SCROLL TYPE COMPRESSOR WITH DISPLACEMENT ADJUSTING MECHANISM

摘要

A scroll type compressor is disclosed. The compressor includes a housing. A fixed scroll is joined to the housing and includes a first end plate from which a first wrap extends. An orbiting scroll also includes second end plate from which a second wrap extends. The wraps interfit at an angular and radial offset to make a plurality of line contacts to define at least one pair of sealed off fluid pockets. The first end plate is formed with at least two holes which are placed at the symmetrical positions. A first of the holes is placed at a location, defined by involute angles, within the area defined by phi end > phi 1> phi end-2 pi , where phi 0 end is the final involute angle of the wrap which extends from the end plate having the holes, and phi 1 is the involute angle at which the first hole is placed. The second hole is located at an involute angle approximately phi 1- pi . A control mechanism controls the opening and closing of the holes to thereby control the capacity of compressor.