Hitachi Appliances, Inc

Hitachi, Ltd.

Hitachi-johnson Controls Air Conditioning, Inc.

Johnson Controls-hitachi Air Conditioning Technology (hong Kong) Limited

Masashi Miyake

Masaru Ohtahara

Mutsunori Matsunaga

Kenji Tojo

Hiromu Takeda

Masatsugu Chikano

Yuichi Yanagase

Shoji Matsumura

Keiji Tanaka

Satoshi Kikuchi

Takeshi Tsuchiya

Takao Mizuno

Takahiro Tamura

Hiroyuki Mikami

Kazuo Sakurai

Satoshi Nakamura

Tomio Yoshikawa

Hiroyuki Imamura

Yasushi Izunaga

Akeshi Takahashi

Baiying Huang

Kazuyuki Fujimura

Shuji Hasegawa

Hideyuki Kumakura

Makoto Aoki

Yoshinobu Yosuke

Syuuji Hasegawa

Mutsumi Otsuka

Katsuya Ohashi

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 includes a fixed scroll and an orbiting scroll. Shapes of laps of the fixed scroll and the orbiting scroll are formed by an asymmetric tooth shape in which orbiting angles of an external line side compression room formed on an external line side of the orbiting scroll lap and an internal line side compression room formed on an internal line side of the orbiting scroll lap in finishing suction differ from each other. A communicating section control groove sets communicating sections communicating the respective inlet side openings of respective fluid outflow paths and a back pressure room. The communicating sections include a first communicating section of an internal line side compression room that is shorter than a second communicating section of an external line side compression room.

Scroll compressor with intermittent communication between back pressure chamber and compression chambers

The lap shapes of a fixed scroll and an orbiting scroll are configured in an asymmetric tooth profile. In the bed plate of an orbiting scroll, a fluid effluence channel communicating with an external line side compression room of an orbiting scroll lap and another fluid effluence channel communicating with an internal line side compression room are formed, and the outlet side opening of each fluid effluence channel opens in the lap tooth bottom of the orbiting scroll, and inlet side openings are formed in a face of the bed plate that is in sliding contact with the bed plate face of the fixed scroll. In the face of the bed plate, a communicating section control groove that lets the inlet side openings of the two fluid effluence channels and the back pressure room intermittently communicate with each other.

Scroll compressor with channels intermittently communicating internal and external compression chambers with back pressure chamber

The inside of a sealed container () of a horizontal scroll compressor is partitioned by a partition plate () into a space in which a compressor mechanism section and an electric motor are contained and into a discharge space () in which a discharge pipe () and an oil supply pump () are contained. An upper communication path () and a path guide member () are provided in the upper part of the partition plate, and a refrigerant gas passes through the upper communication path (). The path guide member is located below the discharge pipe (), is extended to a position near a side surface of the sealed container, and has a path area greater than the path area of the discharge pipe. The construction causes the refrigerant gas to collide with the side surface of the sealed container, promoting separation of oil, and even if the oil is re-dispersed by a gas flow, the construction reduces flow directly leading to the discharge pipe.

Horizontal scroll compressor

A self-starting type permanent magnet synchronous motor comprises a stator and a rotor. The rotor comprises a rotor core having a plurality of slots provided in an outer periphery thereof and a cage winding comprising conductive bars embedded in the slots and conductive end rings that short-circuit the conductive bars on both end faces of the bars in an axial direction thereof. The rotor core comprises at least one magnet insertion hole arranged on an inner peripheral side from the slots, and at least one permanent magnet embedded in the at least one magnet insertion hole. When a pole center axis is denoted as a d-axis and an axis deviating from the pole center axis by an electrical angle 90&#xb0; is denoted as a q-axis, a flux content generated by the cage winding during start-up becomes maximal in the vicinity of and on one of the d-axis and the q-axis.

Self-starting type permanent magnet synchronous motor and a compressor using the same

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

A horizontal type scroll compressor is provided with a support plate separating an inside of the sealed container into a first space in which the compressor mechanism portion and the electric motor portion are stored, and a second space in which the discharge pipe is provided, and a communication path communicating a bottom portion of the first space and a space above the drive shaft within the second space in a lower side of the support plate, and regulates an oil level by the communication path in the case that the oil level difference becomes large at a time of a high-speed operation. In order to stabilize the oil supply to the bearing or the like, the oil is supplied by an oil pump provided in a shaft end portion of the drive shaft close to an oil reserving chamber.

Horizontal type scroll compressor including a first space and a second space

A closed type scroll compressor has a drive shaft supported by a frame through bearings lubricated with a lubricating oil supplied from an oil reservoir via a lubricating oil passage bore formed in the drive shaft. The end of the drive shaft in which the upstream end of the lubricating oil passage bore opens is connected to the oil reservoir through a joint tube which is supported by supporting structures including a combination of a spherical slide bearing and slide bearing and capable of taking up any mounting error or displacement of the drive shaft in any direction. The compressor can be assembled easily without any risk of uneven or local contact of each sliding portion.

Closed type scroll compressor with spherical slide bearing for the oil

Growing community of inventors

Shizuoka, Japan

Masashi Miyake