Scroll compressor

A scroll compressor comprising:

• a frame fixedly installed in a casing to support a rotary shaft of a driving motor, and having a second suction opening at its one side, a second discharge opening at another side and a vane slit at still another side;
• a fixed scroll fixedly installed at the frame and having a wrap of an involute shape at its upper surface, a first suction opening at its edgemost and a first discharge opening at its central portion;
• an orbiting scroll having a wrap of an involute shape at its upper surface so that the wrap forms a first compression chamber by being engaged with the wrap of the fixed scroll, and having at its lower surface a boss portion where an eccentric portion of the rotary shaft is inserted to thereby make an orbiting movement by a rotation of the rotary shaft;
• a self-rotation preventing member interposed between the frame and the orbiting scroll, for preventing a self-rotation of the orbiting scroll and inducing an orbiting movement;
• and
• a vane making a linear movement in a radial direction of the frame according to an orbiting movement of the orbiting scroll, and forming a second compression chamber including a space where the second suction opening exists and a space where the second discharge opening exists, between the frame and the orbiting scroll.