Patent ID: 8070465

Claim:
A refrigerating compressor with variable-speed coils, comprising: a sealed chamber delimiting a suction volume and a compression volume arranged respectively on either side of a body contained in the sealed chamber, the compression volume containing a first volute and a second volute, the first and second volutes describing an orbital relative movement, an oil injection circuit arranged to inject oil into the compression volume, a drive shaft comprising an oil feed pipe extending over an entire length of the drive shaft, the oil feed pipe being fed with oil from an oil pan by an oil pump arranged at a first end of the drive shaft, a second end of the drive shaft being fitted with a drive device, operating in an orbital movement, of the second volute contained in the compression volume, wherein the second volute comprises oil injection means arranged to place the oil feed pipe in communication with the compression volume, and the oil injection circuit comprises a moving blocking piece, operated by a centrifugal force, between a first position freeing the oil injection means enabling oil injection into the compression volume and a second position blocking the oil injection means preventing oil injection into the compression volume, the blocking piece being arranged to be displaced into the second position when a speed of the refrigerating compressor exceeds a predetermined value.