Hitachi Appliances, Inc

Hitachi-johnson Controls Air Conditioning, Inc.

Yuichi Yanagase

Mutsunori Matsunaga

Masatsugu Chikano

Satoshi Nakamura

Masaru Ohtahara

Masashi Miyake

Kenji Tojo

Takeshi Tsuchiya

Isamu Tsubono

Eiji Sato

Hiroyuki Imamura

Kazuyuki Fujimura

Hiromu Takeda

Makoto Aoki

Yoshinobu Yosuke

Syuuji Hasegawa

A compressor is provided with a fixed scroll having a spiral lap erected on a bed plate; an orbiting scroll having a spiral lap erected on a panel and forming a compression room meshed with the fixed scroll; and an orbiting bearing disposed penetrating the panel and the central part of the lap of the orbiting scroll, wherein a lap center is so shifted from a panel center out of alignment in a direction in which, within a range in which the orbiting bearing can be formed in the central part of the lap, the longer of the minimum distance between the lap winding end position of the orbiting scroll and the outer circumference of the panel and the minimum distance between the outermost circumferential part and the outer circumference of the panel in an approximately 90&#xb0; direction of becomes the shortest distance.

Scroll compressor and air conditioner

A scroll compressor is provided in which the amount of lubricant oil supply is appropriately controlled over a low to high rotational frequency range of the scroll compressor. The scroll compressor has an oil supply unit and an oil supply passage. The oil supply unit includes a small hole with a diameter not exceeding a seal ring width of the sealing part and a groove which are formed on the end plate of the boss portion on the back side of the orbiting scroll. As the orbiting scroll orbitally moves, oil in the high pressure hydraulic chamber pools in the small hole to be discharged, across the seal ring, into the back pressure chamber. The oil supply passage communicates between the high pressure hydraulic chamber and the back pressure chamber.

Scroll compressor with oil supply across a sealing part

A scroll fluid machine comprises compression chambers defined with an orbiting scroll orbiting relative to a fixed scroll, and a back pressure chamber provided on the face opposite from a wrap of the orbiting scroll. A back pressure port is provided, which is formed in an end-plate of the orbiting scroll and connects from a compression chamber side opening opened to a compression chamber side and to a back pressure chamber side opening opened to a back pressure chamber side. The compression chamber side opening is opened and closed by an end-plate of the fixed scroll according as the orbiting motion of the orbiting scroll to perform connection and blockage of the back pressure port. The flow resistance of fluid flowing in and out between the back pressure chamber and the compression chamber is reduced and the compression efficiency and reliability are improved.

Scroll fluid machine

Growing community of inventors

Namegata, Japan

Yuichi Yanagase