Patent ID: 7165954

Claim:
An apparatus for preventing a vacuum state in a scroll compressor including a hermetic container divided into a high pressure space and a low pressure space; a fixed scroll provided inside the hermetic container; and an orbiting scroll orbiting in a state of being interlocked with the fixed scroll, comprising: a connecting passage for connecting the high pressure space, the low pressure space and a compression pocket to each other, wherein the compression pocket is formed by a wrap of the fixed scroll and a wrap of the orbiting scroll; a slider movably inserted in the connecting passage, for allowing the high pressure space and the low pressure space of the hermetic container to communicate with or be blocked from each other by a pressure difference between the low pressure space of the hermetic container and the compression pocket, the slider including: a body having a certain length and a sectional shape corresponding to that of the sliding hole; a stepped protrusion extending from one side of the body and having a certain length and a sectional area smaller than that of the body, to which pressure of the compression pocket side is applied; and a plurality of ring-shaped grooves formed on an outer circumferential surface of the body, each of the plurality of ring-shaped grooves including a flat bottom portion; and an elastic support means for elastically supporting the slider.