US 12,012,959 B2
Scroll compressor
Atsuo Teshima, Isesaki (JP); Misako Kaburagi, Isesaki (JP); and Tetsuya Imai, Isesaki (JP)
Assigned to SANDEN CORPORATION, Isesaki (JP)
Appl. No. 18/256,572
Filed by SANDEN CORPORATION, Isesaki (JP)
PCT Filed Nov. 19, 2021, PCT No. PCT/JP2021/042521
§ 371(c)(1), (2) Date Jun. 8, 2023,
PCT Pub. No. WO2022/137923, PCT Pub. Date Jun. 30, 2022.
Claims priority of application No. 2020-211995 (JP), filed on Dec. 22, 2020.
Prior Publication US 2024/0026881 A1, Jan. 25, 2024
Int. Cl. F04C 18/02 (2006.01); F04C 23/00 (2006.01); F04C 29/00 (2006.01)
CPC F04C 18/0215 (2013.01) [F04C 23/008 (2013.01); F04C 29/0021 (2013.01); F04C 29/005 (2013.01); F04C 29/0057 (2013.01); F04C 2240/56 (2013.01); F04C 2240/807 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A scroll compressor comprising:
a fixed scroll including a fixed base plate and a fixed spiral wall erected on the fixed base plate;
an orbiting scroll including an orbiting base plate, an orbiting spiral wall that is erected on one surface of the orbiting base plate and meshes with the fixed spiral wall, and a cylindrical part erected on another surface of the orbiting base plate;
a compression chamber formed between the fixed scroll and the orbiting scroll; and
a driving force transmission mechanism that includes a drive shaft to be rotated, an eccentric pin provided at one end of the drive shaft, and an eccentric bush rotatably attached to the eccentric pin and rotatably inserted into the cylindrical part via a bearing, and transmits a driving force to the orbiting scroll, wherein
the scroll compressor is configured such that a volume of the compression chamber changes and a fluid taken into the compression chamber is thereby compressed when the orbiting scroll orbits by the driving force relative to the fixed scroll;
the scroll compressor further comprises
a shaft balancer that is integrated with the drive shaft and includes a first weight disposed on an opposite side from the eccentric pin with respect to a center line of the drive shaft, and
a bushing balancer that is integrated with the eccentric bush and includes a second weight disposed on a radially outer side of the eccentric bush and on an opposite side from a center line of the eccentric pin with respect to a center line of the eccentric bush; and
in a view from an axial direction of the drive shaft, the second weight is symmetric with respect to a virtual line passing through a center of the drive shaft and a center of the eccentric bush, and the first weight is asymmetric with respect to the virtual line.