Mitsubishi Heavy Industries Limited

Mitsubishi Heavy Industries Thermal Systems, Ltd.

Yogo Takasu

Hajime Sato

Kenji Shimizu

Shinichi Isobe

Yoshiyuki Kimata

Shunsuke Yakushiji

Takuma Yamashita

Taichi Tateishi

Hisao Mizuno

Susumu Matsuda

Masahiro Taniguchi

Kazuki Takahashi

Yoshiaki Miyamoto

Akihiro Kanai

Masanari Uno

Masashi Hamano

Yoshiyuki Okada

Youhei Hotta

Junichi Takada

Emiri Uchikawa

Hisahito Taki

Hiromi Ichikawa

An object is to provide a hermetic electric compressor that can simplify the installation structure of an internal protector and improve the ease-of-assembly thereof. In a hermetic electric compressor having a compressor and an electric motor () built into a sealed housing (), the electric motor () includes a stator () to which plastic insulating bobbins () having flanges (B,C) on an inner and outer circumferences of a plurality of tooth parts of a stator core are fitted and around which a stator winding wire (A) is wound in concentrated winding around the plastic insulating bobbins (), and an internal protector () for electric-motor protection is latched between the inner and outer circumferential flanges (B,C) of the plastic insulating bobbins () by being urged against the stator winding wire (A).

Hermetic electric compressor

A scroll compressor performing three-dimensional compressions, which can optimize a tip clearance in operation while considering a thermal expansion and a pressure deformation and which can reduce a compression leakage to improve a compression efficiency thereby to realize a high performance. The leading end faces (and) and the bottom face of a spiral wrap () have a step portion (), and the wrap height on the outer circumference side of the spiral wrap () is made larger than that on the inner circumference side wrap height. The spiral wrap () on the inner circumference side with respect to the step portion () is stepwise or continuously made gradually lower toward the center side of the spiral wrap (), and the tip clearance (&#x394;i) of the spiral wrap on the inner circumference side with respect to the step portion () is made gradually larger toward the center side of the spiral wrap ().

Scroll compressor having a gradually changing tip clearance

A scroll compressor prevents the rotation of an orbiting scroll and reduces manufacturing cost. This scroll compressor has a housing, a fixed scroll having a first end plate and a first spiral wall body, an orbiting scroll having a second end plate and a second spiral wall body, rotation-preventing portions provided for at least one of the housing and the orbiting scroll, which allow the orbiting scroll to revolve while preventing the rotation thereof, a wall body shoulder portion formed along an upper edge of the second spiral wall body, and a step portion formed on the first end plate. In this scroll compressor, the shoulder portion and the step portion contact with and slide along each other, and a phase at which the shoulder portion is disposed to the center of the orbiting scroll is different from phases at which the rotation-preventing portions are disposed.

Scroll compressor having shoulder and rotation-preventing portions positioned as different phases

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Tokyo, Japan

Yogo Takasu