperature of the compressor () on the basis of a correlation of respective pressure loading characteristics for the detected temperature of the inverter (), for the rotational speed of the compressor (), and for the motive force of the compressor () in a refrigerating cycle ().

Air conditioning apparatus

An electric compressor includes a compression unit that compresses a refrigerant, an electric motor that is coupled with the compression unit via a main shaft and a housing that accommodates the compression unit and the electric motor. The electric compressor further includes an end-side bearing holding part that is provided near an axial end of the housing closer to the electric motor and a rolling bearing that has an outer ring press-fitted into the end-side bearing holding part and an inner ring into which an end of the rotating shaft is press-fitted, and that supports the main shaft, in which an opening into which an assembly jig for supporting the rolling bearing when the main shaft is press-fitted into the inner ring can be inserted and removed is provided in an end surface of the housing near the end-side bearing holding part.

Electric compressor with blocking plate

Provided is an air conditioning apparatus that is capable of suppressing increases in volume and cost of the apparatus and performing more suitable overheating protection. An electric compressor is an inverter-integrated electric compressor integrally including a compressor, an electric motor that drives the compressor, and an inverter including a temperature sensor that detects the temperature in the vicinity of a semiconductor switching device, wherein a controller estimates a discharge temperature of the compressor on the basis of a correlation of respective pressure loading characteristics for the detected temperature of the inverter, for the rotational speed of the compressor, and for the motive force of the compressor in a refrigerating cycle.

Provided is a gasket (), which is used in a motor-driven compressor including an inverter housing, including a flat core of metal () and an elastic foamed material () so disposed as to cover both surfaces of the core (), and the gasket () has embossed recesses and projections () with predetermined shapes. It is possible to enhance sealing performance to seal the inverter housing by using this gasket (). A motor-driven compressor using this gasket () enhances vibration prevention.

Gasket and motor-driven compressor

In an inverter-integrated electric compressor () provided with an inverter accommodating section () on the periphery of a housing () and an inverter () provided therein, the inverter accommodating section () is divided into a first accommodating section () accommodating an inverter module () equipped with a power system board on which semiconductor switching devices etc. are mounted and a CPU board on which a control and communication circuit etc. are mounted, and a second accommodating section () accommodating high-voltage-system components (), such as a common-mode coil (), a normal-mode coil (), and a smoothing capacitor (), provided on a high-voltage line () for supplying DC power from a high-voltage power supply to the inverter module (), the accommodating sections () and () being separately provided on the periphery of the housing ().

Inverter-integrated electric compressor

The properties of lubricating oil are utilized to avoid excessive quality in terms of the circularity of roller members while reducing the noise from a radial roller bearing alone during rotation and thereby reducing the noise from a rotary machine. The radial roller bearing includes an outer ring member (A), a plurality of roller members (B), and a retainer, and a lubricating oil (O) is supplied between the outer ring member (A) or a rotating shaft and the roller members (B). The circularity (&#x394;R) of the roller members (B) in a cross section perpendicular to a centerline (CL) thereof is set to be lower than or equal to the minimum oil film thickness (h) of an oil film formed by the lubricating oil (O).

Radial roller bearing, rotary machine including radial roller bearing, and method for designing radial roller bearing

In rollers used in a radial needle bearing, the circularity of crowning sections provided at opposite ends of each roller is 0.6 &#x3bc;m or smaller. This allows for reduction of sound (noise) produced when the radial needle bearing rotates by itself and can also allow for reduction of sound (noise) of a rotational machine when the radial needle bearing is installed and rotates therein.

Radial needle bearing

Provided is an inverter-integrated electric compressor in which the layout of a wiring path connected to an IPM is optimized, the wiring path is simplified, and the noise interference due to disturbance is suppressed, thereby improving the controllability. In an inverter-integrated electric compressor in which an inverter box is provided on the outer periphery of a housing accommodating a compressor and a motor, the inverter box integrally accommodating an inverter device, the inverter device includes an IPM constituting an inverter circuit, and UVW output terminals arranged on one side of the IPM are disposed, in the inverter box, so as to face a glass-sealed terminal that applies power from the inverter device to the motor.

A scroll compressor in which a paired fixed scroll and rotating scroll each having a spiral wrap provided upright on an end plate are engaged to form a compression chamber and in which a discharge port that discharges fluid compressed in the compression chamber is provided at the central portion of the fixed scroll, wherein the discharge port has a deformed elongated hole shape having circular holes at both ends, and the circular holes at both ends are connected by two surfaces the width between which is smaller than the hole diameters of the circular holes.

Scroll compressor and method for machining discharge port of the same

A main-bearing outer diameter of an electric motor is made smaller than a rotor outer diameter without causing a drop in production efficiency, and the ease of performing a shrink-fitting step is also enhanced by making it possible to mount a rotor to a main shaft in an early stage. A bearing journal portion () of a main shaft () of an electric motor is formed in a shape into which an inner race () of a main bearing () can be press-fitted from both sides in the axial direction thereof, and, in addition, an outer diameter of the bearing journal portion () is made larger than an outer diameter of a rotor press-fitting portion (), whereas a bearing bore portion () of a partition member () is formed in a shape into which an outer race () can be press-fitted from both sides in the axial direction thereof. It is preferable that a space (S) into which a press-fitting tool for press-fitting the main bearing () can be inserted be provided between the rotor press-fitting portion () of the main shaft () and the bearing journal portion () thereof.

Electric compressor and assembly method thereof

In an inverter in which noise reducing coils and a smoothing capacitor are provided on a power line to an inverter module to achieve a no-busbar configuration, simplification of the manufacturing process, reduction of the influence on the size of the inverter, enhanced noise reducing function, reduction in cost and so on, the smoothing capacitor is electrically connected, on the inverter module, to the power line in parallel with a power system board, and the noise reducing coils are connected to the power line by directly connecting output lead wires thereof to P-N terminals of the inverter module.

Inverter and integrated-inverter electric compressor

Disclosed is an in-vehicle integrated-inverter electric compressor () in which an inverter accommodating section () is provided on the periphery of a housing (), an inverter device is installed in the inverter accommodating section (), and the opening portion of the inverter accommodating section () is sealed by means of a cover member () to be fixed with screws. A safety mechanism () is provided such that some of the fixing screws () fixing the cover member () to the inverter accommodating section () cannot be removed when the electric compressor () is mounted in a vehicle.

In-vehicle integrated-inverter electric compressor

Provided is an integrated-inverter electric compressor with suppressed self-noise interference in an inverter unit, simplified electrical connections between an inverter circuit and a filter circuit, and fewer welded positions. A housing () has, on the periphery thereof, an inverter box () accommodating the inverter circuit () and a junction box () communicating with the inverter box () and accommodating a plurality of high-voltage components constituting a noise-suppression filter circuit (). The plurality of high-voltage components accommodated in the junction box () are electrically connected via a busbar (). The busbar () includes branched busbars () branched off near connections with a high-voltage component installed close to the inverter circuit (), and the branched busbars () are connected to P-N terminals () of the inverter circuit () in a communicating section () between the junction box () and the inverter box ().

Growing community of inventors

Tokyo, Japan

Takeshi Hirano