A variable-speed refrigerating scroll compressor with an oil flow regulating device

A scroll compressor comprising:

• a compressor casing provided with a suction fitting configured to supply the scroll compressor with refrigerant gas to be compressed and a discharge fitting configured to discharge compressed refrigerant gas,
• a compression unit mounted inside the compressor casing and configured to compress the refrigerant gas supplied by the suction fitting, the compression unit including a fixed scroll and an orbiting scroll configured to perform an orbiting movement relative to the fixed scroll during operation of the scroll compressor, the fixed scroll and the orbiting scroll defining a compression volume,
• an oil sump disposed inside the compressor casing,
• a drive shaft disposed inside the compressor casing and including a driving portion coupled with the orbiting scroll and configured to drive the orbiting scroll in an orbital movement, the drive shaft being rotatable around a rotation axis,
• a variable-speed electric motor disposed inside the compressor casing and configured to rotatably drive the drive shaft,
• an oil injection system configured to inject oil at least into the compression volume, the oil injection system including an oil feed channel fluidly connected to the oil sump and extending over the entire length of the drive shaft, and oil injection means provided on the orbiting scroll and configured to deliver oil from the oil feed channel to the compression volume, and
• an oil flow regulating device configured to regulate an oil flow from the oil feed channel to the oil injection system, the oil flow regulating device including:
• a mounting body mounted at an upper end face of the driving portion, wherein the upper end face of the driving portion and the mounting body define a first volume in flow communication with the oil feed channel of the drive shaft, and the mounting body and the orbiting scroll at least partially define a second volume in flow communication with the oil injection means,
• an oil passage opening formed in the mounting body and through which the first volume and the second volume are configured to be in flow communication with each other, and
• an oil flow regulating member movable between a first position at a first speed of the variable-speed electric motor and a second position at a second speed of the variable-speed electric motor being higher than the first speed, wherein the oil flow regulating member allows an oil flow through the oil passage opening when the oil flow regulating member is in the first position and limits the oil flow through the oil passage opening when the oil flow regulating member is in the second position.