Hitachi, Ltd.

Hitachi Air Conditioning Systems Co., Ltd.

Syunsuke Yasunori

Mutsunori Matsunaga

Kenji Tojo

Isao Hayase

Takeshi Tsuchiya

Takao Mizuno

Susumu Nakayama

Isamu Tsubono

Masaru Ohtahara

Yoshikatsu Tomita

Kazuyuki Fujimura

An apparatus for driving a compressor comprises a compressor having a compression mechanism part for sucking a fluid to compress the same, and an electric motor for driving the compression mechanism part, and an inverter device for driving the electric motor at variable speeds. The electric motor comprises a self-starting type electric motor having a rotor, which comprises a cage conductor and a polarized permanent magnet, and the inverter device comprises a plurality of semiconductor switches for controlling drive frequencies of the electric motor.

Apparatus for driving a compressor and a refrigerating air conditioner

A second frame is arranged between a first frame and an orbiting scroll, and a central space and an outer peripheral space are sealed off by a seal portion, which is formed between an end surface of a shaft support of the orbiting scroll and the second frame. Also, a balance weight is arranged in a space between an underside of the second frame and the first frame. Thereby, most of an oil having lubricated respective shaft supports flows into the space below the second frame, and the oil accumulated in the space is discharged through an oil scavenge pipe into an oil reservoir in a lower portion of a closed vessel. Also, since the balance weight can be assembled from a side of the orbiting scroll in a state, in which the second frame is removed, it is possible to mount the balance weight close to the orbiting scroll.

Scroll fluid machine

Growing community of inventors

Shizuoka, Japan

Syunsuke Yasunori