To obviate any oil temperature drop due to a liquid refrigerant in time of liquid back operation by installing a partitioning member partitioning a liquid sump, to be installed in the bottom of a shell, into both first and second liquid sumps, and opening an oil pump part in this first liquid sump.
A refrigerant induced from a suction pipe 82 passes through a clearance in a frame 5, and sucked in a compression space from an inlet port 100a of a fixed scroll 1 and/or passing through a clearance between a shell 8 and a motor 7, then it is turned over at a motor side airspace 84, finally it is sucked in the compression space after passing through an air gap of the motor 7. In addition, in time of liquid backing, a liquid refrigerant passes through a clearance between the shell 8 and the motor 7, and it is collected in a liquid sump 87 out of two liquid sumps 86 and 87 partitioned off by a partition member 13. Oil lubricating even bearing part gets into the liquid sump 86 by way of an oil pipe connected to a drain oil pipe 52 after passing through this pipe 52 attached to a lower part of the frame 5, so that oil and the liquid refrigerant are separated from each other. Since an oil pump 32 is merely opened to the liquid sump 86, oil supplying is sufficiently carried out.
| JP2011247124 | COMPRESSOR |
| WO/2015/025755 | VACUUM PUMP MECHANISM |
| WO/2002/030726 | VACUUM PUMP FOR A SERVOSYSTEM IN A MOTOR VEHICLE |
SUGAWA MASAAKI
EZAKI HIROYUKI
