SCROLL TYPE COMPRESSOR

摘要

A fixed scroll (2) and a movable scroll (4) form a compression chamber (16). A first back pressure chamber (14) is formed on the back surface of the movable scroll (4). The first back pressure chamber receives a fluid of a discharge pressure. An unloader mechanism (11) is provided for guiding refrigerant gas from the compression chamber (16a) in the process of compression toward a suction port (13). A control part (31) is provided for controlling the unloader mechanism (11). When separating force is to exceed pressing force, the control part detects this and operates the unloader part for guiding the fluid from the compression chamber in the process of compression toward the suction part. Thus obtained is a scroll compressor attaining relatively sufficient pressing force by reducing separating force also when pressing force is reduced and suppressing internal leakage. <IMAGE>