Abstract: The scroll compressor chambers are classified a-type and b-type by its types of pitch line, its length, width and normal area are defined. Using analytical method, the geometrical model that synthesized the profile, form, deformation, lifecycle and the living numbers of scroll compressor chambers is established. The geometric characteristics of scroll compressor chambers, such as length, width, area, volume, center of mass and curvature radius of mesh point are analyzed. The established geometrical model could demonstrate the forming, deforming and vanishing process, so all geometric characteristics of scroll compressor chambers can be overall analyzed which could serve as the foundations of scroll chmaber’s researches on geometry, kinematics, dynamics, thermodynamics, simulation and design. The changes for Ⅲ?type profile compressor chambers are too complex, the deformation and dynamics characteristics for Ⅱ?type profile compressor chambers are more steady, the deformation efficiency for Ⅰ?type profile compressor chambers is high and it is easy to machining. Consequently based on Ⅰ?type profile, the hybrid profile modified in centric meshing part by Ⅱ?type profile is well adopted in practice.

Key words: General profile, Geometrical model, Scroll Compressor, Scroll compressor chamber, disturbance, dynamic model, manufacturing unit, manufacturing network