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A scroll type compressor unit including a compressor housing having fluid inlet and outlet ports, and two fixed and orbiting scroll members within the compressor housing. Each scroll member has an end plate and a spiral element which are maintained angularly and radially offset so that both spiral e

A scroll type compressor unit including a compressor housing having fluid inlet and outlet ports, and two fixed and orbiting scroll members within the compressor housing. Each scroll member has an end plate and a spiral element which are maintained angularly and radially offset so that both spiral elements interfit with a line contacts between the spiral curved surfaces to define moving sealed off pockets. In order that the fluid may be reliably taken into all fluid pockets, the end plate of the fixed scroll member is formed with a suction port connecting to the fluid inlet port at a position adjacent to the outer terminal end of the orbiting spiral element. Thus, the fluid introduced through the suction port may be taken into a fluid pocket which is formed at the outer terminal end portion of the orbiting spiral element and is sent along the outer surface of the orbiting spiral element to a fluid pocket which is formed at the outer terminal end of the fixed spiral element. The fixed spiral element is formed so that its outer terminal end engages with the inner surface of the compressor housing, and a seal plate member is disposed to close the gap between the inner surface of the housing and the peripheral surface of the orbiting end plate. This permits the fluid sent to the outer terminal end portion of the fixed spiral element to be pre-compressed.

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A scroll type compressor unit comprising: a compressor housing having a fluid inlet port and a fluid outlet port, said housing includes a rear end plate, said rear end plate having a fluid suction chamber connected to said fluid inlet port and a fluid discharge chamber connected to said fluid outlet

A scroll type compressor unit comprising: a compressor housing having a fluid inlet port and a fluid outlet port, said housing includes a rear end plate, said rear end plate having a fluid suction chamber connected to said fluid inlet port and a fluid discharge chamber connected to said fluid outlet port, a fixed scroll member fixedly disposed within said compressor housing and having first end plate means lying in a substantially vertical direction to which first wrap means are affixed, a first chamber defined by the inner surface of said compressor housing and said first end plate means of said fixed scroll member and containing said first wrap means therein, an orbiting scroll member orbitally disposed within said first chamber and having second end plate means to which second wrap means are affixed, said first and second wrap means interfitting at an angular offset of 180°with a plurality of line contacts to define at least one sealed off fluid pocket which moves with a consequent reduction of volume thereof by the orbital motion of said orbiting scroll member, to thereby compress the fluid in the pocket, said first end plate means at an upper portion thereof being provided with a first hole outside said first wrap means and adjacent to the outer terminal end of said second wrap means, a second hole at a position corresponding to the center of said first wrap means, said first hole being connected through said suction chamber to said fluid inlet port to thereby introduce the fluid from said inlet port into said first chamber so that a portion of the fluid enters the space between said outer terminal end portion of said second wrap means and the adjacent first wrap means to be compressed, with the other portion of said fluid flowing along said second wrap means into another space between the outer terminal end portion of said first wrap means and the adjacent second wrap means to be compressed, oil separator means disposed within said suction chamber to prevent said fluid from directly flowing into said first hole to thereby separate lubricating oil mixed in the fluid, an oil passageway connecting said first chamber and the lower portion of said suction chamber to return the separated oil into said first chamber, and said second hole being connected through said discharge chamber to said fluid outlet port so that the compressed fluid is discharged from said second hole and said outlet port. A scroll type compressor unit comprising: a compressor housing with a cylindrical inner surface, a fixed scroll member fixedly disposed within said compressor housing and having first end plate means to which first wrap means are affixed, the outer terminal end of said first wrap means extending on said first end plate means so that it engages the inner surface of said compressor housing, an orbiting scroll member orbitally disposed within said housing and having second end plate means to which second wrap means are affixed, said second wrap means having the same number of turns as said first wrap means with a portion thereof from its outer terminal end to a position so as to connect with the outer terminal end of said first wrap means having an outer contour of an arcuate curve of a radius equal to the length from its spiral center to the outer edge of its outer terminal end, first means for closing the gap between the outer peripheral end of said second end plate and said cylindrical inner surface of said compressor housing but permitting the orbital motion of said orbiting scroll member, said first and second wrap means interfitting at an angular offset of 180° with a plurality of line contacts to define at least one pair of sealed off fluid pockets which move with a consequent reduction of volume thereof by the oribital motion of said orbiting scroll member to thereby compress the fluid in the pocket.