Sanyo Electric Co., Ltd.

Masayuki Hara

Takahiro Nishikawa

Hirotsugu Ogasawara

Akihiro Suda

Akira Hashimoto

Hiroyuki Yoshida

Hiroyuki Sawabe

Yoshihisa Kogure

Masazumi Sakaniwa

Yoshiaki Hiruma

Takayasu Saito

Yasunori Kiyokawa

Hidetaka Sasaki

Takao Kanayama

Makoto Aida

Makoto Oonuki

Kouichiro Kubota

Jisuke Saitou

There is disclosed a rotary compressor which delays a pressure rise on a high pressure chamber side in a cylinder of a rotary compression element to decrease a high pressure load applied to a roller and a rotary shaft, thereby improving performance. In the rotary compressor including a sealed container in which an electromotive element (a driving element) and first and second rotary compression elements driven by a rotary shaft of the electromotive element are included, each of the rotary compression elements being constituted of a cylinder, a roller fitted into an eccentric portion formed on the rotary shaft to eccentrically rotate in the cylinder, and a vane which abuts on the roller to partition the inside of the cylinder into a low pressure chamber side and a high pressure chamber side, the inner diameter of a suction passage formed in each cylinder is 59% or more and 70% or less of the thickness of the cylinder.

Rotary compressor and manufacturing method of the same

There is disclosed a multicylindrical rotary compressor capable of improving an operation efficiency during a small-capacity operation, the compressor comprises a controller as a control unit which adjusts a rotation number of an electromotive element as a driving element and which controls an operation of a power saving mechanism, and the controller operates the power saving mechanism to connect a high-pressure chamber side of a first cylinder to a low-pressure chamber side of a second cylinder during the small-capacity operation of a refrigerant circuit constituted in a rotary compressor (the multicylindrical rotary compressor).

Multicylindrical rotary compressor

In a multicylindrical rotary compressor constituted to be usable by urging an only first vane with respect to a first roller by means of a spring member to switch a first operation mode in which first and second rotary compression elements perform compression works and a second operation mode in which substantially the only first rotary compression element performs the compression work, an object is to reduce generation of collision noises due to collision of the second vane with the second roller at a time when the first operation mode is switched to the second operation mode, and a pressure in a back-pressure chamber of the second vane is discharged on a low-pressure chamber side in a second cylinder in a case where the first operation mode is switched to the second operation mode.

Multicylindrical rotary compressor, compression system, and freezing device using the compression system

In a hermetically sealed compressorincluding a rotary compressing element () having at least one cylinder (A,B), and a roller () provided to the cylinder so as to be freely eccentrically rotatable, an electrically-driven element () for driving the roller () and a hermetically sealed container in which the rotary compressing element and the electrically-driven element are accommodated, oil () being stocked in the hermetically sealed container (), the oil () in the hermetically sealed container () is injected into the compression chamber () when refrigerant is sucked into the compression chamber () of the cylinder.

Hermetically sealed compressor and method of manufacturing the same

An object is to avoid generation of a collision sound of a second vane of a compression system comprising a multicylinder rotary compressor being configured to be used by switching of a first operation mode in which both rotary compression elements perform a compression work and a the second operation mode in which the only first rotary compression element substantially performs the compression work. When the second operation mode is switched to the first operation mode, discharge-side pressures of both the rotary compression elements are applied as a back pressure of the second vane, and thereafter an intermediate pressure is applied which is between suction-side and discharge-side pressures of both the rotary compression elements. When the first operation mode is switched to the second operation mode, a valve device interrupts flowing of a refrigerant into a second cylinder, and thereafter suction-side pressures of both the rotary compression elements are applied as the back pressure of the second vane.

Compression system, multicylinder rotary compressor, and refrigeration apparatus using the same

A hermetically sealed rotary compressorincluding an electrically-driven element, a rotary compressing elementequipped with a cylinderhaving a compression chamberand a hermetically sealed containerin which oilis stocked, is equipped with an oil pathfor injecting the oilinto the compression chamberwhen refrigerant is sucked into the compression chamber, and an opening/closing valvefor opening/closing the oil pathin accordance with the discharge pressure of the rotary compressing elementof the pressure of the compressed refrigerant compressed by the rotary compressing element

Hermetically sealed compressor having oil supply mechanism based on refrigerant pressure

A compressor includes two rotary compressing elements in a vessel. One of the compressing elements operates while the other element is in a non-operating mode. In the non-operating mode, inflow of refrigerant gas into the cylinder of the rotary compressing element is blocked and a suction side pressure of the rotary compressing element is applied as a back pressure to a vane. A compressing system includes the compressor and a controller and operates in first and second operation modes. In the first operation mode, refrigerant gas flows into a cylinder and an intermediate pressure, a result of flow of the refrigerant gas from between a vane and a guide groove into a back pressure portion, between a suction side pressure and a discharge side pressure, is applied as a back pressure to bias the vane against a roller.

Multicylinder rotary compressor and compressing system and refrigerating unit provided with same

A compressor having a compression member whose upper surface crosses an axial direction of a rotary shaft and is inclined continuously between a top dead center and a bottom dead center and which is disposed in a cylinder to be rotated by a rotary shaft and which compresses a fluid sucked from a suction port to discharge the fluid via a discharge port; a vane disposed between the suction port and the discharge port abuts on the upper surface of the compression member and partitions a compression space in the cylinder into a low pressure chamber and a high pressure chamber; the upper surface of the compression member has a flat surface centering on an intermediate point between the top dead center and the bottom dead center and curved surfaces gradually approaching the top dead center and the bottom dead center continuously from the flat surface.

Compression member and vane of a compressor

Previous compressors have employed compressors to compress and circulate refrigerant through a circuit, and have been unable to combine the differing advantages of rotary compressors, scroll compressors and screw compressors. The present invention combines these advantages, as well as inhibiting refrigerant leakage and improving overall performance, by particularly fixing the position of the compression member of the compression element relative to the driving element. The driving element is stored in a sealed container of the compressor. The compression element includes a cylinder having suction and discharge ports and a compression member which compresses a fluid (refrigerant) sucked from the suction port to discharge the fluid via the discharge port; and a vane partitioning the compression space in the cylinder into a low pressure chamber and a high pressure chamber.

Compressor having back pressure vane controlled for improving oil distribution

A compressor packaging apparatus for fixing plural compressors each of which has dish-shaped end caps at both the upper and lower end portions of a cylindrical compressor body, including an upper plate and a lower plate between which the compressors are sandwiched and fixed, the lower plate being equipped with a plurality of stepped fitting portions in which the lower end caps of the compressors are fitted, and first paper pipes fitted to the stepped fitting portions. Furthermore, an intermediate plate having plural insertion holes in which the compressor bodies are inserted is provided, and second paper pipes fitted to the end caps at the upper portions of the compressors and third paper pipes may be provided between the upper plate and the intermediate plate.

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Ota, Japan

Masayuki Hara