Patent ID: 8851868
Filing Date: 2014-10-07
Classification: F04C

Abstract:
1. A multi-start scroll compressor comprising: a first scroll being one of a fixed scroll and an orbiting scroll; and a second scroll being the other of the fixed scroll and the orbiting scroll, wherein the first scroll comprises a first scroll plate and a first scroll wall arranged to define a flow path including a first portion in which the first scroll plate and first scroll wall define a plurality of substantially parallel channels that extend from an inlet and converge at a second portion in which the first scroll plate and the first scroll wall define a single channel extending to an outlet, and wherein the second scroll comprises a second scroll plate and second scroll wall intermeshing with the first scroll wall of the first scroll so that on relative orbital movement of the first and second scrolls, a volume of gas is trapped between the first and second scrolls and pumped in parallel through the plurality of substantially parallel channels along the first portion of the flow path from the inlet to converge at the second portion and be pumped along the second portion of the flow path to the outlet, and wherein an axial extent of the trapped volume between the first and second scroll plates is less along the first portion of the flow path than the axial extent of the trapped volume along the second portion of the flow path.