Mitsubishi Denki Kabushiki Kaisha

Tatsuaki Shimizu

Yoshihiro Sumida

Susumu Kawaguchi

Satoru Toyama

Noboru Masuda

Hiroshige Konishi

Hitoshi Maruyama

Shinobu Ogasawara

Takuho Hirahara

Sou Suzuki

Yasushi Akahori

Katsuyuki Kawasaki

Akemi Ueyama

A refrigerant circulating system that uses a highly polar refrigerant, as typified by a hydrofluorocarbon-based one, and a refrigerating oil that has slight solubility with a liquid refrigerant on the condensation side. Also, a refrigerant circulating cycle that uses a highly polar refrigerant, as typified by a hydrofluorocarbon-based one, and a refrigerating oil that has a slight solubility with a liquid refrigerant and which has a greater specific gravity than the liquid refrigerant. Thereby, it provides a high electrical insulation and moisture resistance, good oil return to the compressor, and high reliability.

Refrigerant circulating system

A method of assembling a closed loop refrigerating air conditioning system using a hydrofluorocarbon refrigerant by applying a first oil which is insoluble with the hydrocarbon refrigerant to components of a compressor, and storing the insoluble oil within the housing of the compressor in a single or mixed state.

Refrigeration device using hydrofluorocarbon refrigerant

A refrigeration device comprising a compressor, a condenser, an evaporator, an accumulator and a refrigerant is described. Lubricating oil present in the compressor is chosen so as to be insoluble with the refrigerant, and a particular accumulator design is described to ensure return of oil back to the compressor.

Growing community of inventors

Shizuoka, Japan

Tatsuaki Shimizu