| US 7,524,174 B2 | ||
| Compression system, multicylinder rotary compressor, and refrigeration apparatus using the same | ||
| Takahiro Nishikawa, Ota (Japan); Hirotsugu Ogasawara, Ota (Japan); Akihiro Suda, Gunma-ken (Japan); Masayuki Hara, Gunma-ken (Japan); Hiroyuki Sawabe, Ota (Japan); Hiroyuki Yoshida, Gunma-ken (Japan); and Akira Hashimoto, Ota (Japan) | ||
| Assigned to Sanyo Electric Co., Ltd., Moriguchi-shi (Japan) | ||
| Filed on Jul. 06, 2005, as Appl. No. 11/174,476. | ||
| Claims priority of application No. 2004-201601 (JP), filed on Jul. 08, 2004; application No. 2004-201915 (JP), filed on Jul. 08, 2004; application No. 2004-202994 (JP), filed on Jul. 09, 2004; application No. 2004-203001 (JP), filed on Jul. 09, 2004; and application No. 2004-235419 (JP), filed on Aug. 12, 2004. | ||
| Prior Publication US 2006/0008360 A1, Jan. 12, 2006 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. F03C 2/00 (2006.01) | ||
| U.S. Cl. 418—60 [418/23; 418/24; 418/11] | 2 Claims |
| 1. A compression system comprising:
a multicylinder rotary compressor in which a sealed container stores a driving element and first and second rotary compression
elements driven by a rotation shaft of the driving element,
the first and second rotary compression elements comprising:
first and second cylinders;
first and second rollers which are fitted into eccentric portions formed in the rotation shaft and which eccentrically rotate
in the respective cylinders; and
first and second vanes which abut on the first and second rollers to partition the inside of each cylinder into low and high-pressure
chamber sides, only the first vane being urged toward the first roller by a spring member,
wherein the compressor has a first operation mode in which both the rotary compression elements perform a compression work
and a second operation mode in which only the first rotary compression element substantially performs the compression work,
wherein in the first operation mode an intermediate pressure, which is between suction-side and discharge-side pressures of
both the rotary compression elements, is applied to a back pressure of the second vane, and in the second operation mode the
suction-side pressure is applied to the back pressure of the second vane,
wherein in switching between the second operation mode to the first operation mode the discharge-side pressures of both the
rotary compression elements are applied to the back pressure of the second vane, and thereafter the intermediate pressure
is applied.
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