Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Ryodin Kasei Co., Ltd.

Hitoshi Tokuyama

Yoshihito Asao

Hirofumi Fujioka

Yoshinori Shirafuji

Fumiyuki Miyamoto

Shinobu Ogasawara

Yasushi Akahori

Hiroki Katayama

Yukio Hidaka

Tomotaka Makino

A stator coilis installed in a stator core, and an insulating resin is impregnated into slot portionsand hardened. The stator coilis constituted by enameled wires in which a polyamideimide resin layer has been applied radially outside a copper wire and hardened, and the insulating resin contains as a major component a THEIC-modified polyester resin that has been modified by a fatty acid.

Dynamoelectric coil portion insulating construction

A process for producing a hermetic electric compressor for a refrigerating or air-conditioning apparatus using a refrigerant having a hydrofluorocarbon base which comprises a motor unit, a compressing unit driven by the motor unit and a sealed housing enclosing the motor unit and the compressing unit and stores a refrigeration oil on the bottom of the sealed housing, wherein a solventless varnish comprising a thermosetting resin having at least two (meth)acryloyl groups in one molecule, a low-viscosity vinyl or 1-alkylvinyl monomer having an ether or ester linkage as a reactive diluent and an organic peroxide as a reaction initiator is used as an insulating varnish to insulate and fix the magnet wires of the stator of the motor unit, and the solventless varnish is cured by heating at a temperature of from 153 to 180.degree. C. for from 0.5 to 3.5 hours.

Process for producing a hermetic electric compressor

Growing community of inventors

Sanda, Japan

Hitoshi Tokuyama