Patent ID: 9217589
Filing Date: 2015-12-22
Classification: F01C,F04B,F04C,F25B

Abstract:
1. A refrigeration compressor comprising: a sealed enclosure containing a compression stage and provided with a refrigerant inlet and a refrigerant outlet, the compressor being configured such that under usage conditions, a flow of refrigerant circulates through the refrigerant inlet, the compression stage, and the refrigerant outlet, an oil pan housed in the lower portion of the sealed enclosure, oil recirculation means arranged to orient the oil contained in the oil pan into the flow of refrigerant when the oil in the oil pan reaches or exceeds a predetermined oil level, the recirculation means including a recirculation line housed in the sealed enclosure, the recirculation line comprising an inlet port emerging in the sealed enclosure and situated at a height substantially corresponding to the predetermined oil level, an outlet port emerging in the refrigerant flow, and an intermediate part connecting the inlet and outlet port of the recirculation line, wherein the intermediate part includes at least one first portion extending below the predetermined oil level, such that, when the oil in the oil pan exceeds the predetermined oil level, the excess oil penetrates the inlet port of the recirculation line and falls into the first portion by gravity, the compressor includes an electric motor equipped with a stator and a rotor, and an intermediate casing surrounding the stator so as to delimit an annular outer volume with the sealed enclosure on the one hand and an inner volume on the other hand, and the outlet port of the recirculation line emerges in the inner volume delimited by the intermediate casing.