公开(公告)号：US11933298B2

公开(公告)日：2024-03-19

申请号：US17615751

申请日：2020-06-23

Applicant: SANDEN AUTOMOTIVE COMPONENTS CORPORATION

Inventor： Atsuo Teshima

IPC: F04C18/02

CPC classification number: F04C18/0215

Abstract: A scroll compressor is provided which is capable of performing an adjustment to appropriate back pressure in both a low-speed operation condition and an operation condition low in suction pressure by improving the position or dimension of a back pressure hole. The scroll compressor includes a back pressure chamber 29 formed on the back surface of a mirror plate 31 of a movable scroll 22, and back pressure holes 51 and 52 formed in the mirror plate of the movable scroll and providing communication between the back pressure chamber and the compression chamber 34. After the back pressure hole 52 is opened inside a lap 32 of the movable scroll in a first crank angle range, the back pressure hole 52 is temporarily closed by a lap 24 of a fixed scroll 21 and then opened inside the lap of the fixed scroll in a second crank angle range.