Patent ID: 7490541

Claim:
A compressor comprising a compressing mechanism which compresses fluid including a lubricant, a separation chamber into which the fluid compressed by said compressing mechanism is introduced by an introducing hole and in which at least a portion of the lubricant included in the fluid is separated from the fluid, an oil-storage chamber in which the lubricant separated from the fluid in said separation chamber is stored, and a communication passage having a cylindrical shape being provided between said separation chamber and an upper portion of said oil-storage chamber, wherein an oil-introducing passage is formed between said separation chamber and said oil-storage chamber to bring these chambers into communication with each other, said oil-introducing passage is formed such as to extend vertically downward from said separation chamber, a cross-sectional area of said oil-introducing passage is smaller than cross-sectional area of said separation chamber, and an opening of said oil-introducing passage on the side of said oil-storage chamber opens at a lower end of said oil-introducing passage, said oil-introducing passage introduces the lubricant separated in said separation chamber into said oil-storage chamber, an opening of said oil-introducing passage on the side of said oil-storage chamber is lower than an oil level of the lubricant stored in said oil-storage chamber in the vertical direction, said separation chamber having a smooth cylindrical interior space without protrusions, the introducing hole is formed such that said fluid is discharged along the outer peripheral surface of said cylindrical space, said oil-introducing passage having a conical space, wherein the introducing hole, the communication passage, and the opening are spaced apart from each other.