| 摘要 |
<p>A scroll type compressor with a variable displacement mechanism is disclosed which includes a housing (10) with an inner chamber and fluid inlet and outlet ports connected to the inner chamber. A fixed scroll (21), which is mounted within the housing, has an end plate (211) from which a first spiral wrap (212) extends. An orbiting scroll (22) also is mounted within the housing for orbital motion with respect to the fixed scroll. The orbiting scroll has an end plate (221) from which a second spiral wrap (222) extends. The first and second wraps interfit to define at least one pair of sealed off fluid pockets. The end plate (211) of the fixed scroll partitions the inner chamber of the housing into a suction chamber (271) and rear chamber (28). The rear chamber includes an intermediate pressure (282) chamber which communicates with the sealed off fluid pockets through a pair of circular holes (214,215 not shown) formed at the end plate of the fixed scroll. A control mechanism (36) controls fluid communication between the intermediate pressure chamber (282) and the suction chamber (271). A plurality of seal elements (240a,240b,240c) located along the axial end of the second wrap (222) are spaced by the certain portions which are positioned so as to cross over the circular holes (214,215) during orbital motion of the orbiting scroll. Thereby, even when the diameter of the circular holes are enlarged to prevent the undesirable pressure drop at the circular holes in the compressor high rotational speed, damage of the seal elements can be prevented. <IMAGE></p> |
