公开(公告)号：US11953005B2

公开(公告)日：2024-04-09

申请号：US17777694

申请日：2020-01-22

申请人： Mitsubishi Electric Corporation

发明人： Wataru Sasano ,  Koji Masumoto ,  Yuji Takamura ,  Kohei Tatsuwaki

IPC分类号： F04C18/02 ,  F04B39/02 ,  F04C23/00 ,  F04C28/26 ,  F04C29/02

CPC分类号： F04C18/0253 ,  F04C18/0215 ,  F04C28/26 ,  F04C29/02 ,  F04C29/025 ,  F04C29/028 ,  F04B39/02 ,  F04B39/0246 ,  F04B39/0261 ,  F04B39/0284 ,  F04C23/008 ,  F04C2240/603 ,  F04C2270/205

摘要： A compressor includes: a shell forming an outer portion thereof and having lower part in which an oil pan is formed to store oil; a motor provided in the shell; a compression unit provided in the shell to compress a working gas when being driven by the motor; a frame fixed to the shell and supporting the compression unit; a shaft supported by the frame, connecting the motor and the compression unit, provided to transmit a turning force of the motor to the compression unit, and including an oil passage; and an oil pump provided at lower part of the shaft to draw oil from the pan and supply the oil into the oil passage. The pump includes a bypass valve that is opened, when a pressure of oil flowing in the oil passage is higher than a threshold pressure, to return part of the oil to the pan.